Analysis

  • max time kernel
    149s
  • max time network
    132s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    17-02-2025 03:56

General

  • Target

    a326bbb242a11e0cd4155f58bcffa36b99487cf0d655359fd161e905577d8254.msi

  • Size

    2.9MB

  • MD5

    91e248c8a0b605eb3302dd8c036c3392

  • SHA1

    0877c798687043d14b7d4aeca03e3ed960ac1689

  • SHA256

    a326bbb242a11e0cd4155f58bcffa36b99487cf0d655359fd161e905577d8254

  • SHA512

    31efcbce7ea057ca7b6c6183097a7b367d4b93dfbe6f88fd4306ba3b7dd65b181dc8fd518b5de8c1f0b078578ae6cd268d5f710389dc99e9e55b33126ffc2539

  • SSDEEP

    49152:qL51ahTWxFOlm43he+4Xkt1i1XkIZ9fm5urK7olHgnIxQQ6brit:K8h8ME4xr461ckZPoxgnsSa

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\a326bbb242a11e0cd4155f58bcffa36b99487cf0d655359fd161e905577d8254.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:2860
    • 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:484
      • 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:1940
        • 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:1660
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:3008
  • C:\Windows\system32\DrvInst.exe
    DrvInst.exe "1" "200" "STORAGE\VolumeSnapshot\HarddiskVolumeSnapshot19" "" "" "61530dda3" "0000000000000000" "0000000000000594" "00000000000003A4"
    1⤵
    • Drops file in Windows directory
    • Modifies data under HKEY_USERS
    • Suspicious use of AdjustPrivilegeToken
    PID:2592

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Config.Msi\f7713c1.rbs

    Filesize

    10KB

    MD5

    71b987a39d10f731a2e59d0fa0dc3105

    SHA1

    c83ad6cb674f0d7265789a829eb2966671f7ea10

    SHA256

    f0dcc2cf344305428f2d43c57623b6776c93adddd4309a9ccaae5169b2bf2d60

    SHA512

    ee965e5ef64ce87df30fe76cd5de95b482e96adb382b7d9542e9793716e6e4c3834e990d10914bd3468319a17464183900ea97cac6f143e757430a0e4b20ad14

  • C:\Users\Admin\AppData\Local\Temp\2517d325

    Filesize

    1.0MB

    MD5

    bcc16008b7a152c2ddb8da4e7eccfe45

    SHA1

    05f1bed25c9e835b36c1b8398ac039abc3f427aa

    SHA256

    e03d1c4264231e2cf03e9e4c22af904e7477dce2dc3c367449629093a79c74c6

    SHA512

    c9178985b1bc1f309df765f07355f356737c9b575fbd57500e639982253f4ec90266d87dc86eaa9fbe1357d73aac4da6bf24f5ab6ab3c7ba02171303c0361d3c

  • 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\f7713bf.msi

    Filesize

    2.9MB

    MD5

    91e248c8a0b605eb3302dd8c036c3392

    SHA1

    0877c798687043d14b7d4aeca03e3ed960ac1689

    SHA256

    a326bbb242a11e0cd4155f58bcffa36b99487cf0d655359fd161e905577d8254

    SHA512

    31efcbce7ea057ca7b6c6183097a7b367d4b93dfbe6f88fd4306ba3b7dd65b181dc8fd518b5de8c1f0b078578ae6cd268d5f710389dc99e9e55b33126ffc2539

  • memory/484-38-0x0000000074350000-0x00000000744C4000-memory.dmp

    Filesize

    1.5MB

  • memory/484-39-0x0000000074350000-0x00000000744C4000-memory.dmp

    Filesize

    1.5MB

  • memory/1660-108-0x00000000001C0000-0x0000000000244000-memory.dmp

    Filesize

    528KB

  • memory/1660-92-0x0000000072300000-0x0000000073362000-memory.dmp

    Filesize

    16.4MB

  • memory/1660-94-0x0000000076D80000-0x0000000076F29000-memory.dmp

    Filesize

    1.7MB

  • memory/1660-95-0x00000000001C0000-0x0000000000244000-memory.dmp

    Filesize

    528KB

  • memory/1660-99-0x00000000001C0000-0x0000000000244000-memory.dmp

    Filesize

    528KB

  • memory/1660-109-0x00000000001C0000-0x0000000000244000-memory.dmp

    Filesize

    528KB

  • memory/1660-110-0x00000000001C0000-0x0000000000244000-memory.dmp

    Filesize

    528KB

  • memory/1660-111-0x00000000001C0000-0x0000000000244000-memory.dmp

    Filesize

    528KB

  • memory/1660-112-0x00000000001C0000-0x0000000000244000-memory.dmp

    Filesize

    528KB

  • memory/1660-115-0x00000000001C0000-0x0000000000244000-memory.dmp

    Filesize

    528KB

  • memory/1940-89-0x0000000074350000-0x00000000744C4000-memory.dmp

    Filesize

    1.5MB

  • memory/1940-42-0x0000000076D80000-0x0000000076F29000-memory.dmp

    Filesize

    1.7MB