Analysis

  • max time kernel
    133s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30/05/2024, 23:24

General

  • Target

    2024-05-30_490a955172e90c8fb03c0272a91c1028_bkransomware.exe

  • Size

    71KB

  • MD5

    490a955172e90c8fb03c0272a91c1028

  • SHA1

    7d2861751bd7c46663043f3d815d3b28af850d89

  • SHA256

    968e3fac7b477dfa7b0064ddd254e63155a20eced174f1d63d5b8a404c89ca33

  • SHA512

    428d86c847dcaf287c7450f4e16f88e7184c8ab0d1f4df53c3ea119828fefa2ecc322f82570c3ea5283e657c3b8f951825fa7fe1867e67e9706479142f4d819c

  • SSDEEP

    1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTb:ZRpAyazIliazTb

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\2024-05-30_490a955172e90c8fb03c0272a91c1028_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-30_490a955172e90c8fb03c0272a91c1028_bkransomware.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2312
    • 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:3100

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

          c3fdda17102fa9110b8051036612d99f

          SHA1

          fc0cbe8e38267de9cf362997ff55237dc8bfc160

          SHA256

          97a0ed8eb041ba88f70776955322e5dab2dd935ddb47787ac7fc93c8259c07a2

          SHA512

          5b2f20889ffcac7928f9d0b8f36a80da85a040c55552e42d021120c4aeae35b00bbc77628d24e387b43e2a8d7bf5db96a7a3b051fafccb05e49359fb4eb571d9

        • C:\Users\Admin\AppData\Local\Temp\S57tQx7cUBMmzed.exe

          Filesize

          71KB

          MD5

          00421a83c4d8d9f78bc025adde1c6fa9

          SHA1

          e258562cbae75574ff5bdedcf113876520b83558

          SHA256

          0c2167d8d5c4533bab3351a2a02b378156c77231e2ccb8347bc50cb1e5f5923d

          SHA512

          f732859892f7c3e7b9f2a76416089012bcbb4dff006ca3b0c1a76cb38470a89d5bb59ecde92ebbec71bedd021fb2f253ad91c946d8a0927b04957012d10a1916

        • C:\Windows\CTS.exe

          Filesize

          71KB

          MD5

          f9d4ab0a726adc9b5e4b7d7b724912f1

          SHA1

          3d42ca2098475924f70ee4a831c4f003b4682328

          SHA256

          b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

          SHA512

          22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432