Overview

overview

10

Static

static

10

cb2641aa83...18.exe

windows7-x64

10

cb2641aa83...18.exe

windows10-2004-x64

10

Sharing

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General

  • Target
    cb2641aa837e88ff4ccfbf3b63433f50_JaffaCakes118
  • Size 253KB
  • Sample240830-s9p4wsshpm
  • SHA256 81e0a5bccf4405e1172f3ab2efd7b992112bb6e67e1ae2414ed487f7a9d55604
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
darkcometguest16discoveryevasionpersistencerattrojanupx

Malware Config

Extracted

Family

  • darkcomet

Botnet

  • Guest16

C2

  • dasdsa.ddns.net:27015

  • dasdsa.ddns.net:1604

Mutex

  • DC_MUTEX-N7R03RK

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    wpkD70dQhSjV

  • install

    true

  • offline_keylogger

    false

  • persistence

    false

  • reg_key

    MicroUpdate

Targets

    • Target
      cb2641aa837e88ff4ccfbf3b63433f50_JaffaCakes118
    • Size 253KB
    • SHA256 81e0a5bccf4405e1172f3ab2efd7b992112bb6e67e1ae2414ed487f7a9d55604
    • MD5 SHA1 SHA512 SSDEEP
    Score
    10/10
    darkcometguest16discoveryevasionpersistencerattrojanupx

    • Darkcomet

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

      trojanratdarkcomet

    • Modifies WinLogon for persistence

      persistence

    • Modifies firewall policy service

      evasion

    • Modifies security service

      evasion

    • Windows security bypass

      evasiontrojan

    • Disables RegEdit via registry modification

      evasion

    • Disables Task Manager via registry modification

      evasion

    • Sets file to hidden

      Modifies file attributes to stop it showing in Explorer etc.

      evasion

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • UPX packed file

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

      upx

    • Windows security modification

      evasiontrojan

    • Adds Run key to start application

      persistence

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Winlogon Helper DLL

1
T1547.004

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

2
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Winlogon Helper DLL

1
T1547.004

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Defense Evasion

Hide Artifacts

2
T1564

Hidden Files and Directories

2
T1564.001

Impair Defenses

3
T1562

Disable or Modify System Firewall

1
T1562.004

Disable or Modify Tools

2
T1562.001

Modify Registry

7
T1112

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks