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Analysis

  • max time kernel
    14s
  • max time network
    19s
  • platform
    windows7_x64
  • resource
    win7-20240704-en
  • resource tags

    arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-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 3 IoCs
  • Loads dropped DLL 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 8 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⤵
    • Loads dropped DLL
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1972
    • C:\Users\Admin\AppData\Local\Temp\BlQXP4Z2bQM0uYe.exe
      C:\Users\Admin\AppData\Local\Temp\BlQXP4Z2bQM0uYe.exe
      2⤵
      • Executes dropped EXE
      PID:1760
    • 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:2444

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\BlQXP4Z2bQM0uYe.exe

    Filesize

    172KB

    MD5

    b25d8a851e60950fdf945f3ce6dc4fdf

    SHA1

    c62172f40dbf3cc9cff45cbd9a8f7df4fe66c4a0

    SHA256

    758d866d297cd8c5e0975b6da78777ae620d9432aca291b5c78793bc1748e1cc

    SHA512

    c66bf9d75b0e7d6fea7c267aa5f09884e7b4746bc2704b8ff476f349f54d51ad51c4e4efb49e4d3c168caee108c6d4bb871aef3d35287595c6235def563b730d

  • C:\Windows\CTS.exe

    Filesize

    71KB

    MD5

    66df4ffab62e674af2e75b163563fc0b

    SHA1

    dec8a197312e41eeb3cfef01cb2a443f0205cd6e

    SHA256

    075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

    SHA512

    1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

  • \Users\Admin\AppData\Local\Temp\BlQXP4Z2bQM0uYe.exe

    Filesize

    100KB

    MD5

    db697c943fcb215f757f9c22c907c568

    SHA1

    c57d891472f5ede8b1ee5d9bd6f5ad8fc8e9e5d7

    SHA256

    07c96337729e3c4c986e8f5660a97cb475c4c04842606be2654b37892af57de9

    SHA512

    bfa5c34d8c78015ccf96a2ef1c6d8f82157eb88680139bdbb51c55e3cd2a7c41bf364a364fd62b180b202cdf4f3d7d31c3710b8709c1d25a639bb00dfc97b646