Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22/07/2024, 15:53

General

  • Target

    2024-07-22_cbc833251bc03a569b83b78e268acd97_bkransomware.exe

  • Size

    172KB

  • MD5

    cbc833251bc03a569b83b78e268acd97

  • SHA1

    3e140a2f507bd8609fdd576075e29de792114ee4

  • SHA256

    7f781b930315bdfcbd1832feec7e2896fb1986498157d253895e5bd285d87373

  • SHA512

    319e733aa718bcf46cb59e85a46d318a596b3763dcaf7c32581acfe8c513a2451fb579edb9c55474a9bad3d09c8c8a22f2e919dcc1135c288cd7299dace71b56

  • SSDEEP

    3072:ZhpAyazIlyazTCKncoIhVA9xce4CLJaPQal7tn3P+Za4:hZMazbnhw+9xj1aYmWd

Malware Config

Signatures

  • Executes dropped EXE 2 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 5 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-07-22_cbc833251bc03a569b83b78e268acd97_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-07-22_cbc833251bc03a569b83b78e268acd97_bkransomware.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4812
    • C:\Users\Admin\AppData\Local\Temp\v3JaF7WMAnM4zRe.exe
      C:\Users\Admin\AppData\Local\Temp\v3JaF7WMAnM4zRe.exe
      2⤵
      • Executes dropped EXE
      PID:3384
    • 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:4028

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml

    Filesize

    392KB

    MD5

    bf0c94c03f05dd4a5ecd6b1036d1d485

    SHA1

    360ecc46bdcf1a77ff700c136ba08202b641b3a9

    SHA256

    80c41e5cd4e3ebfd5a57d83df46ef7888a247a96d9614012259bb85676c9ddf5

    SHA512

    3ea483b4a524b2c90ccacf26937ac7e887e3b193e51d7074d1485a3d06349b97eb98428deb150c4acda49122b96412ba016d1299487c720e1ae0617173ee0383

  • C:\Users\Admin\AppData\Local\Temp\v3JaF7WMAnM4zRe.exe

    Filesize

    172KB

    MD5

    ec3c19c19e10be852469cff5ef0a3e56

    SHA1

    f8a39b0796b95718bd6490dca0d22cdb92912ad3

    SHA256

    bde4f02689d15b1a714a1b93cebe3af25d8039b6535bb5d5adbcec94e1e1f193

    SHA512

    86b8e218f2106dcfaeb58082a70092613f43d2ffb1d8b9cb61436d9de60b1230e3448155469858b1c12ee55a5ec034e9d9502e34665c28898c00d4756bdc057f

  • C:\Users\Admin\AppData\Local\Temp\v3JaF7WMAnM4zRe.exe

    Filesize

    100KB

    MD5

    db697c943fcb215f757f9c22c907c568

    SHA1

    c57d891472f5ede8b1ee5d9bd6f5ad8fc8e9e5d7

    SHA256

    07c96337729e3c4c986e8f5660a97cb475c4c04842606be2654b37892af57de9

    SHA512

    bfa5c34d8c78015ccf96a2ef1c6d8f82157eb88680139bdbb51c55e3cd2a7c41bf364a364fd62b180b202cdf4f3d7d31c3710b8709c1d25a639bb00dfc97b646

  • C:\Windows\CTS.exe

    Filesize

    71KB

    MD5

    66df4ffab62e674af2e75b163563fc0b

    SHA1

    dec8a197312e41eeb3cfef01cb2a443f0205cd6e

    SHA256

    075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

    SHA512

    1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25