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Analysis

  • max time kernel
    121s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20240611-en
  • resource tags

    arch:x64arch:x86image:win7-20240611-enlocale:en-usos:windows7-x64system
  • submitted
    27/06/2024, 10:24

General

  • Target

    2024-06-27_21fa9baff8f2dc06bb7c7ceb7dd18f60_bkransomware.exe

  • Size

    96KB

  • MD5

    21fa9baff8f2dc06bb7c7ceb7dd18f60

  • SHA1

    e6622a7b52832af654877705ce5a4dc36758c07e

  • SHA256

    77b29e4163f1b177d410a29eb82889bf26d7f25271c59ae08e930d8be62a7dce

  • SHA512

    c7833ab71a67a0cab28e14baf66b92f2c1c9b7f3c9865020731d1c270e91693b3b2255fcadef0a39a590eac72e18c340f6654f70f439a59cc83c6477d6b0d241

  • SSDEEP

    1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTPiaPY2lwDxVXV:ZhpAyazIlyazTPioiHXV

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\2024-06-27_21fa9baff8f2dc06bb7c7ceb7dd18f60_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-27_21fa9baff8f2dc06bb7c7ceb7dd18f60_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:2484
    • C:\Users\Admin\AppData\Local\Temp\SiP3IyTxppCi6FG.exe
      C:\Users\Admin\AppData\Local\Temp\SiP3IyTxppCi6FG.exe
      2⤵
      • Executes dropped EXE
      PID:1700
    • 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:2228

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\SiP3IyTxppCi6FG.exe

    Filesize

    96KB

    MD5

    5725437141b4e5cb48d28a57540004cd

    SHA1

    f9ecc5a4489e3db6f48c630a23f9de4a276bcaa6

    SHA256

    8c140e99874d461878b9bd8b16955ca789066d343a863785b05bc9cedda41fc6

    SHA512

    ac07488c03b616867ae8454af0ffcc994d631656af2805c67ee442e38aa7c9235a380f3ae0274c68966dbdaac9ad581ead113ecd6f0a1cf70848d91ad6b4b149

  • C:\Windows\CTS.exe

    Filesize

    71KB

    MD5

    66df4ffab62e674af2e75b163563fc0b

    SHA1

    dec8a197312e41eeb3cfef01cb2a443f0205cd6e

    SHA256

    075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

    SHA512

    1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

  • \Users\Admin\AppData\Local\Temp\SiP3IyTxppCi6FG.exe

    Filesize

    25KB

    MD5

    abbd49c180a2f8703f6306d6fa731fdc

    SHA1

    d63f4bfe7f74936b2fbace803e3da6103fbf6586

    SHA256

    5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1

    SHA512

    290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9

  • memory/1700-15-0x0000000000400000-0x000000000040D000-memory.dmp

    Filesize

    52KB