Analysis

  • max time kernel
    120s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    25/04/2024, 04:20

General

  • Target

    2024-04-25_86a2089f6fe1947051453c55fdc3e99c_bkransomware.exe

  • Size

    71KB

  • MD5

    86a2089f6fe1947051453c55fdc3e99c

  • SHA1

    129ffd88c09da22faf46e572936e402f9c7ee22c

  • SHA256

    fcdee2cf79eaf19e606c077ea5f5b3244976f8d595a5650da18448fa05a78e02

  • SHA512

    9fefdea9157186d25315ea0a2f22c7ef691bddf3a04b6e71102c07175e82f4d0436c848e98d03eb77002a2c72d1a026306fbb62aaa80db60a23b3820f1b4a0cb

  • SSDEEP

    1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTp:ZhpAyazIlyazTp

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\2024-04-25_86a2089f6fe1947051453c55fdc3e99c_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-25_86a2089f6fe1947051453c55fdc3e99c_bkransomware.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2040
    • 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:1272

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\06ib7AgGkmcjb7C.exe

    Filesize

    71KB

    MD5

    2825207d82127e51e54a20d7830c6eaa

    SHA1

    4c4dddf67fce2cf273eb2b27f0e84f8f093494c3

    SHA256

    ad04b3df2e988b353db3e059598a25806e03c414c6ff7a0b597c82e7ed6c69d6

    SHA512

    e87cbabaab1111199557118619e01a97310f217806c74556cb958efc4a8afba1dee951316285d13009282fd35d6646d8b6319d556fc1e07a990ff923379923ec

  • C:\Windows\CTS.exe

    Filesize

    71KB

    MD5

    66df4ffab62e674af2e75b163563fc0b

    SHA1

    dec8a197312e41eeb3cfef01cb2a443f0205cd6e

    SHA256

    075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

    SHA512

    1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25