Analysis

  • max time kernel
    149s
  • max time network
    137s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240611-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26-06-2024 20:59

General

  • Target

    136e24d2e40c6bb49efec2c643f2dbe4_JaffaCakes118.exe

  • Size

    398KB

  • MD5

    136e24d2e40c6bb49efec2c643f2dbe4

  • SHA1

    0eb613aee9bd84a91045b01df6e80639b3072497

  • SHA256

    d14dc0c863a908b364ddb07dce87c1936d7d6f50f341f1ba72c83342bcdc5a66

  • SHA512

    9bcda7a8a883d2aad638ba6e27e315dea9ad3d69659473a8610169179c06635b04d71c3c950257c951e222280ecdd3e66548906f2aa22bf9f30d31187bf95c20

  • SSDEEP

    12288:r0eFWYP1stdJTFoKTV45jEJnp2/FB02fHdf:r0evStdEKTV45ss/L9f

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

127.0.0.1:1604

Mutex

DC_MUTEX-TDUES14

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    kLFnMeH6GMti

  • install

    true

  • offline_keylogger

    true

  • password

    0123456789

  • persistence

    true

  • 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
  • Sets file to hidden 1 TTPs 1 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 48 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 59 IoCs
  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\136e24d2e40c6bb49efec2c643f2dbe4_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\136e24d2e40c6bb49efec2c643f2dbe4_JaffaCakes118.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2684
    • C:\Users\Admin\AppData\Local\Temp\136e24d2e40c6bb49efec2c643f2dbe4_JaffaCakes118.exe
      C:\Users\Admin\AppData\Local\Temp\136e24d2e40c6bb49efec2c643f2dbe4_JaffaCakes118.exe
      2⤵
      • Modifies WinLogon for persistence
      • Checks computer location settings
      • Adds Run key to start application
      • Drops file in Windows directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2044
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2820
        • C:\Windows\SysWOW64\attrib.exe
          attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
          4⤵
          • Sets file to hidden
          • Views/modifies file attributes
          PID:1676
      • C:\Windows\MSDCSC\msdcsc.exe
        "C:\Windows\MSDCSC\msdcsc.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:788
        • C:\Windows\MSDCSC\msdcsc.exe
          C:\Windows\MSDCSC\msdcsc.exe
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:4072
          • C:\Windows\SysWOW64\notepad.exe
            notepad
            5⤵
              PID:5060
    • 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=4460,i,16856304285138459032,14480077487839828721,262144 --variations-seed-version --mojo-platform-channel-handle=3456 /prefetch:8
      1⤵
        PID:832

      Network

      MITRE ATT&CK Matrix ATT&CK v13

      Persistence

      Boot or Logon Autostart Execution

      2
      T1547

      Registry Run Keys / Startup Folder

      1
      T1547.001

      Winlogon Helper DLL

      1
      T1547.004

      Privilege Escalation

      Boot or Logon Autostart Execution

      2
      T1547

      Registry Run Keys / Startup Folder

      1
      T1547.001

      Winlogon Helper DLL

      1
      T1547.004

      Defense Evasion

      Modify Registry

      2
      T1112

      Hide Artifacts

      2
      T1564

      Hidden Files and Directories

      2
      T1564.001

      Discovery

      Query Registry

      1
      T1012

      System Information Discovery

      2
      T1082

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Windows\MSDCSC\msdcsc.exe
        Filesize

        398KB

        MD5

        136e24d2e40c6bb49efec2c643f2dbe4

        SHA1

        0eb613aee9bd84a91045b01df6e80639b3072497

        SHA256

        d14dc0c863a908b364ddb07dce87c1936d7d6f50f341f1ba72c83342bcdc5a66

        SHA512

        9bcda7a8a883d2aad638ba6e27e315dea9ad3d69659473a8610169179c06635b04d71c3c950257c951e222280ecdd3e66548906f2aa22bf9f30d31187bf95c20

      • memory/788-36-0x0000000000400000-0x00000000006DBC10-memory.dmp
        Filesize

        2.9MB

      • memory/788-23-0x0000000000400000-0x00000000006DBC10-memory.dmp
        Filesize

        2.9MB

      • memory/2044-3-0x0000000000400000-0x00000000004B5000-memory.dmp
        Filesize

        724KB

      • memory/2044-4-0x0000000000400000-0x00000000004B5000-memory.dmp
        Filesize

        724KB

      • memory/2044-5-0x0000000000400000-0x00000000004B5000-memory.dmp
        Filesize

        724KB

      • memory/2044-6-0x0000000000400000-0x00000000004B5000-memory.dmp
        Filesize

        724KB

      • memory/2044-7-0x0000000000400000-0x00000000004B5000-memory.dmp
        Filesize

        724KB

      • memory/2044-25-0x0000000000400000-0x00000000004B5000-memory.dmp
        Filesize

        724KB

      • memory/2684-9-0x0000000000400000-0x00000000006DBC10-memory.dmp
        Filesize

        2.9MB

      • memory/2684-0-0x0000000000400000-0x00000000006DBC10-memory.dmp
        Filesize

        2.9MB

      • memory/4072-34-0x0000000000400000-0x00000000004B5000-memory.dmp
        Filesize

        724KB

      • memory/4072-42-0x0000000000400000-0x00000000004B5000-memory.dmp
        Filesize

        724KB

      • memory/4072-32-0x0000000000400000-0x00000000004B5000-memory.dmp
        Filesize

        724KB

      • memory/4072-31-0x0000000000400000-0x00000000004B5000-memory.dmp
        Filesize

        724KB

      • memory/4072-52-0x0000000000400000-0x00000000004B5000-memory.dmp
        Filesize

        724KB

      • memory/4072-39-0x0000000000400000-0x00000000004B5000-memory.dmp
        Filesize

        724KB

      • memory/4072-38-0x0000000000400000-0x00000000004B5000-memory.dmp
        Filesize

        724KB

      • memory/4072-40-0x0000000000400000-0x00000000004B5000-memory.dmp
        Filesize

        724KB

      • memory/4072-41-0x0000000000400000-0x00000000004B5000-memory.dmp
        Filesize

        724KB

      • memory/4072-35-0x0000000000400000-0x00000000004B5000-memory.dmp
        Filesize

        724KB

      • memory/4072-43-0x0000000000400000-0x00000000004B5000-memory.dmp
        Filesize

        724KB

      • memory/4072-44-0x0000000000400000-0x00000000004B5000-memory.dmp
        Filesize

        724KB

      • memory/4072-45-0x0000000000400000-0x00000000004B5000-memory.dmp
        Filesize

        724KB

      • memory/4072-46-0x0000000000400000-0x00000000004B5000-memory.dmp
        Filesize

        724KB

      • memory/4072-47-0x0000000000400000-0x00000000004B5000-memory.dmp
        Filesize

        724KB

      • memory/4072-48-0x0000000000400000-0x00000000004B5000-memory.dmp
        Filesize

        724KB

      • memory/4072-50-0x0000000000400000-0x00000000004B5000-memory.dmp
        Filesize

        724KB

      • memory/4072-51-0x0000000000400000-0x00000000004B5000-memory.dmp
        Filesize

        724KB

      • memory/5060-37-0x0000000000D60000-0x0000000000D61000-memory.dmp
        Filesize

        4KB