Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/04/2024, 01:13

General

  • Target
    437a0c3b59348d0e1c8af3daaaf4f13c64adb5d82f6be0e9b447ea6d27b07c6e.exe
  • Size 457KB
  • Sample240429-bk51dadg86
  • SHA256 437a0c3b59348d0e1c8af3daaaf4f13c64adb5d82f6be0e9b447ea6d27b07c6e
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • stealc

C2
  • http://185.172.128.151

Attributes
  • url_path

    /7043a0c6a68d9c65.php

Signatures

  • SectopRAT

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

  • SectopRAT payload 1 IoCs
  • Stealc

    Stealc is an infostealer written in C++.

  • Detect binaries embedding considerable number of MFA browser extension IDs. 2 IoCs
  • Detect binaries embedding considerable number of cryptocurrency wallet browser extension IDs. 2 IoCs
  • Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 2 IoCs
  • 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 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).

  • Program crash 2 IoCs
  • 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 7 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\437a0c3b59348d0e1c8af3daaaf4f13c64adb5d82f6be0e9b447ea6d27b07c6e.exe
    "C:\Users\Admin\AppData\Local\Temp\437a0c3b59348d0e1c8af3daaaf4f13c64adb5d82f6be0e9b447ea6d27b07c6e.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1976
    • C:\Users\Admin\AppData\Local\Temp\u1iw.0.exe
      "C:\Users\Admin\AppData\Local\Temp\u1iw.0.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Loads dropped DLL
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4276
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\u1iw.0.exe" & del "C:\ProgramData\*.dll"" & exit
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2276
        • C:\Windows\SysWOW64\timeout.exe
          timeout /t 5
          4⤵
          • Delays execution with timeout.exe
          PID:3732
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 4276 -s 2164
        3⤵
        • Program crash
        PID:4608
    • C:\Users\Admin\AppData\Local\Temp\u1iw.2\run.exe
      "C:\Users\Admin\AppData\Local\Temp\u1iw.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:4084
      • 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:4420
        • 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:1528
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1976 -s 1156
      2⤵
      • Program crash
      PID:4004
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 1976 -ip 1976
    1⤵
      PID:1904
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 4276 -ip 4276
      1⤵
        PID:4800

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            Are.docx

            • Path C:\ProgramData\Are.docx
            • Size 11KB
            • SHA256 5abf8e3d1f78de7b09d7f6fb87f9e80e60caacf13ef3c1289665653dacd7c454
            • MD5 SHA1 SHA512 SSDEEP

            mozglue.dll

            • Path C:\ProgramData\mozglue.dll
            • Size 593KB
            • SHA256 ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a
            • MD5 SHA1 SHA512 SSDEEP

            nss3.dll

            • Path C:\ProgramData\nss3.dll
            • Size 2.0MB
            • SHA256 ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5
            • MD5 SHA1 SHA512 SSDEEP

            a3f86694

            • Path C:\Users\Admin\AppData\Local\Temp\a3f86694
            • Size 1.4MB
            • SHA256 d6c54dec664916eb209a4bd49700badcf1bc6eabb97bc31ff8e6c611ddd3cbc4
            • MD5 SHA1 SHA512 SSDEEP

            tmpDD41.tmp

            • Path C:\Users\Admin\AppData\Local\Temp\tmpDD41.tmp
            • Size 20KB
            • SHA256 5644546ecefc6786c7be5b1a89e935e640963ccd34b130f21baab9370cb9055d
            • MD5 SHA1 SHA512 SSDEEP

            tmpDD64.tmp

            • Path C:\Users\Admin\AppData\Local\Temp\tmpDD64.tmp
            • Size 20KB
            • SHA256 d76e7512e496b7c8d9fcd3010a55e2e566881dc6dacaf0343652a4915d47829f
            • MD5 SHA1 SHA512 SSDEEP

            u1iw.0.exe

            • Path C:\Users\Admin\AppData\Local\Temp\u1iw.0.exe
            • Size 303KB
            • SHA256 c31a405cf896488cfc1b7451e64c9333439a5578cc2a7d2070db7b0009785c6f
            • MD5 SHA1 SHA512 SSDEEP

            u1iw.1.zip

            • Path C:\Users\Admin\AppData\Local\Temp\u1iw.1.zip
            • Size 3.7MB
            • SHA256 a1dd547a63b256aa6a16871ed03f8b025226f7617e67b8817a08444df077b001
            • MD5 SHA1 SHA512 SSDEEP

            UIxMarketPlugin.dll

            • Path C:\Users\Admin\AppData\Local\Temp\u1iw.2\UIxMarketPlugin.dll
            • Size 1.6MB
            • SHA256 cbcea8f28d8916219d1e8b0a8ca2db17e338eb812431bc4ad0cb36c06fd67f15
            • MD5 SHA1 SHA512 SSDEEP

            bunch.dat

            • Path C:\Users\Admin\AppData\Local\Temp\u1iw.2\bunch.dat
            • Size 1.3MB
            • SHA256 9387488f9d338e211be2cb45109bf590a5070180bc0d4a703f70d3cb3c4e1742
            • MD5 SHA1 SHA512 SSDEEP

            relay.dll

            • Path C:\Users\Admin\AppData\Local\Temp\u1iw.2\relay.dll
            • Size 1.5MB
            • SHA256 7b2db9c88f60ed6dd24b1dec321a304564780fdb191a96ec35c051856128f1ed
            • MD5 SHA1 SHA512 SSDEEP

            run.exe

            • Path C:\Users\Admin\AppData\Local\Temp\u1iw.2\run.exe
            • Size 2.4MB
            • SHA256 a05b592a971fe5011554013bcfe9a4aaf9cfc633bdd1fe3a8197f213d557b8d3
            • MD5 SHA1 SHA512 SSDEEP

            whale.dbf

            • Path C:\Users\Admin\AppData\Local\Temp\u1iw.2\whale.dbf
            • Size 85KB
            • SHA256 b440170853bdb43b66497f701aee2901080326975140b095a1669cb9dee13422
            • MD5 SHA1 SHA512 SSDEEP

            memory/1528-212-0x0000000005400000-0x00000000055C2000-memory.dmp

            memory/1528-214-0x0000000005320000-0x0000000005370000-memory.dmp

            memory/1528-237-0x0000000007A20000-0x0000000007A2A000-memory.dmp

            memory/1528-210-0x0000000005180000-0x0000000005212000-memory.dmp

            memory/1528-209-0x0000000000B00000-0x0000000000BC6000-memory.dmp

            memory/1528-206-0x0000000073400000-0x0000000074654000-memory.dmp

            memory/1528-211-0x00000000057D0000-0x0000000005D74000-memory.dmp

            memory/1528-215-0x0000000005220000-0x000000000522A000-memory.dmp

            memory/1528-216-0x00000000063B0000-0x00000000068DC000-memory.dmp

            memory/1528-217-0x0000000005F10000-0x0000000005F2E000-memory.dmp

            memory/1528-218-0x0000000006000000-0x0000000006066000-memory.dmp

            memory/1528-213-0x00000000052A0000-0x0000000005316000-memory.dmp

            memory/1976-2-0x0000000003680000-0x00000000036ED000-memory.dmp

            memory/1976-3-0x0000000000400000-0x0000000001A3D000-memory.dmp

            memory/1976-1-0x0000000001BE0000-0x0000000001CE0000-memory.dmp

            memory/1976-160-0x0000000000400000-0x0000000001A3D000-memory.dmp

            memory/4084-184-0x0000000072E90000-0x000000007300B000-memory.dmp

            memory/4084-149-0x0000000072E90000-0x000000007300B000-memory.dmp

            memory/4084-150-0x00007FFB78E90000-0x00007FFB79085000-memory.dmp

            memory/4276-203-0x0000000000400000-0x0000000001A17000-memory.dmp

            memory/4276-17-0x0000000001CA0000-0x0000000001CC7000-memory.dmp

            memory/4276-187-0x0000000000400000-0x0000000001A17000-memory.dmp

            memory/4276-16-0x0000000001CD0000-0x0000000001DD0000-memory.dmp

            memory/4276-18-0x0000000000400000-0x0000000001A17000-memory.dmp

            memory/4276-19-0x0000000061E00000-0x0000000061EF3000-memory.dmp

            memory/4420-204-0x0000000072E90000-0x000000007300B000-memory.dmp

            memory/4420-188-0x00007FFB78E90000-0x00007FFB79085000-memory.dmp