Analysis

  • max time kernel
    452s
  • max time network
    1178s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/05/2024, 15:47

General

  • Target
    avp.msi
  • Size 1.4MB
  • Sample240503-s8jwgsdc95
  • SHA256 dcae57ec4b69236146f744c143c42cc8bdac9da6e991904e6dbf67ec1179286a
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10

Malware Config

Signatures

  • SSLoad

    SSLoad Unpacked DLL payload.

  • Detects SSLoad Unpacked payload 1 IoCs
  • Blocklisted process makes network request 2 IoCs
  • Enumerates connected drives 3 TTPs 46 IoCs

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

  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops file in Windows directory 9 IoCs
  • Loads dropped DLL 9 IoCs
  • Checks SCSI registry key(s) 3 TTPs 5 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of WriteProcessMemory 8 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\avp.msi
    1⤵
    • Enumerates connected drives
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:4364
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Enumerates connected drives
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2472
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding B0FEF125D375A3D696A0A05789A3B589 C
      2⤵
      • Loads dropped DLL
      PID:1180
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:4180
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 87F9C1008400BA9455956C20DDD128A2
        2⤵
        • Blocklisted process makes network request
        • Loads dropped DLL
        PID:3048
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:1468

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          e576708.rbs

          • Path C:\Config.Msi\e576708.rbs
          • Size 1KB
          • SHA256 a5962f190f18ab6c61d70a0d08f86f9b6261d8b498befb7edc14239a109635f2
          • MD5 SHA1 SHA512

          MSI3B73.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\MSI3B73.tmp
          • Size 436KB
          • SHA256 426e6cf199a8268e8a7763ec3a4dd7add982b28c51d89ebea90ca792cbae14dd
          • MD5 SHA1 SHA512 SSDEEP

          forcedelctl.dll

          • Path C:\Users\Admin\AppData\Local\sharepoint\forcedelctl.dll
          • Size 956KB
          • SHA256 3bca1dcaef4430272b9029c9a4bc8be0d45ecff66e8de8679ed30d8afab00f6f
          • MD5 SHA1 SHA512 SSDEEP

          metadata-2

          • Path \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2
          • Size 23.7MB
          • SHA256 07a04caf1c8593e17c287efa93d7e0328b3dd6ffbcdfb30e7fc0ed3902b57f64
          • MD5 SHA1 SHA512 SSDEEP

          {719eb1cd-eb7f-4838-87fa-764ff4a505f7}_OnDiskSnapshotProp

          • Path \??\Volume{b97ed4d9-0000-0000-0000-d01200000000}\System Volume Information\SPP\OnlineMetadataCache\{719eb1cd-eb7f-4838-87fa-764ff4a505f7}_OnDiskSnapshotProp
          • Size 6KB
          • SHA256 56d829686dfed10fa4caac364818a45915344dbd1abfac1371514f9f6a78e5a3
          • MD5 SHA1 SHA512 SSDEEP

          memory/3048-45-0x0000000010000000-0x00000000100F9000-memory.dmp

          memory/3048-46-0x0000000003190000-0x0000000003203000-memory.dmp

          memory/3048-51-0x0000000010000000-0x00000000100F9000-memory.dmp

          memory/3048-52-0x0000000010000000-0x00000000100F9000-memory.dmp