Overview

overview

10

Static

static

b57f46aae5...PDF.js

windows7-x64

10

b57f46aae5...PDF.js

windows10-2004-x64

10

Sharing

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General

  • Target

    b57f46aae59e5b141af36a0e5598cb7b.PDF.js

  • Size

    856KB

  • Sample

    221205-kngxdsgf4v

  • MD5

    b57f46aae59e5b141af36a0e5598cb7b

  • SHA1

    d7c37a169fd2399d44b6330d8c459f5edd0151dd

  • SHA256

    15c52aa78fef0b66472f35c92e2778fcc726762e4f648ea8b027074f4d13fe46

  • SHA512

    040321fa3f3db208587af428bcc2643e36b941eaaea788c86c1e380168b35790c735cc09bbe29305feb1612bd9673e239007a728a7aa388427a7fa34235eb6f1

  • SSDEEP

    12288:5F+J0rvOJnnLrRoIalxPZu2o0iZTbSX7/QCFxweyve:+JGrhu5qVGve

Score
10/10
remcosvjw0rmremotehostcollectionevasionpersistenceratspywarestealertrojanworm

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

84.21.172.33:5763

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    uac.exe

  • copy_folder

    Remcos

  • delete_file

    false

  • hide_file

    true

  • 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-AG7QM3

  • 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

      b57f46aae59e5b141af36a0e5598cb7b.PDF.js

    • Size

      856KB

    • MD5

      b57f46aae59e5b141af36a0e5598cb7b

    • SHA1

      d7c37a169fd2399d44b6330d8c459f5edd0151dd

    • SHA256

      15c52aa78fef0b66472f35c92e2778fcc726762e4f648ea8b027074f4d13fe46

    • SHA512

      040321fa3f3db208587af428bcc2643e36b941eaaea788c86c1e380168b35790c735cc09bbe29305feb1612bd9673e239007a728a7aa388427a7fa34235eb6f1

    • SSDEEP

      12288:5F+J0rvOJnnLrRoIalxPZu2o0iZTbSX7/QCFxweyve:+JGrhu5qVGve

    Score
    10/10
    remcosvjw0rmremotehostcollectionevasionpersistenceratspywarestealertrojanworm

    • Remcos

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

      ratremcos

    • UAC bypass

      evasiontrojan

    • Vjw0rm

      Vjw0rm is a remote access trojan written in JavaScript.

      trojanwormvjw0rm

    • NirSoft MailPassView

      Password recovery tool for various email clients

    • NirSoft WebBrowserPassView

      Password recovery tool for various web browsers

    • Nirsoft

    • 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

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

      spywarestealer

    • Accesses Microsoft Outlook accounts

      collection

    • 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

Bypass User Account Control

1
T1088

Defense Evasion

Bypass User Account Control

1
T1088

Disabling Security Tools

1
T1089

Modify Registry

3
T1112

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Data from Local System

1
T1005

Email Collection

1
T1114

Exfiltration

Command and Control

Impact

Tasks