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Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05/04/2024, 20:34

General

  • Target

    2024-04-05_5903c1818823ac32de496c08bf75e227_cryptolocker.exe

  • Size

    63KB

  • MD5

    5903c1818823ac32de496c08bf75e227

  • SHA1

    b793839c76bbae1fd968585dabff7d34419378a8

  • SHA256

    4f36558b30a0c30138d276ad1e5163e6e8c96fe67188a8eecc3b79c1d06925d5

  • SHA512

    07695ad43c40f84e07c7e549bf803ddfbf7d573ca2f79b6f43e000c2f3802365990937e6ecf3f2f9dfcbe3c5696e6898dcf15b54d46095760934ddc2cbe02479

  • SSDEEP

    768:zQz7yVEhs9+syJP6ntOOtEvwDpjFelaB7yBEY9Su8F5mnVwfX7:zj+soPSMOtEvwDpj4kpmeLmnw7

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 IoCs
  • UPX dump on OEP (original entry point) 4 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 1 IoCs
  • UPX packed file 4 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • 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\2024-04-05_5903c1818823ac32de496c08bf75e227_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-05_5903c1818823ac32de496c08bf75e227_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2872
    • 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:3408

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    64KB

    MD5

    7245ba12664d18f22df5f19cf0d0f207

    SHA1

    c8c5b447670cf8b874f1ff410c17c5a9dcd2dd76

    SHA256

    52f84d9f0f097069e683b0357ed604c297c028825c7b82dd8325979b7137ad81

    SHA512

    5afcb5223b915e56b54ad0d2a18a508f4e7c20131b8779aa093ed56b3fc9c3c24aa7f45a85373f2e4178f198dd5bc00ac0c49db446ce4d0213a8a78f6a44e265

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2872-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2872-1-0x00000000006C0000-0x00000000006C6000-memory.dmp

    Filesize

    24KB

  • memory/2872-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

    Filesize

    24KB

  • memory/2872-3-0x00000000006E0000-0x00000000006E6000-memory.dmp

    Filesize

    24KB

  • memory/2872-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3408-19-0x0000000000510000-0x0000000000516000-memory.dmp

    Filesize

    24KB

  • memory/3408-20-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/3408-48-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB