Analysis

  • max time kernel
    140s
  • max time network
    123s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    04-06-2024 01:01

General

  • Target

    a27f261c595fb0040e689a76ccddd1407f7dae0badacedbc8647f1728990b77f.exe

  • Size

    91KB

  • MD5

    3d0540f21135b4ae6f6835eec3479053

  • SHA1

    4c630e0a53a18706dccfbc6752ec5b6837514533

  • SHA256

    a27f261c595fb0040e689a76ccddd1407f7dae0badacedbc8647f1728990b77f

  • SHA512

    4d1e4795aea29aba27c29f97579d66fba42ca37361e1a877d3eba3961bd01314bbd038490c877095092fb4d03beba7dc8e17198e192a692feec4d568a58d689d

  • SSDEEP

    1536:N5VzcfA/6LrVpL74gfh16ntnY3WBJsVICh2FxixCUh6+ghR2LG+Loz8RXLNZngIL:/V2A/gVh74gpg63W+22XDgD2a+LH5LPP

Malware Config

Signatures

  • UPX dump on OEP (original entry point) 5 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 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 use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a27f261c595fb0040e689a76ccddd1407f7dae0badacedbc8647f1728990b77f.exe
    "C:\Users\Admin\AppData\Local\Temp\a27f261c595fb0040e689a76ccddd1407f7dae0badacedbc8647f1728990b77f.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:1728
    • C:\Users\Admin\AppData\Local\Temp\FsmWysgMwmTWXAZ.exe
      C:\Users\Admin\AppData\Local\Temp\FsmWysgMwmTWXAZ.exe
      2⤵
      • Executes dropped EXE
      PID:2012
    • 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:2052

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Windows\CTS.exe

    Filesize

    27KB

    MD5

    a6749b968461644db5cc0ecceffb224a

    SHA1

    2795aa37b8586986a34437081351cdd791749a90

    SHA256

    720023737d7ff700818f55612ba069a609a5ddea646bb3509b615ee3523a4ca2

    SHA512

    2a276816290746ed914af9cf6427aef31ce9395b8e9937090e329a8f74fb84c62d15b196e13346caa086842b3f5f549b9eb20cbf422d18c9c1b63e6342ea90b4

  • \Users\Admin\AppData\Local\Temp\FsmWysgMwmTWXAZ.exe

    Filesize

    64KB

    MD5

    ae6ce17005c63b7e9bf15a2a21abb315

    SHA1

    9b6bdfb9d648fa422f54ec07b8c8ea70389c09eb

    SHA256

    4a3387a54eeca83f3a8ff1f5f282f7966c9e7bfe159c8eb45444cab01b3e167e

    SHA512

    c883a5f599540d636efc8c0abc05aab7bad0aa1b10ab507f43f18e0fba905a10b94ff2f1ba10ae0fee15cc1b90a165a768dc078fda0ac27474f0eef66f6a11af

  • memory/1728-0-0x0000000000B20000-0x0000000000B38000-memory.dmp

    Filesize

    96KB

  • memory/1728-15-0x0000000000B20000-0x0000000000B38000-memory.dmp

    Filesize

    96KB

  • memory/2052-17-0x0000000000FD0000-0x0000000000FE8000-memory.dmp

    Filesize

    96KB

  • memory/2052-22-0x0000000000FD0000-0x0000000000FE8000-memory.dmp

    Filesize

    96KB