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Analysis

  • max time kernel
    148s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/05/2024, 01:34

General

  • Target

    2024-05-28_65ee7bdc476e96f1292636a6831d37a9_cryptolocker.exe

  • Size

    62KB

  • MD5

    65ee7bdc476e96f1292636a6831d37a9

  • SHA1

    bba1a1380cc1d8dfd7be58f5bd1869f942ec1634

  • SHA256

    a6d01fa3445b8013ca96845efeb82ddd9a41d1a8e746642ce4bbd85f75987484

  • SHA512

    92ab1ff5ea7f6d20cfed492e33cd9fa72c74e4a7a923e8042347a9edeb086f68ed9470b727cc839ca526838d10715892343a637346d58649b23da7e100b6479c

  • SSDEEP

    768:3Uz7yVEhs9+Hs1SQtOOtEvwDpjO9+4hdCY8EQMjpi/Wpi3B3URiLqCyLuAx8XG9J:3P+HsMQMOtEvwDpjoHy7B3g9CWuAxWA

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies system certificate store 2 TTPs 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-28_65ee7bdc476e96f1292636a6831d37a9_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-28_65ee7bdc476e96f1292636a6831d37a9_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:8
    • C:\Users\Admin\AppData\Local\Temp\misid.exe
      "C:\Users\Admin\AppData\Local\Temp\misid.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Modifies system certificate store
      PID:4072

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\misid.exe

    Filesize

    62KB

    MD5

    03c839a201f0b77623a0335b788e184b

    SHA1

    0abb0c39fc915dc21e8c3c036cf751d5b62e9711

    SHA256

    8d151b2c57d1359c78c043cdc802caff71ce3dd14534186a14195a580f1c0af9

    SHA512

    97e6e63d1e2d84f3c64b41efbfb336475c196f6a5467e684dcfc0c4b645292de0b0379b28281ce381adc6e7638b5d62ce548f0e13cdb82032c2a224490e8255c

  • C:\Users\Admin\AppData\Local\Temp\misids.exe

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/8-0-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB

  • memory/8-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/8-3-0x0000000000590000-0x0000000000596000-memory.dmp

    Filesize

    24KB

  • memory/8-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/8-18-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB

  • memory/4072-17-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB

  • memory/4072-20-0x00000000007D0000-0x00000000007D6000-memory.dmp

    Filesize

    24KB

  • memory/4072-26-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/4072-49-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB