Analysis

  • max time kernel
    106s
  • max time network
    127s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/01/2024, 08:37

General

  • Target

    2024-01-28_a1a48bbeeb9b1f3a149d88795fed4a07_cryptolocker.exe

  • Size

    52KB

  • MD5

    a1a48bbeeb9b1f3a149d88795fed4a07

  • SHA1

    606c151d6b57a75f75fe22956d5980d4d7190771

  • SHA256

    3b82b9a79b9ec246bf0443578c548439caeb0db4e1bff8892e07aa00fca0ffbd

  • SHA512

    9f5041ad8750e4275a249cedf1c4cf16b7f47118d8102d3ebb16807cdb53bc61f64c74f5c02a3409a92b725379eda6d76600ba24d0638a9a0d9fdcfb60989ebe

  • SSDEEP

    768:vQz7yVEhs9+js1SQtOOtEvwDpjz9+4hdCW1nw71TkhsiPn1YFv6dy/w2:vj+jsMQMOtEvwDpj5HH1nw73KOFN

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 5 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-01-28_a1a48bbeeb9b1f3a149d88795fed4a07_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-28_a1a48bbeeb9b1f3a149d88795fed4a07_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4524
    • 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:2948

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          52KB

          MD5

          cf5bbb7ea7864d86db9f00616fed32d5

          SHA1

          09fcad1f4a99328940257976c67b3985df2ae966

          SHA256

          70ec641a9530bb3f2e664f5834b9a59c92cf90c89c924c62ac49ae1d77c6b096

          SHA512

          10c6b9ee009189e32ad830fde07f7f8fcc6851701facbbd52b86f8f1aea672b9f03e28624d947ba90fedf24cf7faf998ff4eee58c90992a6160672ccfbd614e5

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/2948-23-0x00000000006B0000-0x00000000006B6000-memory.dmp

          Filesize

          24KB

        • memory/4524-0-0x0000000002050000-0x0000000002056000-memory.dmp

          Filesize

          24KB

        • memory/4524-1-0x0000000002050000-0x0000000002056000-memory.dmp

          Filesize

          24KB

        • memory/4524-2-0x0000000002070000-0x0000000002076000-memory.dmp

          Filesize

          24KB