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Analysis

  • max time kernel
    119s
  • max time network
    119s
  • platform
    windows7_x64
  • resource
    win7-20240419-en
  • resource tags

    arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
  • submitted
    30/04/2024, 14:57

General

  • Target

    2024-04-30_bdfe14e3540a1a5ee06ffcc28dc03b0c_bkransomware.exe

  • Size

    71KB

  • MD5

    bdfe14e3540a1a5ee06ffcc28dc03b0c

  • SHA1

    2b66441e1b8993e79895f38aaf5f976047abf294

  • SHA256

    3abd39167a931d8abe0b77d73161a4b53407f183fcd0b94ac4cf0823e398b91c

  • SHA512

    ad58c503b7c342aa0df1224b84e275f8efbbeb0d9c09cfd87758a48b70a93f31044e44132411e9a9ef7f607456bef1382aaa3d171bbffc8c8248c8f2e61f4765

  • SSDEEP

    1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT9:ZRpAyazIliazT9

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\2024-04-30_bdfe14e3540a1a5ee06ffcc28dc03b0c_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-30_bdfe14e3540a1a5ee06ffcc28dc03b0c_bkransomware.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1312
    • 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:2184

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\47KrUdFCG8uqjyX.exe

    Filesize

    71KB

    MD5

    05b8c1ecfe5a116e29813d7cf5d1dea9

    SHA1

    1df59027e7826fed686f688219021f3d652fd154

    SHA256

    47209fec98e1b896751e0d94fb402318371743a1340129fdb75082ad91aaa09a

    SHA512

    d8b7f6e25be52d42e9b426961b1d6b7c4df58cf6d12495043cbd26f77f538f62987939bb0936906d4bb4f7fb85ccc9c776666e213ee3ba85d4153a4aaa447825

  • C:\Windows\CTS.exe

    Filesize

    71KB

    MD5

    f9d4ab0a726adc9b5e4b7d7b724912f1

    SHA1

    3d42ca2098475924f70ee4a831c4f003b4682328

    SHA256

    b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

    SHA512

    22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432