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

  • MD5

    ae5b94abf028388af1454ed76806cc6f

  • SHA1

    ef013c7eec6fc6c14ccd414b5eb87abf1476566a

  • SHA256

    f286d2b89eaebb2e1e6e23a44bc92dae7c058348286810549f4c7514c9ea61ad

  • SHA512

    b88c3c160b68b0bdc03780a6848001aef7baa5532b815071eb4f26ff1caa87f71b2401b0c507db5389d14517310bae758aaa17f6fe7aa508f2de38cdbcac1fe2

  • SSDEEP

    49152:TL51ahTWxFOlm43he+4Xkt1i1XkIZ9fm5urK7olHgnIxQQ6brit:p8h8ME4xr461ckZPoxgnsSa

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

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Downloads

  • C:\Config.Msi\f7668a4.rbs

    Filesize

    9KB

    MD5

    bf538549c30c6adf7d565318b4cc9085

    SHA1

    678c6d3fe94d8eb3734d1a7d14e3f781fed76b2d

    SHA256

    efb4b73ddbc445505bd37d123b9f538b0df76746ee25cf52ed179b28ca846b78

    SHA512

    7e32236767076a16f6d8c4a1e7c2417eb04479d083cc144777504350ce148532c1c2dfad97a4a68ac2842f693f84817b7695c9b0bf0c7c29179ed67bfdd23af2

  • C:\Users\Admin\AppData\Local\Temp\18f21ac8

    Filesize

    1.0MB

    MD5

    6df3dbaa83e1468127bb90e20683ea6f

    SHA1

    2ae50f10798527ef27bd776218395a43ddfc10ae

    SHA256

    4eb57519ed61f66fd9e7e914d010ff02d5de4d75cf4a1fb314ecfcc689c779a7

    SHA512

    d455faa13c9d0a5669d1f7d0879f9620af6a30d0bac188b5a0059de124799379e19d28cd75e91cb2bb5e9c88bc1cb52dc51bf40ce0d1f18542a832156633ff16

  • C:\Users\Admin\AppData\Roaming\IXXinstall\EHttpSrv.exe

    Filesize

    20KB

    MD5

    9329ba45c8b97485926a171e34c2abb8

    SHA1

    20118bc0432b4e8b3660a4b038b20ca28f721e5c

    SHA256

    effa6fcb8759375b4089ccf61202a5c63243f4102872e64e3eb0a1bdc2727659

    SHA512

    0af06b5495142ba0632a46be0778a7bd3d507e9848b3159436aa504536919abbcacd8b740ef4b591296e86604b49e0642fee2c273a45e44b41a80f91a1d52acc

  • C:\Users\Admin\AppData\Roaming\IXXinstall\MFC80U.DLL

    Filesize

    1.0MB

    MD5

    686b224b4987c22b153fbb545fee9657

    SHA1

    684ee9f018fbb0bbf6ffa590f3782ba49d5d096c

    SHA256

    a2ac851f35066c2f13a7452b7a9a3fee05bfb42907ae77a6b85b212a2227fc36

    SHA512

    44d65db91ceea351d2b6217eaa27358dbc2ed27c9a83d226b59aecb336a9252b60aec5ce5e646706a2af5631d5ee0f721231ec751e97e47bbbc32d5f40908875

  • C:\Users\Admin\AppData\Roaming\IXXinstall\audiogram.tif

    Filesize

    877KB

    MD5

    5124236fd955464317fbb1f344a1d2f2

    SHA1

    fe3a91e252f1dc3c3b4980ade7157369ea6f5097

    SHA256

    ed1389002cdf96c9b54de35b6e972166ee3296d628943fd594a383e674c5cba6

    SHA512

    2b2ac23244b16f936ef9a4049586f58c809fcc4391a56390cc5db2e8d96140001e0b977680ed1d8b0ab9c410e865a880209e22add8d42e563dc40bc91236b252

  • C:\Users\Admin\AppData\Roaming\IXXinstall\http_dll.dll

    Filesize

    1.9MB

    MD5

    fe47e255c704b20cb20c8ed93ec94d47

    SHA1

    ed7d26624b3cfaa72cf7d3bc59d26845fb84247a

    SHA256

    b0d665cb466e10ef90e1d79a39cb655ebe785d0cefc074f7a22d04936b681879

    SHA512

    55813a4b755773f98991b47294fed03b23d5bee9af3ef98727b7345882fe0d9976546f46847fbc30119e7c62ce7ee8ae21f54065922041cf8d42364e607bc1c0

  • C:\Windows\Installer\f7668a2.msi

    Filesize

    2.9MB

    MD5

    ae5b94abf028388af1454ed76806cc6f

    SHA1

    ef013c7eec6fc6c14ccd414b5eb87abf1476566a

    SHA256

    f286d2b89eaebb2e1e6e23a44bc92dae7c058348286810549f4c7514c9ea61ad

    SHA512

    b88c3c160b68b0bdc03780a6848001aef7baa5532b815071eb4f26ff1caa87f71b2401b0c507db5389d14517310bae758aaa17f6fe7aa508f2de38cdbcac1fe2

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

    Filesize

    1.5MB

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

    Filesize

    1.5MB

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

    Filesize

    1.7MB

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

    Filesize

    528KB

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

    Filesize

    16.4MB

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

    Filesize

    528KB

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

    Filesize

    528KB

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

    Filesize

    528KB

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

    Filesize

    528KB

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

    Filesize

    528KB

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

    Filesize

    528KB

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

    Filesize

    528KB

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

    Filesize

    528KB

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

    Filesize

    528KB

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

    Filesize

    528KB

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

    Filesize

    528KB

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

    Filesize

    1.5MB

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

    Filesize

    1.7MB