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Analysis

  • max time kernel
    147s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    08/04/2024, 20:29

General

  • Target

    2024-04-08_6678c103a8b17a22be879b5cc8db29fb_cryptolocker.exe

  • Size

    63KB

  • MD5

    6678c103a8b17a22be879b5cc8db29fb

  • SHA1

    0fecfd195045bafbb445c20503af1f79f72c4963

  • SHA256

    8efdb20ce0c634ec9e5423f63e509734144c1b38eebca767181b9aaa32fff7df

  • SHA512

    0a100f94d7e3f518469eb47630f6a5ff49cd0222170aacdcc4f3012b09710d1be9d62e0f78557337a51e9606e33ed7e6a090b4f26fb40c2e0b444762482ef54f

  • SSDEEP

    768:zQz7yVEhs9+syJP6ntOOtEvwDpjFelaB7yBEY9Su8F5mLZ5ScC:zj+soPSMOtEvwDpj4kpmeLmLC

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\2024-04-08_6678c103a8b17a22be879b5cc8db29fb_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-08_6678c103a8b17a22be879b5cc8db29fb_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3940
    • 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:1084

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    63KB

    MD5

    65ea4c16e75845b7ec39e757ba821e5a

    SHA1

    d27cd9568839b94f8de5097628db992af2aea413

    SHA256

    d20507c1b85589da22effef099d94bd8827abb18c2f68a4da459ce298a2d40d3

    SHA512

    c457077fc840c216d291e5fa62cf46442ab09dfa55481d05f97d9f13b69faaf600c0632fbb2aea131654574f743cd53d96665aac4775652397a30bb8b1e25d49

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1084-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/1084-23-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/1084-48-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3940-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3940-1-0x00000000005F0000-0x00000000005F6000-memory.dmp

    Filesize

    24KB

  • memory/3940-2-0x00000000005F0000-0x00000000005F6000-memory.dmp

    Filesize

    24KB

  • memory/3940-3-0x0000000000610000-0x0000000000616000-memory.dmp

    Filesize

    24KB

  • memory/3940-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB