Overview

overview

10

Static

static

c682113153...0a.exe

windows7-x64

10

c682113153...0a.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    163s
  • max time network
    188s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30-11-2022 04:36

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General

  • Target

    c6821131539c018d83a39e9524d869cd8ed204741d1cba8322daf4bd12a0350a.exe

  • Size

    826KB

  • MD5

    794ffbba826644ebaba383ce35ff6e4f

  • SHA1

    7103bddea0d9ed714c87cd4f2fcbe27fdb2c7073

  • SHA256

    c6821131539c018d83a39e9524d869cd8ed204741d1cba8322daf4bd12a0350a

  • SHA512

    6eb675ea4667d740d1c0735662a31991ceee7475147e6acd625d50829ac3aadec6a6ee98368ab290fe64ba20c02920470eeae8ec8ad2045174f217cd8bdfc4fe

  • SSDEEP

    12288:ZuoHPyzPHlRPoR/dnMMrmZOx8UAyDi0AaqUDMp9fUWuCQbhOmzXhWzqPxgJdnI/q:9yzP6dMMS4xF5KU8Crwmzne3nuTax

Score
10/10
darkcomethackerevasionpersistencerattrojanupx

Malware Config

Extracted

Family

darkcomet

Botnet

hacker

C2

vrnl.no-ip.org:1604

Mutex

DC_MUTEX-X7L1TR6

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    Pr1EvmBuofnm

  • install

    true

  • offline_keylogger

    true

  • persistence

    true

  • reg_key

    MicroUpdate

Signatures

  • Darkcomet

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

    trojanratdarkcomet
  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
    persistence
  • Modifies firewall policy service 2 TTPs 3 IoCs
    evasion
  • Modifies security service 2 TTPs 1 IoCs
    evasion
  • Windows security bypass 2 TTPs 1 IoCs
    evasiontrojan
  • Executes dropped EXE 1 IoCs
  • UPX packed file 5 IoCs

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

    upx
  • Checks BIOS information in registry 2 TTPs 4 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Windows security modification 2 TTPs 1 IoCs
    evasiontrojan
  • Adds Run key to start application 2 TTPs 2 IoCs
    persistence
  • Drops file in System32 directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 14 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Enumerates system info in registry 2 TTPs 2 IoCs
  • Modifies registry class 1 IoCs
  • 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\c6821131539c018d83a39e9524d869cd8ed204741d1cba8322daf4bd12a0350a.exe
    "C:\Users\Admin\AppData\Local\Temp\c6821131539c018d83a39e9524d869cd8ed204741d1cba8322daf4bd12a0350a.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Checks BIOS information in registry
    • Checks computer location settings
    • Adds Run key to start application
    • Drops file in System32 directory
    • Checks processor information in registry
    • Enumerates system info in registry
    • Modifies registry class
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4992
    • C:\Windows\SysWOW64\MSDCSC\msdcsc.exe
      "C:\Windows\system32\MSDCSC\msdcsc.exe"
      2⤵
      • Modifies firewall policy service
      • Modifies security service
      • Windows security bypass
      • Executes dropped EXE
      • Checks BIOS information in registry
      • Windows security modification
      • Adds Run key to start application
      • Checks processor information in registry
      • Enumerates system info in registry
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:3192

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1
T1004

Modify Existing Service

2
T1031

Registry Run Keys / Startup Folder

1
T1060

Privilege Escalation

Defense Evasion

Modify Registry

6
T1112

Disabling Security Tools

2
T1089

Credential Access

Discovery

Query Registry

4
T1012

System Information Discovery

5
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

  • C:\Windows\SysWOW64\MSDCSC\msdcsc.exe
    Filesize

    826KB

    MD5

    794ffbba826644ebaba383ce35ff6e4f

    SHA1

    7103bddea0d9ed714c87cd4f2fcbe27fdb2c7073

    SHA256

    c6821131539c018d83a39e9524d869cd8ed204741d1cba8322daf4bd12a0350a

    SHA512

    6eb675ea4667d740d1c0735662a31991ceee7475147e6acd625d50829ac3aadec6a6ee98368ab290fe64ba20c02920470eeae8ec8ad2045174f217cd8bdfc4fe

    Download Submit
  • C:\Windows\SysWOW64\MSDCSC\msdcsc.exe
    Filesize

    826KB

    MD5

    794ffbba826644ebaba383ce35ff6e4f

    SHA1

    7103bddea0d9ed714c87cd4f2fcbe27fdb2c7073

    SHA256

    c6821131539c018d83a39e9524d869cd8ed204741d1cba8322daf4bd12a0350a

    SHA512

    6eb675ea4667d740d1c0735662a31991ceee7475147e6acd625d50829ac3aadec6a6ee98368ab290fe64ba20c02920470eeae8ec8ad2045174f217cd8bdfc4fe

    Download Submit
  • memory/3192-142-0x0000000000400000-0x0000000000581000-memory.dmp
    Filesize

    1.5MB

    Download
  • memory/3192-138-0x0000000000000000-mapping.dmp
    Download
  • memory/3192-143-0x00000000007C0000-0x00000000007D1000-memory.dmp
    Filesize

    68KB

    Download
  • memory/3192-145-0x0000000000400000-0x0000000000581000-memory.dmp
    Filesize

    1.5MB

    Download
  • memory/4992-135-0x0000000000400000-0x0000000000581000-memory.dmp
    Filesize

    1.5MB

    Download
  • memory/4992-136-0x0000000000400000-0x0000000000581000-memory.dmp
    Filesize

    1.5MB

    Download
  • memory/4992-137-0x00000000007C0000-0x00000000007D1000-memory.dmp
    Filesize

    68KB

    Download
  • memory/4992-134-0x00000000007C0000-0x00000000007D1000-memory.dmp
    Filesize

    68KB

    Download
  • memory/4992-133-0x00000000007C0000-0x00000000007D1000-memory.dmp
    Filesize

    68KB

    Download
  • memory/4992-132-0x0000000000400000-0x0000000000581000-memory.dmp
    Filesize

    1.5MB

    Download
  • memory/4992-144-0x00000000007C0000-0x00000000007D1000-memory.dmp
    Filesize

    68KB

    Download