Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14/01/2023, 03:59

General

  • Target
    file.exe
  • Size 261KB
  • Sample230114-ej24wahf32
  • SHA256 b68b7825ae5442d2a20fa8bd2b79753e45ee459f9179c7c492bbf237445260ac
  • 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 3 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 2 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 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 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\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    PID:1268
  • C:\Users\Admin\AppData\Local\Temp\E052.exe
    C:\Users\Admin\AppData\Local\Temp\E052.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:4932
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\system32\rundll32.exe" "C:\Users\Admin\AppData\Local\Temp\Rruwtqrefy.tmp",Uuhpdwiyer
      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:5032
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 17223
        3⤵
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:1932
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /End /tn \Microsoft\Windows\Wininet\CacheTask
        3⤵
          PID:1588
        • C:\Windows\SysWOW64\schtasks.exe
          schtasks /Run /tn \Microsoft\Windows\Wininet\CacheTask
          3⤵
            PID:4216
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4932 -s 540
          2⤵
          • Program crash
          PID:1304
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4932 -ip 4932
        1⤵
          PID:3208
        • C:\Users\Admin\AppData\Roaming\ceirdsv
          C:\Users\Admin\AppData\Roaming\ceirdsv
          1⤵
          • Executes dropped EXE
          • Checks SCSI registry key(s)
          • Suspicious behavior: MapViewOfSection
          PID:3128
        • C:\Windows\System32\rundll32.exe
          C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
          1⤵
            PID:4232

          Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

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                Downloads

                E052.exe

                • Path C:\Users\Admin\AppData\Local\Temp\E052.exe
                • Size 1.1MB
                • SHA256 957281bb67e54e66c9eadb569ac652cd3bc725341d7c4dd59fb3790353130cfc
                • MD5 SHA1 SHA512 SSDEEP

                E052.exe

                • Path C:\Users\Admin\AppData\Local\Temp\E052.exe
                • Size 1.1MB
                • SHA256 957281bb67e54e66c9eadb569ac652cd3bc725341d7c4dd59fb3790353130cfc
                • MD5 SHA1 SHA512 SSDEEP

                Rruwtqrefy.tmp

                • Path C:\Users\Admin\AppData\Local\Temp\Rruwtqrefy.tmp
                • Size 805KB
                • SHA256 c5cd7d52ba95127c18556a2ddca64e4ef80a2945e6579545c0067abdab3a0ad0
                • MD5 SHA1 SHA512 SSDEEP

                Rruwtqrefy.tmp

                • Path C:\Users\Admin\AppData\Local\Temp\Rruwtqrefy.tmp
                • Size 805KB
                • SHA256 c5cd7d52ba95127c18556a2ddca64e4ef80a2945e6579545c0067abdab3a0ad0
                • MD5 SHA1 SHA512 SSDEEP

                ceirdsv

                • Path C:\Users\Admin\AppData\Roaming\ceirdsv
                • Size 261KB
                • SHA256 b68b7825ae5442d2a20fa8bd2b79753e45ee459f9179c7c492bbf237445260ac
                • MD5 SHA1 SHA512 SSDEEP

                ceirdsv

                • Path C:\Users\Admin\AppData\Roaming\ceirdsv
                • Size 261KB
                • SHA256 b68b7825ae5442d2a20fa8bd2b79753e45ee459f9179c7c492bbf237445260ac
                • MD5 SHA1 SHA512 SSDEEP

                memory/1268-133-0x00000000047A0000-0x00000000047A9000-memory.dmp

                memory/1268-134-0x0000000000400000-0x0000000002BA9000-memory.dmp

                memory/1268-135-0x0000000000400000-0x0000000002BA9000-memory.dmp

                memory/1268-132-0x0000000002CBD000-0x0000000002CCE000-memory.dmp

                memory/1932-156-0x000002A3DAB50000-0x000002A3DAC90000-memory.dmp

                memory/1932-159-0x000002A3DACB0000-0x000002A3DAF59000-memory.dmp

                memory/1932-158-0x0000000000810000-0x0000000000AA8000-memory.dmp

                memory/1932-157-0x000002A3DAB50000-0x000002A3DAC90000-memory.dmp

                memory/3128-165-0x0000000000400000-0x0000000002BA9000-memory.dmp

                memory/3128-164-0x0000000000400000-0x0000000002BA9000-memory.dmp

                memory/3128-163-0x0000000002D5D000-0x0000000002D6E000-memory.dmp

                memory/4932-144-0x0000000000400000-0x0000000002C7D000-memory.dmp

                memory/4932-143-0x00000000049D0000-0x0000000004AF4000-memory.dmp

                memory/4932-142-0x00000000048DD000-0x00000000049C1000-memory.dmp

                memory/5032-152-0x00000000050A0000-0x00000000051E0000-memory.dmp

                memory/5032-146-0x0000000004470000-0x0000000004F9F000-memory.dmp

                memory/5032-145-0x0000000004470000-0x0000000004F9F000-memory.dmp

                memory/5032-154-0x00000000050A0000-0x00000000051E0000-memory.dmp

                memory/5032-161-0x0000000004470000-0x0000000004F9F000-memory.dmp

                memory/5032-147-0x00000000050A0000-0x00000000051E0000-memory.dmp

                memory/5032-153-0x00000000050A0000-0x00000000051E0000-memory.dmp

                memory/5032-148-0x00000000050A0000-0x00000000051E0000-memory.dmp

                memory/5032-151-0x00000000050A0000-0x00000000051E0000-memory.dmp