Overview

overview

10

Static

static

10

darknj.exe

windows7_x64

10

darknj.exe

windows10_x64

10

Sharing

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General

  • Target

    darknj.exe

  • Size

    692KB

  • Sample

    210721-tfdsjmhy4n

  • MD5

    2308cedb77f66e4a821d57e8ee1e08a5

  • SHA1

    42ddaf9aef498e366fecdad6b2acbbe9d9d0d47c

  • SHA256

    8eb3881ba7d320c0760042529414e8ee87b8bfc648c34d87dd36ed854b0c8b7b

  • SHA512

    ad91461e7e5747a8815015c910f84720bd90cf520a39dcc01cd75c5a8840a8beda9969de2c5e8778cac5d863bf11fcb6c0c946c81b4a3ed43792ca0202264f77

Score
10/10
darkcometnjratggnyan catevasionpersistencerattrojan

Malware Config

Extracted

Family

darkcomet

Botnet

GG

C2

secret92.ddns.net:82

Mutex

DC_MUTEX-A6ET8RQ

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    oqyLUmi211Cb

  • install

    true

  • offline_keylogger

    true

  • persistence

    true

  • reg_key

    MicroUpdate

Extracted

Family

njrat

Version

0.7NC

Botnet

NYAN CAT

C2

secret92.ddns.net:8082

Mutex

0c3398f1458

Attributes
  • reg_key

    0c3398f1458

  • splitter

    @!#&^%$

Targets

    • Target

      darknj.exe

    • Size

      692KB

    • MD5

      2308cedb77f66e4a821d57e8ee1e08a5

    • SHA1

      42ddaf9aef498e366fecdad6b2acbbe9d9d0d47c

    • SHA256

      8eb3881ba7d320c0760042529414e8ee87b8bfc648c34d87dd36ed854b0c8b7b

    • SHA512

      ad91461e7e5747a8815015c910f84720bd90cf520a39dcc01cd75c5a8840a8beda9969de2c5e8778cac5d863bf11fcb6c0c946c81b4a3ed43792ca0202264f77

    Score
    10/10
    darkcometnjratggnyan catevasionpersistencerattrojan

    • Darkcomet

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

      trojanratdarkcomet

    • Modifies WinLogon for persistence

      persistence

    • Modifies security service

      evasion

    • Windows security bypass

      evasiontrojan

    • njRAT/Bladabindi

      Widely used RAT written in .NET.

      trojannjrat

    • Executes dropped EXE

    • 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.

    • Deletes itself

    • Loads dropped DLL

    • Windows security modification

      evasiontrojan

    • Adds Run key to start application

      persistence
    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1
T1004

Modify Existing Service

1
T1031

Hidden Files and Directories

2
T1158

Registry Run Keys / Startup Folder

1
T1060

Privilege Escalation

Defense Evasion

Modify Registry

6
T1112

Disabling Security Tools

2
T1089

Hidden Files and Directories

2
T1158

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Tasks