Analysis

  • max time kernel
    150s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    08-01-2024 20:48

General

  • Target

    d6069cb7acd4675b324603f2adc3e83fa7fa1829e73052a8d62a10f3d99a8200.exe

  • Size

    639KB

  • MD5

    92346d27eabac81e606d7153397e64e2

  • SHA1

    fd2b60f3663a6ffe24db4d8bd4d244bfd7e0ecaa

  • SHA256

    d6069cb7acd4675b324603f2adc3e83fa7fa1829e73052a8d62a10f3d99a8200

  • SHA512

    446b3f391e6f55bd1fb69969e74c42ba298bd06ab9509130e639da3e03f2720fa753921a1aec5c8e7732928d125a97a9ae2e0a2dbe7b705c1e183ab8a41c3063

  • SSDEEP

    12288:EMrWy90u8xoCoUCnq8yr2b2VmLKGQDzLfTf/1TW:ay9817x2wG+zHBW

Malware Config

Extracted

Family

smokeloader

Version

2022

C2

http://77.91.68.29/fks/

rc4.i32
rc4.i32

Signatures

  • Detect Mystic stealer payload 6 IoCs
  • Modifies Windows Defender Real-time Protection settings 3 TTPs 6 IoCs
  • Mystic

    Mystic is an infostealer written in C++.

  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Executes dropped EXE 4 IoCs
  • Loads dropped DLL 11 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Program crash 1 IoCs
  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d6069cb7acd4675b324603f2adc3e83fa7fa1829e73052a8d62a10f3d99a8200.exe
    "C:\Users\Admin\AppData\Local\Temp\d6069cb7acd4675b324603f2adc3e83fa7fa1829e73052a8d62a10f3d99a8200.exe"
    1⤵
    • Loads dropped DLL
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:2220
    • C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\ao8cz88.exe
      C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\ao8cz88.exe
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Adds Run key to start application
      • Suspicious use of WriteProcessMemory
      PID:2072
      • C:\Users\Admin\AppData\Local\Temp\IXP001.TMP\1Og26XL6.exe
        C:\Users\Admin\AppData\Local\Temp\IXP001.TMP\1Og26XL6.exe
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1372
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe"
          4⤵
          • Modifies Windows Defender Real-time Protection settings
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2668
      • C:\Users\Admin\AppData\Local\Temp\IXP001.TMP\2cS3266.exe
        C:\Users\Admin\AppData\Local\Temp\IXP001.TMP\2cS3266.exe
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2760
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe"
          4⤵
            PID:2992
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
            "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe"
            4⤵
            • Suspicious use of WriteProcessMemory
            PID:2720
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 2720 -s 268
              5⤵
              • Program crash
              PID:2572
      • C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\3dQ39Aq.exe
        C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\3dQ39Aq.exe
        2⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Checks SCSI registry key(s)
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: MapViewOfSection
        PID:2596

    Network

    MITRE ATT&CK Matrix ATT&CK v13

    Persistence

    Create or Modify System Process

    1
    T1543

    Windows Service

    1
    T1543.003

    Boot or Logon Autostart Execution

    1
    T1547

    Registry Run Keys / Startup Folder

    1
    T1547.001

    Privilege Escalation

    Create or Modify System Process

    1
    T1543

    Windows Service

    1
    T1543.003

    Boot or Logon Autostart Execution

    1
    T1547

    Registry Run Keys / Startup Folder

    1
    T1547.001

    Defense Evasion

    Modify Registry

    2
    T1112

    Impair Defenses

    1
    T1562

    Disable or Modify Tools

    1
    T1562.001

    Discovery

    Query Registry

    1
    T1012

    Peripheral Device Discovery

    1
    T1120

    System Information Discovery

    1
    T1082

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • \Users\Admin\AppData\Local\Temp\IXP000.TMP\3dQ39Aq.exe
      Filesize

      31KB

      MD5

      6c37f769c720938dd2223863c71e961e

      SHA1

      32f2c9e51dd144da0023f4ef81fdc15e11fc02da

      SHA256

      0d68b15aed1853a449c5baf28d7cb6249a18a47e3559010814b82b5fccc21caa

      SHA512

      0cb767ca9faf107944e0dcd469750910df9b5df7d9ddae0d33dbe28f86bab57f37eadf1f2405296b19e03e884e6316528009bbc29ef2b0b78cbf722afaa286ee

    • \Users\Admin\AppData\Local\Temp\IXP000.TMP\ao8cz88.exe
      Filesize

      515KB

      MD5

      a02e25299ae857551a4525647fc0533d

      SHA1

      72b43753b24d89b5383bfe1332dfec7413ddc00c

      SHA256

      fb9efd950ddab810501c8d3c22736d03896ef860696c06631c988c618f5bcf4c

      SHA512

      07877106f8540b38eda894fe7d67b1b99579bceee0d8e17e1fb191eabd95bdb45133509e6441e832dfe788132763aa2add4aef341b8f4f62fec2ddd3f5113dd0

    • \Users\Admin\AppData\Local\Temp\IXP001.TMP\1Og26XL6.exe
      Filesize

      869KB

      MD5

      5f0632d60d00f8f6ab677ee7f8727416

      SHA1

      ab4db63850568f0d3ea91e0c2665b59317fa22c9

      SHA256

      7247d13084eea57e8d80d6fdb483bb8ec4ad8a96c846e9c1193390829daeb08d

      SHA512

      254af7965a2d6662afa77650a79954bd754bc7727384bf7b4d60cae49c49c3bbc6173f4b461a3f1af5cafb5b83531a6ffe9660cd92ee3824f896f8861c76dbc9

    • \Users\Admin\AppData\Local\Temp\IXP001.TMP\2cS3266.exe
      Filesize

      1.0MB

      MD5

      a5a72ed79ae5e9780a11e88e6c6853c2

      SHA1

      9c59ba2bdb9066bedc108596ed94633c824edec8

      SHA256

      4d29c049f541cf4cfc30160228c05c981a115b3890004fb839ff261b99b62051

      SHA512

      84b85e7ce7701c18bffba0a76a289ab8f43dffaa77604d2c4e3682feb3dd8e937a70b00aba3213c5303d3ffa7bfc7e97008d39505087ace7c3cce9baac9b9d88

    • memory/1240-71-0x0000000002580000-0x0000000002596000-memory.dmp
      Filesize

      88KB

    • memory/2220-70-0x00000000000C0000-0x00000000000C9000-memory.dmp
      Filesize

      36KB

    • memory/2220-58-0x00000000000C0000-0x00000000000C9000-memory.dmp
      Filesize

      36KB

    • memory/2596-72-0x0000000000400000-0x0000000000409000-memory.dmp
      Filesize

      36KB

    • memory/2596-69-0x0000000000020000-0x0000000000029000-memory.dmp
      Filesize

      36KB

    • memory/2596-68-0x0000000000400000-0x0000000000409000-memory.dmp
      Filesize

      36KB

    • memory/2668-31-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp
      Filesize

      4KB

    • memory/2668-34-0x0000000000400000-0x000000000040A000-memory.dmp
      Filesize

      40KB

    • memory/2668-23-0x0000000000400000-0x000000000040A000-memory.dmp
      Filesize

      40KB

    • memory/2668-25-0x0000000000400000-0x000000000040A000-memory.dmp
      Filesize

      40KB

    • memory/2668-27-0x0000000000400000-0x000000000040A000-memory.dmp
      Filesize

      40KB

    • memory/2668-29-0x0000000000400000-0x000000000040A000-memory.dmp
      Filesize

      40KB

    • memory/2668-32-0x0000000000400000-0x000000000040A000-memory.dmp
      Filesize

      40KB

    • memory/2668-36-0x0000000000400000-0x000000000040A000-memory.dmp
      Filesize

      40KB

    • memory/2720-48-0x0000000000400000-0x0000000000433000-memory.dmp
      Filesize

      204KB

    • memory/2720-53-0x0000000000400000-0x0000000000433000-memory.dmp
      Filesize

      204KB

    • memory/2720-49-0x0000000000400000-0x0000000000433000-memory.dmp
      Filesize

      204KB

    • memory/2720-47-0x0000000000400000-0x0000000000433000-memory.dmp
      Filesize

      204KB

    • memory/2720-67-0x0000000000400000-0x0000000000433000-memory.dmp
      Filesize

      204KB

    • memory/2720-55-0x0000000000400000-0x0000000000433000-memory.dmp
      Filesize

      204KB

    • memory/2720-51-0x0000000000400000-0x0000000000433000-memory.dmp
      Filesize

      204KB

    • memory/2720-50-0x0000000000400000-0x0000000000433000-memory.dmp
      Filesize

      204KB

    • memory/2720-46-0x0000000000400000-0x0000000000433000-memory.dmp
      Filesize

      204KB