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Analysis

  • max time kernel
    142s
  • max time network
    123s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    05/03/2024, 06:47

General

  • Target

    b40dcdeb387d82b8061905dcc4d99599.exe

  • Size

    85KB

  • MD5

    b40dcdeb387d82b8061905dcc4d99599

  • SHA1

    0c69673b4a0f9daaa8fb5741f7267609768ff464

  • SHA256

    e771c5bef31c1955ee0e87e9220fe5d14db5507f28c46e92f0d4272daf233884

  • SHA512

    0a92a63572774edadbc832ea359c1576fbcd11db793f5ea73d6af35f7e6b7e3d0a1ab48213c09144be34951153d8b07c14ed9558175d3bcceadcaa95ad97a22c

  • SSDEEP

    1536:SKcR4mjD9r823FBBXVl/skYzGwG0Z9OivBtLy0+E8+khn7a1C+gx0XnIVOEJ8:SKcWmjRrz3tXjUdGj0Z9OivLWocEux7s

Malware Config

Signatures

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • UPX packed file 5 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops file in Windows directory 2 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b40dcdeb387d82b8061905dcc4d99599.exe
    "C:\Users\Admin\AppData\Local\Temp\b40dcdeb387d82b8061905dcc4d99599.exe"
    1⤵
    • Loads dropped DLL
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2356
    • C:\Users\Admin\AppData\Local\Temp\64gtx8KGuxCqj8y.exe
      C:\Users\Admin\AppData\Local\Temp\64gtx8KGuxCqj8y.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:2080
      • C:\Windows\Microsoft.NET\Framework64\v2.0.50727\dw20.exe
        dw20.exe -x -s 380
        3⤵
        • Suspicious behavior: GetForegroundWindowSpam
        PID:2644
    • 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:812

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Windows\CTS.exe

    Filesize

    29KB

    MD5

    70aa23c9229741a9b52e5ce388a883ac

    SHA1

    b42683e21e13de3f71db26635954d992ebe7119e

    SHA256

    9d25cc704b1c00c9d17903e25ca35c319663e997cb9da0b116790b639e9688f2

    SHA512

    be604a2ad5ab8a3e5edb8901016a76042ba873c8d05b4ef8eec31241377ec6b2a883b51c6912dc7640581ffa624547db334683975883ae74e62808b5ae9ab0b5

  • \Users\Admin\AppData\Local\Temp\64gtx8KGuxCqj8y.exe

    Filesize

    56KB

    MD5

    e115521ba14b75f53dcdff087ec6898f

    SHA1

    87103a892bb514a93d485fba221bacb9da3aae25

    SHA256

    59b284d0ad4c2634938e70fae67d9048bd98422d052fbd745a9b80b5fae7ae29

    SHA512

    ab3d097bcf11bf7327a28124052b210f5fb13b9bfb9b7376cae1ba5c30182a330506935288a7fe06b7e3fdd82b57f5c31638f1c301738342819c772b346fa35a

  • memory/812-20-0x0000000000030000-0x0000000000047000-memory.dmp

    Filesize

    92KB

  • memory/2080-17-0x000007FEF51E0000-0x000007FEF5B7D000-memory.dmp

    Filesize

    9.6MB

  • memory/2080-18-0x0000000000820000-0x00000000008A0000-memory.dmp

    Filesize

    512KB

  • memory/2080-21-0x000007FEF51E0000-0x000007FEF5B7D000-memory.dmp

    Filesize

    9.6MB

  • memory/2356-0-0x0000000000D80000-0x0000000000D97000-memory.dmp

    Filesize

    92KB

  • memory/2356-11-0x0000000000D80000-0x0000000000D97000-memory.dmp

    Filesize

    92KB

  • memory/2356-13-0x00000000000E0000-0x00000000000F7000-memory.dmp

    Filesize

    92KB

  • memory/2356-7-0x00000000000E0000-0x00000000000F7000-memory.dmp

    Filesize

    92KB

  • memory/2644-19-0x0000000000270000-0x0000000000271000-memory.dmp

    Filesize

    4KB