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Analysis

  • max time kernel
    148s
  • 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, 02:54

General

  • Target

    2024-04-05_cd5ff9948c6df62d4cfd69e773c5740e_cryptolocker.exe

  • Size

    82KB

  • MD5

    cd5ff9948c6df62d4cfd69e773c5740e

  • SHA1

    7a2b839234cea6cde13f3017ba46df6851f89dfd

  • SHA256

    1efcc9c19e08b55e7962ad3df778685e6014927e541843e20978f44d113e9fd5

  • SHA512

    88f4737da5f228b97923737e59b8a7faaeb174036f683d6053a6cb4ac3422f04a189535612b6f2677e3dd3762e2edea126fdb88298f056eb28684bae180e703b

  • SSDEEP

    1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOT75:T6a+rdOOtEvwDpjNF

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 1 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).

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-04-05_cd5ff9948c6df62d4cfd69e773c5740e_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-05_cd5ff9948c6df62d4cfd69e773c5740e_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1656
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:3396

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    83KB

    MD5

    0809a8a886b5c467eb2fc52eb2e3afbe

    SHA1

    7075d30d68ffd83ec4db0b63d3032ef473c419ee

    SHA256

    408d9d769998b46c3de5cc4e1e12c96dcb15f8aabf6d9c35e2a9553e9e66e936

    SHA512

    dcd102f44c36fb48e8adf2c16b496bd976859fcf99be81a5c496f57bca1229685631f5a46102c351556471e4ae923aa38761989619835f676ecf62d485d8bcfc

  • memory/1656-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1656-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/1656-2-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/1656-3-0x00000000005D0000-0x00000000005D6000-memory.dmp

    Filesize

    24KB

  • memory/1656-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3396-19-0x0000000002090000-0x0000000002096000-memory.dmp

    Filesize

    24KB

  • memory/3396-24-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/3396-26-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB