Overview

overview

10

Static

static

PO839-DOC8...df.exe

windows7_x64

10

PO839-DOC8...df.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    160s
  • max time network
    183s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    20-05-2022 22:16

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General

  • Target

    PO839-DOC83475348-834_pdf.exe

  • Size

    169KB

  • MD5

    f0a88db6d16630640775a733efd9527f

  • SHA1

    88fc7c4275f93c404efa073a80ce61e0e7f3ee5a

  • SHA256

    ff3eb81477b36ac2239b623085961439379064929b20c4a69f72cb266adece83

  • SHA512

    af00550e84d345289e6d1751f42be955a3d60a2e5a4f442764dfbb044b7e0c8d775e8af89c0d217bd8023d4a4739b77600ba9365f47cde5086afead6180f6ddf

Score
10/10
remcosxxxxxxxxxxxxevasionrat

Malware Config

Extracted

Family

remcos

Version

2.5.1 Pro

Botnet

xxxxxxxxxxxx

C2

109.169.89.116:2021

Attributes
  • audio_folder

    MicRecords

  • audio_path

    %AppData%

  • 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

    false

  • install_path

    %AppData%

  • keylog_crypt

    false

  • keylog_file

    s.sex

  • keylog_flag

    false

  • keylog_folder

    ssssss

  • keylog_path

    %UserProfile%

  • mouse_option

    false

  • mutex

    fuckhere-M9W1LK

  • 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

  • take_screenshot_title

    wikipedia;solitaire;

Signatures

  • Remcos

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

    ratremcos
  • Looks for VirtualBox Guest Additions in registry 2 TTPs
    evasion
  • Looks for VMWare Tools registry key 2 TTPs
    evasion
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Maps connected drives based on registry 3 TTPs 2 IoCs

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

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

    persistence
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\PO839-DOC83475348-834_pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\PO839-DOC83475348-834_pdf.exe"
    1⤵
    • Checks BIOS information in registry
    • Checks computer location settings
    • Maps connected drives based on registry
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3728
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\stsVISqZItxBpu" /XML "C:\Users\Admin\AppData\Local\Temp\tmpBDD2.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:64
    • C:\Users\Admin\AppData\Local\Temp\PO839-DOC83475348-834_pdf.exe
      "{path}"
      2⤵
        PID:3684
      • C:\Users\Admin\AppData\Local\Temp\PO839-DOC83475348-834_pdf.exe
        "{path}"
        2⤵
        • Suspicious use of SetWindowsHookEx
        PID:2160

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Initial Access

    Execution

    Scheduled Task

    1
    T1053

    Persistence

    Scheduled Task

    1
    T1053

    Privilege Escalation

    Scheduled Task

    1
    T1053

    Defense Evasion

    Virtualization/Sandbox Evasion

    2
    T1497

    Credential Access

    Discovery

    Query Registry

    5
    T1012

    Virtualization/Sandbox Evasion

    2
    T1497

    System Information Discovery

    4
    T1082

    Peripheral Device Discovery

    1
    T1120

    Lateral Movement

    Collection

    Exfiltration

    Command and Control

    Impact

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\tmpBDD2.tmp
      Filesize

      1KB

      MD5

      e2b5f6235394096062eddfbe6024a2f4

      SHA1

      0046c28d9503063caa8cd17835b1219ca83c3405

      SHA256

      fb5895ef01ebb4d803588573694bfe28ebd57ac2faadf0373fd0d58c9cfc3aa9

      SHA512

      834776519ed0e73e743e6a5428e0dc145988ddb0b5d9e17aab5ee842fe399db201775e0f33c7f11d3f378397dfe8406d62cee6064b87b996d234942929128d0e

      Download Submit
    • memory/64-135-0x0000000000000000-mapping.dmp
      Download
    • memory/2160-138-0x0000000000000000-mapping.dmp
      Download
    • memory/2160-139-0x0000000000400000-0x0000000000420000-memory.dmp
      Filesize

      128KB

      Download
    • memory/2160-141-0x0000000000400000-0x0000000000420000-memory.dmp
      Filesize

      128KB

      Download
    • memory/2160-142-0x0000000000400000-0x0000000000420000-memory.dmp
      Filesize

      128KB

      Download
    • memory/3684-137-0x0000000000000000-mapping.dmp
      Download
    • memory/3728-130-0x00000000000D0000-0x0000000000100000-memory.dmp
      Filesize

      192KB

      Download
    • memory/3728-131-0x0000000004C00000-0x0000000004C92000-memory.dmp
      Filesize

      584KB

      Download
    • memory/3728-132-0x0000000005280000-0x000000000531C000-memory.dmp
      Filesize

      624KB

      Download
    • memory/3728-133-0x00000000059D0000-0x0000000005F74000-memory.dmp
      Filesize

      5.6MB

      Download
    • memory/3728-134-0x0000000005490000-0x00000000054F6000-memory.dmp
      Filesize

      408KB

      Download