Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    16-05-2024 01:42

General

  • Target

    a4b5ffd094143464cf7ba4df59bc6e60e09b03450d22cbdf1d3cb29dcf929979.exe

  • Size

    159KB

  • MD5

    ace1deab1fde445e65b7f6a6b1bf2e47

  • SHA1

    fc6286b9b0b5d55ffc10a045dd7cb652de6103bf

  • SHA256

    a4b5ffd094143464cf7ba4df59bc6e60e09b03450d22cbdf1d3cb29dcf929979

  • SHA512

    a440adbcd47c775c047f409655edba4e19190bd1f5dbd20b1af82212474ad6fbae153984b241e0627e73cf23f20521e435ad37c6e39e5d9f794d97a5cc4d58b7

  • SSDEEP

    3072:x7qLZmhWAc+eB1zQavj53G2pPH+knVojoA8HBoJgTWVM:xQAPevzQav122xjVAZ8mGTB

Malware Config

Signatures

  • Detects executables containing base64 encoded User Agent 7 IoCs
  • Blocklisted process makes network request 10 IoCs
  • ASPack v2.12-2.42 1 IoCs

    Detects executables packed with ASPack v2.12-2.42

  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 3 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.

  • 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 19 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a4b5ffd094143464cf7ba4df59bc6e60e09b03450d22cbdf1d3cb29dcf929979.exe
    "C:\Users\Admin\AppData\Local\Temp\a4b5ffd094143464cf7ba4df59bc6e60e09b03450d22cbdf1d3cb29dcf929979.exe"
    1⤵
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2960
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\ymkhc.exe "C:\Users\Admin\AppData\Local\Temp\a4b5ffd094143464cf7ba4df59bc6e60e09b03450d22cbdf1d3cb29dcf929979.exe"
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:3064
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 2
        3⤵
        • Runs ping.exe
        PID:1752
      • C:\Users\Admin\AppData\Local\Temp\ymkhc.exe
        C:\Users\Admin\AppData\Local\Temp\\ymkhc.exe "C:\Users\Admin\AppData\Local\Temp\a4b5ffd094143464cf7ba4df59bc6e60e09b03450d22cbdf1d3cb29dcf929979.exe"
        3⤵
        • Deletes itself
        • Executes dropped EXE
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2424
        • \??\c:\windows\SysWOW64\rundll32.exe
          c:\windows\system32\rundll32.exe "c:\txfsq\ztdrcwxs.trz",SHA1 C:\Users\Admin\AppData\Local\Temp\ymkhc.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)
          • Checks processor information in registry
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2240

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    159KB

    MD5

    5e0dec23ae6bfcfe5c2527bc5be00ec1

    SHA1

    61dc8f71019d941bf1ba015128c1d361d43609c9

    SHA256

    191457169461c871319ed2f012e64fd35c96b2b56c6b563e09f1eaf7fab92818

    SHA512

    2cc922c896eb9b8a08d9871223a1798021afaa27b43d00f7d563157862bd8c070bcde44872a82a88434c9aff579aae697d40dd9cbc16941c16eaf1b86f5b8d21

  • \??\c:\txfsq\ztdrcwxs.trz

    Filesize

    83KB

    MD5

    4993bd7ca91574843d5a608c532151a4

    SHA1

    72ff0d8e4ccee88738b3ab8bdb52b9474e0ef55e

    SHA256

    489855558b5a997477f7c95a05e7adcbf6001e06bd80e29b01fdabdb006cdbbb

    SHA512

    13418193723dace324d5b91a8162a09521640bc6e401c841bb0644de8ec9a762912f2afd588be8845a30b2f59ac10ab2eaa0b356068d1503792a30a826ed075c

  • memory/2240-8-0x0000000010000000-0x0000000010027000-memory.dmp

    Filesize

    156KB

  • memory/2240-9-0x0000000010000000-0x0000000010027000-memory.dmp

    Filesize

    156KB

  • memory/2240-11-0x0000000010000000-0x0000000010027000-memory.dmp

    Filesize

    156KB

  • memory/2240-12-0x0000000010024000-0x0000000010025000-memory.dmp

    Filesize

    4KB

  • memory/2240-10-0x0000000010000000-0x0000000010027000-memory.dmp

    Filesize

    156KB

  • memory/2240-13-0x0000000010000000-0x0000000010027000-memory.dmp

    Filesize

    156KB

  • memory/2240-17-0x0000000010000000-0x0000000010027000-memory.dmp

    Filesize

    156KB

  • memory/2240-18-0x0000000010000000-0x0000000010027000-memory.dmp

    Filesize

    156KB

  • memory/2240-19-0x0000000010000000-0x0000000010027000-memory.dmp

    Filesize

    156KB