Analysis

  • max time kernel
    121s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20240220-en
  • resource tags

    arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
  • submitted
    04-06-2024 00:28

General

  • Target

    2024-06-04_9d907de961e3f0f14fe3da905c77122c_bkransomware.exe

  • Size

    71KB

  • MD5

    9d907de961e3f0f14fe3da905c77122c

  • SHA1

    4282c265d224adc4fad02171c0a34ff99872bfc8

  • SHA256

    9b72c3dc86282139d039f45ee6ce6ee546a7d9c209fb9ca4736c5b05774b3f3c

  • SHA512

    8d2614bea71007996af00fd0ae794d4cd86802e82278786b3c0bb4663986a6bb3639998d5a1d8d649480633c1f161272d26b11ce75b0011fdf2717ce8c0896a6

  • SSDEEP

    1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTB:ZRpAyazIliazTB

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\2024-06-04_9d907de961e3f0f14fe3da905c77122c_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-04_9d907de961e3f0f14fe3da905c77122c_bkransomware.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1940
    • 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:3048

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\egfBY8mWsh3Y1v9.exe

    Filesize

    71KB

    MD5

    2650bf72fd6322776ee9bd69a0ed9a35

    SHA1

    cb53d30abdc132f383cef19738d9ed0729f91379

    SHA256

    df49a7093056889f531868a3b6af55fa6794462dabbe3b73165619f733e0f6fd

    SHA512

    af003ea421bdac0e811b9222a5356b1ecab3775b2f76407ec3f7fbe1065087134810ab7eb09188d0a998264fe1f489cb83ffbec021ee4ed885d47c128f96e9e3

  • C:\Windows\CTS.exe

    Filesize

    71KB

    MD5

    f9d4ab0a726adc9b5e4b7d7b724912f1

    SHA1

    3d42ca2098475924f70ee4a831c4f003b4682328

    SHA256

    b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

    SHA512

    22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432