Analysis

  • max time kernel
    150s
  • max time network
    133s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    12-03-2024 23:35

General

  • Target

    $TEMP/syncUpd.exe

  • Size

    200KB

  • MD5

    c722591f624fb69970f246b8c81d830f

  • SHA1

    85516decea5d6987bebe39cbadf36053beaf4bb0

  • SHA256

    13cd1152a19fdac6581cac2bd822f34bd3026ea1783ff231e299b6d28c046a6a

  • SHA512

    822584c5c8a0813af4d845e80919776c71a43464ab719d1c303ebaae6a8ed47763183566bedc9be2e8c44de8ee6fd62d1e12be471e5d5c73ae4b1dcdaa34a908

  • SSDEEP

    3072:8PDOu5suCmavnBRsuP6GTdbB27zP6FtHPUxX1GOL3+:455zaPBRPPj27uPH8jzu

Malware Config

Extracted

Family

stealc

C2

http://185.172.128.145

Attributes
  • url_path

    /3cd2b41cbde8fc9c.php

Signatures

  • Stealc

    Stealc is an infostealer written in C++.

  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 3 IoCs
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • 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 WriteProcessMemory 20 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\$TEMP\syncUpd.exe
    "C:\Users\Admin\AppData\Local\Temp\$TEMP\syncUpd.exe"
    1⤵
    • Loads dropped DLL
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1936
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\KEHCAFHIJE.exe"
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:840
      • C:\Users\Admin\AppData\Local\Temp\KEHCAFHIJE.exe
        "C:\Users\Admin\AppData\Local\Temp\KEHCAFHIJE.exe"
        3⤵
        • Executes dropped EXE
        • Adds Run key to start application
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:328
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /C ping 2.2.2.2 -n 1 -w 3000 > Nul & Del C:\Users\Admin\AppData\Local\Temp\KEHCAFHIJE.exe
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:900
          • C:\Windows\SysWOW64\PING.EXE
            ping 2.2.2.2 -n 1 -w 3000
            5⤵
            • Runs ping.exe
            PID:2916
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\EHDHDHIECG.exe"
      2⤵
        PID:1476

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      101KB

      MD5

      42b838cf8bdf67400525e128d917f6e0

      SHA1

      a578f6faec738912dba8c41e7abe1502c46d0cae

      SHA256

      0e4ffba62ce9a464aa1b7ff9f1e55ace8f51ff1e15102d856f801a81f8b4607d

      SHA512

      f64b39d885375251ab7db72c57dc5b5095f0c6412169f1035d1f6a25b8415a2a01004d06bfa0267cf683ef7dea7a9f969ad43fde5a4376f1fcb65a57403433c0

    • \ProgramData\mozglue.dll

      Filesize

      593KB

      MD5

      c8fd9be83bc728cc04beffafc2907fe9

      SHA1

      95ab9f701e0024cedfbd312bcfe4e726744c4f2e

      SHA256

      ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

      SHA512

      fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

    • \ProgramData\nss3.dll

      Filesize

      2.0MB

      MD5

      1cc453cdf74f31e4d913ff9c10acdde2

      SHA1

      6e85eae544d6e965f15fa5c39700fa7202f3aafe

      SHA256

      ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

      SHA512

      dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

    • memory/328-139-0x00000000046B0000-0x00000000046F0000-memory.dmp

      Filesize

      256KB

    • memory/328-132-0x0000000072E60000-0x000000007354E000-memory.dmp

      Filesize

      6.9MB

    • memory/328-118-0x0000000000D90000-0x0000000000DAE000-memory.dmp

      Filesize

      120KB

    • memory/1476-134-0x0000000000570000-0x0000000000571000-memory.dmp

      Filesize

      4KB

    • memory/1936-70-0x0000000000400000-0x000000000063B000-memory.dmp

      Filesize

      2.2MB

    • memory/1936-96-0x0000000000400000-0x000000000063B000-memory.dmp

      Filesize

      2.2MB

    • memory/1936-44-0x0000000000270000-0x0000000000370000-memory.dmp

      Filesize

      1024KB

    • memory/1936-1-0x0000000000270000-0x0000000000370000-memory.dmp

      Filesize

      1024KB

    • memory/1936-81-0x0000000000400000-0x000000000063B000-memory.dmp

      Filesize

      2.2MB

    • memory/1936-86-0x0000000000400000-0x000000000063B000-memory.dmp

      Filesize

      2.2MB

    • memory/1936-93-0x0000000000400000-0x000000000063B000-memory.dmp

      Filesize

      2.2MB

    • memory/1936-51-0x0000000000400000-0x000000000063B000-memory.dmp

      Filesize

      2.2MB

    • memory/1936-99-0x0000000000270000-0x0000000000370000-memory.dmp

      Filesize

      1024KB

    • memory/1936-43-0x0000000000400000-0x000000000063B000-memory.dmp

      Filesize

      2.2MB

    • memory/1936-36-0x0000000000400000-0x000000000063B000-memory.dmp

      Filesize

      2.2MB

    • memory/1936-4-0x0000000061E00000-0x0000000061EF3000-memory.dmp

      Filesize

      972KB

    • memory/1936-3-0x0000000000400000-0x000000000063B000-memory.dmp

      Filesize

      2.2MB

    • memory/1936-2-0x0000000000640000-0x0000000000667000-memory.dmp

      Filesize

      156KB