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Analysis

  • max time kernel
    117s
  • max time network
    117s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    05/05/2024, 15:35

General

  • Target

    2024-05-05_8ac34719cb003de2defb7e044fc097e0_bkransomware.exe

  • Size

    71KB

  • MD5

    8ac34719cb003de2defb7e044fc097e0

  • SHA1

    beded5e6f4b094fa778f01e3429645f0d1aa236c

  • SHA256

    54a4ea1994f12418819fe0fb38c6e63065df677ae34caca945153de5a2b3a594

  • SHA512

    63359b6df19b39ea059dc2ddbbb769d12b37cc3240f597f92e703baa6d9f60bf59f3f5d425385ef7efeb5e31cf869ac9f60385cbd5842c36eaec2b3c34d3dd2b

  • SSDEEP

    1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTE:ZRpAyazIliazTE

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\2024-05-05_8ac34719cb003de2defb7e044fc097e0_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-05_8ac34719cb003de2defb7e044fc097e0_bkransomware.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1044
    • 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:2740

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\jM6yMNgBNc0J1XX.exe

    Filesize

    71KB

    MD5

    18b908d637155b00a56d01173a595812

    SHA1

    9a57fe8d62177797c069d1fcf5964efe6dd334dc

    SHA256

    1a0295e87a7db61163bb73a90068368614b9a1b874fe3120fca2e8dd37f9ef0c

    SHA512

    a0085b3d8f30cd9053bc9cbd245ad2b14aac089536afb624e3d4a5cbe4afc319005f9a05b69c65cc7832b38973c0831063fed97da13e70c76e457980695131cc

  • C:\Windows\CTS.exe

    Filesize

    71KB

    MD5

    f9d4ab0a726adc9b5e4b7d7b724912f1

    SHA1

    3d42ca2098475924f70ee4a831c4f003b4682328

    SHA256

    b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

    SHA512

    22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432