Analysis

  • max time kernel
    149s
  • max time network
    128s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    09-08-2024 21:16

General

  • Target

    8393b965a4159ab6400d46899c943af1_JaffaCakes118.exe

  • Size

    234KB

  • MD5

    8393b965a4159ab6400d46899c943af1

  • SHA1

    13f2b5f18cbb2ea6165bcca033d3d17880965a71

  • SHA256

    a243b4d437e5381ce22852e3bc6f6621dfaf8a618526d37d4e763a43c5634c07

  • SHA512

    8f5146b3ff5e35e8b9376a568da405bb74f89da8d36d7faba79a32281b25f57e6fa6b93a3b22ab4bc36041025e902e45ffcca18865e74a732d5ff30b9040483e

  • SSDEEP

    6144:9hqN2gp8/DlfS7kuF8EZZY0W+DBOeq0S98JS9ToS:9h8eDlK7iEFVhq0SeU9ToS

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

127.0.0.1:1604

Mutex

DC_MUTEX-F54S21D

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    VzpgEE93M5fr

  • install

    true

  • offline_keylogger

    true

  • persistence

    false

  • reg_key

    MicroUpdate

Signatures

  • Darkcomet

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

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • UPX packed file 12 IoCs

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

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious use of AdjustPrivilegeToken 48 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8393b965a4159ab6400d46899c943af1_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\8393b965a4159ab6400d46899c943af1_JaffaCakes118.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Checks computer location settings
    • Adds Run key to start application
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3328
    • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
      "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:1448
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4336,i,8293235976513689021,7261015831736501466,262144 --variations-seed-version --mojo-platform-channel-handle=4324 /prefetch:8
    1⤵
      PID:220

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe

      Filesize

      234KB

      MD5

      8393b965a4159ab6400d46899c943af1

      SHA1

      13f2b5f18cbb2ea6165bcca033d3d17880965a71

      SHA256

      a243b4d437e5381ce22852e3bc6f6621dfaf8a618526d37d4e763a43c5634c07

      SHA512

      8f5146b3ff5e35e8b9376a568da405bb74f89da8d36d7faba79a32281b25f57e6fa6b93a3b22ab4bc36041025e902e45ffcca18865e74a732d5ff30b9040483e

    • memory/1448-22-0x0000000000400000-0x00000000004BB000-memory.dmp

      Filesize

      748KB

    • memory/1448-21-0x0000000000400000-0x00000000004BB000-memory.dmp

      Filesize

      748KB

    • memory/1448-32-0x0000000000400000-0x00000000004BB000-memory.dmp

      Filesize

      748KB

    • memory/1448-16-0x00000000007E0000-0x00000000007E1000-memory.dmp

      Filesize

      4KB

    • memory/1448-17-0x0000000000400000-0x00000000004BB000-memory.dmp

      Filesize

      748KB

    • memory/1448-19-0x0000000000400000-0x00000000004BB000-memory.dmp

      Filesize

      748KB

    • memory/1448-20-0x00000000007E0000-0x00000000007E1000-memory.dmp

      Filesize

      4KB

    • memory/1448-27-0x0000000000400000-0x00000000004BB000-memory.dmp

      Filesize

      748KB

    • memory/1448-26-0x0000000000400000-0x00000000004BB000-memory.dmp

      Filesize

      748KB

    • memory/1448-23-0x0000000000400000-0x00000000004BB000-memory.dmp

      Filesize

      748KB

    • memory/1448-24-0x0000000000400000-0x00000000004BB000-memory.dmp

      Filesize

      748KB

    • memory/3328-0-0x0000000000400000-0x00000000004BB000-memory.dmp

      Filesize

      748KB

    • memory/3328-1-0x0000000000990000-0x0000000000991000-memory.dmp

      Filesize

      4KB

    • memory/3328-14-0x0000000000400000-0x00000000004BB000-memory.dmp

      Filesize

      748KB