Analysis

  • max time kernel
    151s
  • max time network
    146s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27-11-2022 12:42

General

  • Target

    file.exe

  • Size

    151KB

  • MD5

    bf14f798fef9d4c0e57a419e49c969bb

  • SHA1

    f846d1529c88f0dcd5dd7207164b8670e9cf7e74

  • SHA256

    36c2e7fbf3282969bfceb2306a6943eafbaaa375cfc1304e718e7bb98ba4ad92

  • SHA512

    3ba059936fb74b0557b2035cf9a4f0686741efded03593382b766677ac7fb2ada5f84751e03a867fc6cdd9bf439c340a9eb8b80a7c607c386ea4d09b5a5b8084

  • SSDEEP

    3072:gjmlwqY3/sq0JlO8W5zoGZAcSzaIOG41+5B9DoqvrbLF:B7JqelOMggVj4UL9UqvLF

Malware Config

Signatures

  • Detects Smokeloader packer 1 IoCs
  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Blocklisted process makes network request 1 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 26 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 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\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    PID:3668
  • C:\Users\Admin\AppData\Local\Temp\833A.exe
    C:\Users\Admin\AppData\Local\Temp\833A.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:3264
    • C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\system32\rundll32.exe C:\Users\Admin\AppData\Local\Temp\Weheooup.dll,start
      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:3336
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 24189
        3⤵
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:5004
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /End /tn \Microsoft\Windows\Wininet\CacheTask
        3⤵
          PID:2272
        • C:\Windows\SysWOW64\schtasks.exe
          schtasks /Run /tn \Microsoft\Windows\Wininet\CacheTask
          3⤵
            PID:8
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3264 -s 484
          2⤵
          • Program crash
          PID:4968
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 3264 -ip 3264
        1⤵
          PID:4180
        • C:\Windows\System32\rundll32.exe
          C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
          1⤵
            PID:2312

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Users\Admin\AppData\Local\Temp\833A.exe

            Filesize

            3.6MB

            MD5

            197ffb1666df668c53cc8acfd15d5339

            SHA1

            b2235282145c432ad3301b37ca582eb34c7c4949

            SHA256

            29cfd5df736c08a06df4a2049b3bbcb244107f3c298135b0dd2ee33d87337d85

            SHA512

            961e788223b20d5f15d1b421e7ae9faa936152f5f0bbe3fbac80ebb8fba21378b6ffed08159da090072c100010cce3d1e1d1e67b6228464ff6f0c67c8f2233ab

          • C:\Users\Admin\AppData\Local\Temp\833A.exe

            Filesize

            3.6MB

            MD5

            197ffb1666df668c53cc8acfd15d5339

            SHA1

            b2235282145c432ad3301b37ca582eb34c7c4949

            SHA256

            29cfd5df736c08a06df4a2049b3bbcb244107f3c298135b0dd2ee33d87337d85

            SHA512

            961e788223b20d5f15d1b421e7ae9faa936152f5f0bbe3fbac80ebb8fba21378b6ffed08159da090072c100010cce3d1e1d1e67b6228464ff6f0c67c8f2233ab

          • C:\Users\Admin\AppData\Local\Temp\Weheooup.dll

            Filesize

            4.2MB

            MD5

            ae0fd9bfd79e70bd34482d128b38cb42

            SHA1

            3261c884a85848350db6e51f6c6955fbe6ff58a7

            SHA256

            ce1d153476035005414cd2ae69fb9404901245970ad00aa13379b2a35927ad19

            SHA512

            22ff1adf201faf058259239e409d02a72b1a8074a2a538134368af59a602bf0a4656171b0beb6be622a715ad4846b240fb86f2b40871d3a14c4ef88c84c7205b

          • C:\Users\Admin\AppData\Local\Temp\Weheooup.dll

            Filesize

            4.2MB

            MD5

            ae0fd9bfd79e70bd34482d128b38cb42

            SHA1

            3261c884a85848350db6e51f6c6955fbe6ff58a7

            SHA256

            ce1d153476035005414cd2ae69fb9404901245970ad00aa13379b2a35927ad19

            SHA512

            22ff1adf201faf058259239e409d02a72b1a8074a2a538134368af59a602bf0a4656171b0beb6be622a715ad4846b240fb86f2b40871d3a14c4ef88c84c7205b

          • memory/8-165-0x0000000000000000-mapping.dmp

          • memory/2272-163-0x0000000000000000-mapping.dmp

          • memory/3264-147-0x0000000000400000-0x00000000008EE000-memory.dmp

            Filesize

            4.9MB

          • memory/3264-136-0x0000000000000000-mapping.dmp

          • memory/3264-139-0x00000000025CC000-0x000000000294E000-memory.dmp

            Filesize

            3.5MB

          • memory/3264-140-0x0000000002950000-0x0000000002E32000-memory.dmp

            Filesize

            4.9MB

          • memory/3264-141-0x0000000000400000-0x00000000008EE000-memory.dmp

            Filesize

            4.9MB

          • memory/3264-142-0x0000000000400000-0x00000000008EE000-memory.dmp

            Filesize

            4.9MB

          • memory/3336-148-0x0000000000400000-0x000000000084D000-memory.dmp

            Filesize

            4.3MB

          • memory/3336-155-0x0000000005140000-0x0000000005280000-memory.dmp

            Filesize

            1.2MB

          • memory/3336-146-0x0000000000400000-0x000000000084D000-memory.dmp

            Filesize

            4.3MB

          • memory/3336-164-0x0000000003A90000-0x0000000004601000-memory.dmp

            Filesize

            11.4MB

          • memory/3336-157-0x0000000004710000-0x0000000004850000-memory.dmp

            Filesize

            1.2MB

          • memory/3336-149-0x0000000003A90000-0x0000000004601000-memory.dmp

            Filesize

            11.4MB

          • memory/3336-150-0x0000000003A90000-0x0000000004601000-memory.dmp

            Filesize

            11.4MB

          • memory/3336-151-0x0000000003A90000-0x0000000004601000-memory.dmp

            Filesize

            11.4MB

          • memory/3336-152-0x0000000004710000-0x0000000004850000-memory.dmp

            Filesize

            1.2MB

          • memory/3336-153-0x0000000004710000-0x0000000004850000-memory.dmp

            Filesize

            1.2MB

          • memory/3336-154-0x0000000005140000-0x0000000005280000-memory.dmp

            Filesize

            1.2MB

          • memory/3336-143-0x0000000000000000-mapping.dmp

          • memory/3336-156-0x0000000004710000-0x0000000004850000-memory.dmp

            Filesize

            1.2MB

          • memory/3668-133-0x00000000004D0000-0x00000000004D9000-memory.dmp

            Filesize

            36KB

          • memory/3668-134-0x0000000000400000-0x000000000045B000-memory.dmp

            Filesize

            364KB

          • memory/3668-135-0x0000000000400000-0x000000000045B000-memory.dmp

            Filesize

            364KB

          • memory/3668-132-0x000000000056D000-0x000000000057D000-memory.dmp

            Filesize

            64KB

          • memory/5004-158-0x00007FF7FB3F6890-mapping.dmp

          • memory/5004-160-0x0000023D535B0000-0x0000023D536F0000-memory.dmp

            Filesize

            1.2MB

          • memory/5004-159-0x0000023D535B0000-0x0000023D536F0000-memory.dmp

            Filesize

            1.2MB

          • memory/5004-161-0x0000000000850000-0x0000000000AEB000-memory.dmp

            Filesize

            2.6MB

          • memory/5004-162-0x0000023D51B60000-0x0000023D51E0C000-memory.dmp

            Filesize

            2.7MB