Overview

overview

10

Static

static

d020b04931...b9.exe

windows7_x64

10

d020b04931...b9.exe

windows10-2004_x64

10

Sharing

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General

  • Target

    d020b049313ec9b24c829f81a315cac63f00000a22ff60e5f433ef0a1ad589b9

  • Size

    3.5MB

  • Sample

    220502-se18nsaadj

  • MD5

    8143e4662e68907b624633013fff7ca3

  • SHA1

    9a0fc7a71a26289e37298ff5a297bdb11b976e0f

  • SHA256

    d020b049313ec9b24c829f81a315cac63f00000a22ff60e5f433ef0a1ad589b9

  • SHA512

    cb0d55a9cfe65953471d3368122b3f590bb553bff7d92b3ce2802b75227de1d419dfab83ab6f7bdcf9fba0995ad3cd43fbea7c4bd2c4fcf44fadacf3cc4657cd

Score
10/10
darkcomet2020nov1evasionpersistencerattrojan

Malware Config

Extracted

Family

darkcomet

Botnet

2020NOV1

C2

sandyclark255.hopto.org:35887

Mutex

DC_MUTEX-6XT818D

Attributes
  • InstallPath

    excelsl.exe

  • gencode

    n7asq0Dbu7D2

  • install

    true

  • offline_keylogger

    true

  • password

    hhhhhh

  • persistence

    true

  • reg_key

    office

Targets

    • Target

      d020b049313ec9b24c829f81a315cac63f00000a22ff60e5f433ef0a1ad589b9

    • Size

      3.5MB

    • MD5

      8143e4662e68907b624633013fff7ca3

    • SHA1

      9a0fc7a71a26289e37298ff5a297bdb11b976e0f

    • SHA256

      d020b049313ec9b24c829f81a315cac63f00000a22ff60e5f433ef0a1ad589b9

    • SHA512

      cb0d55a9cfe65953471d3368122b3f590bb553bff7d92b3ce2802b75227de1d419dfab83ab6f7bdcf9fba0995ad3cd43fbea7c4bd2c4fcf44fadacf3cc4657cd

    Score
    10/10
    darkcomet2020nov1persistencerattrojanevasion

    • Darkcomet

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

      trojanratdarkcomet

    • Modifies WinLogon for persistence

      persistence

    • Drops file in Drivers directory

    • Executes dropped EXE

    • Modifies Windows Firewall

      evasion

    • Checks computer location settings

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

    • Drops startup file

    • Loads dropped DLL

    • Adds Run key to start application

      persistence

    • Drops desktop.ini file(s)

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1
T1004

Modify Existing Service

1
T1031

Registry Run Keys / Startup Folder

1
T1060

Privilege Escalation

Defense Evasion

Modify Registry

3
T1112

Credential Access

Discovery

Query Registry

2
T1012

System Information Discovery

3
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Tasks