Overview

overview

10

Static

static

fbd46ea22a...cc4.js

windows7-x64

10

fbd46ea22a...cc4.js

windows10-2004-x64

10

Sharing

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General

  • Target

    fbd46ea22af9ed39fbbd66a1c6ac9cc4.js.vir

  • Size

    850KB

  • Sample

    221129-pywkraac95

  • MD5

    e6bd21e0286aa3155c31cc7283338b91

  • SHA1

    a4a3e1b22e3b28aee3fa3c2ec42e20c17c564430

  • SHA256

    cbbb702f3317d7c2e99e511e7e48939c724423b5e38a15612d91864a70a3e707

  • SHA512

    ad79732bcce4dd262509f0550fad32e840c2e07d90f5daae835b3b24994ec9acd2d3a1196316cd1714d5e266c985ced287ea469356239271b3365045fc4d2dad

  • SSDEEP

    12288:KxUjeXvsDRhdpT0O+FT9524AKKBTncFPpw8xnMymrJN:X9MJf2nGPwrJN

Score
10/10
remcosvjw0rmremotehostpersistencerattrojanworm

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

45.139.105.174:3111

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    remcos.exe

  • copy_folder

    Remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    true

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-XI5CH7

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    Remcos

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Targets

    • Target

      fbd46ea22af9ed39fbbd66a1c6ac9cc4.js.vir

    • Size

      850KB

    • MD5

      e6bd21e0286aa3155c31cc7283338b91

    • SHA1

      a4a3e1b22e3b28aee3fa3c2ec42e20c17c564430

    • SHA256

      cbbb702f3317d7c2e99e511e7e48939c724423b5e38a15612d91864a70a3e707

    • SHA512

      ad79732bcce4dd262509f0550fad32e840c2e07d90f5daae835b3b24994ec9acd2d3a1196316cd1714d5e266c985ced287ea469356239271b3365045fc4d2dad

    • SSDEEP

      12288:KxUjeXvsDRhdpT0O+FT9524AKKBTncFPpw8xnMymrJN:X9MJf2nGPwrJN

    Score
    10/10
    remcosvjw0rmremotehostpersistencerattrojanworm

    • Remcos

      Remcos is a closed-source remote control and surveillance software.

      ratremcos

    • Vjw0rm

      Vjw0rm is a remote access trojan written in JavaScript.

      trojanwormvjw0rm

    • Blocklisted process makes network request

    • Executes dropped EXE

    • 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

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1
T1060

Privilege Escalation

Defense Evasion

Modify Registry

1
T1112

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Tasks