Analysis

  • max time kernel
    147s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20240419-en
  • resource tags

    arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
  • submitted
    01-07-2024 21:39

General

  • Target

    50dc80f4ab02549b730dc49de7d38924e3d063a9488d0414872a83406719f566.exe

  • Size

    918KB

  • MD5

    6322fbbf0d41682d0b0660b8ce0979a1

  • SHA1

    70447ab58b0903fdb0a7dc7dbbdff2d4ea16f3a1

  • SHA256

    50dc80f4ab02549b730dc49de7d38924e3d063a9488d0414872a83406719f566

  • SHA512

    2c069fd389ea134078f90bca9537c62a751869bd35d27921c956a4557007a50422c92df91081dfb294bff2dab2c3fa881ade4f3d9ac2f0b44aec7f98ebdf66bf

  • SSDEEP

    24576:aIw3ZQRZUWonR/qE6ufiV//fqatr1BingtJoI+4ud:aIw3GQ7nR/qE67zBtup

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

192.3.243.155:7643

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    remcos.exe

  • copy_folder

    Remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    false

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-KXS0YK

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

    Remcos is a closed-source remote control and surveillance software.

  • Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003) 26 IoCs
  • Detects executables built or packed with MPress PE compressor 12 IoCs
  • Detects executables packed with SmartAssembly 2 IoCs
  • Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers 1 IoCs
  • Detects executables referencing many email and collaboration clients. Observed in information stealers 1 IoCs
  • NirSoft MailPassView 1 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 1 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 3 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 40 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\50dc80f4ab02549b730dc49de7d38924e3d063a9488d0414872a83406719f566.exe
    "C:\Users\Admin\AppData\Local\Temp\50dc80f4ab02549b730dc49de7d38924e3d063a9488d0414872a83406719f566.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2420
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\50dc80f4ab02549b730dc49de7d38924e3d063a9488d0414872a83406719f566.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2888
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\elvGassltsBQCq.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:304
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\elvGassltsBQCq" /XML "C:\Users\Admin\AppData\Local\Temp\tmp46F4.tmp"
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:1996
    • C:\Users\Admin\AppData\Local\Temp\50dc80f4ab02549b730dc49de7d38924e3d063a9488d0414872a83406719f566.exe
      "C:\Users\Admin\AppData\Local\Temp\50dc80f4ab02549b730dc49de7d38924e3d063a9488d0414872a83406719f566.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1064
      • C:\Users\Admin\AppData\Local\Temp\50dc80f4ab02549b730dc49de7d38924e3d063a9488d0414872a83406719f566.exe
        C:\Users\Admin\AppData\Local\Temp\50dc80f4ab02549b730dc49de7d38924e3d063a9488d0414872a83406719f566.exe /stext "C:\Users\Admin\AppData\Local\Temp\oczwqvdtpjiblujqejn"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        PID:584
      • C:\Users\Admin\AppData\Local\Temp\50dc80f4ab02549b730dc49de7d38924e3d063a9488d0414872a83406719f566.exe
        C:\Users\Admin\AppData\Local\Temp\50dc80f4ab02549b730dc49de7d38924e3d063a9488d0414872a83406719f566.exe /stext "C:\Users\Admin\AppData\Local\Temp\ywepqnomdragwifunuaybm"
        3⤵
        • Accesses Microsoft Outlook accounts
        PID:1532
      • C:\Users\Admin\AppData\Local\Temp\50dc80f4ab02549b730dc49de7d38924e3d063a9488d0414872a83406719f566.exe
        C:\Users\Admin\AppData\Local\Temp\50dc80f4ab02549b730dc49de7d38924e3d063a9488d0414872a83406719f566.exe /stext "C:\Users\Admin\AppData\Local\Temp\byjzrgzozzstyotyxfnzmzzsh"
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:576

Network

MITRE ATT&CK Matrix ATT&CK v13

Execution

Command and Scripting Interpreter

1
T1059

PowerShell

1
T1059.001

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Persistence

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Privilege Escalation

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Credential Access

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

System Information Discovery

1
T1082

Collection

Data from Local System

1
T1005

Email Collection

1
T1114

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\remcos\logs.dat
    Filesize

    144B

    MD5

    5e542545b367d69834c20a1d850934ed

    SHA1

    b60b93ac3e6aadba54b0cf70931939791a1c835a

    SHA256

    29081c07d21e9cd3648d36b661d77aca201990312e8e402bc531e6e5e1e59c9f

    SHA512

    e22aaae704ebed7ad55519feac1a391bb35e01b0680e028fee0d4b79186d737009a7c0498825cbe98c152a77d2ce6bf9744e3e1a4eff94609ed4551141b8041d

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015
    Filesize

    70KB

    MD5

    49aebf8cbd62d92ac215b2923fb1b9f5

    SHA1

    1723be06719828dda65ad804298d0431f6aff976

    SHA256

    b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

    SHA512

    bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

  • C:\Users\Admin\AppData\Local\Temp\TarFA1.tmp
    Filesize

    181KB

    MD5

    4ea6026cf93ec6338144661bf1202cd1

    SHA1

    a1dec9044f750ad887935a01430bf49322fbdcb7

    SHA256

    8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

    SHA512

    6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

  • C:\Users\Admin\AppData\Local\Temp\oczwqvdtpjiblujqejn
    Filesize

    2B

    MD5

    f3b25701fe362ec84616a93a45ce9998

    SHA1

    d62636d8caec13f04e28442a0a6fa1afeb024bbb

    SHA256

    b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

    SHA512

    98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

  • C:\Users\Admin\AppData\Local\Temp\tmp46F4.tmp
    Filesize

    1KB

    MD5

    597ecbce5a42887c2161e4e2f14bf607

    SHA1

    6c1260d88553d9b29e7746b2d0d9958521515a13

    SHA256

    437cb39257eddac0395d193911f2e999a119985625e743b701b9fb4690e27a2c

    SHA512

    0cc0f5974ce6b05ea1534944561fcbb0c20b4830fc71990f190bb487b798d93089fc8307171067dee712df8eb4267738c9b6473aca400ec8a4d07970976abadc

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms
    Filesize

    7KB

    MD5

    17493a3573b11d7371e00712ce3959cc

    SHA1

    6a970da0a0421bd9eab4c0c1a835e610e725b58a

    SHA256

    182dd3cc7317463954a0de72f28130e94e78dfcf819b71bd4bb691fff8128035

    SHA512

    c31061e1272dde7a0a32f977a5bcdda8b57e6c4f282d4f32d7bab5402416b0db240cff2b362d5b4201bf590a1474510b112e1479a20f386fa4d128ef8f553e90

  • memory/576-151-0x0000000000400000-0x0000000000424000-memory.dmp
    Filesize

    144KB

  • memory/576-153-0x0000000000400000-0x0000000000424000-memory.dmp
    Filesize

    144KB

  • memory/576-154-0x0000000000400000-0x0000000000424000-memory.dmp
    Filesize

    144KB

  • memory/584-157-0x0000000000400000-0x0000000000478000-memory.dmp
    Filesize

    480KB

  • memory/584-156-0x0000000000400000-0x0000000000478000-memory.dmp
    Filesize

    480KB

  • memory/584-147-0x0000000000400000-0x0000000000478000-memory.dmp
    Filesize

    480KB

  • memory/1064-143-0x0000000000400000-0x0000000000482000-memory.dmp
    Filesize

    520KB

  • memory/1064-145-0x0000000000400000-0x0000000000482000-memory.dmp
    Filesize

    520KB

  • memory/1064-132-0x0000000000400000-0x0000000000482000-memory.dmp
    Filesize

    520KB

  • memory/1064-131-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
    Filesize

    4KB

  • memory/1064-121-0x0000000000400000-0x0000000000482000-memory.dmp
    Filesize

    520KB

  • memory/1064-119-0x0000000000400000-0x0000000000482000-memory.dmp
    Filesize

    520KB

  • memory/1064-129-0x0000000000400000-0x0000000000482000-memory.dmp
    Filesize

    520KB

  • memory/1064-127-0x0000000000400000-0x0000000000482000-memory.dmp
    Filesize

    520KB

  • memory/1064-126-0x0000000000400000-0x0000000000482000-memory.dmp
    Filesize

    520KB

  • memory/1064-203-0x0000000000400000-0x0000000000482000-memory.dmp
    Filesize

    520KB

  • memory/1064-202-0x0000000000400000-0x0000000000482000-memory.dmp
    Filesize

    520KB

  • memory/1064-195-0x0000000000400000-0x0000000000482000-memory.dmp
    Filesize

    520KB

  • memory/1064-194-0x0000000000400000-0x0000000000482000-memory.dmp
    Filesize

    520KB

  • memory/1064-140-0x0000000000400000-0x0000000000482000-memory.dmp
    Filesize

    520KB

  • memory/1064-141-0x0000000000400000-0x0000000000482000-memory.dmp
    Filesize

    520KB

  • memory/1064-142-0x0000000000400000-0x0000000000482000-memory.dmp
    Filesize

    520KB

  • memory/1064-138-0x0000000000400000-0x0000000000482000-memory.dmp
    Filesize

    520KB

  • memory/1064-170-0x0000000010000000-0x0000000010019000-memory.dmp
    Filesize

    100KB

  • memory/1064-137-0x0000000000400000-0x0000000000482000-memory.dmp
    Filesize

    520KB

  • memory/1064-133-0x0000000000400000-0x0000000000482000-memory.dmp
    Filesize

    520KB

  • memory/1064-123-0x0000000000400000-0x0000000000482000-memory.dmp
    Filesize

    520KB

  • memory/1064-134-0x0000000000400000-0x0000000000482000-memory.dmp
    Filesize

    520KB

  • memory/1064-187-0x0000000000400000-0x0000000000482000-memory.dmp
    Filesize

    520KB

  • memory/1064-186-0x0000000000400000-0x0000000000482000-memory.dmp
    Filesize

    520KB

  • memory/1064-117-0x0000000000400000-0x0000000000482000-memory.dmp
    Filesize

    520KB

  • memory/1064-179-0x0000000000400000-0x0000000000482000-memory.dmp
    Filesize

    520KB

  • memory/1064-178-0x0000000000400000-0x0000000000482000-memory.dmp
    Filesize

    520KB

  • memory/1064-116-0x0000000000400000-0x0000000000482000-memory.dmp
    Filesize

    520KB

  • memory/1064-171-0x0000000000400000-0x0000000000482000-memory.dmp
    Filesize

    520KB

  • memory/1064-164-0x0000000000400000-0x0000000000482000-memory.dmp
    Filesize

    520KB

  • memory/1064-165-0x0000000000400000-0x0000000000482000-memory.dmp
    Filesize

    520KB

  • memory/1064-166-0x0000000010000000-0x0000000010019000-memory.dmp
    Filesize

    100KB

  • memory/1064-169-0x0000000010000000-0x0000000010019000-memory.dmp
    Filesize

    100KB

  • memory/1532-149-0x0000000000400000-0x0000000000462000-memory.dmp
    Filesize

    392KB

  • memory/1532-155-0x0000000000400000-0x0000000000462000-memory.dmp
    Filesize

    392KB

  • memory/1532-152-0x0000000000400000-0x0000000000462000-memory.dmp
    Filesize

    392KB

  • memory/1532-148-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
    Filesize

    4KB

  • memory/2420-0-0x0000000074D4E000-0x0000000074D4F000-memory.dmp
    Filesize

    4KB

  • memory/2420-1-0x0000000000CA0000-0x0000000000D88000-memory.dmp
    Filesize

    928KB

  • memory/2420-2-0x0000000074D40000-0x000000007542E000-memory.dmp
    Filesize

    6.9MB

  • memory/2420-139-0x0000000074D40000-0x000000007542E000-memory.dmp
    Filesize

    6.9MB

  • memory/2420-102-0x0000000006C80000-0x0000000006D40000-memory.dmp
    Filesize

    768KB

  • memory/2420-101-0x0000000004200000-0x000000000420C000-memory.dmp
    Filesize

    48KB

  • memory/2420-100-0x0000000000A10000-0x0000000000A20000-memory.dmp
    Filesize

    64KB