Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11-06-2024 13:33

General

  • Target

    3f77bf57e73ac007bf7d0f0795b250f902a3d4575309b8b7f6949e689809a03e.exe

  • Size

    407KB

  • MD5

    c4a1fb9ad37a19f01a4736ff89bf0043

  • SHA1

    0e8cee769e085598da36bd734dff41ec30725122

  • SHA256

    3f77bf57e73ac007bf7d0f0795b250f902a3d4575309b8b7f6949e689809a03e

  • SHA512

    b75229d18e4f5ac326fe7f687ca6f3dd1838056ae17126d84e5112b3df7e9ce2702903162e5447f0c0605cbd393bb5e29b865685617e7d1de801358f1900cef7

  • SSDEEP

    6144:3w9D91dOrcN3ZGXNYFNmIkYvUIelVjjVtGRyFH4C:gtRfJcNYFNm8UhlZGseC

Malware Config

Signatures

  • Blocklisted process makes network request 8 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 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.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates connected drives 3 TTPs 23 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3f77bf57e73ac007bf7d0f0795b250f902a3d4575309b8b7f6949e689809a03e.exe
    "C:\Users\Admin\AppData\Local\Temp\3f77bf57e73ac007bf7d0f0795b250f902a3d4575309b8b7f6949e689809a03e.exe"
    1⤵
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2828
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\ldkny.exe "C:\Users\Admin\AppData\Local\Temp\3f77bf57e73ac007bf7d0f0795b250f902a3d4575309b8b7f6949e689809a03e.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4680
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 2
        3⤵
        • Runs ping.exe
        PID:5028
      • C:\Users\Admin\AppData\Local\Temp\ldkny.exe
        C:\Users\Admin\AppData\Local\Temp\\ldkny.exe "C:\Users\Admin\AppData\Local\Temp\3f77bf57e73ac007bf7d0f0795b250f902a3d4575309b8b7f6949e689809a03e.exe"
        3⤵
        • Deletes itself
        • Executes dropped EXE
        • Drops file in Program Files directory
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:4604
        • \??\c:\windows\SysWOW64\rundll32.exe
          c:\windows\system32\rundll32.exe "c:\Program Files\ktdld\fqoyvvkjh.dll",Verify C:\Users\Admin\AppData\Local\Temp\ldkny.exe
          4⤵
          • Blocklisted process makes network request
          • Loads dropped DLL
          • Adds Run key to start application
          • Enumerates connected drives
          • Writes to the Master Boot Record (MBR)
          • Suspicious use of NtSetInformationThreadHideFromDebugger
          • Checks processor information in registry
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:3056

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    407KB

    MD5

    d4d8f3c14503b2fd1dd4cdf1a364144e

    SHA1

    dc85ca47f137ddb1ed0a1a3adc12530968527962

    SHA256

    09893e1d01c39d1ea0aefc8234191d36fb0dcc2ba34b1e7b308198bf6cbca61e

    SHA512

    21fbbd22cb4ab9c20917c70ab5d37bd1c63803f1a4d6172cdd3cea82d87bcc323ccb0369fffec788b2d05db8f9ce2e501a2703d08064aaf48157975585900a3e

  • \??\c:\Program Files\ktdld\fqoyvvkjh.dll

    Filesize

    228KB

    MD5

    57ac4d364a5436a806eae740f1e0df97

    SHA1

    b31a74fb245c04da38f55ea7ce23ac97610f3401

    SHA256

    12aabe683943662cefa082b31dd43584599ca707b5f405c661c8c60f8e838393

    SHA512

    e5176b0e9f43852fe3f027ee708c06561be1583c611bcbeb1d88f7ad9e0d86c339dbb92108ca8f3bd232391a7e77e6999b4d08b5fa1ecfc49a0c0a070d4af707

  • memory/2828-0-0x0000000000400000-0x0000000000464000-memory.dmp

    Filesize

    400KB

  • memory/2828-2-0x0000000000400000-0x0000000000464000-memory.dmp

    Filesize

    400KB

  • memory/3056-10-0x0000000010000000-0x0000000010080000-memory.dmp

    Filesize

    512KB

  • memory/3056-11-0x0000000010000000-0x0000000010080000-memory.dmp

    Filesize

    512KB

  • memory/3056-13-0x0000000010000000-0x0000000010080000-memory.dmp

    Filesize

    512KB

  • memory/4604-7-0x0000000000400000-0x0000000000464000-memory.dmp

    Filesize

    400KB