Analysis

  • max time kernel
    121s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    03-06-2024 09:29

General

  • Target

    2024-06-03_1e138ba27e069eebe7d994fb51386e90_bkransomware.exe

  • Size

    96KB

  • MD5

    1e138ba27e069eebe7d994fb51386e90

  • SHA1

    75bb629f11e6664caf3213a36126f9656a2f5c74

  • SHA256

    7ad69e79d3fa46aab84ecec563eca22611b4ac81e52967cfc1b87d4e3044a21e

  • SHA512

    c5f6897276a22bb5f80b778b2a5c40fd11013a6b1fea02ac9a9d0fb033d5f523372186cf6b7aca08de2aee955e0ee2a8188d0eeeeaf91387ada2eab1b1f254d5

  • SSDEEP

    1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTrS/LKx0d/WItQAEKbO+:ZRpAyazIliazT+/WWFWF5KS+

Malware Config

Signatures

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 3 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\2024-06-03_1e138ba27e069eebe7d994fb51386e90_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-03_1e138ba27e069eebe7d994fb51386e90_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:2184
    • C:\Users\Admin\AppData\Local\Temp\CYYr7cQfRnnrwAw.exe
      C:\Users\Admin\AppData\Local\Temp\CYYr7cQfRnnrwAw.exe
      2⤵
      • Executes dropped EXE
      PID:1752
    • 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:2200

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\CYYr7cQfRnnrwAw.exe

    Filesize

    96KB

    MD5

    357e685f534ad6bbf22bfb9766733324

    SHA1

    eac21f61dcc4384f0c1fa9ee3663b23321ae11ed

    SHA256

    9daea149ee8edf1d29e1195dc7a9d71041dac16828957a086e421ad8d3ea595e

    SHA512

    4b924d5db0b3da1d37765b07e50e7ad75b5a99ad5de82b42d754b2d9770e5bd5b5fd7a7f36a736cdaec143959cf640802d0452c928b00630de8a55333b64d01e

  • C:\Windows\CTS.exe

    Filesize

    71KB

    MD5

    f9d4ab0a726adc9b5e4b7d7b724912f1

    SHA1

    3d42ca2098475924f70ee4a831c4f003b4682328

    SHA256

    b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

    SHA512

    22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

  • \Users\Admin\AppData\Local\Temp\CYYr7cQfRnnrwAw.exe

    Filesize

    25KB

    MD5

    abbd49c180a2f8703f6306d6fa731fdc

    SHA1

    d63f4bfe7f74936b2fbace803e3da6103fbf6586

    SHA256

    5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1

    SHA512

    290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9

  • memory/1752-15-0x0000000000400000-0x000000000040D000-memory.dmp

    Filesize

    52KB