Analysis

  • max time kernel
    118s
  • max time network
    119s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    12-10-2024 08:45

General

  • Target

    2024-10-12_821faf420d3771fa5fb903b5b031c555_bkransomware.exe

  • Size

    595KB

  • MD5

    821faf420d3771fa5fb903b5b031c555

  • SHA1

    dcd2ecf229422b35e11abecc0e018b8d829babb8

  • SHA256

    cfc2df936823bb9fa8fd06c4bb02a00b23bfcb91ffa37193420f0025cefa4ae4

  • SHA512

    f1853602df5eb5b21f6af200ef3e4b0c650c270eed708c710b30f24fe73fc34b74950b181cf741c3c666a6410b08e6801995ed2d044c9a5e1e5c77056f1a5828

  • SSDEEP

    12288:hS0OWhYsioAunt7539x8edAi69+fTIQfhMgoR3Ptf1NlDT4HmPathKWUr7rwf:DOOYPop753r8edt69+f5gf1Nx4GiWWUE

Malware Config

Signatures

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Reads user/profile data of web browsers 3 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
  • System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-10-12_821faf420d3771fa5fb903b5b031c555_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-10-12_821faf420d3771fa5fb903b5b031c555_bkransomware.exe"
    1⤵
    • Loads dropped DLL
    • Adds Run key to start application
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2124
    • C:\Users\Admin\AppData\Local\Temp\IUBQLPsL29s6UaH.exe
      C:\Users\Admin\AppData\Local\Temp\IUBQLPsL29s6UaH.exe
      2⤵
      • Executes dropped EXE
      PID:936
    • 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:588

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\IUBQLPsL29s6UaH.exe

    Filesize

    595KB

    MD5

    fdec431048154ca62a2c7ee7e636ed1f

    SHA1

    8f39455e06272ee3ca1449c27cb3a12c73a9bde0

    SHA256

    1d6bb6b71f074665a90c0bd8db05bd68d9b30fa96be08b2cff9cde88f2573543

    SHA512

    7da71f2bf951af6d372e862f16d3a42572b8dc2987809d61faa02afaab3fb731eb899ab3bb8284273b9f38faf141132e56c19e4b48b4e851028565f107986e09

  • C:\Windows\CTS.exe

    Filesize

    71KB

    MD5

    66df4ffab62e674af2e75b163563fc0b

    SHA1

    dec8a197312e41eeb3cfef01cb2a443f0205cd6e

    SHA256

    075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

    SHA512

    1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

  • \Users\Admin\AppData\Local\Temp\IUBQLPsL29s6UaH.exe

    Filesize

    524KB

    MD5

    645d5875c0ce2052d93943c62238a06e

    SHA1

    38c00dfaa6e0192e1157212d5baf42a8db869776

    SHA256

    66ef54018ef1207394bef76bcb0411f2fbbedd6230a812026bf8f1710218dbf9

    SHA512

    eb9654b527ddc15fae042ef6fa6b8a25f76c2fc21314abd1d629bac5066cfa11d9f3c1191150dc7784b20e5e47c4855ab97d34fadf904989a7a43ccd626949fe