Analysis

  • max time kernel
    150s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    15/03/2024, 14:34

General

  • Target

    aaba138e7e153d2f77eead98fa84ad73f499081057cefa0d77c5bb705c4c818d.exe

  • Size

    366KB

  • MD5

    ee104db3a5b8af44395b171c84b61b4e

  • SHA1

    0ed9f8feabb162c4caced149cc60390b883210a9

  • SHA256

    aaba138e7e153d2f77eead98fa84ad73f499081057cefa0d77c5bb705c4c818d

  • SHA512

    04d221faf98e3b4817c2012677b61e8668e0c8f7aa4625398ff751b94beb326a80586476c3933a8321807f4c63a2bd7388593ca7fdfe3c2789a92c8dc69f28f4

  • SSDEEP

    6144:cvPB0woB2e3eC1nZ5h6c97hKXKzUVM3TfiuT:mPT7CljhpYKHzT

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 12 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 40 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\aaba138e7e153d2f77eead98fa84ad73f499081057cefa0d77c5bb705c4c818d.exe
    "C:\Users\Admin\AppData\Local\Temp\aaba138e7e153d2f77eead98fa84ad73f499081057cefa0d77c5bb705c4c818d.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1740
    • C:\Users\Admin\AppData\Local\Temp\u1cc.0.exe
      "C:\Users\Admin\AppData\Local\Temp\u1cc.0.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1584
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\IEHJJECBKK.exe"
        3⤵
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:352
        • C:\Users\Admin\AppData\Local\Temp\IEHJJECBKK.exe
          "C:\Users\Admin\AppData\Local\Temp\IEHJJECBKK.exe"
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2288
          • 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\IEHJJECBKK.exe
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:1960
            • C:\Windows\SysWOW64\PING.EXE
              ping 2.2.2.2 -n 1 -w 3000
              6⤵
              • Runs ping.exe
              PID:784
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\KFBGCAKFHC.exe"
        3⤵
          PID:1084
      • C:\Users\Admin\AppData\Local\Temp\u1cc.1.exe
        "C:\Users\Admin\AppData\Local\Temp\u1cc.1.exe"
        2⤵
        • Executes dropped EXE
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2840
        • C:\Windows\SysWOW64\cmd.exe
          cmd /c ""C:\Users\Admin\AppData\Roaming\Temp\Task.bat" "
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:2444
          • C:\Windows\SysWOW64\chcp.com
            chcp 1251
            4⤵
              PID:632
            • 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:1828

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\IEHJJECBKK.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\u1cc.0.exe

        Filesize

        252KB

        MD5

        ffcf4340a3f7e5b97f28a894b0330487

        SHA1

        b7a98752e3853d4fa85d94490d34496fdcf18dbd

        SHA256

        d6c0979656434a63303a43a9003a30840e1dcd23ff502a255bbbe8609fa6248d

        SHA512

        e3e6855c78fe7aa5f07e7fcb2994a13aa556a57d1eea45535cb9610a32895d236cc379d24618de0b210487a3c2b8f13be8975b8faccf7ff3f9689466f8f73e08

      • \Users\Admin\AppData\Local\Temp\u1cc.1.exe

        Filesize

        1.7MB

        MD5

        eee5ddcffbed16222cac0a1b4e2e466e

        SHA1

        28b40c88b8ea50b0782e2bcbb4cc0f411035f3d5

        SHA256

        2a40e5dccc7526c4982334941c90f95374460e2a816e84e724e98c4d52ae8c54

        SHA512

        8f88901f3ebd425818db09f268df19ccf8a755603f04e9481bcf02b112a84393f8a900ead77f8f971bfa33fd9fa5636b7494aaee864a0fb04e3273911a4216dc

      • memory/1084-176-0x0000000002500000-0x0000000002501000-memory.dmp

        Filesize

        4KB

      • memory/1584-134-0x0000000000400000-0x000000000063B000-memory.dmp

        Filesize

        2.2MB

      • memory/1584-97-0x0000000000400000-0x000000000063B000-memory.dmp

        Filesize

        2.2MB

      • memory/1584-26-0x0000000061E00000-0x0000000061EF3000-memory.dmp

        Filesize

        972KB

      • memory/1584-135-0x0000000000700000-0x0000000000800000-memory.dmp

        Filesize

        1024KB

      • memory/1584-131-0x0000000000400000-0x000000000063B000-memory.dmp

        Filesize

        2.2MB

      • memory/1584-119-0x0000000000400000-0x000000000063B000-memory.dmp

        Filesize

        2.2MB

      • memory/1584-23-0x0000000000220000-0x0000000000247000-memory.dmp

        Filesize

        156KB

      • memory/1584-22-0x0000000000700000-0x0000000000800000-memory.dmp

        Filesize

        1024KB

      • memory/1584-98-0x0000000000700000-0x0000000000800000-memory.dmp

        Filesize

        1024KB

      • memory/1584-81-0x0000000000400000-0x000000000063B000-memory.dmp

        Filesize

        2.2MB

      • memory/1584-24-0x0000000000400000-0x000000000063B000-memory.dmp

        Filesize

        2.2MB

      • memory/1740-3-0x0000000000400000-0x00000000004A5000-memory.dmp

        Filesize

        660KB

      • memory/1740-1-0x00000000008D0000-0x00000000009D0000-memory.dmp

        Filesize

        1024KB

      • memory/1740-2-0x0000000000750000-0x00000000007B7000-memory.dmp

        Filesize

        412KB

      • memory/1740-25-0x0000000000400000-0x00000000004A5000-memory.dmp

        Filesize

        660KB

      • memory/1740-71-0x0000000000400000-0x00000000004A5000-memory.dmp

        Filesize

        660KB

      • memory/1740-118-0x00000000037C0000-0x0000000003CF0000-memory.dmp

        Filesize

        5.2MB

      • memory/1740-72-0x00000000037C0000-0x0000000003CF0000-memory.dmp

        Filesize

        5.2MB

      • memory/1740-75-0x00000000037C0000-0x0000000003CF0000-memory.dmp

        Filesize

        5.2MB

      • memory/1740-74-0x00000000008D0000-0x00000000009D0000-memory.dmp

        Filesize

        1024KB

      • memory/2288-152-0x0000000000EF0000-0x0000000000F0E000-memory.dmp

        Filesize

        120KB

      • memory/2288-175-0x0000000071BB0000-0x000000007229E000-memory.dmp

        Filesize

        6.9MB

      • memory/2288-177-0x0000000000C10000-0x0000000000C50000-memory.dmp

        Filesize

        256KB

      • memory/2288-185-0x0000000071BB0000-0x000000007229E000-memory.dmp

        Filesize

        6.9MB

      • memory/2288-187-0x0000000000C10000-0x0000000000C50000-memory.dmp

        Filesize

        256KB

      • memory/2840-93-0x0000000000400000-0x0000000000930000-memory.dmp

        Filesize

        5.2MB

      • memory/2840-120-0x00000000001C0000-0x00000000001C1000-memory.dmp

        Filesize

        4KB

      • memory/2840-77-0x00000000001C0000-0x00000000001C1000-memory.dmp

        Filesize

        4KB

      • memory/2840-76-0x0000000000400000-0x0000000000930000-memory.dmp

        Filesize

        5.2MB

      • memory/2840-184-0x0000000000400000-0x0000000000930000-memory.dmp

        Filesize

        5.2MB