Analysis

  • max time kernel
    142s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230703-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/08/2023, 13:13

General

  • Target

    03eccfa5dea23fc185bcca277520d7ef473ff752649aac485ac055dd4111b2c1.exe

  • Size

    280KB

  • MD5

    789eaea81291addedd12202fac777c8a

  • SHA1

    a790504363ecbc2308e625a6a9fb6b4978a321fd

  • SHA256

    03eccfa5dea23fc185bcca277520d7ef473ff752649aac485ac055dd4111b2c1

  • SHA512

    a1a2fcd4025b65dfed3b1e8f05025889a76787ab75c757adc79c714140973634a485a06f421cfebbaa5bf4682b7ab687c38321fd3450ea63164ba4c22318197b

  • SSDEEP

    3072:ZtOpyD58tS/0MmL+JmSxT/fgd3fn8jJaVxmB+AEEb8jRMvw85oicKpSdBqI3:Ey6tG0MmLrSxT/oxaxB+AxHoi/SDn

Score
10/10

Malware Config

Extracted

Family

stealc

C2

http://adriaenclaeys.top/e9c345fc99a4e67e.php

Signatures

  • Stealc

    Stealc is an infostealer written in C++.

  • Downloads MZ/PE file
  • Loads dropped DLL 2 IoCs
  • 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
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 22 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\03eccfa5dea23fc185bcca277520d7ef473ff752649aac485ac055dd4111b2c1.exe
    "C:\Users\Admin\AppData\Local\Temp\03eccfa5dea23fc185bcca277520d7ef473ff752649aac485ac055dd4111b2c1.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:5100
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\03eccfa5dea23fc185bcca277520d7ef473ff752649aac485ac055dd4111b2c1.exe" & del "C:\ProgramData\*.dll"" & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4040
      • C:\Windows\SysWOW64\timeout.exe
        timeout /t 5
        3⤵
        • Delays execution with timeout.exe
        PID:3852
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 5100 -s 2596
      2⤵
      • Program crash
      PID:3924
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 5100 -ip 5100
    1⤵
      PID:4544

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          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\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

          • memory/5100-136-0x0000000000400000-0x0000000002435000-memory.dmp

            Filesize

            32.2MB

          • memory/5100-181-0x0000000004190000-0x00000000041A5000-memory.dmp

            Filesize

            84KB

          • memory/5100-185-0x00000000041D0000-0x00000000041EB000-memory.dmp

            Filesize

            108KB

          • memory/5100-186-0x0000000000400000-0x0000000002435000-memory.dmp

            Filesize

            32.2MB

          • memory/5100-190-0x0000000000400000-0x0000000002435000-memory.dmp

            Filesize

            32.2MB

          • memory/5100-137-0x0000000061E00000-0x0000000061EF3000-memory.dmp

            Filesize

            972KB

          • memory/5100-133-0x0000000004190000-0x00000000041A5000-memory.dmp

            Filesize

            84KB

          • memory/5100-135-0x0000000000400000-0x0000000002435000-memory.dmp

            Filesize

            32.2MB

          • memory/5100-134-0x00000000041D0000-0x00000000041EB000-memory.dmp

            Filesize

            108KB

          • memory/5100-224-0x0000000000400000-0x0000000002435000-memory.dmp

            Filesize

            32.2MB