Resubmissions

28-06-2024 13:06

240628-qce7ba1clf 10

28-06-2024 13:02

240628-p94qhateml 10

Analysis

  • max time kernel
    143s
  • max time network
    133s
  • platform
    windows7_x64
  • resource
    win7-20240611-en
  • resource tags

    arch:x64arch:x86image:win7-20240611-enlocale:en-usos:windows7-x64system
  • submitted
    28-06-2024 13:02

General

  • Target

    MT103-0011.06272024.exe

  • Size

    870KB

  • MD5

    95dc64015aa43a27412f7ff0979c5b87

  • SHA1

    bde0ae97f4f98c0dd8a0833702ff073befbec268

  • SHA256

    a7d2ea641dbc8e50000e6b42c9cca200fa25d5e37ddd1857eb489795ab5564ee

  • SHA512

    450a8ba7eb3c3178b5567b692d55518d393af5d971bb22ab13e1c9078c9ea389f1a9e28d391a8882ef8d1b99972ec27af64fa2c7aa8fa79c9c0d2423d0176d10

  • SSDEEP

    12288:XcIjd3nQIQsk3na+QiLPTEYLwdLh5d2tqnXQJgcCp8vGiVIkk84n5QWrV:XcIjUna3iLtwb/2tWXMi2rq7nHB

Malware Config

Extracted

Family

agenttesla

Credentials

Signatures

  • AgentTesla

    Agent Tesla is a remote access tool (RAT) written in visual basic.

  • Guloader,Cloudeye

    A shellcode based downloader first seen in 2020.

  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • Reads user/profile data of web browsers 2 TTPs

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

  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\MT103-0011.06272024.exe
    "C:\Users\Admin\AppData\Local\Temp\MT103-0011.06272024.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • Drops file in Windows directory
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:2132
    • C:\Users\Admin\AppData\Local\Temp\MT103-0011.06272024.exe
      "C:\Users\Admin\AppData\Local\Temp\MT103-0011.06272024.exe"
      2⤵
      • Suspicious use of NtCreateThreadExHideFromDebugger
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2260

Network

MITRE ATT&CK Matrix ATT&CK v13

Credential Access

Unsecured Credentials

2
T1552

Credentials In Files

2
T1552.001

Discovery

System Information Discovery

1
T1082

Collection

Data from Local System

2
T1005

Replay Monitor

Loading Replay Monitor...

Downloads

  • \Users\Admin\AppData\Local\Temp\nst1CF5.tmp\System.dll
    Filesize

    11KB

    MD5

    55a26d7800446f1373056064c64c3ce8

    SHA1

    80256857e9a0a9c8897923b717f3435295a76002

    SHA256

    904fd5481d72f4e03b01a455f848dedd095d0fb17e33608e0d849f5196fb6ff8

    SHA512

    04b8ab7a85c26f188c0a06f524488d6f2ac2884bf107c860c82e94ae12c3859f825133d78338fd2b594dfc48f7dc9888ae76fee786c6252a5c77c88755128a5b

  • memory/2132-25-0x0000000004180000-0x0000000006B27000-memory.dmp
    Filesize

    41.7MB

  • memory/2132-26-0x0000000077031000-0x0000000077132000-memory.dmp
    Filesize

    1.0MB

  • memory/2132-27-0x0000000077030000-0x00000000771D9000-memory.dmp
    Filesize

    1.7MB

  • memory/2132-29-0x0000000004180000-0x0000000006B27000-memory.dmp
    Filesize

    41.7MB

  • memory/2132-32-0x0000000004180000-0x0000000006B27000-memory.dmp
    Filesize

    41.7MB

  • memory/2260-28-0x0000000077030000-0x00000000771D9000-memory.dmp
    Filesize

    1.7MB

  • memory/2260-30-0x00000000004A0000-0x0000000001502000-memory.dmp
    Filesize

    16.4MB

  • memory/2260-33-0x00000000004A0000-0x00000000004E0000-memory.dmp
    Filesize

    256KB