Analysis

  • max time kernel
    51s
  • max time network
    51s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13-06-2024 03:54

General

  • Target

    2024-06-13_fae16e4b6c2754512cd232f6ec1311be_bkransomware.exe

  • Size

    96KB

  • MD5

    fae16e4b6c2754512cd232f6ec1311be

  • SHA1

    d1cfc31cbc512d345b1547cd5df8816b0e1f4ff4

  • SHA256

    3b362a61193dddcab3f3d7c7d150108b7fcb027a689560cefbffa11d40c478f7

  • SHA512

    3893e81939d01f1645bc482a05d6f9a2048b62ff64e62ef86c3db0d089b23b9dc4a6a62e5f51a401db55ae38ef70b67690a4e4d13b32cd8691b8a2619b914818

  • SSDEEP

    1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTQ7rwiObRKTFwVlThA:ZhpAyazIlyazTQ7CKmVk

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\2024-06-13_fae16e4b6c2754512cd232f6ec1311be_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-13_fae16e4b6c2754512cd232f6ec1311be_bkransomware.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:232
    • C:\Users\Admin\AppData\Local\Temp\COKEZpDUUJb1I3F.exe
      C:\Users\Admin\AppData\Local\Temp\COKEZpDUUJb1I3F.exe
      2⤵
      • Executes dropped EXE
      PID:1224
    • 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:2916

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

    394KB

    MD5

    d7db552f3b735605769344828927c283

    SHA1

    3ecedb24c1e893b5288abe0de24c9582b7c07602

    SHA256

    06a86a5e1faad9b3335fdc6a2923922e3dd859294739daeb8562baf07f9fb9a2

    SHA512

    eaf915b3782acbd4ab940bc687e3fb1bddad30c272077d3adbc7f15b9770ab141da64d6605a6e14baa8db84d1b7a63e5d451a058e2ad9a664a3caeb50318d6af

  • C:\Users\Admin\AppData\Local\Temp\COKEZpDUUJb1I3F.exe

    Filesize

    25KB

    MD5

    abbd49c180a2f8703f6306d6fa731fdc

    SHA1

    d63f4bfe7f74936b2fbace803e3da6103fbf6586

    SHA256

    5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1

    SHA512

    290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9

  • C:\Windows\CTS.exe

    Filesize

    71KB

    MD5

    66df4ffab62e674af2e75b163563fc0b

    SHA1

    dec8a197312e41eeb3cfef01cb2a443f0205cd6e

    SHA256

    075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

    SHA512

    1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

  • memory/1224-8-0x0000000000400000-0x000000000040D000-memory.dmp

    Filesize

    52KB