Analysis

  • max time kernel
    121s
  • max time network
    125s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    09/06/2024, 07:34

General

  • Target

    2024-06-09_cf39085b9da0db42e767436878da1cf6_bkransomware.exe

  • Size

    71KB

  • MD5

    cf39085b9da0db42e767436878da1cf6

  • SHA1

    e04ad1d12a3bd14bb1d5c9ab1bc2b751cfaad55a

  • SHA256

    04c56b9ff809aaef4afafe40c233fa1f9264b9783216e76c1311528651f706af

  • SHA512

    cbc42bba577dcf6034dce05d7c76efa1e7e0fc885f8047c1edf8e0683fd2c4b3e2fa5d266edd8ea9c2bdaeba59c0236142630ca4416037039cf9fbb9be06d972

  • SSDEEP

    1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT8:ZRpAyazIliazT8

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\2024-06-09_cf39085b9da0db42e767436878da1cf6_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-09_cf39085b9da0db42e767436878da1cf6_bkransomware.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2256
    • 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:2364

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\8KQXxldKxlDmrq2.exe

    Filesize

    71KB

    MD5

    e3d43aeb96db1f81d07586647c3a5ee2

    SHA1

    60791e9ad0a48ba846a18ddb38faaa6cf78d1ab1

    SHA256

    34ffd65b7294528fb8327bcab8010755f5258c340319a909b0f171f95f5760de

    SHA512

    a230f8a5d3283b9d9c46db2c31dfaffca889832d578407ad62791bd4352fe64a4d917247822130f6062e43e9c22cc5162da6f6cffcdca86e38d22ac362fe6138

  • C:\Windows\CTS.exe

    Filesize

    71KB

    MD5

    f9d4ab0a726adc9b5e4b7d7b724912f1

    SHA1

    3d42ca2098475924f70ee4a831c4f003b4682328

    SHA256

    b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

    SHA512

    22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432