Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04-06-2024 01:40

General

  • Target

    2024-06-04_ddabb10468039a14619a357bd42f494d_bkransomware.exe

  • Size

    71KB

  • MD5

    ddabb10468039a14619a357bd42f494d

  • SHA1

    74e6ff7c661b4f4e5743d14e14caae6b73a93b87

  • SHA256

    9de7cac8c186c098f889262f30f87b76eb907a2545fe17fb3e8c8733b43b1f87

  • SHA512

    683468ecd9743b8dbf2374d2c453f27d69cdd4bbb2692f317afa4af6638991e287dce2122d00bb49a41137179df5cf85d9a4801d217613c8c42522977224b715

  • SSDEEP

    1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTE:ZhpAyazIlyazTE

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 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-06-04_ddabb10468039a14619a357bd42f494d_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-04_ddabb10468039a14619a357bd42f494d_bkransomware.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3440
    • 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:4832

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

    d36aaf51efccb154694b4c4d387ecd40

    SHA1

    a1541a5356d150b70455c154efcdc2575d657175

    SHA256

    9f7c7a5d91520aff68572d2fa5fba1dee56bb382dab784cacb5ceb2dc4d4c603

    SHA512

    1b008512b0ff5298005a3c74d65feba63b7c3bd5243c317536cbca879253f3456170555317800fbd7bd709e83c9e2d824af15d770da178af06a334f58f8d16a2

  • C:\Users\Admin\AppData\Local\Temp\wKGkj43WMqwGZhG.exe

    Filesize

    71KB

    MD5

    18bc6c19a0ee167f79ec2b48ed52be63

    SHA1

    4ba6ac9aad451d63d0632692f3e13e1eb17f2b73

    SHA256

    c39204ad20d101b8f7e75c824bbc679693614e6297e82b09a18fdf4a05fbca96

    SHA512

    247d8b6f27e6c97954dc2eabe156a3a6ddd6a8ff0dab3677dd792e7c55ff84fb94a4580524ab67d50c01ede8502a9f61b8ea7de4e935772a9d7c58d2c5cf46fa

  • C:\Windows\CTS.exe

    Filesize

    71KB

    MD5

    66df4ffab62e674af2e75b163563fc0b

    SHA1

    dec8a197312e41eeb3cfef01cb2a443f0205cd6e

    SHA256

    075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

    SHA512

    1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25