Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12-01-2023 07:28

General

  • Target

    cf9893e8bd9d67407ace5ddca23bfc4c6cca9525526a15f7c468251e7351cef3.exe

  • Size

    267KB

  • MD5

    a75a93564ecf8a0d3e0f6c8c8640bd0e

  • SHA1

    e8faa28fa0c4375a89a5976a0d1e7e940094cbcf

  • SHA256

    cf9893e8bd9d67407ace5ddca23bfc4c6cca9525526a15f7c468251e7351cef3

  • SHA512

    2199de4fa3f1129df4789d899b39b634af2e56baf3007b472d2edc8fa4a7c623a30bace4e0b3d8344c92ad6a5b37b4404c60298a3fef94762e7a3a37bb3b11b9

  • SSDEEP

    3072:IKXE2D28LUd6aAsnD54I0HJkTduHRf6d16AwHtebdxfi3P1MPx76b5qWbyajt:HjLhsnkUduHRfBAOebdQ/1M5gq+

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 27 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 23 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\cf9893e8bd9d67407ace5ddca23bfc4c6cca9525526a15f7c468251e7351cef3.exe
    "C:\Users\Admin\AppData\Local\Temp\cf9893e8bd9d67407ace5ddca23bfc4c6cca9525526a15f7c468251e7351cef3.exe"
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    PID:520
  • C:\Users\Admin\AppData\Local\Temp\E554.exe
    C:\Users\Admin\AppData\Local\Temp\E554.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:3044
    • 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
      • 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:3384
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 23789
        3⤵
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:2876
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /End /tn \Microsoft\Windows\Wininet\CacheTask
        3⤵
          PID:4368
        • C:\Windows\SysWOW64\schtasks.exe
          schtasks /Run /tn \Microsoft\Windows\Wininet\CacheTask
          3⤵
            PID:5060
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3044 -s 532
          2⤵
          • Program crash
          PID:4424
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 3044 -ip 3044
        1⤵
          PID:3628
        • C:\Windows\System32\rundll32.exe
          C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
          1⤵
            PID:4140
          • C:\Users\Admin\AppData\Roaming\tfsafga
            C:\Users\Admin\AppData\Roaming\tfsafga
            1⤵
            • Executes dropped EXE
            • Checks SCSI registry key(s)
            • Suspicious behavior: MapViewOfSection
            PID:896

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          • C:\Users\Admin\AppData\Local\Temp\E554.exe

            Filesize

            1.1MB

            MD5

            6d0612cec73c415e819d7f954c642797

            SHA1

            f433990478114d51e2f06618667a33711d102a55

            SHA256

            e2d0576bdb4bd674984ac54c6efc80fe15037802b8e1ed2b9d194a8e744e5f0c

            SHA512

            2dc7c46f1101b63e985aa9aadc1858c735ebbd303213468a171ea7ade4da87d6fcd56bc839f1feaec758dbb0358866f7aa9139ec8162a9159211c78eb9ea0b8f

          • C:\Users\Admin\AppData\Local\Temp\E554.exe

            Filesize

            1.1MB

            MD5

            6d0612cec73c415e819d7f954c642797

            SHA1

            f433990478114d51e2f06618667a33711d102a55

            SHA256

            e2d0576bdb4bd674984ac54c6efc80fe15037802b8e1ed2b9d194a8e744e5f0c

            SHA512

            2dc7c46f1101b63e985aa9aadc1858c735ebbd303213468a171ea7ade4da87d6fcd56bc839f1feaec758dbb0358866f7aa9139ec8162a9159211c78eb9ea0b8f

          • C:\Users\Admin\AppData\Local\Temp\Qytyaworpiotpd.tmp

            Filesize

            752KB

            MD5

            710af73b2d7e92d33fac751318c08101

            SHA1

            2208c96a528b1d96e18ae47ab274f303e4099fff

            SHA256

            72021339c18f79141f9867c30616cbbdc517471e44d16bfe81063e5c7dba56c3

            SHA512

            1f19138b8412b871ccf33ec351d28157b6571bc02cb1d338fc4c06bd77e9518bbdb3392d63b9bcdde2bd94746c232f90b4796363f83cecfd49e0470b6495ac1a

          • C:\Users\Admin\AppData\Local\Temp\Qytyaworpiotpd.tmp

            Filesize

            752KB

            MD5

            710af73b2d7e92d33fac751318c08101

            SHA1

            2208c96a528b1d96e18ae47ab274f303e4099fff

            SHA256

            72021339c18f79141f9867c30616cbbdc517471e44d16bfe81063e5c7dba56c3

            SHA512

            1f19138b8412b871ccf33ec351d28157b6571bc02cb1d338fc4c06bd77e9518bbdb3392d63b9bcdde2bd94746c232f90b4796363f83cecfd49e0470b6495ac1a

          • C:\Users\Admin\AppData\Roaming\tfsafga

            Filesize

            267KB

            MD5

            a75a93564ecf8a0d3e0f6c8c8640bd0e

            SHA1

            e8faa28fa0c4375a89a5976a0d1e7e940094cbcf

            SHA256

            cf9893e8bd9d67407ace5ddca23bfc4c6cca9525526a15f7c468251e7351cef3

            SHA512

            2199de4fa3f1129df4789d899b39b634af2e56baf3007b472d2edc8fa4a7c623a30bace4e0b3d8344c92ad6a5b37b4404c60298a3fef94762e7a3a37bb3b11b9

          • C:\Users\Admin\AppData\Roaming\tfsafga

            Filesize

            267KB

            MD5

            a75a93564ecf8a0d3e0f6c8c8640bd0e

            SHA1

            e8faa28fa0c4375a89a5976a0d1e7e940094cbcf

            SHA256

            cf9893e8bd9d67407ace5ddca23bfc4c6cca9525526a15f7c468251e7351cef3

            SHA512

            2199de4fa3f1129df4789d899b39b634af2e56baf3007b472d2edc8fa4a7c623a30bace4e0b3d8344c92ad6a5b37b4404c60298a3fef94762e7a3a37bb3b11b9

          • memory/520-135-0x0000000000400000-0x0000000002BAB000-memory.dmp

            Filesize

            39.7MB

          • memory/520-134-0x0000000000400000-0x0000000002BAB000-memory.dmp

            Filesize

            39.7MB

          • memory/520-133-0x00000000048E0000-0x00000000048E9000-memory.dmp

            Filesize

            36KB

          • memory/520-132-0x0000000002F1D000-0x0000000002F2D000-memory.dmp

            Filesize

            64KB

          • memory/896-166-0x0000000000400000-0x0000000002BAB000-memory.dmp

            Filesize

            39.7MB

          • memory/896-165-0x0000000000400000-0x0000000002BAB000-memory.dmp

            Filesize

            39.7MB

          • memory/896-164-0x0000000002FAD000-0x0000000002FBE000-memory.dmp

            Filesize

            68KB

          • memory/2876-156-0x000002188AEF0000-0x000002188B030000-memory.dmp

            Filesize

            1.2MB

          • memory/2876-155-0x000002188AEF0000-0x000002188B030000-memory.dmp

            Filesize

            1.2MB

          • memory/2876-158-0x0000021889490000-0x000002188974B000-memory.dmp

            Filesize

            2.7MB

          • memory/2876-157-0x0000000000090000-0x000000000033A000-memory.dmp

            Filesize

            2.7MB

          • memory/2876-154-0x00007FF605BC6890-mapping.dmp

          • memory/3044-136-0x0000000000000000-mapping.dmp

          • memory/3044-142-0x00000000048EA000-0x00000000049CB000-memory.dmp

            Filesize

            900KB

          • memory/3044-143-0x00000000049D0000-0x0000000004AF0000-memory.dmp

            Filesize

            1.1MB

          • memory/3044-144-0x0000000000400000-0x0000000002C7C000-memory.dmp

            Filesize

            40.5MB

          • memory/3044-145-0x0000000000400000-0x0000000002C7C000-memory.dmp

            Filesize

            40.5MB

          • memory/3384-151-0x0000000004420000-0x0000000004560000-memory.dmp

            Filesize

            1.2MB

          • memory/3384-153-0x0000000004420000-0x0000000004560000-memory.dmp

            Filesize

            1.2MB

          • memory/3384-152-0x0000000004420000-0x0000000004560000-memory.dmp

            Filesize

            1.2MB

          • memory/3384-146-0x0000000004A80000-0x00000000055DB000-memory.dmp

            Filesize

            11.4MB

          • memory/3384-160-0x0000000004A80000-0x00000000055DB000-memory.dmp

            Filesize

            11.4MB

          • memory/3384-150-0x0000000004420000-0x0000000004560000-memory.dmp

            Filesize

            1.2MB

          • memory/3384-149-0x0000000004420000-0x0000000004560000-memory.dmp

            Filesize

            1.2MB

          • memory/3384-148-0x0000000004420000-0x0000000004560000-memory.dmp

            Filesize

            1.2MB

          • memory/3384-139-0x0000000000000000-mapping.dmp

          • memory/3384-147-0x0000000004A80000-0x00000000055DB000-memory.dmp

            Filesize

            11.4MB

          • memory/4368-159-0x0000000000000000-mapping.dmp

          • memory/5060-161-0x0000000000000000-mapping.dmp