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Analysis

  • max time kernel
    150s
  • max time network
    123s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    12/03/2024, 10:24

General

  • Target

    899859da24d37f27235b52d83379a30f525ac738d66b44e7d37943e0f6595396.exe

  • Size

    2.0MB

  • MD5

    cf77e816a9eed276d7b0537084f1c8df

  • SHA1

    b1d75e826497a6c7f253e86798e3f85e4a7bbe08

  • SHA256

    899859da24d37f27235b52d83379a30f525ac738d66b44e7d37943e0f6595396

  • SHA512

    8f138c17bc5cd0ab41a5db11de271fc61fc8646fcce54f2103e25ccdd2f27873dab90ba70ce87a77f088e208ee14765cec98b2e6d90dca13630ba46b304ad9c6

  • SSDEEP

    49152:LPImNQB7he9zS2dvMZ8cZLVS6W/iZab3sZlZm8mS:0Qoc9O6kZJxS6OZ8X

Malware Config

Extracted

Family

stealc

C2

http://185.172.128.145

Attributes
  • url_path

    /3cd2b41cbde8fc9c.php

Signatures

  • Stealc

    Stealc is an infostealer written in C++.

  • Downloads MZ/PE file
  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 8 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.

  • UPX packed file 5 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • 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.

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 43 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\899859da24d37f27235b52d83379a30f525ac738d66b44e7d37943e0f6595396.exe
    "C:\Users\Admin\AppData\Local\Temp\899859da24d37f27235b52d83379a30f525ac738d66b44e7d37943e0f6595396.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:2804
    • C:\Users\Admin\AppData\Local\Temp\syncUpd.exe
      C:\Users\Admin\AppData\Local\Temp\syncUpd.exe
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2216
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\HDGHJEBFBF.exe"
        3⤵
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:1616
        • C:\Users\Admin\AppData\Local\Temp\HDGHJEBFBF.exe
          "C:\Users\Admin\AppData\Local\Temp\HDGHJEBFBF.exe"
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1928
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\System32\cmd.exe" /C ping 2.2.2.2 -n 1 -w 3000 > Nul & Del C:\Users\Admin\AppData\Local\Temp\HDGHJEBFBF.exe
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:2156
            • C:\Windows\SysWOW64\PING.EXE
              ping 2.2.2.2 -n 1 -w 3000
              6⤵
              • Runs ping.exe
              PID:2636
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\GCGIDGCGIE.exe"
        3⤵
          PID:2008
      • C:\Users\Admin\AppData\Local\Temp\BroomSetup.exe
        C:\Users\Admin\AppData\Local\Temp\BroomSetup.exe
        2⤵
        • Executes dropped EXE
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2540
        • C:\Windows\SysWOW64\cmd.exe
          cmd /c ""C:\Users\Admin\AppData\Roaming\Temp\Task.bat" "
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:1848
          • C:\Windows\SysWOW64\chcp.com
            chcp 1251
            4⤵
              PID:1008
            • C:\Windows\SysWOW64\schtasks.exe
              schtasks /create /tn "MalayamaraUpdate" /tr "'C:\Users\Admin\AppData\Local\Temp\Updater.exe'" /sc minute /mo 30 /F
              4⤵
              • Creates scheduled task(s)
              PID:1320

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\BroomSetup.exe

        Filesize

        519KB

        MD5

        36fc0e54e32a1d6a019bf41fe600fc86

        SHA1

        1e4e9c5139d6917f69ea79d014cfd2501b0c8bb4

        SHA256

        acae35254660e08dd194aaf5b1f93dbdaec0cde1ac1f54aa1f86c98405aa3e9a

        SHA512

        3a504de426e779aabf23a26978222958cdad953c4dd17498b74b3b13f02c44ffa9c281d059d9ba5c5f67ebefea7db5e5f6d78aa446f51329e7a3b709218d2885

      • C:\Users\Admin\AppData\Local\Temp\HDGHJEBFBF.exe

        Filesize

        101KB

        MD5

        42b838cf8bdf67400525e128d917f6e0

        SHA1

        a578f6faec738912dba8c41e7abe1502c46d0cae

        SHA256

        0e4ffba62ce9a464aa1b7ff9f1e55ace8f51ff1e15102d856f801a81f8b4607d

        SHA512

        f64b39d885375251ab7db72c57dc5b5095f0c6412169f1035d1f6a25b8415a2a01004d06bfa0267cf683ef7dea7a9f969ad43fde5a4376f1fcb65a57403433c0

      • C:\Users\Admin\AppData\Roaming\Temp\Task.bat

        Filesize

        128B

        MD5

        11bb3db51f701d4e42d3287f71a6a43e

        SHA1

        63a4ee82223be6a62d04bdfe40ef8ba91ae49a86

        SHA256

        6be22058abfb22b40a42fb003f86b89e204a83024c03eb82cd53e2a0a047c331

        SHA512

        907ad2c070cc1db89f43459a94d7f48985d939d749c9648b78572a266f0d3fde47813a129e9151dbf4a7d96d36f588172f57c88b8b947b56ed818d7d068abab2

      • \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

      • \Users\Admin\AppData\Local\Temp\BroomSetup.exe

        Filesize

        1.0MB

        MD5

        b99cf10e538f33528b06ef2b27222535

        SHA1

        d168e64bb79707db06c643932807f07ca4bb4be5

        SHA256

        74490a33297e877f6ed02536eb3b2ebaab6032f03ea89bcdd74f0dbf9fbc55d8

        SHA512

        7bea15377d46badb849697ca9cad0bc2c80287282028c3207913d177d4eb2de8fa2b36257db099a0cf0909e98875a9a9a4584e93b712eff7b71e4ecb97d8a9db

      • \Users\Admin\AppData\Local\Temp\nsj73DB.tmp\INetC.dll

        Filesize

        21KB

        MD5

        2b342079303895c50af8040a91f30f71

        SHA1

        b11335e1cb8356d9c337cb89fe81d669a69de17e

        SHA256

        2d5d89025911e2e273f90f393624be4819641dbee1606de792362e442e54612f

        SHA512

        550452dadc86ecd205f40668894116790a456fe46e9985d68093d36cf32abf00edecb5c56ff0287464a0e819db7b3cc53926037a116de6c651332a7cc8035d47

      • \Users\Admin\AppData\Local\Temp\syncUpd.exe

        Filesize

        199KB

        MD5

        220cb1b1688c2364b9ab272e37b896f3

        SHA1

        3cb7b248bb15c6e51b0f58ec71c1f12c443c37b9

        SHA256

        24db4554df7ef6ba312c16c14f72d20471da31e494f688ab01462c5a02124fe7

        SHA512

        f2b18a3f0adaa70f871afa689c32591744e867dd1fae3b24344b842202ab9dc73723309391b7b98b72b45a55ef506b981db38d7a753b9d6712a198700a427e37

      • memory/1928-161-0x0000000071D40000-0x000000007242E000-memory.dmp

        Filesize

        6.9MB

      • memory/1928-149-0x0000000071D40000-0x000000007242E000-memory.dmp

        Filesize

        6.9MB

      • memory/1928-163-0x0000000004A60000-0x0000000004AA0000-memory.dmp

        Filesize

        256KB

      • memory/1928-143-0x0000000000FE0000-0x0000000000FFE000-memory.dmp

        Filesize

        120KB

      • memory/1928-156-0x0000000004A60000-0x0000000004AA0000-memory.dmp

        Filesize

        256KB

      • memory/2008-151-0x00000000021C0000-0x00000000021C1000-memory.dmp

        Filesize

        4KB

      • memory/2216-33-0x00000000007C0000-0x00000000008C0000-memory.dmp

        Filesize

        1024KB

      • memory/2216-79-0x0000000000400000-0x000000000063B000-memory.dmp

        Filesize

        2.2MB

      • memory/2216-34-0x0000000000270000-0x0000000000297000-memory.dmp

        Filesize

        156KB

      • memory/2216-108-0x0000000000400000-0x000000000063B000-memory.dmp

        Filesize

        2.2MB

      • memory/2216-109-0x00000000007C0000-0x00000000008C0000-memory.dmp

        Filesize

        1024KB

      • memory/2216-110-0x0000000000270000-0x0000000000297000-memory.dmp

        Filesize

        156KB

      • memory/2216-36-0x0000000061E00000-0x0000000061EF3000-memory.dmp

        Filesize

        972KB

      • memory/2216-35-0x0000000000400000-0x000000000063B000-memory.dmp

        Filesize

        2.2MB

      • memory/2540-89-0x0000000000400000-0x0000000000930000-memory.dmp

        Filesize

        5.2MB

      • memory/2540-31-0x0000000000240000-0x0000000000241000-memory.dmp

        Filesize

        4KB

      • memory/2540-30-0x0000000000400000-0x0000000000930000-memory.dmp

        Filesize

        5.2MB

      • memory/2540-158-0x0000000000240000-0x0000000000241000-memory.dmp

        Filesize

        4KB

      • memory/2540-159-0x0000000000400000-0x0000000000930000-memory.dmp

        Filesize

        5.2MB

      • memory/2804-132-0x0000000004CE0000-0x0000000005210000-memory.dmp

        Filesize

        5.2MB

      • memory/2804-29-0x0000000004CE0000-0x0000000005210000-memory.dmp

        Filesize

        5.2MB

      • memory/2804-27-0x0000000000400000-0x000000000043D000-memory.dmp

        Filesize

        244KB