Analysis

  • max time kernel
    222s
  • max time network
    168s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    23-11-2022 18:54

General

  • Target

    85fdde2e17ec0b56ce564a98c6220745c6950f44932abe5dce5cba66605db2bc.exe

  • Size

    261KB

  • MD5

    4530a82649bd16a3a7baa70faa1caa50

  • SHA1

    f9ce0ceaa7bccf18ef23570e0d550d9b43e9e166

  • SHA256

    85fdde2e17ec0b56ce564a98c6220745c6950f44932abe5dce5cba66605db2bc

  • SHA512

    3721f299f303b8c040a43a020a09fb55ef412b59d597e1bc6b8a3e5bc886afc44859832693c45e6eef5ff0f5d83760f81bb78bb59c5b3c7d656f277b5b63fb30

  • SSDEEP

    6144:Hco4dnaXTsWxDcQHlemO9fRI6oh/h8oGWINlmR9wryQ:8PnaDskYaAmU66yh5GHD09AyQ

Malware Config

Extracted

Family

darkcomet

Botnet

hack

C2

bikaalov.noip.me:1604

Mutex

DC_MUTEX-7G2PFJD

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    tKukSM5w3M83

  • 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
  • Modifies firewall policy service 2 TTPs 3 IoCs
  • Windows security bypass 2 TTPs 1 IoCs
  • ASPack v2.12-2.42 5 IoCs

    Detects executables packed with ASPack v2.12-2.42

  • Executes dropped EXE 2 IoCs
  • UPX packed file 13 IoCs

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

  • Loads dropped DLL 2 IoCs
  • Windows security modification 2 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of AdjustPrivilegeToken 46 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\85fdde2e17ec0b56ce564a98c6220745c6950f44932abe5dce5cba66605db2bc.exe
    "C:\Users\Admin\AppData\Local\Temp\85fdde2e17ec0b56ce564a98c6220745c6950f44932abe5dce5cba66605db2bc.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:944
    • C:\Users\Admin\AppData\Local\Temp\85fdde2e17ec0b56ce564a98c6220745c6950f44932abe5dce5cba66605db2bc.exe
      2⤵
      • Modifies WinLogon for persistence
      • Loads dropped DLL
      • Adds Run key to start application
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:904
      • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
        "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:1768
        • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
          4⤵
          • Modifies firewall policy service
          • Windows security bypass
          • Executes dropped EXE
          • Windows security modification
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          PID:1684

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Winlogon Helper DLL

1
T1004

Modify Existing Service

1
T1031

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

5
T1112

Disabling Security Tools

2
T1089

Discovery

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

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

    261KB

    MD5

    4530a82649bd16a3a7baa70faa1caa50

    SHA1

    f9ce0ceaa7bccf18ef23570e0d550d9b43e9e166

    SHA256

    85fdde2e17ec0b56ce564a98c6220745c6950f44932abe5dce5cba66605db2bc

    SHA512

    3721f299f303b8c040a43a020a09fb55ef412b59d597e1bc6b8a3e5bc886afc44859832693c45e6eef5ff0f5d83760f81bb78bb59c5b3c7d656f277b5b63fb30

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

    261KB

    MD5

    4530a82649bd16a3a7baa70faa1caa50

    SHA1

    f9ce0ceaa7bccf18ef23570e0d550d9b43e9e166

    SHA256

    85fdde2e17ec0b56ce564a98c6220745c6950f44932abe5dce5cba66605db2bc

    SHA512

    3721f299f303b8c040a43a020a09fb55ef412b59d597e1bc6b8a3e5bc886afc44859832693c45e6eef5ff0f5d83760f81bb78bb59c5b3c7d656f277b5b63fb30

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

    261KB

    MD5

    4530a82649bd16a3a7baa70faa1caa50

    SHA1

    f9ce0ceaa7bccf18ef23570e0d550d9b43e9e166

    SHA256

    85fdde2e17ec0b56ce564a98c6220745c6950f44932abe5dce5cba66605db2bc

    SHA512

    3721f299f303b8c040a43a020a09fb55ef412b59d597e1bc6b8a3e5bc886afc44859832693c45e6eef5ff0f5d83760f81bb78bb59c5b3c7d656f277b5b63fb30

  • \Users\Admin\Documents\MSDCSC\msdcsc.exe
    Filesize

    261KB

    MD5

    4530a82649bd16a3a7baa70faa1caa50

    SHA1

    f9ce0ceaa7bccf18ef23570e0d550d9b43e9e166

    SHA256

    85fdde2e17ec0b56ce564a98c6220745c6950f44932abe5dce5cba66605db2bc

    SHA512

    3721f299f303b8c040a43a020a09fb55ef412b59d597e1bc6b8a3e5bc886afc44859832693c45e6eef5ff0f5d83760f81bb78bb59c5b3c7d656f277b5b63fb30

  • \Users\Admin\Documents\MSDCSC\msdcsc.exe
    Filesize

    261KB

    MD5

    4530a82649bd16a3a7baa70faa1caa50

    SHA1

    f9ce0ceaa7bccf18ef23570e0d550d9b43e9e166

    SHA256

    85fdde2e17ec0b56ce564a98c6220745c6950f44932abe5dce5cba66605db2bc

    SHA512

    3721f299f303b8c040a43a020a09fb55ef412b59d597e1bc6b8a3e5bc886afc44859832693c45e6eef5ff0f5d83760f81bb78bb59c5b3c7d656f277b5b63fb30

  • memory/904-62-0x0000000000400000-0x00000000004B7000-memory.dmp
    Filesize

    732KB

  • memory/904-59-0x0000000000400000-0x00000000004B7000-memory.dmp
    Filesize

    732KB

  • memory/904-64-0x0000000075551000-0x0000000075553000-memory.dmp
    Filesize

    8KB

  • memory/904-65-0x0000000000400000-0x00000000004B7000-memory.dmp
    Filesize

    732KB

  • memory/904-66-0x0000000000400000-0x00000000004B7000-memory.dmp
    Filesize

    732KB

  • memory/904-67-0x0000000000400000-0x00000000004B7000-memory.dmp
    Filesize

    732KB

  • memory/904-68-0x0000000000400000-0x00000000004B7000-memory.dmp
    Filesize

    732KB

  • memory/904-90-0x0000000000400000-0x00000000004B7000-memory.dmp
    Filesize

    732KB

  • memory/904-61-0x00000000004B57E0-mapping.dmp
  • memory/904-85-0x0000000004EC0000-0x0000000004EC8000-memory.dmp
    Filesize

    32KB

  • memory/904-60-0x0000000000400000-0x00000000004B7000-memory.dmp
    Filesize

    732KB

  • memory/904-56-0x0000000000400000-0x00000000004B7000-memory.dmp
    Filesize

    732KB

  • memory/904-57-0x0000000000400000-0x00000000004B7000-memory.dmp
    Filesize

    732KB

  • memory/944-63-0x0000000000400000-0x0000000000408000-memory.dmp
    Filesize

    32KB

  • memory/1684-81-0x00000000004B57E0-mapping.dmp
  • memory/1684-88-0x0000000000400000-0x00000000004B7000-memory.dmp
    Filesize

    732KB

  • memory/1684-91-0x0000000000400000-0x00000000004B7000-memory.dmp
    Filesize

    732KB

  • memory/1684-92-0x0000000000400000-0x00000000004B7000-memory.dmp
    Filesize

    732KB

  • memory/1684-93-0x0000000000400000-0x00000000004B7000-memory.dmp
    Filesize

    732KB

  • memory/1768-83-0x0000000000400000-0x0000000000408000-memory.dmp
    Filesize

    32KB

  • memory/1768-71-0x0000000000000000-mapping.dmp