Analysis

  • max time kernel
    150s
  • max time network
    131s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
  • submitted
    18/02/2025, 13:59

General

  • Target
    d.msi
  • Size 2.9MB
  • Sample250218-rawlyssnx2
  • SHA256 f286d2b89eaebb2e1e6e23a44bc92dae7c058348286810549f4c7514c9ea61ad
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • remcos

Botnet
  • v2

C2
  • 185.157.162.126:1995

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

    qsdazeazd-EL00KX

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Detects HijackLoader (aka IDAT Loader) 1 IoCs
  • HijackLoader

    HijackLoader is a multistage loader first seen in 2023.

  • Hijackloader family
  • Remcos

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

  • Remcos family
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates connected drives 3 TTPs 46 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Suspicious use of SetThreadContext 2 IoCs
  • Drops file in Windows directory 10 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 5 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Event Triggered Execution: Installer Packages 2 TTPs 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

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

  • Modifies data under HKEY_USERS 43 IoCs
  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Windows\system32\msiexec.exe
    msiexec.exe /I C:\Users\Admin\AppData\Local\Temp\d.msi
    1⤵
    • Enumerates connected drives
    • Event Triggered Execution: Installer Packages
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:2380
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Adds Run key to start application
    • Enumerates connected drives
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2800
    • C:\Users\Admin\AppData\Roaming\IXXinstall\EHttpSrv.exe
      "C:\Users\Admin\AppData\Roaming\IXXinstall\EHttpSrv.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Executes dropped EXE
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of WriteProcessMemory
      PID:1284
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\SysWOW64\cmd.exe
        3⤵
        • Suspicious use of SetThreadContext
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of WriteProcessMemory
        PID:2300
        • C:\Users\Admin\AppData\Roaming\IXXinstall\EHttpSrv.exe
          C:\Users\Admin\AppData\Roaming\IXXinstall\EHttpSrv.exe
          4⤵
          • Loads dropped DLL
          • System Location Discovery: System Language Discovery
          PID:1912
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2716
  • C:\Windows\system32\DrvInst.exe
    DrvInst.exe "1" "200" "STORAGE\VolumeSnapshot\HarddiskVolumeSnapshot19" "" "" "61530dda3" "0000000000000000" "000000000000038C" "00000000000005D4"
    1⤵
    • Drops file in Windows directory
    • Modifies data under HKEY_USERS
    • Suspicious use of AdjustPrivilegeToken
    PID:3012

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        f7668a4.rbs

        • Path C:\Config.Msi\f7668a4.rbs
        • Size 9KB
        • SHA256 efb4b73ddbc445505bd37d123b9f538b0df76746ee25cf52ed179b28ca846b78
        • MD5 SHA1 SHA512 SSDEEP

        18f21ac8

        • Path C:\Users\Admin\AppData\Local\Temp\18f21ac8
        • Size 1.0MB
        • SHA256 4eb57519ed61f66fd9e7e914d010ff02d5de4d75cf4a1fb314ecfcc689c779a7
        • MD5 SHA1 SHA512 SSDEEP

        EHttpSrv.exe

        • Path C:\Users\Admin\AppData\Roaming\IXXinstall\EHttpSrv.exe
        • Size 20KB
        • SHA256 effa6fcb8759375b4089ccf61202a5c63243f4102872e64e3eb0a1bdc2727659
        • MD5 SHA1 SHA512 SSDEEP

        MFC80U.DLL

        • Path C:\Users\Admin\AppData\Roaming\IXXinstall\MFC80U.DLL
        • Size 1.0MB
        • SHA256 a2ac851f35066c2f13a7452b7a9a3fee05bfb42907ae77a6b85b212a2227fc36
        • MD5 SHA1 SHA512 SSDEEP

        audiogram.tif

        • Path C:\Users\Admin\AppData\Roaming\IXXinstall\audiogram.tif
        • Size 877KB
        • SHA256 ed1389002cdf96c9b54de35b6e972166ee3296d628943fd594a383e674c5cba6
        • MD5 SHA1 SHA512 SSDEEP

        http_dll.dll

        • Path C:\Users\Admin\AppData\Roaming\IXXinstall\http_dll.dll
        • Size 1.9MB
        • SHA256 b0d665cb466e10ef90e1d79a39cb655ebe785d0cefc074f7a22d04936b681879
        • MD5 SHA1 SHA512 SSDEEP

        f7668a2.msi

        • Path C:\Windows\Installer\f7668a2.msi
        • Size 2.9MB
        • SHA256 f286d2b89eaebb2e1e6e23a44bc92dae7c058348286810549f4c7514c9ea61ad
        • MD5 SHA1 SHA512 SSDEEP

        memory/1284-38-0x0000000074850000-0x00000000749C4000-memory.dmp

        memory/1284-39-0x0000000074850000-0x00000000749C4000-memory.dmp

        memory/1912-94-0x0000000077210000-0x00000000773B9000-memory.dmp

        memory/1912-111-0x00000000001C0000-0x0000000000244000-memory.dmp

        memory/1912-92-0x0000000072790000-0x00000000737F2000-memory.dmp

        memory/1912-119-0x00000000001C0000-0x0000000000244000-memory.dmp

        memory/1912-95-0x00000000001C0000-0x0000000000244000-memory.dmp

        memory/1912-99-0x00000000001C0000-0x0000000000244000-memory.dmp

        memory/1912-110-0x00000000001C0000-0x0000000000244000-memory.dmp

        memory/1912-118-0x00000000001C0000-0x0000000000244000-memory.dmp

        memory/1912-112-0x00000000001C0000-0x0000000000244000-memory.dmp

        memory/1912-113-0x00000000001C0000-0x0000000000244000-memory.dmp

        memory/1912-114-0x00000000001C0000-0x0000000000244000-memory.dmp

        memory/1912-115-0x00000000001C0000-0x0000000000244000-memory.dmp

        memory/1912-116-0x00000000001C0000-0x0000000000244000-memory.dmp

        memory/1912-117-0x00000000001C0000-0x0000000000244000-memory.dmp

        memory/2300-89-0x0000000074850000-0x00000000749C4000-memory.dmp

        memory/2300-42-0x0000000077210000-0x00000000773B9000-memory.dmp