Analysis

  • max time kernel
    146s
  • max time network
    146s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    17-06-2024 01:08

General

  • Target

    4833f6e7b2beb3821ccd544a936f3d6db6403ee58c05038f15f2d1544f2acd3c.exe

  • Size

    3.1MB

  • MD5

    35dea5908c411c55232760a766992b4d

  • SHA1

    803e87e294445707b2480e0f6eeb21990be7522e

  • SHA256

    4833f6e7b2beb3821ccd544a936f3d6db6403ee58c05038f15f2d1544f2acd3c

  • SHA512

    37f37e706d7ba27a00d06f5d30ba881b3cf606a74b0472a404e76acad17e446cf22bdcddbe5b79fa73f457302c028aca46e971a97543d3d1784c2393bff91631

  • SSDEEP

    49152:DvrI22SsaNYfdPBldt698dBcjHCdHLoGdgTHHB72eh2NT:DvU22SsaNYfdPBldt6+dBcjHCdr

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

hvhkcutuoujbobu672-22209.portmap.host:22209

Mutex

979a24d1-1ef3-4416-baf8-bf96d2280aed

Attributes
  • encryption_key

    E634ECEC5FEC379E441CB9B04C771BAC550131B0

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    service 32

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 8 IoCs
  • Detects Windows executables referencing non-Windows User-Agents 8 IoCs
  • Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 8 IoCs
  • Detects executables containing common artifacts observed in infostealers 8 IoCs
  • Executes dropped EXE 7 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Creates scheduled task(s) 1 TTPs 8 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Runs ping.exe 1 TTPs 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 8 IoCs
  • Suspicious use of SetWindowsHookEx 7 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\4833f6e7b2beb3821ccd544a936f3d6db6403ee58c05038f15f2d1544f2acd3c.exe
    "C:\Users\Admin\AppData\Local\Temp\4833f6e7b2beb3821ccd544a936f3d6db6403ee58c05038f15f2d1544f2acd3c.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2740
    • C:\Windows\system32\schtasks.exe
      "schtasks" /create /tn "service 32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
      2⤵
      • Creates scheduled task(s)
      PID:2972
    • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2664
      • C:\Windows\system32\schtasks.exe
        "schtasks" /create /tn "service 32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        3⤵
        • Creates scheduled task(s)
        PID:2688
      • C:\Windows\system32\cmd.exe
        cmd /c ""C:\Users\Admin\AppData\Local\Temp\j5zdzTxQNSql.bat" "
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2468
        • C:\Windows\system32\chcp.com
          chcp 65001
          4⤵
            PID:2540
          • C:\Windows\system32\PING.EXE
            ping -n 10 localhost
            4⤵
            • Runs ping.exe
            PID:1516
          • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
            "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
            4⤵
            • Executes dropped EXE
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:1216
            • C:\Windows\system32\schtasks.exe
              "schtasks" /create /tn "service 32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
              5⤵
              • Creates scheduled task(s)
              PID:1348
            • C:\Windows\system32\cmd.exe
              cmd /c ""C:\Users\Admin\AppData\Local\Temp\YSTrDs8Pt6ID.bat" "
              5⤵
              • Suspicious use of WriteProcessMemory
              PID:1576
              • C:\Windows\system32\chcp.com
                chcp 65001
                6⤵
                  PID:1552
                • C:\Windows\system32\PING.EXE
                  ping -n 10 localhost
                  6⤵
                  • Runs ping.exe
                  PID:1020
                • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
                  6⤵
                  • Executes dropped EXE
                  • Suspicious use of AdjustPrivilegeToken
                  • Suspicious use of SetWindowsHookEx
                  • Suspicious use of WriteProcessMemory
                  PID:1416
                  • C:\Windows\system32\schtasks.exe
                    "schtasks" /create /tn "service 32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
                    7⤵
                    • Creates scheduled task(s)
                    PID:1616
                  • C:\Windows\system32\cmd.exe
                    cmd /c ""C:\Users\Admin\AppData\Local\Temp\yEX4uvlRLlnN.bat" "
                    7⤵
                    • Suspicious use of WriteProcessMemory
                    PID:2448
                    • C:\Windows\system32\chcp.com
                      chcp 65001
                      8⤵
                        PID:2212
                      • C:\Windows\system32\PING.EXE
                        ping -n 10 localhost
                        8⤵
                        • Runs ping.exe
                        PID:528
                      • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                        "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
                        8⤵
                        • Executes dropped EXE
                        • Suspicious use of AdjustPrivilegeToken
                        • Suspicious use of SetWindowsHookEx
                        • Suspicious use of WriteProcessMemory
                        PID:1656
                        • C:\Windows\system32\schtasks.exe
                          "schtasks" /create /tn "service 32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
                          9⤵
                          • Creates scheduled task(s)
                          PID:796
                        • C:\Windows\system32\cmd.exe
                          cmd /c ""C:\Users\Admin\AppData\Local\Temp\TaFdF4PGxgkL.bat" "
                          9⤵
                          • Suspicious use of WriteProcessMemory
                          PID:412
                          • C:\Windows\system32\chcp.com
                            chcp 65001
                            10⤵
                              PID:2084
                            • C:\Windows\system32\PING.EXE
                              ping -n 10 localhost
                              10⤵
                              • Runs ping.exe
                              PID:3056
                            • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                              "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
                              10⤵
                              • Executes dropped EXE
                              • Suspicious use of AdjustPrivilegeToken
                              • Suspicious use of SetWindowsHookEx
                              PID:1700
                              • C:\Windows\system32\schtasks.exe
                                "schtasks" /create /tn "service 32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
                                11⤵
                                • Creates scheduled task(s)
                                PID:984
                              • C:\Windows\system32\cmd.exe
                                cmd /c ""C:\Users\Admin\AppData\Local\Temp\zirWaHV2QH3r.bat" "
                                11⤵
                                  PID:2808
                                  • C:\Windows\system32\chcp.com
                                    chcp 65001
                                    12⤵
                                      PID:1928
                                    • C:\Windows\system32\PING.EXE
                                      ping -n 10 localhost
                                      12⤵
                                      • Runs ping.exe
                                      PID:1912
                                    • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                                      "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
                                      12⤵
                                      • Executes dropped EXE
                                      • Suspicious use of AdjustPrivilegeToken
                                      • Suspicious use of SetWindowsHookEx
                                      PID:2308
                                      • C:\Windows\system32\schtasks.exe
                                        "schtasks" /create /tn "service 32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
                                        13⤵
                                        • Creates scheduled task(s)
                                        PID:2876
                                      • C:\Windows\system32\cmd.exe
                                        cmd /c ""C:\Users\Admin\AppData\Local\Temp\PF1Ygn41qqhm.bat" "
                                        13⤵
                                          PID:2316
                                          • C:\Windows\system32\chcp.com
                                            chcp 65001
                                            14⤵
                                              PID:2596
                                            • C:\Windows\system32\PING.EXE
                                              ping -n 10 localhost
                                              14⤵
                                              • Runs ping.exe
                                              PID:2728
                                            • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                                              "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
                                              14⤵
                                              • Executes dropped EXE
                                              • Suspicious use of AdjustPrivilegeToken
                                              • Suspicious use of SetWindowsHookEx
                                              PID:1600
                                              • C:\Windows\system32\schtasks.exe
                                                "schtasks" /create /tn "service 32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
                                                15⤵
                                                • Creates scheduled task(s)
                                                PID:340
                                              • C:\Windows\system32\cmd.exe
                                                cmd /c ""C:\Users\Admin\AppData\Local\Temp\U4BygHjo7nki.bat" "
                                                15⤵
                                                  PID:2060
                                                  • C:\Windows\system32\chcp.com
                                                    chcp 65001
                                                    16⤵
                                                      PID:2480
                                                    • C:\Windows\system32\PING.EXE
                                                      ping -n 10 localhost
                                                      16⤵
                                                      • Runs ping.exe
                                                      PID:1484

                      Network

                      MITRE ATT&CK Matrix ATT&CK v13

                      Execution

                      Scheduled Task/Job

                      1
                      T1053

                      Persistence

                      Scheduled Task/Job

                      1
                      T1053

                      Privilege Escalation

                      Scheduled Task/Job

                      1
                      T1053

                      Discovery

                      System Information Discovery

                      1
                      T1082

                      Remote System Discovery

                      1
                      T1018

                      Query Registry

                      1
                      T1012

                      Replay Monitor

                      Loading Replay Monitor...

                      Downloads

                      • C:\Users\Admin\AppData\Local\Temp\PF1Ygn41qqhm.bat
                        Filesize

                        207B

                        MD5

                        8755cf8a854d402495a9c11f98721c59

                        SHA1

                        a15b2fac6460f5506b4c5488754640f0b54741d9

                        SHA256

                        b08d8a9e446a4a0b4e26ba75d2eee1e08cdf8ae94b404331a51b6f2a0bc4b48d

                        SHA512

                        140832dfe8a5cbd03d2431dced3713d3e8e9d50cceaf151751f14c3a9daec37ced356462cbbeee4e906ca6f04eaeda19d5f1dfec9c7bee8f877a8d9a424ad93d

                      • C:\Users\Admin\AppData\Local\Temp\TaFdF4PGxgkL.bat
                        Filesize

                        207B

                        MD5

                        4c853a3755b8c50d5d0196f8550104d8

                        SHA1

                        bcddf8eabc5fba79c5448f6134c8b229c96f82ac

                        SHA256

                        32dbb4d3374f2728d2b2e6d38d7d0e1e5b50a7e98ce1babd3e3dadf6465ac937

                        SHA512

                        7213021737b9622480e8b110e9a64f9c98b031dc20ab8d48ea97825e09f60473d7ffcd6aa95c6b9adedab8fcd1e64945fc5cc66270947a9616f0f50bd6f4065d

                      • C:\Users\Admin\AppData\Local\Temp\U4BygHjo7nki.bat
                        Filesize

                        207B

                        MD5

                        616d01c57bd5e9905b958f2b6f81fd05

                        SHA1

                        02f54a6514a3fa832a6788505b82744f339fc1de

                        SHA256

                        1b1eecbac5d2ad71119fc626f1f31cf75da992b355d592421d3afe196725607e

                        SHA512

                        11240e21b154c511e30e53a8182b8972bba6ae72b2db7ede007088d0d15572b186cbcbb875aa4f6bcf76aa83cee145ba6c2c762c019fc05b763d5f4b7c0af69b

                      • C:\Users\Admin\AppData\Local\Temp\YSTrDs8Pt6ID.bat
                        Filesize

                        207B

                        MD5

                        2f23cac9bef06a7a32845c1e8a62134c

                        SHA1

                        91974b78ed89120a6082a76d4b66314d4fdbcee0

                        SHA256

                        7854f2a0528f5337aa51565c9a9c7e63f40cba7a32079abeab8651b2f19a83c6

                        SHA512

                        0c7363e33caf370382e65fd5a08aa393eed6f720c0ff1fa1fe966b9494c462e2a36cbe141b405b96a814d5d9c70630321474e6021cd0739362c83e73c9454d33

                      • C:\Users\Admin\AppData\Local\Temp\j5zdzTxQNSql.bat
                        Filesize

                        207B

                        MD5

                        47ae7284256e7d015912a071ad6d312d

                        SHA1

                        219d568878968283471c718267911d944799f5b3

                        SHA256

                        901a22983828c8578f38c50da6c2e3fc5d09b57bafccdac8512d35d21b5ae813

                        SHA512

                        03867858eb631cb3b5083c056281a5212f99d4de0d2e40800b88d0ee9a1cfc16e5eba7fe7b40353208b8a55399470e7b448c9645acf81fafb2ad6728a2af22f8

                      • C:\Users\Admin\AppData\Local\Temp\yEX4uvlRLlnN.bat
                        Filesize

                        207B

                        MD5

                        58b67c0c5f79041ef3003e04c813610b

                        SHA1

                        61a552d8b9d6d701f19bfc7a2722cf140a612c45

                        SHA256

                        8a31949b647c407cf2bb02c3fe3d81e29c6a9688cc916af65b3192eeaed94de4

                        SHA512

                        99057193e3dc9fe340fdeedb2755e57dd3c6583e043bd8cb834ceff7c532b747920504e3d82c6a3de0d5ec4dccb0040fae94b5006c5748e1ea1cf6580eaec12c

                      • C:\Users\Admin\AppData\Local\Temp\zirWaHV2QH3r.bat
                        Filesize

                        207B

                        MD5

                        8c9a6a3485ff50753edbe522cd46cb63

                        SHA1

                        ec94e71345fedec299932db3c9a62ac1ff79607d

                        SHA256

                        73b64ccc1eded03d51f1d3720dffb2eb2065c188906805456296829c6d65a2d0

                        SHA512

                        040ad3e0ede94c2af6fa05a25f17e9054ae8bef4d787c7bd4017015bdccb6e8c3791a3e1808a4eb4fa040bdabbe095aafc039c145fd3e6fba03626a2949d6241

                      • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                        Filesize

                        3.1MB

                        MD5

                        35dea5908c411c55232760a766992b4d

                        SHA1

                        803e87e294445707b2480e0f6eeb21990be7522e

                        SHA256

                        4833f6e7b2beb3821ccd544a936f3d6db6403ee58c05038f15f2d1544f2acd3c

                        SHA512

                        37f37e706d7ba27a00d06f5d30ba881b3cf606a74b0472a404e76acad17e446cf22bdcddbe5b79fa73f457302c028aca46e971a97543d3d1784c2393bff91631

                      • memory/1216-23-0x0000000001020000-0x0000000001344000-memory.dmp
                        Filesize

                        3.1MB

                      • memory/1600-77-0x0000000001010000-0x0000000001334000-memory.dmp
                        Filesize

                        3.1MB

                      • memory/1656-44-0x0000000000330000-0x0000000000654000-memory.dmp
                        Filesize

                        3.1MB

                      • memory/1700-55-0x0000000000180000-0x00000000004A4000-memory.dmp
                        Filesize

                        3.1MB

                      • memory/2308-66-0x0000000000F40000-0x0000000001264000-memory.dmp
                        Filesize

                        3.1MB

                      • memory/2664-21-0x000007FEF6190000-0x000007FEF6B7C000-memory.dmp
                        Filesize

                        9.9MB

                      • memory/2664-11-0x000007FEF6190000-0x000007FEF6B7C000-memory.dmp
                        Filesize

                        9.9MB

                      • memory/2664-10-0x0000000000D60000-0x0000000001084000-memory.dmp
                        Filesize

                        3.1MB

                      • memory/2664-8-0x000007FEF6190000-0x000007FEF6B7C000-memory.dmp
                        Filesize

                        9.9MB

                      • memory/2740-9-0x000007FEF6190000-0x000007FEF6B7C000-memory.dmp
                        Filesize

                        9.9MB

                      • memory/2740-0-0x000007FEF6193000-0x000007FEF6194000-memory.dmp
                        Filesize

                        4KB

                      • memory/2740-2-0x000007FEF6190000-0x000007FEF6B7C000-memory.dmp
                        Filesize

                        9.9MB

                      • memory/2740-1-0x00000000000D0000-0x00000000003F4000-memory.dmp
                        Filesize

                        3.1MB