Overview

overview

10

Static

static

10

8bebd7cc51...71.exe

windows7-x64

10

8bebd7cc51...71.exe

windows10-2004-x64

10

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General

  • Target

    8bebd7cc515650c4af50bf56987bbc5959b742647333be47b810f2c7442eac71.zip

  • Size

    45KB

  • Sample

    240413-jtj39scb92

  • MD5

    39a7d44d708c1b2dfe5332b4ba5990f0

  • SHA1

    70425dd36ae44be3faa75006c2a9529b08e26f59

  • SHA256

    935716802c63b7c25763115df1baf648d140a7f2d2a6850ce9e4a1e612f23f8f

  • SHA512

    013c404e7fe6c84622aa64abaa9202616d56c903b924a6517a13a358fdae1d09f00fda1922bb2516beac3dc9b612bc5c806403c14d95ac7b2299a90e8da65566

  • SSDEEP

    768:AWsvLQIbc1zfQu880avJmV2bxGBc2nAy3e677ZGFVBoKe/mi1zYrqEaIA:A3IQuBPGB5nPzgvLUmi1z8ql

Score
10/10
remcoshostevasionpersistencerattrojan

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

C2

185.241.208.113:2404

Attributes
  • audio_folder

    audio

  • audio_path

    %AppData%

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    5

  • copy_file

    JavaUpdate.exe

  • copy_folder

    JavaUpdater

  • delete_file

    true

  • hide_file

    true

  • hide_keylog_file

    false

  • install_flag

    true

  • install_path

    %AppData%

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    Java

  • keylog_path

    %AppData%

  • mouse_option

    false

  • mutex

    remcos_fcstxhoeka

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screens

  • screenshot_path

    %AppData%

  • screenshot_time

    1

  • startup_value

    Java Updater

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Targets

    • Target

      8bebd7cc515650c4af50bf56987bbc5959b742647333be47b810f2c7442eac71.exe

    • Size

      100KB

    • MD5

      a6a0219b8024a45895471d2373df0705

    • SHA1

      e59e9f9290097c827263db55b8896c0401234d1f

    • SHA256

      8bebd7cc515650c4af50bf56987bbc5959b742647333be47b810f2c7442eac71

    • SHA512

      c1bd154651600eec5b9bb4bdd70b99fa3a6850139d7581ece14998b3a4c2228f8c20db294d2d2366fc18935ae2cf8adbcb561f4f280cf4d841cbd30b5c0b894c

    • SSDEEP

      3072:vhzYTGWVvJ8f2v1TbPzuMsIFSHNThy+JP/P67ro:vhzOv2fM13jsIFSHNT7P/P63o

    Score
    10/10
    remcoshostevasionpersistencerattrojan

    • Modifies WinLogon for persistence

      persistence

    • Remcos

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

      ratremcos

    • UAC bypass

      evasiontrojan

    • Checks computer location settings

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

    • Deletes itself

    • Executes dropped EXE

    • Loads dropped DLL

    • Adds Run key to start application

      persistence

    • Modifies WinLogon

      persistence

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

3
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Winlogon Helper DLL

2
T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

3
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Winlogon Helper DLL

2
T1547.004

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Defense Evasion

Modify Registry

5
T1112

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Impair Defenses

1
T1562

Disable or Modify Tools

1
T1562.001

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Remote System Discovery

1
T1018

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Tasks