Analysis

  • max time kernel
    16s
  • max time network
    119s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    29/04/2024, 13:31

General

  • Target

    2024-04-29_6b188f5813927070e5af5e9d694988ec_cryptolocker.exe

  • Size

    32KB

  • MD5

    6b188f5813927070e5af5e9d694988ec

  • SHA1

    5e8e1f12c003169f50b64f751b6105aa361eff28

  • SHA256

    c5186a2af6da9a77837b63c90133184aa927f1268045333c3f69d5ae9a56e2f1

  • SHA512

    eb94f295bbfabaf0a013fbbfb67d0e440b3b20ecab46eb25ce24fee17dfe72cb2257c5e51134cb98c892de1721241b1b95e11b59a3a4235472768d49d5d1508b

  • SSDEEP

    384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznStEkcsgRi:b/yC4GyNM01GuQMNXw2PSjSKkcJRi

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Creates a large amount of network flows 1 TTPs

    This may indicate a network scan to discover remotely running services.

  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of UnmapMainImage 2 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-04-29_6b188f5813927070e5af5e9d694988ec_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-29_6b188f5813927070e5af5e9d694988ec_cryptolocker.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of UnmapMainImage
    • Suspicious use of WriteProcessMemory
    PID:3060
    • C:\Users\Admin\AppData\Local\Temp\retln.exe
      "C:\Users\Admin\AppData\Local\Temp\retln.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of UnmapMainImage
      PID:2852

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • \Users\Admin\AppData\Local\Temp\retln.exe

    Filesize

    33KB

    MD5

    9d197a39ffcb6fdf4331213f87965bbc

    SHA1

    b64b366582c3f123334f3a09815f5eadffeda9c7

    SHA256

    76859ead6ee0944ffcf2b223e7b662d014b3b7ad67f2670be1ee092a0023a0b9

    SHA512

    99ebd8f1a8fa35933e74775181963034cc1410ae2b33ff5cbfaef0702c1640b1e09b7fca40ce369445ed68ba04ee4183824912fa1a0962fb8b744387109724c5

  • memory/2852-23-0x00000000003E0000-0x00000000003E6000-memory.dmp

    Filesize

    24KB

  • memory/3060-0-0x0000000000280000-0x0000000000286000-memory.dmp

    Filesize

    24KB

  • memory/3060-1-0x0000000000400000-0x0000000000406000-memory.dmp

    Filesize

    24KB

  • memory/3060-8-0x0000000000280000-0x0000000000286000-memory.dmp

    Filesize

    24KB