Analysis

  • max time kernel
    93s
  • max time network
    99s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240611-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13-06-2024 03:45

General

  • Target

    2024-06-13_9a9168e5de25fc2ff66702805cb63db4_bkransomware.exe

  • Size

    71KB

  • MD5

    9a9168e5de25fc2ff66702805cb63db4

  • SHA1

    a1b6b0fd7f88f08fd2c73c00dedda115d726e8f9

  • SHA256

    e101f7550db0f220224e846a6a14da87450d2e401af676dc98c45aaf1cb22404

  • SHA512

    13f001d00f44bcca8f74b06d9ce0fdc5889453f4720d3ab2c3a556fc5ee9877a15d2fee48890b66d8fdf7fa074f1bf7c227c6850566f7621f8b0105e142d83ab

  • SSDEEP

    1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTO:ZhpAyazIlyazTO

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\2024-06-13_9a9168e5de25fc2ff66702805cb63db4_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-13_9a9168e5de25fc2ff66702805cb63db4_bkransomware.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3000
    • 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:220

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

    392KB

    MD5

    588378ecff439c4526c7e4c52c08ef9a

    SHA1

    7c07db303e1b9a752f89b4d5d66ee199ddc27b41

    SHA256

    1433f659bae2a21a46f4c15c72d38c5158668ef90e838eabe01545d36edbfc11

    SHA512

    95d58898236bb3803766762c246f160a7a81703f7a30c661a29a10a7a2f5127c6da8393f0eda964ba82527dc19d6413535f515091ee5717b200b9f06247cfd59

  • C:\Users\Admin\AppData\Local\Temp\o59F1Hlo5AJliII.exe

    Filesize

    71KB

    MD5

    b675ec69f7f2680f089b5322df4af297

    SHA1

    14966fce605fb22d9e335066be00791f8ac7fb3c

    SHA256

    492897401b2144711f7f6539e3165acde52912029c51520bb243c21274a4617d

    SHA512

    16284705a8d6d33232c804a3290fbde565b89044d5e56d00ed165ae22352d304d3228871e263d6b91e5a0aac226f57cf3da794ebf7dfcf218a6a9e21326ea3ed

  • C:\Windows\CTS.exe

    Filesize

    71KB

    MD5

    66df4ffab62e674af2e75b163563fc0b

    SHA1

    dec8a197312e41eeb3cfef01cb2a443f0205cd6e

    SHA256

    075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

    SHA512

    1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25