Analysis

  • max time kernel
    259s
  • max time network
    260s
  • platform
    windows10-1703_x64
  • resource
    win10-20240404-en
  • resource tags

    arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
  • submitted
    29-04-2024 12:34

General

  • Target

    fa38bc50e82c0b00890b3234017ee1c0446f48114e700717f69d12dfb5c7d043.exe

  • Size

    347KB

  • MD5

    5ec61087c62b7253d45b72e19c096b5f

  • SHA1

    90658f4eec68c48a2764acdd86d4ebf8757a27d3

  • SHA256

    fa38bc50e82c0b00890b3234017ee1c0446f48114e700717f69d12dfb5c7d043

  • SHA512

    71c3071214ac76f9a98c9a86eeb9234c28630a44d533714b85dce8867641de18db7283d4995bfd773434f03646fcd1ab3b79e65ad0210d79c9a5e4f670ca736a

  • SSDEEP

    6144:8o+4WgjZb/JFOtrrcQfDowFsTPgZvaRGbmDgAsWrJhUN5m8BO:5ZjZb/JfQboRTAvaYykBAfF

Malware Config

Extracted

Family

stealc

C2

http://185.172.128.151

Attributes
  • url_path

    /7043a0c6a68d9c65.php

Signatures

  • Detects Arechclient2 RAT 1 IoCs

    Arechclient2.

  • SectopRAT

    SectopRAT is a remote access trojan first seen in November 2019.

  • SectopRAT payload 1 IoCs
  • Stealc

    Stealc is an infostealer written in C++.

  • Downloads MZ/PE file
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 3 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.

  • Suspicious use of SetThreadContext 2 IoCs
  • 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.

  • Suspicious behavior: EnumeratesProcesses 9 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\fa38bc50e82c0b00890b3234017ee1c0446f48114e700717f69d12dfb5c7d043.exe
    "C:\Users\Admin\AppData\Local\Temp\fa38bc50e82c0b00890b3234017ee1c0446f48114e700717f69d12dfb5c7d043.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3404
    • C:\Users\Admin\AppData\Local\Temp\u2mk.0.exe
      "C:\Users\Admin\AppData\Local\Temp\u2mk.0.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:1280
    • C:\Users\Admin\AppData\Local\Temp\u2mk.2\run.exe
      "C:\Users\Admin\AppData\Local\Temp\u2mk.2\run.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:4312
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\SysWOW64\cmd.exe
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of WriteProcessMemory
        PID:376
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
          C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          PID:4688

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:\Users\Admin\AppData\Local\Temp\e16f72b6

    Filesize

    1.4MB

    MD5

    cc902d4651c18699edd7076c9dd6b343

    SHA1

    a50c1cde18d5f84375aedb816cf24bcdb367eb7e

    SHA256

    5b557d8202f564e9a638953327956e3e6c1084d4116d59c9cf78cd87ab4f1ec3

    SHA512

    8918fc782078a18dbce525c3b5f315904761088f43bdf4ea41f2e1914fe8cd4bccad1e62374dbc5ff0e1b35fef005715ec4733c0aab9c016e702660adc3070fb

  • C:\Users\Admin\AppData\Local\Temp\tmp106.tmp

    Filesize

    20KB

    MD5

    c9ff7748d8fcef4cf84a5501e996a641

    SHA1

    02867e5010f62f97ebb0cfb32cb3ede9449fe0c9

    SHA256

    4d3f3194cb1133437aa69bb880c8cbb55ddf06ff61a88ca6c3f1bbfbfd35d988

    SHA512

    d36054499869a8f56ac8547ccd5455f1252c24e17d2b185955390b32da7e2a732ace4e0f30f9493fcc61425a2e31ed623465f998f41af69423ee0e3ed1483a73

  • C:\Users\Admin\AppData\Local\Temp\u2mk.0.exe

    Filesize

    203KB

    MD5

    11c11c214731f0346cb9733eb7f9f0b6

    SHA1

    8cf0db84222c4be556b4fb9e9927454540258eac

    SHA256

    d75944f20168d0585058bd5b7035c79c4728cda469bf1edee6f62bfd2847ea67

    SHA512

    f3eca4e0496f1e017f43bc29ecda5dba11b1b00638bd3538d9995ea49706db66f0e839e5fd8e980bf172561d11da2d1530462b395c89479737fa31fce1bebb42

  • C:\Users\Admin\AppData\Local\Temp\u2mk.1.zip

    Filesize

    3.7MB

    MD5

    78d3ca6355c93c72b494bb6a498bf639

    SHA1

    2fa4e5df74bfe75c207c881a1b0d3bc1c62c8b0e

    SHA256

    a1dd547a63b256aa6a16871ed03f8b025226f7617e67b8817a08444df077b001

    SHA512

    1b2df7bee2514aee7efd3579f5dd33c76b40606d07dba69a34c45747662fad61174db4931bca02b058830107959205e889fee74f8ccc9f6e03f9fd111761f4ea

  • C:\Users\Admin\AppData\Local\Temp\u2mk.2\UIxMarketPlugin.dll

    Filesize

    1.6MB

    MD5

    d1ba9412e78bfc98074c5d724a1a87d6

    SHA1

    0572f98d78fb0b366b5a086c2a74cc68b771d368

    SHA256

    cbcea8f28d8916219d1e8b0a8ca2db17e338eb812431bc4ad0cb36c06fd67f15

    SHA512

    8765de36d3824b12c0a4478c31b985878d4811bd0e5b6fba4ea07f8c76340bd66a2da3490d4871b95d9a12f96efc25507dfd87f431de211664dbe9a9c914af6f

  • C:\Users\Admin\AppData\Local\Temp\u2mk.2\bunch.dat

    Filesize

    1.3MB

    MD5

    1e8237d3028ab52821d69099e0954f97

    SHA1

    30a6ae353adda0c471c6ed5b7a2458b07185abf2

    SHA256

    9387488f9d338e211be2cb45109bf590a5070180bc0d4a703f70d3cb3c4e1742

    SHA512

    a6406d7c18694ee014d59df581f1f76e980b68e3361ae680dc979606a423eba48d35e37f143154dd97fe5f066baf0ea51a2e9f8bc822d593e1cba70ead6559f3

  • C:\Users\Admin\AppData\Local\Temp\u2mk.2\relay.dll

    Filesize

    1.5MB

    MD5

    10d51becd0bbce0fab147ff9658c565e

    SHA1

    4689a18112ff876d3c066bc8c14a08fd6b7b7a4a

    SHA256

    7b2db9c88f60ed6dd24b1dec321a304564780fdb191a96ec35c051856128f1ed

    SHA512

    29faf493bb28f7842c905adc5312f31741effb09f841059b53d73b22aea2c4d41d73db10bbf37703d6aeb936ffacbc756a3cc85ba3c0b6a6863ef4d27fefcd29

  • C:\Users\Admin\AppData\Local\Temp\u2mk.2\run.exe

    Filesize

    2.4MB

    MD5

    9fb4770ced09aae3b437c1c6eb6d7334

    SHA1

    fe54b31b0db8665aa5b22bed147e8295afc88a03

    SHA256

    a05b592a971fe5011554013bcfe9a4aaf9cfc633bdd1fe3a8197f213d557b8d3

    SHA512

    140fee6daf23fe8b7e441b3b4de83554af804f00ecedc421907a385ac79a63164bd9f28b4be061c2ea2262755d85e14d3a8e7dc910547837b664d78d93667256

  • C:\Users\Admin\AppData\Local\Temp\u2mk.2\whale.dbf

    Filesize

    85KB

    MD5

    a723bf46048e0bfb15b8d77d7a648c3e

    SHA1

    8952d3c34e9341e4425571e10f22b782695bb915

    SHA256

    b440170853bdb43b66497f701aee2901080326975140b095a1669cb9dee13422

    SHA512

    ca8ea2f7f3c7af21b5673a0a3f2611b6580a7ed02efa2cfd8b343eb644ff09682bde43b25ef7aab68530d5ce31dcbd252c382dd336ecb610d4c4ebde78347273

  • \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/376-102-0x00007FFFC8460000-0x00007FFFC863B000-memory.dmp

    Filesize

    1.9MB

  • memory/376-165-0x0000000072220000-0x000000007239B000-memory.dmp

    Filesize

    1.5MB

  • memory/1280-104-0x0000000061E00000-0x0000000061EF3000-memory.dmp

    Filesize

    972KB

  • memory/1280-164-0x0000000000400000-0x0000000002AF0000-memory.dmp

    Filesize

    38.9MB

  • memory/3404-91-0x0000000000400000-0x0000000002B15000-memory.dmp

    Filesize

    39.1MB

  • memory/3404-1-0x0000000002C00000-0x0000000002D00000-memory.dmp

    Filesize

    1024KB

  • memory/3404-86-0x00000000047E0000-0x000000000484D000-memory.dmp

    Filesize

    436KB

  • memory/3404-3-0x0000000000400000-0x0000000002B15000-memory.dmp

    Filesize

    39.1MB

  • memory/3404-2-0x00000000047E0000-0x000000000484D000-memory.dmp

    Filesize

    436KB

  • memory/4312-93-0x00007FFFC8460000-0x00007FFFC863B000-memory.dmp

    Filesize

    1.9MB

  • memory/4312-92-0x0000000072220000-0x000000007239B000-memory.dmp

    Filesize

    1.5MB

  • memory/4312-99-0x0000000072220000-0x000000007239B000-memory.dmp

    Filesize

    1.5MB

  • memory/4688-170-0x0000000001100000-0x00000000011C6000-memory.dmp

    Filesize

    792KB

  • memory/4688-171-0x0000000005660000-0x00000000056F2000-memory.dmp

    Filesize

    584KB

  • memory/4688-172-0x0000000005C00000-0x00000000060FE000-memory.dmp

    Filesize

    5.0MB

  • memory/4688-174-0x0000000005700000-0x0000000005776000-memory.dmp

    Filesize

    472KB

  • memory/4688-173-0x00000000059D0000-0x0000000005B92000-memory.dmp

    Filesize

    1.8MB

  • memory/4688-175-0x0000000005790000-0x00000000057E0000-memory.dmp

    Filesize

    320KB

  • memory/4688-176-0x0000000005600000-0x000000000560A000-memory.dmp

    Filesize

    40KB

  • memory/4688-177-0x0000000006770000-0x0000000006C9C000-memory.dmp

    Filesize

    5.2MB

  • memory/4688-178-0x00000000062E0000-0x00000000062FE000-memory.dmp

    Filesize

    120KB

  • memory/4688-179-0x00000000063C0000-0x0000000006426000-memory.dmp

    Filesize

    408KB

  • memory/4688-167-0x0000000072730000-0x0000000073AB3000-memory.dmp

    Filesize

    19.5MB

  • memory/4688-189-0x0000000007D40000-0x0000000007D4A000-memory.dmp

    Filesize

    40KB