Analysis

  • max time kernel
    139s
  • max time network
    124s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-05-2024 15:36

General

  • Target

    2024-05-21_53459cb417384be20ab946cf311c352a_cryptolocker.exe

  • Size

    37KB

  • MD5

    53459cb417384be20ab946cf311c352a

  • SHA1

    853dc7ed4652f355bc26f7f94370e6e3f0e66df1

  • SHA256

    51c5fd50dad412619bc3e7fccc10bd64ec57398cbe1622425532a2401238ee6a

  • SHA512

    03d11bcfe37a90494440dd8d43e238da3ceef3d7b40eb42233404dce7477fefe7787111e7144c7b703b68a77dd67396f9c7063fe327b7160ae480e20aab7a854

  • SSDEEP

    768:fTz7y3lhsT+hs1SQtOOtEvwDpjfAu9+4q7:fT+hsMQMOtEvwDpjoIHE

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Detection of Cryptolocker Samples 1 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\2024-05-21_53459cb417384be20ab946cf311c352a_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-21_53459cb417384be20ab946cf311c352a_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1692
    • 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:4284

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    37KB

    MD5

    8c4948ec849d7e238721e0d054201d92

    SHA1

    d5949e3b6c6f898351525a6ea9fa096c126956b9

    SHA256

    e6b75067fd33f44b729dd2e82cfff2352170274adf76ed145666a2365c6bee37

    SHA512

    8e5f4b1567e4615b8cf639036fa1e41b9176e6b6f64844e9dde9c6d1ed3c9f2f0923252dde844f635da306e4901aef407383489aa08f512a3ca1433127909fae

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1692-0-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/1692-1-0x00000000007D0000-0x00000000007D6000-memory.dmp

    Filesize

    24KB

  • memory/1692-8-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/4284-17-0x0000000001F60000-0x0000000001F66000-memory.dmp

    Filesize

    24KB

  • memory/4284-23-0x00000000021D0000-0x00000000021D6000-memory.dmp

    Filesize

    24KB