Analysis

  • max time kernel
    159s
  • max time network
    138s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    13-03-2024 00:44

General

  • Target

    bdc7ffeef3b5a1883c2436061a2c1500bebe3351c53fdd08363b0a8a6688c875.exe

  • Size

    2.0MB

  • MD5

    349ba3d1c0e6137a949e7e987613f847

  • SHA1

    bd497597228a48d1974a154ec9643d1e8bce02e2

  • SHA256

    bdc7ffeef3b5a1883c2436061a2c1500bebe3351c53fdd08363b0a8a6688c875

  • SHA512

    668a3333b3b7455c2eee799ae6b3b76c3dcd6887a5d6f33d6318b7c076e980dd4f0e2bad61467ebf29120c1284bd483b3a6772140cd4390016e6450793fa6417

  • SSDEEP

    49152:LCfuk7QR6Bi93ljOw3ipad4NF27EVYsXpbsE2ywndWWc2j4tkjW33:GER6kPjOgipaU2QVhXpbLmzc2jXS

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 7 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\bdc7ffeef3b5a1883c2436061a2c1500bebe3351c53fdd08363b0a8a6688c875.exe
    "C:\Users\Admin\AppData\Local\Temp\bdc7ffeef3b5a1883c2436061a2c1500bebe3351c53fdd08363b0a8a6688c875.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:2532
    • 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:2900
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\DHCGIDHDAK.exe"
        3⤵
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:2896
        • C:\Users\Admin\AppData\Local\Temp\DHCGIDHDAK.exe
          "C:\Users\Admin\AppData\Local\Temp\DHCGIDHDAK.exe"
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2148
          • 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\DHCGIDHDAK.exe
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:1276
            • C:\Windows\SysWOW64\PING.EXE
              ping 2.2.2.2 -n 1 -w 3000
              6⤵
              • Runs ping.exe
              PID:1072
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\FCAKFCGCGI.exe"
        3⤵
          PID:2988
      • 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:2588
        • C:\Windows\SysWOW64\cmd.exe
          cmd /c ""C:\Users\Admin\AppData\Roaming\Temp\Task.bat" "
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:1940
          • C:\Windows\SysWOW64\chcp.com
            chcp 1251
            4⤵
              PID:1928
            • 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:1956

      Network

      MITRE ATT&CK Matrix ATT&CK v13

      Execution

      Scheduled Task/Job

      1
      T1053

      Persistence

      Boot or Logon Autostart Execution

      1
      T1547

      Registry Run Keys / Startup Folder

      1
      T1547.001

      Scheduled Task/Job

      1
      T1053

      Privilege Escalation

      Boot or Logon Autostart Execution

      1
      T1547

      Registry Run Keys / Startup Folder

      1
      T1547.001

      Scheduled Task/Job

      1
      T1053

      Defense Evasion

      Modify Registry

      1
      T1112

      Credential Access

      Unsecured Credentials

      3
      T1552

      Credentials In Files

      3
      T1552.001

      Discovery

      Query Registry

      2
      T1012

      System Information Discovery

      2
      T1082

      Remote System Discovery

      1
      T1018

      Collection

      Data from Local System

      3
      T1005

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        1.7MB

        MD5

        eee5ddcffbed16222cac0a1b4e2e466e

        SHA1

        28b40c88b8ea50b0782e2bcbb4cc0f411035f3d5

        SHA256

        2a40e5dccc7526c4982334941c90f95374460e2a816e84e724e98c4d52ae8c54

        SHA512

        8f88901f3ebd425818db09f268df19ccf8a755603f04e9481bcf02b112a84393f8a900ead77f8f971bfa33fd9fa5636b7494aaee864a0fb04e3273911a4216dc

      • C:\Users\Admin\AppData\Local\Temp\DHCGIDHDAK.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

        1.1MB

        MD5

        8a78157e59dbe3153bc4a49b22c75013

        SHA1

        0ac3ea2a8001648f7e07bf499ae3e3885da6c0ae

        SHA256

        a8f68e83eece64f3f0bd55e6e2a967fca72e66648d2c6a59dbbb76ed08f7e7db

        SHA512

        a64ed84fd1430ca7b8639f2d83a8ce724ecbf3b047ba5d4562a8fa9e0be0756942882def4f4a4109c2a30c81f91c91511eb739361222a7257636169a635b616a

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

        453KB

        MD5

        b0d3347cd300954b3a199bf50f1864c5

        SHA1

        faf18eaca622f43d199ab396fffa384936cce61a

        SHA256

        a713bc735036af8236fd2fed16f44eaa774f0b5714f94506387d05cd6a969f4f

        SHA512

        019e082652cb96d055251384fc2dce0bfd89712bcfa0029086e3be798c5d295c897b7730318f1ce099335a73b657c719084d9e355eee9f282dd3972e2307b734

      • \Users\Admin\AppData\Local\Temp\nst9945.tmp\INetC.dll
        Filesize

        21KB

        MD5

        2b342079303895c50af8040a91f30f71

        SHA1

        b11335e1cb8356d9c337cb89fe81d669a69de17e

        SHA256

        2d5d89025911e2e273f90f393624be4819641dbee1606de792362e442e54612f

        SHA512

        550452dadc86ecd205f40668894116790a456fe46e9985d68093d36cf32abf00edecb5c56ff0287464a0e819db7b3cc53926037a116de6c651332a7cc8035d47

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

        200KB

        MD5

        c722591f624fb69970f246b8c81d830f

        SHA1

        85516decea5d6987bebe39cbadf36053beaf4bb0

        SHA256

        13cd1152a19fdac6581cac2bd822f34bd3026ea1783ff231e299b6d28c046a6a

        SHA512

        822584c5c8a0813af4d845e80919776c71a43464ab719d1c303ebaae6a8ed47763183566bedc9be2e8c44de8ee6fd62d1e12be471e5d5c73ae4b1dcdaa34a908

      • memory/2148-134-0x0000000001360000-0x000000000137E000-memory.dmp
        Filesize

        120KB

      • memory/2148-140-0x0000000071F50000-0x000000007263E000-memory.dmp
        Filesize

        6.9MB

      • memory/2148-161-0x0000000004C90000-0x0000000004CD0000-memory.dmp
        Filesize

        256KB

      • memory/2148-168-0x0000000071F50000-0x000000007263E000-memory.dmp
        Filesize

        6.9MB

      • memory/2148-170-0x0000000004C90000-0x0000000004CD0000-memory.dmp
        Filesize

        256KB

      • memory/2532-61-0x0000000000400000-0x000000000043D000-memory.dmp
        Filesize

        244KB

      • memory/2532-63-0x0000000005010000-0x0000000005540000-memory.dmp
        Filesize

        5.2MB

      • memory/2588-67-0x0000000000400000-0x0000000000930000-memory.dmp
        Filesize

        5.2MB

      • memory/2588-69-0x0000000000240000-0x0000000000241000-memory.dmp
        Filesize

        4KB

      • memory/2588-87-0x0000000000400000-0x0000000000930000-memory.dmp
        Filesize

        5.2MB

      • memory/2588-117-0x0000000000240000-0x0000000000241000-memory.dmp
        Filesize

        4KB

      • memory/2588-167-0x0000000000400000-0x0000000000930000-memory.dmp
        Filesize

        5.2MB

      • memory/2588-108-0x0000000000400000-0x0000000000930000-memory.dmp
        Filesize

        5.2MB

      • memory/2900-92-0x0000000000770000-0x0000000000870000-memory.dmp
        Filesize

        1024KB

      • memory/2900-122-0x0000000000770000-0x0000000000870000-memory.dmp
        Filesize

        1024KB

      • memory/2900-114-0x0000000000400000-0x000000000063B000-memory.dmp
        Filesize

        2.2MB

      • memory/2900-118-0x0000000000400000-0x000000000063B000-memory.dmp
        Filesize

        2.2MB

      • memory/2900-88-0x0000000000400000-0x000000000063B000-memory.dmp
        Filesize

        2.2MB

      • memory/2900-68-0x0000000000400000-0x000000000063B000-memory.dmp
        Filesize

        2.2MB

      • memory/2900-19-0x0000000061E00000-0x0000000061EF3000-memory.dmp
        Filesize

        972KB

      • memory/2900-18-0x0000000000400000-0x000000000063B000-memory.dmp
        Filesize

        2.2MB

      • memory/2900-17-0x0000000000220000-0x0000000000247000-memory.dmp
        Filesize

        156KB

      • memory/2900-16-0x0000000000770000-0x0000000000870000-memory.dmp
        Filesize

        1024KB

      • memory/2988-156-0x0000000002240000-0x0000000002241000-memory.dmp
        Filesize

        4KB