Analysis

  • max time kernel
    150s
  • max time network
    125s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    12-03-2024 22:42

General

  • Target

    e4c88ef88cd0bae896c2e49f692d29e992f6fd261c8f7aaf96fadde55de6cdaa.exe

  • Size

    2.0MB

  • MD5

    82d5fd8413dea6b318ac98e597b2f9f6

  • SHA1

    de8a5b67bba558d434e7edb463f9b6ee42e56394

  • SHA256

    e4c88ef88cd0bae896c2e49f692d29e992f6fd261c8f7aaf96fadde55de6cdaa

  • SHA512

    ca852b01bc26dffaf94b7ee3532784dc33cb29ef67affdb4cb58b3b6b64c36dacfd8e1f046fe1430386e5b7046310102826033b78c1a20f736b0787091866b0d

  • SSDEEP

    49152:LCZ9FbqoVBbFeSNU1ux1XRJcuO+U9QGu5E4M90eSZqBraOZkS:2Z9AoVLm3paGhd9uWraOZz

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 6 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\e4c88ef88cd0bae896c2e49f692d29e992f6fd261c8f7aaf96fadde55de6cdaa.exe
    "C:\Users\Admin\AppData\Local\Temp\e4c88ef88cd0bae896c2e49f692d29e992f6fd261c8f7aaf96fadde55de6cdaa.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1556
    • 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:2152
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\EGCFIDAFBF.exe"
        3⤵
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:1784
        • C:\Users\Admin\AppData\Local\Temp\EGCFIDAFBF.exe
          "C:\Users\Admin\AppData\Local\Temp\EGCFIDAFBF.exe"
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:548
          • 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\EGCFIDAFBF.exe
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:1896
            • C:\Windows\SysWOW64\PING.EXE
              ping 2.2.2.2 -n 1 -w 3000
              6⤵
              • Runs ping.exe
              PID:1304
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\AAFIIJDAAA.exe"
        3⤵
          PID:2440
      • 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:2492
        • C:\Windows\SysWOW64\cmd.exe
          cmd /c ""C:\Users\Admin\AppData\Roaming\Temp\Task.bat" "
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:604
          • C:\Windows\SysWOW64\chcp.com
            chcp 1251
            4⤵
              PID:2148
            • 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:1736

      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

        248KB

        MD5

        7890c442f2bc61f969ec0c52a48b9410

        SHA1

        a62c2ad350ef0573e2f336906f0675ce91fbd20c

        SHA256

        2e35afd3cc8016157061624bff4aebd7ed16ec3b89877433ed660e2dc7e3b9d1

        SHA512

        17645e15d73ec17955134977a6909562640fb7e0d6197528ed7804372a1761f65d5d01163a86579477e470667257566762af51587390331a1ffbec09159157c8

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

        293KB

        MD5

        7cce8ab1361b5b7ece51c04d82c69617

        SHA1

        0033f361e8d6da2134de34ea3921f4daa844e417

        SHA256

        efc871d0543c1fa1e36afc8daf60e75418b8b1a7dc03fbdf1b8059167b0f1a6a

        SHA512

        74d9e152396700b48346e0472cad13151cb1634fab4e48b99aa114fcef15cbca2d0a5f8181703f812477bf609c2d796b100713a6c117f11681d20bceeb1367cc

      • \Users\Admin\AppData\Local\Temp\nstAB3F.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/548-164-0x0000000071BB0000-0x000000007229E000-memory.dmp
        Filesize

        6.9MB

      • memory/548-150-0x0000000001080000-0x000000000109E000-memory.dmp
        Filesize

        120KB

      • memory/548-152-0x0000000071BB0000-0x000000007229E000-memory.dmp
        Filesize

        6.9MB

      • memory/548-157-0x00000000008F0000-0x0000000000930000-memory.dmp
        Filesize

        256KB

      • memory/548-166-0x00000000008F0000-0x0000000000930000-memory.dmp
        Filesize

        256KB

      • memory/1556-32-0x0000000000400000-0x000000000043D000-memory.dmp
        Filesize

        244KB

      • memory/1556-33-0x0000000004D30000-0x0000000005260000-memory.dmp
        Filesize

        5.2MB

      • memory/2152-65-0x0000000000400000-0x000000000063B000-memory.dmp
        Filesize

        2.2MB

      • memory/2152-36-0x0000000061E00000-0x0000000061EF3000-memory.dmp
        Filesize

        972KB

      • memory/2152-116-0x0000000000760000-0x0000000000860000-memory.dmp
        Filesize

        1024KB

      • memory/2152-16-0x0000000000760000-0x0000000000860000-memory.dmp
        Filesize

        1024KB

      • memory/2152-17-0x0000000000230000-0x0000000000257000-memory.dmp
        Filesize

        156KB

      • memory/2152-110-0x0000000000400000-0x000000000063B000-memory.dmp
        Filesize

        2.2MB

      • memory/2152-19-0x0000000000400000-0x000000000063B000-memory.dmp
        Filesize

        2.2MB

      • memory/2152-85-0x0000000000400000-0x000000000063B000-memory.dmp
        Filesize

        2.2MB

      • memory/2152-86-0x0000000000230000-0x0000000000257000-memory.dmp
        Filesize

        156KB

      • memory/2152-84-0x0000000000760000-0x0000000000860000-memory.dmp
        Filesize

        1024KB

      • memory/2152-114-0x0000000000400000-0x000000000063B000-memory.dmp
        Filesize

        2.2MB

      • memory/2440-153-0x0000000002200000-0x0000000002201000-memory.dmp
        Filesize

        4KB

      • memory/2492-34-0x0000000000400000-0x0000000000930000-memory.dmp
        Filesize

        5.2MB

      • memory/2492-111-0x0000000000250000-0x0000000000251000-memory.dmp
        Filesize

        4KB

      • memory/2492-162-0x0000000000400000-0x0000000000930000-memory.dmp
        Filesize

        5.2MB

      • memory/2492-35-0x0000000000250000-0x0000000000251000-memory.dmp
        Filesize

        4KB

      • memory/2492-83-0x0000000000400000-0x0000000000930000-memory.dmp
        Filesize

        5.2MB