Analysis

  • max time kernel
    148s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/04/2024, 12:30

General

  • Target

    c975efca05f5c6f2abc2491a6f8d3d498438622d045c7370bf6d68a53e0241a7.exe

  • Size

    289KB

  • MD5

    9105a03d2ead89d612c53f1dc322eb9e

  • SHA1

    af3d72c0f399ba16b678910e21eb04e8e6122bee

  • SHA256

    c975efca05f5c6f2abc2491a6f8d3d498438622d045c7370bf6d68a53e0241a7

  • SHA512

    4dd290c0ce5fd4414600f3c869a6ee6fba2c7b8ec856d6aed0dffb17253eb0c37b4945d2c5881d1fc40547c8f1b1ef22e63fce229ebfc19022e44b8ee87b2fcf

  • SSDEEP

    3072:UQD00x0AahwC24HfNbt+zUUgFD2gpoi/0ql7Hhg0iNmFyTUCX/itMTQ:UBI09hLD/3BhLpuqI5HPiMT

Malware Config

Extracted

Family

stealc

C2

http://185.172.128.209

Attributes
  • url_path

    /3cd2b41cbde8fc9c.php

Signatures

  • 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\c975efca05f5c6f2abc2491a6f8d3d498438622d045c7370bf6d68a53e0241a7.exe
    "C:\Users\Admin\AppData\Local\Temp\c975efca05f5c6f2abc2491a6f8d3d498438622d045c7370bf6d68a53e0241a7.exe"
    1⤵
    • Checks computer location settings
    • Loads dropped DLL
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:2352
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\HCFBKKEBKE.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2392
      • C:\Users\Admin\AppData\Local\Temp\HCFBKKEBKE.exe
        "C:\Users\Admin\AppData\Local\Temp\HCFBKKEBKE.exe"
        3⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:4164
        • 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\HCFBKKEBKE.exe
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:3248
          • C:\Windows\SysWOW64\PING.EXE
            ping 2.2.2.2 -n 1 -w 3000
            5⤵
            • Runs ping.exe
            PID:1100
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2352 -s 2348
      2⤵
      • Program crash
      PID:4800
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 2352 -ip 2352
    1⤵
      PID:3892

    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\HCFBKKEBKE.exe

            Filesize

            106KB

            MD5

            fe380780b5c35bd6d54541791151c2be

            SHA1

            7fe3a583cf91474c733f85cebf3c857682e269e1

            SHA256

            b64a84d1f88e4e78464a1901c1cb5bbd5f00bb73203d719e64e072157a087b53

            SHA512

            ba05ba8aa13c4bc1cf98fbf6c08b021e8b19354098e0397fc8e1e5d3dcce367c1063203f24e50d0973193f6535681d0a43486e5dade5d112853b7a2fe8739b6c

          • memory/2352-4-0x0000000061E00000-0x0000000061EF3000-memory.dmp

            Filesize

            972KB

          • memory/2352-1-0x0000000000A00000-0x0000000000B00000-memory.dmp

            Filesize

            1024KB

          • memory/2352-3-0x0000000000400000-0x0000000000866000-memory.dmp

            Filesize

            4.4MB

          • memory/2352-80-0x0000000000400000-0x0000000000866000-memory.dmp

            Filesize

            4.4MB

          • memory/2352-2-0x0000000000940000-0x0000000000967000-memory.dmp

            Filesize

            156KB

          • memory/2352-93-0x0000000000400000-0x0000000000866000-memory.dmp

            Filesize

            4.4MB

          • memory/4164-87-0x0000000000AC0000-0x0000000000AE0000-memory.dmp

            Filesize

            128KB

          • memory/4164-88-0x0000000072990000-0x0000000073140000-memory.dmp

            Filesize

            7.7MB

          • memory/4164-89-0x0000000003090000-0x00000000030A0000-memory.dmp

            Filesize

            64KB

          • memory/4164-92-0x0000000072990000-0x0000000073140000-memory.dmp

            Filesize

            7.7MB