Analysis

  • max time kernel
    119s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    04-06-2024 00:24

General

  • Target

    2024-06-04_5fff1872ff95d09e59f17f44020f88e7_bkransomware.exe

  • Size

    71KB

  • MD5

    5fff1872ff95d09e59f17f44020f88e7

  • SHA1

    721f3517a4826dd530d28e1ddcf718383ecb4197

  • SHA256

    24cf61fc1f05c71abba8bba768cd57e1923aa612c787c9b7b7525158473b1c25

  • SHA512

    d1fc066814e1c45572803141eeb385a16dd30b643a6bf139fcf221193c833d4b085a3c63e212d7e374de17c1c18a49cc01005b00e0218ec9dd6b3f641f7c0dc9

  • SSDEEP

    1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTK:ZhpAyazIlyazTK

Malware Config

Signatures

  • Executes dropped EXE 1 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 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-06-04_5fff1872ff95d09e59f17f44020f88e7_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-04_5fff1872ff95d09e59f17f44020f88e7_bkransomware.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2756
    • 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:1728

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\1WJD4CUT0yCSHtb.exe

    Filesize

    71KB

    MD5

    b40391c0be3f8276c7a950b7a81de552

    SHA1

    98719fca196f8a20556fa22e34f9fdd4d5d72fd4

    SHA256

    3ba3c19b3cdb92c7fc16d36abe075c49c7f801de7867c99c51d34d42597ac08b

    SHA512

    df82ea8fd606cb9636daa014026bd596eb7e745b60655971772cda5bc1517abda3d3dc5c6b415e02ac2883d49df6f0224af4d7d6cf90cf4a4a83c2eb73b80ad2

  • C:\Windows\CTS.exe

    Filesize

    71KB

    MD5

    66df4ffab62e674af2e75b163563fc0b

    SHA1

    dec8a197312e41eeb3cfef01cb2a443f0205cd6e

    SHA256

    075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

    SHA512

    1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25