Analysis

  • max time kernel
    121s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    03-06-2024 08:37

General

  • Target

    2024-06-03_f262fcd17104f903e343fe739502f0d6_bkransomware.exe

  • Size

    72KB

  • MD5

    f262fcd17104f903e343fe739502f0d6

  • SHA1

    90f1aebffe5e3966a0ce94c9dc9ded1d9dcf8c61

  • SHA256

    620d13c4a73f2fef68c67391ab2cfa00dbe4443a673352df13cb265c2f00d5e1

  • SHA512

    7f6a336e3c62a59709f81e7ec39699086b514a493b1e51d00fc990459ce378e172de6bd7c98145e43a410ae963bd47ff4625ab0692aaf1fcee40c6db1658c531

  • SSDEEP

    1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT6:ZRpAyazIliazT6

Malware Config

Signatures

  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops file in Windows directory 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-06-03_f262fcd17104f903e343fe739502f0d6_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-03_f262fcd17104f903e343fe739502f0d6_bkransomware.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2428
    • C:\Windows\CTS.exe
      "C:\Windows\CTS.exe"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Drops file in Windows directory
      • Suspicious use of AdjustPrivilegeToken
      PID:2296

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\JngAhQQLVWkffW7.exe

    Filesize

    72KB

    MD5

    855f411fb454a585b04aadd1cdb5bdef

    SHA1

    867a24728a654eaffd3c8faf4ebb1f8e1db62b7f

    SHA256

    5edf2c5889fe3c968d6e1541221b34334495419b898677ab712ce2ee19184d2a

    SHA512

    28a0289d3e2f0921a43b14447098f30ddbb6d5f255e25ae71fcd5438adeb219021a627ec4e2d70a853baab22b2781ba9bfca941a2833f8c008a5e490cbd874fd

  • C:\Windows\CTS.exe

    Filesize

    71KB

    MD5

    f9d4ab0a726adc9b5e4b7d7b724912f1

    SHA1

    3d42ca2098475924f70ee4a831c4f003b4682328

    SHA256

    b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

    SHA512

    22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432