Overview

overview

10

Static

static

1

COSCO-BL-D...92.exe

windows7-x64

10

COSCO-BL-D...92.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    COSCO-BL-DOCREF0019938839492.exe

  • Size

    933KB

  • Sample

    240521-w5kv6aeb84

  • MD5

    e8341c132b421d6f4458a85f83c022b5

  • SHA1

    843ea31ff92c4a04aee01734fc8accce11d6677a

  • SHA256

    e7ac92245b62ac27b3a14658cfb1c72f39ef91055a79cdc9c41e4574f6bd5a46

  • SHA512

    abfadf2e1ce64a6c15abdc36682f744b45d4731a92a92f0f7e2cec4117cd30862f6d870b68bd3e7786ab088a73ae795b2dc29e6599eae42f551366500eefaeb6

  • SSDEEP

    24576:gWF0HP0YLI9UWaxsthnwxUulx6oOgYum75zLoRHTbhK:gHP0YUu9stYDlogrWfoRzbhK

Score
10/10
remcoswkevasionexecutionrattrojan

Malware Config

Extracted

Family

remcos

Botnet

WK

C2

embargogo237.duckdns.org:10521

embargogo2378.duckdns.org:10522
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

    true

  • install_flag

    false

  • keylog_crypt

    true

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    iexplorer

  • keylog_path

    %AppData%

  • mouse_option

    false

  • mutex

    zmt-C10PFT

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Targets

    • Target

      COSCO-BL-DOCREF0019938839492.exe

    • Size

      933KB

    • MD5

      e8341c132b421d6f4458a85f83c022b5

    • SHA1

      843ea31ff92c4a04aee01734fc8accce11d6677a

    • SHA256

      e7ac92245b62ac27b3a14658cfb1c72f39ef91055a79cdc9c41e4574f6bd5a46

    • SHA512

      abfadf2e1ce64a6c15abdc36682f744b45d4731a92a92f0f7e2cec4117cd30862f6d870b68bd3e7786ab088a73ae795b2dc29e6599eae42f551366500eefaeb6

    • SSDEEP

      24576:gWF0HP0YLI9UWaxsthnwxUulx6oOgYum75zLoRHTbhK:gHP0YUu9stYDlogrWfoRzbhK

    Score
    10/10
    remcoswkevasionexecutionrattrojan

    • Remcos

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

      ratremcos

    • UAC bypass

      evasiontrojan

    • Windows security bypass

      evasiontrojan

    • Looks for VirtualBox Guest Additions in registry

      evasion

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

      execution

    • Looks for VMWare Tools registry key

      evasion

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Checks computer location settings

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

    • Uses the VBS compiler for execution

    • Windows security modification

      evasiontrojan

    • Checks whether UAC is enabled

      evasiontrojan

    • Maps connected drives based on registry

      Disk information is often read in order to detect sandboxing environments.

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Command and Scripting Interpreter

1
T1059

PowerShell

1
T1059.001

Scripting

1
T1064

Persistence

Privilege Escalation

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Defense Evasion

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Impair Defenses

3
T1562

Disable or Modify Tools

3
T1562.001

Modify Registry

4
T1112

Virtualization/Sandbox Evasion

2
T1497

Scripting

1
T1064

Credential Access

Discovery

Query Registry

5
T1012

Virtualization/Sandbox Evasion

2
T1497

System Information Discovery

5
T1082

Peripheral Device Discovery

1
T1120

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Tasks