Analysis

  • max time kernel
    150s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/01/2023, 17:11

General

  • Target
    34e405f5099eac8086c14c5b377889eb.exe
  • Size 365KB
  • Sample230104-vqaafagh87
  • SHA256 d3011742cf88e94ef8c9c6e6c9b6aa14e15fceb4eae2b2677e57e4123bb1ef4b
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Detects Smokeloader packer 1 IoCs
  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Blocklisted process makes network request 2 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Accesses Microsoft Outlook profiles 1 TTPs 4 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Program crash 1 IoCs
  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

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

  • Checks processor information in registry 2 TTPs 24 IoCs

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

  • Modifies Internet Explorer settings 1 TTPs 4 IoCs
  • Modifies registry class 30 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 19 IoCs
  • Suspicious use of FindShellTrayWindow 10 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\34e405f5099eac8086c14c5b377889eb.exe
    "C:\Users\Admin\AppData\Local\Temp\34e405f5099eac8086c14c5b377889eb.exe"
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    PID:1720
  • C:\Users\Admin\AppData\Local\Temp\1A5E.exe
    C:\Users\Admin\AppData\Local\Temp\1A5E.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:4808
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\system32\rundll32.exe" "C:\Users\Admin\AppData\Local\Temp\Oatedoqeryee.tmp",Yqiowyrat
      2⤵
      • Blocklisted process makes network request
      • Loads dropped DLL
      • Accesses Microsoft Outlook accounts
      • Accesses Microsoft Outlook profiles
      • Suspicious use of SetThreadContext
      • Checks processor information in registry
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      • outlook_office_path
      • outlook_win_path
      PID:4628
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 30943
        3⤵
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:3460
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /End /tn \Microsoft\Windows\Wininet\CacheTask
        3⤵
          PID:4896
        • C:\Windows\SysWOW64\schtasks.exe
          schtasks /Run /tn \Microsoft\Windows\Wininet\CacheTask
          3⤵
            PID:5000
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4808 -s 528
          2⤵
          • Program crash
          PID:1836
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 4808 -ip 4808
        1⤵
          PID:2512
        • C:\Windows\System32\rundll32.exe
          C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
          1⤵
            PID:3028

          Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

                Loading Replay Monitor...

                Downloads

                1A5E.exe

                • Path C:\Users\Admin\AppData\Local\Temp\1A5E.exe
                • Size 1.1MB
                • SHA256 e4ccd8bb164af7558d5a1dc6621aaa328228a68c2e2f5f4d43ec02d4491b5d58
                • MD5 SHA1 SHA512 SSDEEP

                1A5E.exe

                • Path C:\Users\Admin\AppData\Local\Temp\1A5E.exe
                • Size 1.1MB
                • SHA256 e4ccd8bb164af7558d5a1dc6621aaa328228a68c2e2f5f4d43ec02d4491b5d58
                • MD5 SHA1 SHA512 SSDEEP

                Oatedoqeryee.tmp

                • Path C:\Users\Admin\AppData\Local\Temp\Oatedoqeryee.tmp
                • Size 718KB
                • SHA256 200911b8faaea3104d1b51231d534e615fe755dc84024c1029aeafe1f842206b
                • MD5 SHA1 SHA512 SSDEEP

                Oatedoqeryee.tmp

                • Path C:\Users\Admin\AppData\Local\Temp\Oatedoqeryee.tmp
                • Size 718KB
                • SHA256 200911b8faaea3104d1b51231d534e615fe755dc84024c1029aeafe1f842206b
                • MD5 SHA1 SHA512 SSDEEP

                memory/1720-135-0x0000000000400000-0x0000000002C4E000-memory.dmp

                memory/1720-134-0x0000000000400000-0x0000000002C4E000-memory.dmp

                memory/1720-132-0x000000000300D000-0x0000000003022000-memory.dmp

                memory/1720-133-0x0000000002D90000-0x0000000002D99000-memory.dmp

                memory/3460-157-0x0000021EF6800000-0x0000021EF6AAE000-memory.dmp

                memory/3460-156-0x00000000003C0000-0x000000000065D000-memory.dmp

                memory/3460-155-0x0000021EF80C0000-0x0000021EF8200000-memory.dmp

                memory/3460-154-0x0000021EF80C0000-0x0000021EF8200000-memory.dmp

                memory/4628-152-0x0000000004E80000-0x0000000004FC0000-memory.dmp

                memory/4628-147-0x0000000004E80000-0x0000000004FC0000-memory.dmp

                memory/4628-148-0x0000000004E80000-0x0000000004FC0000-memory.dmp

                memory/4628-149-0x0000000004E80000-0x0000000004FC0000-memory.dmp

                memory/4628-150-0x0000000004E80000-0x0000000004FC0000-memory.dmp

                memory/4628-151-0x0000000004E80000-0x0000000004FC0000-memory.dmp

                memory/4628-146-0x0000000006CA0000-0x00000000077C0000-memory.dmp

                memory/4628-145-0x0000000006CA0000-0x00000000077C0000-memory.dmp

                memory/4628-159-0x0000000006CA0000-0x00000000077C0000-memory.dmp

                memory/4808-143-0x0000000004A60000-0x0000000004B6C000-memory.dmp

                memory/4808-142-0x000000000498A000-0x0000000004A59000-memory.dmp

                memory/4808-144-0x0000000000400000-0x0000000002D07000-memory.dmp