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Analysis

  • max time kernel
    295s
  • max time network
    298s
  • platform
    windows10-1703_x64
  • resource
    win10-20240404-en
  • resource tags

    arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
  • submitted
    25/04/2024, 22:21

General

  • Target

    3d4375cde08e03e77fe51fbca04d0cc4ce29fd7d0a71174473fb2225ba204d43.exe

  • Size

    396KB

  • MD5

    bf4f63cbcc06bf2ae575ea3778e023c1

  • SHA1

    ba9a6a28bfa25886b389afb4dc0e57a1d48eeeb8

  • SHA256

    3d4375cde08e03e77fe51fbca04d0cc4ce29fd7d0a71174473fb2225ba204d43

  • SHA512

    992e3a0680da57fb60060628d56ca974a552a6e266864fad690108c38bbcdf94a6611b008fa2f0568cc0aa7f7a780ab57fb47288209206ecd8ac3158dca2f3b7

  • SSDEEP

    6144:4bUya3+rSZfUNPi77LXMIoTKsmQ3ol2nb14ov0d:sUyaySdnLXvoTmWol4b1j4

Malware Config

Extracted

Family

stealc

C2

http://185.172.128.111

Attributes
  • url_path

    /f993692117a3fda2.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 1 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 5 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\3d4375cde08e03e77fe51fbca04d0cc4ce29fd7d0a71174473fb2225ba204d43.exe
    "C:\Users\Admin\AppData\Local\Temp\3d4375cde08e03e77fe51fbca04d0cc4ce29fd7d0a71174473fb2225ba204d43.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3604
    • C:\Users\Admin\AppData\Local\Temp\u2s4.0.exe
      "C:\Users\Admin\AppData\Local\Temp\u2s4.0.exe"
      2⤵
      • Executes dropped EXE
      PID:1200
    • C:\Users\Admin\AppData\Local\Temp\u2s4.2\run.exe
      "C:\Users\Admin\AppData\Local\Temp\u2s4.2\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:2336
      • 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:3764
        • 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:2308

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\e205573d

    Filesize

    1.4MB

    MD5

    d4ff1ae2c16e6c8518bf2fbaf643976a

    SHA1

    dd691da3887e4c21a477760ddad3c3308c739a73

    SHA256

    b54e32724c0bb1b4992d721f72de5f3a74508a5c8a16bf0df301ea38594bd8f5

    SHA512

    96eaf60b64f45c26abc8d9760994d0b5ad04295fe48c258fbaf4d7bd30eedf0f2dab2b5d4a52a2d5083b92c6507ab56ea75783154ca82c54c61d70a2cdc4c46e

  • C:\Users\Admin\AppData\Local\Temp\tmpEB0E.tmp

    Filesize

    20KB

    MD5

    c9ff7748d8fcef4cf84a5501e996a641

    SHA1

    02867e5010f62f97ebb0cfb32cb3ede9449fe0c9

    SHA256

    4d3f3194cb1133437aa69bb880c8cbb55ddf06ff61a88ca6c3f1bbfbfd35d988

    SHA512

    d36054499869a8f56ac8547ccd5455f1252c24e17d2b185955390b32da7e2a732ace4e0f30f9493fcc61425a2e31ed623465f998f41af69423ee0e3ed1483a73

  • C:\Users\Admin\AppData\Local\Temp\u2s4.0.exe

    Filesize

    275KB

    MD5

    500ff9106af81f784b40acb38342f01e

    SHA1

    fa28d68a241db1ff4a40c5659b65d6cb1b4ae9bc

    SHA256

    55f2a97acc89f9991574ab48d97722932ed4006c589c9128475562cd6c5c2b8d

    SHA512

    a0e1a7d91522fe1c219f4f62568dc5b517b8a36a30c2a8ba19e4deec1ba7602186aeb31b19c00202ea777704c1366e435c131e901bb02e34a0e22ed9979ee6f3

  • C:\Users\Admin\AppData\Local\Temp\u2s4.1.zip

    Filesize

    3.7MB

    MD5

    78d3ca6355c93c72b494bb6a498bf639

    SHA1

    2fa4e5df74bfe75c207c881a1b0d3bc1c62c8b0e

    SHA256

    a1dd547a63b256aa6a16871ed03f8b025226f7617e67b8817a08444df077b001

    SHA512

    1b2df7bee2514aee7efd3579f5dd33c76b40606d07dba69a34c45747662fad61174db4931bca02b058830107959205e889fee74f8ccc9f6e03f9fd111761f4ea

  • C:\Users\Admin\AppData\Local\Temp\u2s4.2\UIxMarketPlugin.dll

    Filesize

    1.6MB

    MD5

    d1ba9412e78bfc98074c5d724a1a87d6

    SHA1

    0572f98d78fb0b366b5a086c2a74cc68b771d368

    SHA256

    cbcea8f28d8916219d1e8b0a8ca2db17e338eb812431bc4ad0cb36c06fd67f15

    SHA512

    8765de36d3824b12c0a4478c31b985878d4811bd0e5b6fba4ea07f8c76340bd66a2da3490d4871b95d9a12f96efc25507dfd87f431de211664dbe9a9c914af6f

  • C:\Users\Admin\AppData\Local\Temp\u2s4.2\bunch.dat

    Filesize

    1.3MB

    MD5

    1e8237d3028ab52821d69099e0954f97

    SHA1

    30a6ae353adda0c471c6ed5b7a2458b07185abf2

    SHA256

    9387488f9d338e211be2cb45109bf590a5070180bc0d4a703f70d3cb3c4e1742

    SHA512

    a6406d7c18694ee014d59df581f1f76e980b68e3361ae680dc979606a423eba48d35e37f143154dd97fe5f066baf0ea51a2e9f8bc822d593e1cba70ead6559f3

  • C:\Users\Admin\AppData\Local\Temp\u2s4.2\run.exe

    Filesize

    2.4MB

    MD5

    9fb4770ced09aae3b437c1c6eb6d7334

    SHA1

    fe54b31b0db8665aa5b22bed147e8295afc88a03

    SHA256

    a05b592a971fe5011554013bcfe9a4aaf9cfc633bdd1fe3a8197f213d557b8d3

    SHA512

    140fee6daf23fe8b7e441b3b4de83554af804f00ecedc421907a385ac79a63164bd9f28b4be061c2ea2262755d85e14d3a8e7dc910547837b664d78d93667256

  • C:\Users\Admin\AppData\Local\Temp\u2s4.2\whale.dbf

    Filesize

    85KB

    MD5

    a723bf46048e0bfb15b8d77d7a648c3e

    SHA1

    8952d3c34e9341e4425571e10f22b782695bb915

    SHA256

    b440170853bdb43b66497f701aee2901080326975140b095a1669cb9dee13422

    SHA512

    ca8ea2f7f3c7af21b5673a0a3f2611b6580a7ed02efa2cfd8b343eb644ff09682bde43b25ef7aab68530d5ce31dcbd252c382dd336ecb610d4c4ebde78347273

  • \Users\Admin\AppData\Local\Temp\u2s4.2\relay.dll

    Filesize

    1.5MB

    MD5

    10d51becd0bbce0fab147ff9658c565e

    SHA1

    4689a18112ff876d3c066bc8c14a08fd6b7b7a4a

    SHA256

    7b2db9c88f60ed6dd24b1dec321a304564780fdb191a96ec35c051856128f1ed

    SHA512

    29faf493bb28f7842c905adc5312f31741effb09f841059b53d73b22aea2c4d41d73db10bbf37703d6aeb936ffacbc756a3cc85ba3c0b6a6863ef4d27fefcd29

  • memory/1200-11-0x0000000000AA0000-0x0000000000AC7000-memory.dmp

    Filesize

    156KB

  • memory/1200-12-0x0000000000400000-0x0000000000846000-memory.dmp

    Filesize

    4.3MB

  • memory/1200-28-0x0000000000400000-0x0000000000846000-memory.dmp

    Filesize

    4.3MB

  • memory/1200-10-0x0000000000B20000-0x0000000000C20000-memory.dmp

    Filesize

    1024KB

  • memory/2308-136-0x0000000007320000-0x000000000732A000-memory.dmp

    Filesize

    40KB

  • memory/2308-123-0x0000000004BD0000-0x0000000004BDA000-memory.dmp

    Filesize

    40KB

  • memory/2308-126-0x0000000005860000-0x00000000058C6000-memory.dmp

    Filesize

    408KB

  • memory/2308-118-0x00000000050C0000-0x00000000055BE000-memory.dmp

    Filesize

    5.0MB

  • memory/2308-125-0x0000000005780000-0x000000000579E000-memory.dmp

    Filesize

    120KB

  • memory/2308-124-0x0000000005C70000-0x000000000619C000-memory.dmp

    Filesize

    5.2MB

  • memory/2308-138-0x0000000004CD0000-0x0000000004CE0000-memory.dmp

    Filesize

    64KB

  • memory/2308-137-0x0000000071680000-0x0000000071D6E000-memory.dmp

    Filesize

    6.9MB

  • memory/2308-122-0x0000000004CE0000-0x0000000004D30000-memory.dmp

    Filesize

    320KB

  • memory/2308-121-0x0000000004C40000-0x0000000004CB6000-memory.dmp

    Filesize

    472KB

  • memory/2308-120-0x0000000004EB0000-0x0000000005072000-memory.dmp

    Filesize

    1.8MB

  • memory/2308-119-0x0000000004CD0000-0x0000000004CE0000-memory.dmp

    Filesize

    64KB

  • memory/2308-111-0x0000000072530000-0x00000000738B3000-memory.dmp

    Filesize

    19.5MB

  • memory/2308-116-0x0000000071680000-0x0000000071D6E000-memory.dmp

    Filesize

    6.9MB

  • memory/2308-115-0x0000000000600000-0x00000000006C6000-memory.dmp

    Filesize

    792KB

  • memory/2308-117-0x0000000004AF0000-0x0000000004B82000-memory.dmp

    Filesize

    584KB

  • memory/2336-102-0x0000000071F30000-0x00000000720AB000-memory.dmp

    Filesize

    1.5MB

  • memory/2336-101-0x0000000071F30000-0x00000000720AB000-memory.dmp

    Filesize

    1.5MB

  • memory/2336-95-0x00007FFB84650000-0x00007FFB8482B000-memory.dmp

    Filesize

    1.9MB

  • memory/2336-94-0x0000000071F30000-0x00000000720AB000-memory.dmp

    Filesize

    1.5MB

  • memory/3604-1-0x0000000002C90000-0x0000000002D90000-memory.dmp

    Filesize

    1024KB

  • memory/3604-88-0x0000000000400000-0x0000000002C46000-memory.dmp

    Filesize

    40.3MB

  • memory/3604-3-0x0000000000400000-0x0000000002C46000-memory.dmp

    Filesize

    40.3MB

  • memory/3604-2-0x0000000003010000-0x000000000307D000-memory.dmp

    Filesize

    436KB

  • memory/3764-112-0x0000000071F30000-0x00000000720AB000-memory.dmp

    Filesize

    1.5MB

  • memory/3764-109-0x0000000071F30000-0x00000000720AB000-memory.dmp

    Filesize

    1.5MB

  • memory/3764-108-0x0000000071F30000-0x00000000720AB000-memory.dmp

    Filesize

    1.5MB

  • memory/3764-106-0x00007FFB84650000-0x00007FFB8482B000-memory.dmp

    Filesize

    1.9MB

  • memory/3764-104-0x0000000071F30000-0x00000000720AB000-memory.dmp

    Filesize

    1.5MB