Analysis

  • max time kernel
    88s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/03/2024, 14:48

General

  • Target

    2024-03-28_b1140c13592a61579663ffa101afe792_cryptolocker.exe

  • Size

    63KB

  • MD5

    b1140c13592a61579663ffa101afe792

  • SHA1

    84ab062dcdaccbe0c5a09076124ae9f7269a71a5

  • SHA256

    712c5e3f22be76994182e923aa9df9dfb79f18f948aecd7cf7a8dcece31e64de

  • SHA512

    1edc23414ebc1b53eecd7a752109b2ee3f1af9a7e2c40788287b3263be4be364155309a81f87bbe4f278b3547607db399816e31daa76498224958ab883a2da78

  • SSDEEP

    1536:Tj+jsMQMOtEvwDpj5HmpJpOUHECgNMo0vp2l9tMPvdr:TCjsIOtEvwDpj5HE/OUHnSMY2

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 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
  • 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\2024-03-28_b1140c13592a61579663ffa101afe792_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-28_b1140c13592a61579663ffa101afe792_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4796
    • 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:3736

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    63KB

    MD5

    c5ffced58c0d127d14d0fa98defb929e

    SHA1

    5d89d47408005ec8d771290fd3916ca58f13f3c4

    SHA256

    8aa5e9de58249341900fee9a4caa4206c109deb9a65534d2542465f972cab540

    SHA512

    61863993829f3815b3a6ee464b27fba6334c3bcc8ad798545916f3b0f7ccd412dd620f8a1ad1e96df722e4714ba6ad6bd10f68c954d2fcb1bd2a5d613fc5cb42

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/3736-19-0x0000000000750000-0x0000000000756000-memory.dmp

    Filesize

    24KB

  • memory/3736-21-0x0000000000730000-0x0000000000736000-memory.dmp

    Filesize

    24KB

  • memory/3736-48-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/4796-0-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/4796-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4796-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4796-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/4796-17-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB