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Analysis

  • max time kernel
    127s
  • max time network
    132s
  • platform
    windows10-1703_x64
  • resource
    win10-20230915-en
  • resource tags

    arch:x64arch:x86image:win10-20230915-enlocale:en-usos:windows10-1703-x64system
  • submitted
    16/10/2023, 05:06

General

  • Target

    89e4b73817aa05f9f99ec762a1c622021a7bbf20dc854dc3988bd3a06f22437f.exe

  • Size

    262KB

  • MD5

    164c9c81271b7c25d900b74e6eef8038

  • SHA1

    7ef43c27a32faae23f47f8c93c44ed065a558476

  • SHA256

    89e4b73817aa05f9f99ec762a1c622021a7bbf20dc854dc3988bd3a06f22437f

  • SHA512

    4c4f925aed36d0b4f09165c19744ec24feee78487af05615ec4615d900c83c0176c80abdf52a2e4771ab91ce201d00cb0db62811c870609cac5ea8f1ec243852

  • SSDEEP

    3072:fBNXO1mXe60TK2z9zmbBuV56Uclyp8Z/IuR9pwpbH2UN+SIZRnpCkXi:ZhX90e2z9zmbgVMWI/IuR9uJH/oSQlp

Malware Config

Extracted

Family

stealc

C2

http://aidandylan.top

Attributes
  • url_path

    /3886d2276f6914c4.php

rc4.plain

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
  • 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.

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\89e4b73817aa05f9f99ec762a1c622021a7bbf20dc854dc3988bd3a06f22437f.exe
    "C:\Users\Admin\AppData\Local\Temp\89e4b73817aa05f9f99ec762a1c622021a7bbf20dc854dc3988bd3a06f22437f.exe"
    1⤵
    • Loads dropped DLL
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:2956
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\89e4b73817aa05f9f99ec762a1c622021a7bbf20dc854dc3988bd3a06f22437f.exe" & del "C:\ProgramData\*.dll"" & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:5052
      • C:\Windows\SysWOW64\timeout.exe
        timeout /t 5
        3⤵
        • Delays execution with timeout.exe
        PID:2468

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

  • \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/2956-1-0x00000000008B0000-0x00000000009B0000-memory.dmp

    Filesize

    1024KB

  • memory/2956-2-0x0000000000400000-0x00000000007CC000-memory.dmp

    Filesize

    3.8MB

  • memory/2956-3-0x00000000023B0000-0x00000000023CB000-memory.dmp

    Filesize

    108KB

  • memory/2956-4-0x0000000061E00000-0x0000000061EF3000-memory.dmp

    Filesize

    972KB

  • memory/2956-59-0x00000000008B0000-0x00000000009B0000-memory.dmp

    Filesize

    1024KB

  • memory/2956-60-0x0000000000400000-0x00000000007CC000-memory.dmp

    Filesize

    3.8MB

  • memory/2956-61-0x0000000000400000-0x00000000007CC000-memory.dmp

    Filesize

    3.8MB

  • memory/2956-70-0x0000000000400000-0x00000000007CC000-memory.dmp

    Filesize

    3.8MB