Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12/01/2023, 09:38

General

  • Target
    file.exe
  • Size 267KB
  • Sample230112-ll2pfsbd7y
  • SHA256 3e8e9d2df4abc9f900477b39e1fc6a107b1371d7502c60b0cac2beb56b76ee0d
  • 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 2 IoCs
  • Loads dropped DLL 1 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 6 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 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 18 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    PID:808
  • C:\Users\Admin\AppData\Local\Temp\4575.exe
    C:\Users\Admin\AppData\Local\Temp\4575.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:3588
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\system32\rundll32.exe" "C:\Users\Admin\AppData\Local\Temp\Qytyaworpiotpd.tmp",Edoqqdswdffqipe
      2⤵
      • Blocklisted process makes network request
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Checks processor information in registry
      • Suspicious use of WriteProcessMemory
      PID:2480
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 23796
        3⤵
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:1700
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3588 -s 532
      2⤵
      • Program crash
      PID:2624
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3588 -ip 3588
    1⤵
      PID:924
    • C:\Windows\System32\rundll32.exe
      C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
      1⤵
        PID:3868
      • C:\Users\Admin\AppData\Roaming\ssaeirs
        C:\Users\Admin\AppData\Roaming\ssaeirs
        1⤵
        • Executes dropped EXE
        • Checks SCSI registry key(s)
        • Suspicious behavior: MapViewOfSection
        PID:2172

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

            4575.exe

            • Path C:\Users\Admin\AppData\Local\Temp\4575.exe
            • Size 1.1MB
            • SHA256 d23acb446003abbcda47a34e5d38923d4d66fdb69c9583dcf3d506574ce16d64
            • MD5 SHA1 SHA512 SSDEEP

            4575.exe

            • Path C:\Users\Admin\AppData\Local\Temp\4575.exe
            • Size 1.1MB
            • SHA256 d23acb446003abbcda47a34e5d38923d4d66fdb69c9583dcf3d506574ce16d64
            • MD5 SHA1 SHA512 SSDEEP

            Qytyaworpiotpd.tmp

            • Path C:\Users\Admin\AppData\Local\Temp\Qytyaworpiotpd.tmp
            • Size 752KB
            • SHA256 72021339c18f79141f9867c30616cbbdc517471e44d16bfe81063e5c7dba56c3
            • MD5 SHA1 SHA512 SSDEEP

            Qytyaworpiotpd.tmp

            • Path C:\Users\Admin\AppData\Local\Temp\Qytyaworpiotpd.tmp
            • Size 752KB
            • SHA256 72021339c18f79141f9867c30616cbbdc517471e44d16bfe81063e5c7dba56c3
            • MD5 SHA1 SHA512 SSDEEP

            ssaeirs

            • Path C:\Users\Admin\AppData\Roaming\ssaeirs
            • Size 267KB
            • SHA256 3e8e9d2df4abc9f900477b39e1fc6a107b1371d7502c60b0cac2beb56b76ee0d
            • MD5 SHA1 SHA512 SSDEEP

            ssaeirs

            • Path C:\Users\Admin\AppData\Roaming\ssaeirs
            • Size 267KB
            • SHA256 3e8e9d2df4abc9f900477b39e1fc6a107b1371d7502c60b0cac2beb56b76ee0d
            • MD5 SHA1 SHA512 SSDEEP

            memory/808-132-0x0000000002DFD000-0x0000000002E0D000-memory.dmp

            memory/808-135-0x0000000000400000-0x0000000002BAB000-memory.dmp

            memory/808-134-0x0000000000400000-0x0000000002BAB000-memory.dmp

            memory/808-133-0x0000000002D40000-0x0000000002D49000-memory.dmp

            memory/1700-156-0x000001F9701F0000-0x000001F970330000-memory.dmp

            memory/1700-155-0x000001F9701F0000-0x000001F970330000-memory.dmp

            memory/1700-158-0x000001F96E920000-0x000001F96EBDB000-memory.dmp

            memory/1700-157-0x00000000004A0000-0x000000000074A000-memory.dmp

            memory/2172-164-0x0000000000400000-0x0000000002BAB000-memory.dmp

            memory/2172-162-0x0000000002E4D000-0x0000000002E5E000-memory.dmp

            memory/2172-163-0x0000000000400000-0x0000000002BAB000-memory.dmp

            memory/2480-148-0x00000000043D0000-0x0000000004510000-memory.dmp

            memory/2480-147-0x0000000005DE0000-0x000000000693B000-memory.dmp

            memory/2480-152-0x00000000043D0000-0x0000000004510000-memory.dmp

            memory/2480-153-0x00000000043D0000-0x0000000004510000-memory.dmp

            memory/2480-150-0x00000000043D0000-0x0000000004510000-memory.dmp

            memory/2480-149-0x00000000043D0000-0x0000000004510000-memory.dmp

            memory/2480-146-0x0000000005DE0000-0x000000000693B000-memory.dmp

            memory/2480-151-0x00000000043D0000-0x0000000004510000-memory.dmp

            memory/2480-159-0x0000000005DE0000-0x000000000693B000-memory.dmp

            memory/3588-142-0x0000000000400000-0x0000000002C7C000-memory.dmp

            memory/3588-145-0x0000000000400000-0x0000000002C7C000-memory.dmp

            memory/3588-140-0x0000000004A30000-0x0000000004B50000-memory.dmp

            memory/3588-139-0x0000000004945000-0x0000000004A26000-memory.dmp