Analysis

  • max time kernel
    146s
  • max time network
    149s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240221-en
  • resource tags

    arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    03/04/2024, 12:30

General

  • Target

    495286cf4a06a306c3774ab6eaa7293c7e3ee8bdd86137474fc914068301233c.exe

  • Size

    289KB

  • MD5

    72ee6a5701ee0375067323f10fef62ff

  • SHA1

    6e95611270d933a58111f01c3b08e2d08c77fb81

  • SHA256

    495286cf4a06a306c3774ab6eaa7293c7e3ee8bdd86137474fc914068301233c

  • SHA512

    5d5e0bf455d82e43580ac729c98a73c6eb202b33b46e0ed255ae956e913715dbe8d64d1a64a1e30550062ad89c754776b1703160141434d634cbdfdc258847a1

  • SSDEEP

    3072:k4D0MM9wBZa0WkPhJ+KUsIh2aW1xmE7QbPIOB8OUiUuisRavkNxMaYK/HGB/itMU:kJJK3DfzosxubPCTiUuL3EBKvGpiMT

Malware Config

Extracted

Family

stealc

C2

http://185.172.128.26

Attributes
  • url_path

    /f993692117a3fda2.php

Signatures

  • Stealc

    Stealc is an infostealer written in C++.

  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 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
  • 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).

  • Program crash 1 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 4 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\495286cf4a06a306c3774ab6eaa7293c7e3ee8bdd86137474fc914068301233c.exe
    "C:\Users\Admin\AppData\Local\Temp\495286cf4a06a306c3774ab6eaa7293c7e3ee8bdd86137474fc914068301233c.exe"
    1⤵
    • Loads dropped DLL
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:2992
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\FHJKKECFIE.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2220
      • C:\Users\Admin\AppData\Local\Temp\FHJKKECFIE.exe
        "C:\Users\Admin\AppData\Local\Temp\FHJKKECFIE.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:4500
        • 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\FHJKKECFIE.exe
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:2948
          • C:\Windows\SysWOW64\PING.EXE
            ping 2.2.2.2 -n 1 -w 3000
            5⤵
            • Runs ping.exe
            PID:2868
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2992 -s 2428
      2⤵
      • Program crash
      PID:2976
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 2992 -ip 2992
    1⤵
      PID:2064

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\ProgramData\mozglue.dll

            Filesize

            593KB

            MD5

            c8fd9be83bc728cc04beffafc2907fe9

            SHA1

            95ab9f701e0024cedfbd312bcfe4e726744c4f2e

            SHA256

            ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

            SHA512

            fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

          • C:\ProgramData\nss3.dll

            Filesize

            2.0MB

            MD5

            1cc453cdf74f31e4d913ff9c10acdde2

            SHA1

            6e85eae544d6e965f15fa5c39700fa7202f3aafe

            SHA256

            ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

            SHA512

            dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

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

            Filesize

            106KB

            MD5

            fe380780b5c35bd6d54541791151c2be

            SHA1

            7fe3a583cf91474c733f85cebf3c857682e269e1

            SHA256

            b64a84d1f88e4e78464a1901c1cb5bbd5f00bb73203d719e64e072157a087b53

            SHA512

            ba05ba8aa13c4bc1cf98fbf6c08b021e8b19354098e0397fc8e1e5d3dcce367c1063203f24e50d0973193f6535681d0a43486e5dade5d112853b7a2fe8739b6c

          • memory/2992-75-0x0000000000400000-0x0000000000866000-memory.dmp

            Filesize

            4.4MB

          • memory/2992-4-0x0000000061E00000-0x0000000061EF3000-memory.dmp

            Filesize

            972KB

          • memory/2992-3-0x0000000000400000-0x0000000000866000-memory.dmp

            Filesize

            4.4MB

          • memory/2992-1-0x0000000000BD0000-0x0000000000CD0000-memory.dmp

            Filesize

            1024KB

          • memory/2992-2-0x00000000026B0000-0x00000000026D7000-memory.dmp

            Filesize

            156KB

          • memory/2992-99-0x0000000000400000-0x0000000000866000-memory.dmp

            Filesize

            4.4MB

          • memory/4500-95-0x0000000000FA0000-0x0000000000FC0000-memory.dmp

            Filesize

            128KB

          • memory/4500-96-0x0000000071D30000-0x00000000724E1000-memory.dmp

            Filesize

            7.7MB

          • memory/4500-97-0x0000000005A10000-0x0000000005A20000-memory.dmp

            Filesize

            64KB

          • memory/4500-101-0x0000000071D30000-0x00000000724E1000-memory.dmp

            Filesize

            7.7MB