Analysis

  • max time kernel
    298s
  • max time network
    299s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    24-10-2024 05:43

General

  • Target

    5702771896_AWB_20240902_225_20240902.exe

  • Size

    888KB

  • MD5

    fca7c052afe3a4de2e3d0ce5d500932c

  • SHA1

    1873d11a40c7a727762ba70780a43a810f168333

  • SHA256

    f85e3c3cace64f9432cc9588a77cb687cdca8378ec16334923849913632973ce

  • SHA512

    b6cc45932fe3b6f0042e26609ad3a114872f044a667fbcdcd619e01380e03c77f203d88cbce79a09997ad645eb6f1a7d86217c1ec0f0667d8cc995cc28bb988c

  • SSDEEP

    12288:k9QQTGWRJxjcm4Z2dDnD7V1xk3ZCB8w6unDxGlxqHkZ084Y5bzY9n8+q8tiB/h5:FQTGWPxImi21Tx1J6uDxaxqHg7098+6n

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

23.227.202.197:2404

Attributes
  • audio_folder

    MicRecords

  • audio_path

    ApplicationPath

  • 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-QPTXAI

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Guloader,Cloudeye

    A shellcode based downloader first seen in 2020.

  • Remcos

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

  • Detected Nirsoft tools 8 IoCs

    Free utilities often used by attackers which can steal passwords, product keys, etc.

  • NirSoft MailPassView 3 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 3 IoCs

    Password recovery tool for various web browsers

  • Loads dropped DLL 2 IoCs
  • Reads user/profile data of web browsers 3 TTPs

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

  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Suspicious use of SetThreadContext 4 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.

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: MapViewOfSection 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 18 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\5702771896_AWB_20240902_225_20240902.exe
    "C:\Users\Admin\AppData\Local\Temp\5702771896_AWB_20240902_225_20240902.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:2756
    • C:\Users\Admin\AppData\Local\Temp\5702771896_AWB_20240902_225_20240902.exe
      "C:\Users\Admin\AppData\Local\Temp\5702771896_AWB_20240902_225_20240902.exe"
      2⤵
      • Suspicious use of NtCreateThreadExHideFromDebugger
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2652
      • C:\Users\Admin\AppData\Local\Temp\5702771896_AWB_20240902_225_20240902.exe
        C:\Users\Admin\AppData\Local\Temp\5702771896_AWB_20240902_225_20240902.exe /stext "C:\Users\Admin\AppData\Local\Temp\fusngzvyedgexbkwpgap"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        PID:2108
      • C:\Users\Admin\AppData\Local\Temp\5702771896_AWB_20240902_225_20240902.exe
        C:\Users\Admin\AppData\Local\Temp\5702771896_AWB_20240902_225_20240902.exe /stext "C:\Users\Admin\AppData\Local\Temp\qwfxhkfaslyjzpghyqnqslp"
        3⤵
        • Accesses Microsoft Outlook accounts
        • System Location Discovery: System Language Discovery
        PID:1304
      • C:\Users\Admin\AppData\Local\Temp\5702771896_AWB_20240902_225_20240902.exe
        C:\Users\Admin\AppData\Local\Temp\5702771896_AWB_20240902_225_20240902.exe /stext "C:\Users\Admin\AppData\Local\Temp\sqlqicquntqwjvulpbzkvykgtq"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        PID:1272

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\remcos\logs.dat

    Filesize

    144B

    MD5

    bf70c538372bea698c8ee68784f944fe

    SHA1

    30e7b529fa307e23d690838c25c07551534316cf

    SHA256

    ffb690fcccbfd22df99a2d339841b9eb11824d640abeaa26e2cd418dca99fce6

    SHA512

    2c0e7554dd4ecedc37b530b4b6a83f2b0eb155f1a293223267a957fdc6e2fe03757eb0a4819c7ac10489e38491c1bdb27784b6ab148d3abea9fd34478012908c

  • C:\Users\Admin\AppData\Local\Temp\fusngzvyedgexbkwpgap

    Filesize

    2B

    MD5

    f3b25701fe362ec84616a93a45ce9998

    SHA1

    d62636d8caec13f04e28442a0a6fa1afeb024bbb

    SHA256

    b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

    SHA512

    98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

  • \Users\Admin\AppData\Local\Temp\nstF4AD.tmp\System.dll

    Filesize

    11KB

    MD5

    9625d5b1754bc4ff29281d415d27a0fd

    SHA1

    80e85afc5cccd4c0a3775edbb90595a1a59f5ce0

    SHA256

    c2f405d7402f815d0c3fadd9a50f0bbbb1bab9aa38fe347823478a2587299448

    SHA512

    dce52b640897c2e8dbfd0a1472d5377fa91fb9cf1aeff62604d014bccbe5b56af1378f173132abeb0edd18c225b9f8f5e3d3e72434aed946661e036c779f165b

  • memory/1272-36-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/1272-42-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/1272-39-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/1272-38-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/1272-37-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/1304-54-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/1304-29-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/1304-27-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/1304-34-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/1304-31-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2108-26-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/2108-33-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/2108-32-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/2108-35-0x00000000773E0000-0x0000000077589000-memory.dmp

    Filesize

    1.7MB

  • memory/2108-30-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/2108-47-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/2652-59-0x0000000031F70000-0x0000000031F89000-memory.dmp

    Filesize

    100KB

  • memory/2652-82-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2652-20-0x00000000773E0000-0x0000000077589000-memory.dmp

    Filesize

    1.7MB

  • memory/2652-142-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2652-50-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2652-139-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2652-55-0x0000000031F70000-0x0000000031F89000-memory.dmp

    Filesize

    100KB

  • memory/2652-136-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2652-58-0x0000000031F70000-0x0000000031F89000-memory.dmp

    Filesize

    100KB

  • memory/2652-61-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2652-64-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2652-133-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2652-67-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2652-70-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2652-73-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2652-76-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2652-79-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2652-21-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2652-85-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2652-88-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2652-91-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2652-100-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2652-103-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2652-106-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2652-109-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2652-112-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2652-118-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2652-121-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2652-124-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2652-127-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2652-130-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2756-16-0x0000000003EC0000-0x0000000004E5E000-memory.dmp

    Filesize

    15.6MB

  • memory/2756-18-0x00000000773E0000-0x0000000077589000-memory.dmp

    Filesize

    1.7MB

  • memory/2756-17-0x00000000773E1000-0x00000000774E2000-memory.dmp

    Filesize

    1.0MB

  • memory/2756-19-0x0000000003EC0000-0x0000000004E5E000-memory.dmp

    Filesize

    15.6MB