Analysis

  • max time kernel
    161s
  • max time network
    169s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-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
  • Checks computer location settings 2 TTPs 3 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 2 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 3 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).

  • Program crash 1 IoCs
  • 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 27 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\aaba138e7e153d2f77eead98fa84ad73f499081057cefa0d77c5bb705c4c818d.exe
    "C:\Users\Admin\AppData\Local\Temp\aaba138e7e153d2f77eead98fa84ad73f499081057cefa0d77c5bb705c4c818d.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:504
    • C:\Users\Admin\AppData\Local\Temp\ue0.0.exe
      "C:\Users\Admin\AppData\Local\Temp\ue0.0.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:960
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\AEHDAKFIJJ.exe"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4436
        • C:\Users\Admin\AppData\Local\Temp\AEHDAKFIJJ.exe
          "C:\Users\Admin\AppData\Local\Temp\AEHDAKFIJJ.exe"
          4⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1448
          • 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\AEHDAKFIJJ.exe
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:4036
            • C:\Windows\SysWOW64\PING.EXE
              ping 2.2.2.2 -n 1 -w 3000
              6⤵
              • Runs ping.exe
              PID:1664
    • C:\Users\Admin\AppData\Local\Temp\ue0.1.exe
      "C:\Users\Admin\AppData\Local\Temp\ue0.1.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:3064
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\Temp\Task.bat" "
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4164
        • C:\Windows\SysWOW64\chcp.com
          chcp 1251
          4⤵
            PID:3252
          • 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:2424
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 504 -s 1156
        2⤵
        • Program crash
        PID:3460
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 504 -ip 504
      1⤵
        PID:3156

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\ProgramData\Are.docx

        Filesize

        11KB

        MD5

        a33e5b189842c5867f46566bdbf7a095

        SHA1

        e1c06359f6a76da90d19e8fd95e79c832edb3196

        SHA256

        5abf8e3d1f78de7b09d7f6fb87f9e80e60caacf13ef3c1289665653dacd7c454

        SHA512

        f2ad3812ec9b915e9618539b0f103f2e9acaad25fbbacd84941c954ce070af231324e83a4621e951c1dbae8d40d50410954e40dd52bbd46e34c54b0d1957407b

      • C:\ProgramData\mozglue.dll

        Filesize

        593KB

        MD5

        c8fd9be83bc728cc04beffafc2907fe9

        SHA1

        95ab9f701e0024cedfbd312bcfe4e726744c4f2e

        SHA256

        ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

        SHA512

        fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

      • C:\ProgramData\nss3.dll

        Filesize

        2.0MB

        MD5

        1cc453cdf74f31e4d913ff9c10acdde2

        SHA1

        6e85eae544d6e965f15fa5c39700fa7202f3aafe

        SHA256

        ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

        SHA512

        dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

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

        Filesize

        101KB

        MD5

        42b838cf8bdf67400525e128d917f6e0

        SHA1

        a578f6faec738912dba8c41e7abe1502c46d0cae

        SHA256

        0e4ffba62ce9a464aa1b7ff9f1e55ace8f51ff1e15102d856f801a81f8b4607d

        SHA512

        f64b39d885375251ab7db72c57dc5b5095f0c6412169f1035d1f6a25b8415a2a01004d06bfa0267cf683ef7dea7a9f969ad43fde5a4376f1fcb65a57403433c0

      • C:\Users\Admin\AppData\Local\Temp\ue0.0.exe

        Filesize

        252KB

        MD5

        ffcf4340a3f7e5b97f28a894b0330487

        SHA1

        b7a98752e3853d4fa85d94490d34496fdcf18dbd

        SHA256

        d6c0979656434a63303a43a9003a30840e1dcd23ff502a255bbbe8609fa6248d

        SHA512

        e3e6855c78fe7aa5f07e7fcb2994a13aa556a57d1eea45535cb9610a32895d236cc379d24618de0b210487a3c2b8f13be8975b8faccf7ff3f9689466f8f73e08

      • C:\Users\Admin\AppData\Local\Temp\ue0.1.exe

        Filesize

        1.7MB

        MD5

        eee5ddcffbed16222cac0a1b4e2e466e

        SHA1

        28b40c88b8ea50b0782e2bcbb4cc0f411035f3d5

        SHA256

        2a40e5dccc7526c4982334941c90f95374460e2a816e84e724e98c4d52ae8c54

        SHA512

        8f88901f3ebd425818db09f268df19ccf8a755603f04e9481bcf02b112a84393f8a900ead77f8f971bfa33fd9fa5636b7494aaee864a0fb04e3273911a4216dc

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

        Filesize

        128B

        MD5

        11bb3db51f701d4e42d3287f71a6a43e

        SHA1

        63a4ee82223be6a62d04bdfe40ef8ba91ae49a86

        SHA256

        6be22058abfb22b40a42fb003f86b89e204a83024c03eb82cd53e2a0a047c331

        SHA512

        907ad2c070cc1db89f43459a94d7f48985d939d749c9648b78572a266f0d3fde47813a129e9151dbf4a7d96d36f588172f57c88b8b947b56ed818d7d068abab2

      • memory/504-2-0x0000000002220000-0x0000000002287000-memory.dmp

        Filesize

        412KB

      • memory/504-75-0x0000000002220000-0x0000000002287000-memory.dmp

        Filesize

        412KB

      • memory/504-3-0x0000000000400000-0x00000000004A5000-memory.dmp

        Filesize

        660KB

      • memory/504-30-0x0000000000400000-0x00000000004A5000-memory.dmp

        Filesize

        660KB

      • memory/504-1-0x0000000000600000-0x0000000000700000-memory.dmp

        Filesize

        1024KB

      • memory/960-127-0x0000000000400000-0x000000000063B000-memory.dmp

        Filesize

        2.2MB

      • memory/960-80-0x0000000000400000-0x000000000063B000-memory.dmp

        Filesize

        2.2MB

      • memory/960-117-0x00000000006B0000-0x00000000007B0000-memory.dmp

        Filesize

        1024KB

      • memory/960-115-0x0000000000400000-0x000000000063B000-memory.dmp

        Filesize

        2.2MB

      • memory/960-17-0x0000000000680000-0x00000000006A7000-memory.dmp

        Filesize

        156KB

      • memory/960-33-0x0000000061E00000-0x0000000061EF3000-memory.dmp

        Filesize

        972KB

      • memory/960-18-0x0000000000400000-0x000000000063B000-memory.dmp

        Filesize

        2.2MB

      • memory/960-16-0x00000000006B0000-0x00000000007B0000-memory.dmp

        Filesize

        1024KB

      • memory/960-124-0x0000000000400000-0x000000000063B000-memory.dmp

        Filesize

        2.2MB

      • memory/1448-134-0x0000000005840000-0x0000000005850000-memory.dmp

        Filesize

        64KB

      • memory/1448-138-0x00000000722F0000-0x0000000072AA0000-memory.dmp

        Filesize

        7.7MB

      • memory/1448-133-0x00000000722F0000-0x0000000072AA0000-memory.dmp

        Filesize

        7.7MB

      • memory/1448-139-0x0000000005840000-0x0000000005850000-memory.dmp

        Filesize

        64KB

      • memory/1448-132-0x0000000000EC0000-0x0000000000EDE000-memory.dmp

        Filesize

        120KB

      • memory/3064-32-0x0000000000B10000-0x0000000000B11000-memory.dmp

        Filesize

        4KB

      • memory/3064-31-0x0000000000400000-0x0000000000930000-memory.dmp

        Filesize

        5.2MB

      • memory/3064-118-0x0000000000B10000-0x0000000000B11000-memory.dmp

        Filesize

        4KB

      • memory/3064-96-0x0000000000400000-0x0000000000930000-memory.dmp

        Filesize

        5.2MB