Analysis

  • max time kernel
    93s
  • max time network
    95s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03-06-2024 09:43

General

  • Target

    2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe

  • Size

    96KB

  • MD5

    6d9c1457f7c1e8371f2b19578cebe8b5

  • SHA1

    16fe2bf152a52c52d929f0edafb38b415faa96ef

  • SHA256

    4a20e45e5ef46d57e041253c50cd001e354a1b793f64f072c6a005ab9d886046

  • SHA512

    fb80c64da8166c52db985a69fd04501be7e7e71968d4dfee976865150ad7bc12d7f8f663ebe65aeb4fb62fff3e6dec2cc3f21ca3ef467659f41956f9e2d5990d

  • SSDEEP

    1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTndpaf5tPKDz+CjMjJ0Tlc:ZRpAyazIliazTndp05tSDiJf

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\2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3380
    • C:\Users\Admin\AppData\Local\Temp\lGZ7t0gXRICUXUW.exe
      C:\Users\Admin\AppData\Local\Temp\lGZ7t0gXRICUXUW.exe
      2⤵
      • Executes dropped EXE
      PID:3348
    • 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:1504

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    395KB

    MD5

    adb495468b58fddef96de2e3d97264d6

    SHA1

    edb9c5af966998970ef9cc0473df75e58b45906e

    SHA256

    3ffff17ff14e5841e635aa9e6376d123b94f7a21c25ac94aef892f2c837390c4

    SHA512

    f1a349c20899b6c059d43caf0d9356d2c39e5ce180505d480183ce7dc0327d24044e071c37fc00b1b6d70355ae23db548fcea20bfd611638a2b2475ddd4f91ee

  • C:\Users\Admin\AppData\Local\Temp\lGZ7t0gXRICUXUW.exe

    Filesize

    25KB

    MD5

    abbd49c180a2f8703f6306d6fa731fdc

    SHA1

    d63f4bfe7f74936b2fbace803e3da6103fbf6586

    SHA256

    5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1

    SHA512

    290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9

  • C:\Windows\CTS.exe

    Filesize

    71KB

    MD5

    f9d4ab0a726adc9b5e4b7d7b724912f1

    SHA1

    3d42ca2098475924f70ee4a831c4f003b4682328

    SHA256

    b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

    SHA512

    22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

  • memory/3348-10-0x0000000000400000-0x000000000040D000-memory.dmp

    Filesize

    52KB