Analysis

  • max time kernel
    118s
  • max time network
    119s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    03-06-2024 09:31

General

  • Target

    2024-06-03_364e0b86d674ba928843dadc91e7dad5_bkransomware.exe

  • Size

    74KB

  • MD5

    364e0b86d674ba928843dadc91e7dad5

  • SHA1

    f6be43700984bab074063a4d8cabac8307777d0f

  • SHA256

    2d5736e6f39945d5f06223a6c75e9103f6ede7702890bf2496e5c8fa982350a7

  • SHA512

    494ec796e6bd05a7f0a9b4973abebbe5cbd566b60810fdd22fd3a763f8610707d6259ac65c4a3fa21dbc13c24f2857f89b4b2529d0a49edb6eb851e8b885d195

  • SSDEEP

    1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTmmTb:ZhpAyazIlyazTVb

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\2024-06-03_364e0b86d674ba928843dadc91e7dad5_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-03_364e0b86d674ba928843dadc91e7dad5_bkransomware.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:948
    • 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:1900

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\1nlzRre5bBFf3EE.exe

    Filesize

    74KB

    MD5

    f8660f03ea5bce6bbbac04fe7133ab6e

    SHA1

    2b771621bad315216d1c44fc834b555a650ebcc0

    SHA256

    768b6b7801693ff0dac25eaf673b1e536c328951e552089dd0ee0eeb10579ae3

    SHA512

    0b644c186fa45c45706b28016ca75fc92562efdce010d9dc7450e8743bc82360a48de115c59132ea1e023d044c41e0484032f98292ef5ff34d97b17119c5ef9b

  • C:\Windows\CTS.exe

    Filesize

    71KB

    MD5

    66df4ffab62e674af2e75b163563fc0b

    SHA1

    dec8a197312e41eeb3cfef01cb2a443f0205cd6e

    SHA256

    075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

    SHA512

    1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25