Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13-08-2024 12:04

General

  • Target

    Facturas_pdf.exe

  • Size

    910KB

  • MD5

    129ab29e55efb205471261bc48380372

  • SHA1

    75670ebbf86906138538caad68b5a75f17097be3

  • SHA256

    322c8e0ba72b41a9ee9ebdeeb1b1d71cefd9ed9674e285efed105c0918834b24

  • SHA512

    8020ed1d32fce5d9931da0e52b501c985de294c323a3d70a1f3873642f1a323f79479d555ddb5c2991d68c4300cbb95607e7582f42213080798a8d9de78a70e9

  • SSDEEP

    24576:qzKGObd+rcjuV/B1mV4uhB4tqyJy70oRXr85ABIxWD:qzKGOorcc8Q5k70o5g58Ixc

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

192.3.243.155:7643

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

    false

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-C9YEJ8

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

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

  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

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

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Uses the VBS compiler for execution 1 TTPs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Facturas_pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\Facturas_pdf.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2340
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\Facturas_pdf.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3436
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\kkUfsLDbd.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4184
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\kkUfsLDbd" /XML "C:\Users\Admin\AppData\Local\Temp\tmpB49A.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:1076
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:212

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\remcos\logs.dat

    Filesize

    144B

    MD5

    2e4fa6e8883484ec864af0f02bf698bf

    SHA1

    8fca08e1a778f3063b6456c89e73ab903f49ab47

    SHA256

    6701e49fe7e687db4e9fabb6ec1603908872e27f9107d94743ac226e5a2ef6d0

    SHA512

    cc5174f7d27baaff45d02610298f48f1f8a5f6e174476e28c9387ffa3cecc56d47ced11190814fe00c7a762641ca684c6da82eaa5288e56778cdb6fdfea8e44b

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ezktwhds.txg.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\AppData\Local\Temp\tmpB49A.tmp

    Filesize

    1KB

    MD5

    2a9c0b15b25ea666bc995d14a2d0d8f6

    SHA1

    f44a7c92f75edc17a38432a716ff455b35491895

    SHA256

    ba4d317467ec8967ed2479fa04ce8755923690705467b1441f0997f82739becd

    SHA512

    fb7f3bb03973b7679a25f8a2719ec0935a9d14332dee6fee143a4c78d88640855d6e35a5777a720afc76545507443983acfa5c04bcc80d941ca8e761def1ae09

  • memory/212-109-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/212-134-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/212-60-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/212-24-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/212-27-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/212-59-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/212-58-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/212-33-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/212-133-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/212-35-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/212-125-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/212-118-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/212-117-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/212-110-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/212-101-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/212-62-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/212-100-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/212-22-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/212-126-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/212-106-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/212-32-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/212-29-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2340-34-0x0000000074FAE000-0x0000000074FAF000-memory.dmp

    Filesize

    4KB

  • memory/2340-2-0x0000000005E40000-0x00000000063E4000-memory.dmp

    Filesize

    5.6MB

  • memory/2340-1-0x0000000000EB0000-0x0000000000F9A000-memory.dmp

    Filesize

    936KB

  • memory/2340-42-0x0000000074FA0000-0x0000000075750000-memory.dmp

    Filesize

    7.7MB

  • memory/2340-5-0x0000000005A40000-0x0000000005A4A000-memory.dmp

    Filesize

    40KB

  • memory/2340-7-0x0000000005DB0000-0x0000000005DC6000-memory.dmp

    Filesize

    88KB

  • memory/2340-3-0x0000000005980000-0x0000000005A12000-memory.dmp

    Filesize

    584KB

  • memory/2340-9-0x000000000C3F0000-0x000000000C48C000-memory.dmp

    Filesize

    624KB

  • memory/2340-8-0x0000000009290000-0x0000000009350000-memory.dmp

    Filesize

    768KB

  • memory/2340-6-0x0000000005D90000-0x0000000005DAE000-memory.dmp

    Filesize

    120KB

  • memory/2340-4-0x0000000074FA0000-0x0000000075750000-memory.dmp

    Filesize

    7.7MB

  • memory/2340-0-0x0000000074FAE000-0x0000000074FAF000-memory.dmp

    Filesize

    4KB

  • memory/3436-91-0x00000000072A0000-0x00000000072AE000-memory.dmp

    Filesize

    56KB

  • memory/3436-97-0x0000000074FA0000-0x0000000075750000-memory.dmp

    Filesize

    7.7MB

  • memory/3436-75-0x0000000006F20000-0x0000000006FC3000-memory.dmp

    Filesize

    652KB

  • memory/3436-74-0x0000000006EB0000-0x0000000006ECE000-memory.dmp

    Filesize

    120KB

  • memory/3436-63-0x0000000006ED0000-0x0000000006F02000-memory.dmp

    Filesize

    200KB

  • memory/3436-77-0x0000000007070000-0x000000000708A000-memory.dmp

    Filesize

    104KB

  • memory/3436-14-0x0000000002480000-0x00000000024B6000-memory.dmp

    Filesize

    216KB

  • memory/3436-76-0x00000000076C0000-0x0000000007D3A000-memory.dmp

    Filesize

    6.5MB

  • memory/3436-88-0x00000000070E0000-0x00000000070EA000-memory.dmp

    Filesize

    40KB

  • memory/3436-89-0x00000000072F0000-0x0000000007386000-memory.dmp

    Filesize

    600KB

  • memory/3436-90-0x0000000007270000-0x0000000007281000-memory.dmp

    Filesize

    68KB

  • memory/3436-15-0x0000000004F50000-0x0000000005578000-memory.dmp

    Filesize

    6.2MB

  • memory/3436-16-0x0000000074FA0000-0x0000000075750000-memory.dmp

    Filesize

    7.7MB

  • memory/3436-17-0x0000000074FA0000-0x0000000075750000-memory.dmp

    Filesize

    7.7MB

  • memory/3436-18-0x0000000074FA0000-0x0000000075750000-memory.dmp

    Filesize

    7.7MB

  • memory/3436-64-0x0000000075820000-0x000000007586C000-memory.dmp

    Filesize

    304KB

  • memory/3436-36-0x0000000005730000-0x0000000005A84000-memory.dmp

    Filesize

    3.3MB

  • memory/4184-57-0x0000000006A20000-0x0000000006A6C000-memory.dmp

    Filesize

    304KB

  • memory/4184-56-0x00000000064F0000-0x000000000650E000-memory.dmp

    Filesize

    120KB

  • memory/4184-25-0x0000000005530000-0x0000000005596000-memory.dmp

    Filesize

    408KB

  • memory/4184-98-0x0000000074FA0000-0x0000000075750000-memory.dmp

    Filesize

    7.7MB

  • memory/4184-26-0x0000000005D90000-0x0000000005DF6000-memory.dmp

    Filesize

    408KB

  • memory/4184-21-0x0000000074FA0000-0x0000000075750000-memory.dmp

    Filesize

    7.7MB

  • memory/4184-20-0x0000000074FA0000-0x0000000075750000-memory.dmp

    Filesize

    7.7MB

  • memory/4184-94-0x0000000007B30000-0x0000000007B38000-memory.dmp

    Filesize

    32KB

  • memory/4184-93-0x0000000007B50000-0x0000000007B6A000-memory.dmp

    Filesize

    104KB

  • memory/4184-92-0x0000000007A50000-0x0000000007A64000-memory.dmp

    Filesize

    80KB

  • memory/4184-23-0x0000000005410000-0x0000000005432000-memory.dmp

    Filesize

    136KB

  • memory/4184-78-0x0000000075820000-0x000000007586C000-memory.dmp

    Filesize

    304KB