Analysis

  • max time kernel
    92s
  • max time network
    94s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03-06-2024 09:46

General

  • Target

    2024-06-03_eed7c72ac005ec2aff1842c04688a730_bkransomware.exe

  • Size

    71KB

  • MD5

    eed7c72ac005ec2aff1842c04688a730

  • SHA1

    0dece82001a391a317028fe3c737c5e34dd2dccb

  • SHA256

    491adfdc3cce051731ea87c3ca9e16ffcdd8d8cc9e10d9649f8b49d5575def92

  • SHA512

    993d53d4a8708cc79a42c27b33516add0bccdeee23662540c984671955248f5d3b053e52249f4a045fa2c3d9a8015726e568976e8b041167bdc9fed10e1fee8e

  • SSDEEP

    1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTn:ZRpAyazIliazTn

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 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-06-03_eed7c72ac005ec2aff1842c04688a730_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-03_eed7c72ac005ec2aff1842c04688a730_bkransomware.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1336
    • 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:2732

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml

    Filesize

    392KB

    MD5

    8d4a552c02bd977f7f99f7f34adb866f

    SHA1

    707944e73a0dbc7cc768edcb625f1d62eabc129f

    SHA256

    458e7cba3b5da1407271567433ced020d2ccf4b57bf7db4fada141b68bd43a04

    SHA512

    bc38b58e5aca68b955452f3a4a44dae42b2760b5501b9011afc989fb67713efcbb959377444a49563caa104f632e53abc1d63701a34876f56d189f358afdbce0

  • C:\Users\Admin\AppData\Local\Temp\piEkocDQIPq3ujK.exe

    Filesize

    71KB

    MD5

    027e94f3e2dd93dfe8b0d69118fed7d5

    SHA1

    6a0187e291539a6c11b64a1d5ca56f097d8e4343

    SHA256

    dc68c1c45c77b7130185702ddd2996d3d407178912644b04c08f8eda80fe7a25

    SHA512

    2e535b394625f64a376e53aafebea467d58d259ca274bdf870948b2d2f042754c189de3e6a56e48d799dcf57ae26b94b7e45d379a256dec50defa87f4d9b3519

  • C:\Windows\CTS.exe

    Filesize

    71KB

    MD5

    f9d4ab0a726adc9b5e4b7d7b724912f1

    SHA1

    3d42ca2098475924f70ee4a831c4f003b4682328

    SHA256

    b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

    SHA512

    22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432