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Analysis

  • max time kernel
    182s
  • max time network
    46s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    03/12/2022, 13:21

General

  • Target

    c8235cf09120c1bf9a5c6caf885c1784178e4c30e9eef2d274902b32e0fc265a.exe

  • Size

    389KB

  • MD5

    eae6b37b6242cdeba60fd04f4d09dc8b

  • SHA1

    2a487a88a9a8f3663ed0f2a5d562af424b7bff21

  • SHA256

    c8235cf09120c1bf9a5c6caf885c1784178e4c30e9eef2d274902b32e0fc265a

  • SHA512

    76a69134b147535e88a7b58f59cd19efa0711f64181b0b0feff657ba993a2e33c4084ed6cd4728646403f4c7762afe47b4b031ddd0fb47085c27f859393e7c3d

  • SSDEEP

    6144:XEk6v38qdv4A9sE2bLutpL9v++JQegpbtKHWIhQFLfjWUkgd2d2NTAreVRcNoO:XEJ8qdgAIuwY/mcQxfjWUPFNcr0J

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

nicksrat.no-ip.biz:1604

Mutex

DC_MUTEX-H7FLLF9

Attributes
  • gencode

    t4wBhiJiyE7T

  • install

    false

  • offline_keylogger

    true

  • persistence

    false

Signatures

  • Darkcomet

    DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.

  • Executes dropped EXE 1 IoCs
  • UPX packed file 9 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Loads dropped DLL 1 IoCs
  • Uses the VBS compiler for execution 1 TTPs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of AdjustPrivilegeToken 23 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c8235cf09120c1bf9a5c6caf885c1784178e4c30e9eef2d274902b32e0fc265a.exe
    "C:\Users\Admin\AppData\Local\Temp\c8235cf09120c1bf9a5c6caf885c1784178e4c30e9eef2d274902b32e0fc265a.exe"
    1⤵
    • Loads dropped DLL
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:884
    • C:\Users\Admin\AppData\Local\Temp\vbc.exe
      C:\Users\Admin\AppData\Local\Temp\vbc.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:1032

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\vbc.exe

    Filesize

    1.1MB

    MD5

    34aa912defa18c2c129f1e09d75c1d7e

    SHA1

    9c3046324657505a30ecd9b1fdb46c05bde7d470

    SHA256

    6df94b7fa33f1b87142adc39b3db0613fc520d9e7a5fd6a5301dd7f51f8d0386

    SHA512

    d1ea9368f5d7166180612fd763c87afb647d088498887961f5e7fb0a10f4a808bd5928e8a3666d70ff794093c51ecca8816f75dd47652fd4eb23dce7f9aa1f98

  • \Users\Admin\AppData\Local\Temp\vbc.exe

    Filesize

    1.1MB

    MD5

    34aa912defa18c2c129f1e09d75c1d7e

    SHA1

    9c3046324657505a30ecd9b1fdb46c05bde7d470

    SHA256

    6df94b7fa33f1b87142adc39b3db0613fc520d9e7a5fd6a5301dd7f51f8d0386

    SHA512

    d1ea9368f5d7166180612fd763c87afb647d088498887961f5e7fb0a10f4a808bd5928e8a3666d70ff794093c51ecca8816f75dd47652fd4eb23dce7f9aa1f98

  • memory/884-55-0x0000000074460000-0x0000000074A0B000-memory.dmp

    Filesize

    5.7MB

  • memory/884-64-0x0000000074460000-0x0000000074A0B000-memory.dmp

    Filesize

    5.7MB

  • memory/884-54-0x00000000762D1000-0x00000000762D3000-memory.dmp

    Filesize

    8KB

  • memory/1032-58-0x0000000000400000-0x00000000004B5000-memory.dmp

    Filesize

    724KB

  • memory/1032-61-0x0000000000400000-0x00000000004B5000-memory.dmp

    Filesize

    724KB

  • memory/1032-60-0x0000000000400000-0x00000000004B5000-memory.dmp

    Filesize

    724KB

  • memory/1032-65-0x0000000000400000-0x00000000004B5000-memory.dmp

    Filesize

    724KB

  • memory/1032-57-0x0000000000400000-0x00000000004B5000-memory.dmp

    Filesize

    724KB

  • memory/1032-67-0x0000000000400000-0x00000000004B5000-memory.dmp

    Filesize

    724KB

  • memory/1032-68-0x0000000000400000-0x00000000004B5000-memory.dmp

    Filesize

    724KB

  • memory/1032-69-0x0000000000400000-0x00000000004B5000-memory.dmp

    Filesize

    724KB

  • memory/1032-70-0x0000000000400000-0x00000000004B5000-memory.dmp

    Filesize

    724KB

  • memory/1032-71-0x0000000000400000-0x00000000004B5000-memory.dmp

    Filesize

    724KB