Analysis

  • max time kernel
    146s
  • max time network
    158s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04-04-2024 20:15

General

  • Target

    82ce2fc01d4010cae7934b6069626dc80e8d593b0cfd73f2f748ce56754a897f.exe

  • Size

    202KB

  • MD5

    fce17f18a0524f4666e8259dc28f0ddf

  • SHA1

    264d92b4a5220e1175b7e1be83bb51315afc9c2d

  • SHA256

    82ce2fc01d4010cae7934b6069626dc80e8d593b0cfd73f2f748ce56754a897f

  • SHA512

    852c451326767d5c1d73fb7f36ff5f89756ddc0add5661f93cf1efd0b1ec71305f2fb4a71239baed22001d24cd7a823f4ab8c660bc89e22fed5cb993a22bac88

  • SSDEEP

    3072:CANnk671r1RbKzEzPfB+WhOKPu8v9ZQ4xUdAJIWH5xW6zReL6X:Cank6J1RVznoL8v9Zh2AJZTteQ

Malware Config

Extracted

Family

stealc

C2

http://185.172.128.209

Attributes
  • url_path

    /3cd2b41cbde8fc9c.php

Signatures

  • Buer

    Buer is a new modular loader first seen in August 2019.

  • Stealc

    Stealc is an infostealer written in C++.

  • Downloads MZ/PE file
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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\82ce2fc01d4010cae7934b6069626dc80e8d593b0cfd73f2f748ce56754a897f.exe
    "C:\Users\Admin\AppData\Local\Temp\82ce2fc01d4010cae7934b6069626dc80e8d593b0cfd73f2f748ce56754a897f.exe"
    1⤵
    • Checks computer location settings
    • Loads dropped DLL
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4260
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\GIJEGDAKEH.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:332
      • C:\Users\Admin\AppData\Local\Temp\GIJEGDAKEH.exe
        "C:\Users\Admin\AppData\Local\Temp\GIJEGDAKEH.exe"
        3⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:4816
        • 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\GIJEGDAKEH.exe
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:5092
          • C:\Windows\SysWOW64\PING.EXE
            ping 2.2.2.2 -n 1 -w 3000
            5⤵
            • Runs ping.exe
            PID:4028
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4260 -s 2296
      2⤵
      • Program crash
      PID:4140
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 4260 -ip 4260
    1⤵
      PID:1940

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\ProgramData\Are.docx

      Filesize

      11KB

      MD5

      a33e5b189842c5867f46566bdbf7a095

      SHA1

      e1c06359f6a76da90d19e8fd95e79c832edb3196

      SHA256

      5abf8e3d1f78de7b09d7f6fb87f9e80e60caacf13ef3c1289665653dacd7c454

      SHA512

      f2ad3812ec9b915e9618539b0f103f2e9acaad25fbbacd84941c954ce070af231324e83a4621e951c1dbae8d40d50410954e40dd52bbd46e34c54b0d1957407b

    • 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\GIJEGDAKEH.exe

      Filesize

      106KB

      MD5

      fe380780b5c35bd6d54541791151c2be

      SHA1

      7fe3a583cf91474c733f85cebf3c857682e269e1

      SHA256

      b64a84d1f88e4e78464a1901c1cb5bbd5f00bb73203d719e64e072157a087b53

      SHA512

      ba05ba8aa13c4bc1cf98fbf6c08b021e8b19354098e0397fc8e1e5d3dcce367c1063203f24e50d0973193f6535681d0a43486e5dade5d112853b7a2fe8739b6c

    • memory/4260-59-0x00000000048C0000-0x00000000048E7000-memory.dmp

      Filesize

      156KB

    • memory/4260-3-0x0000000000400000-0x0000000002B5D000-memory.dmp

      Filesize

      39.4MB

    • memory/4260-45-0x0000000002D20000-0x0000000002E20000-memory.dmp

      Filesize

      1024KB

    • memory/4260-58-0x0000000000400000-0x0000000002B5D000-memory.dmp

      Filesize

      39.4MB

    • memory/4260-1-0x0000000002D20000-0x0000000002E20000-memory.dmp

      Filesize

      1024KB

    • memory/4260-5-0x0000000000400000-0x0000000002B5D000-memory.dmp

      Filesize

      39.4MB

    • memory/4260-4-0x0000000000400000-0x0000000002B5D000-memory.dmp

      Filesize

      39.4MB

    • memory/4260-6-0x0000000061E00000-0x0000000061EF3000-memory.dmp

      Filesize

      972KB

    • memory/4260-89-0x0000000000400000-0x0000000002B5D000-memory.dmp

      Filesize

      39.4MB

    • memory/4260-2-0x00000000048C0000-0x00000000048E7000-memory.dmp

      Filesize

      156KB

    • memory/4260-102-0x0000000000400000-0x0000000002B5D000-memory.dmp

      Filesize

      39.4MB

    • memory/4816-97-0x0000000071AA0000-0x0000000072250000-memory.dmp

      Filesize

      7.7MB

    • memory/4816-98-0x0000000004810000-0x0000000004820000-memory.dmp

      Filesize

      64KB

    • memory/4816-101-0x0000000071AA0000-0x0000000072250000-memory.dmp

      Filesize

      7.7MB

    • memory/4816-96-0x0000000000010000-0x0000000000030000-memory.dmp

      Filesize

      128KB