Analysis

  • max time kernel
    151s
  • max time network
    143s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/11/2022, 19:36

General

  • Target
    d9cc1fe48527aa1b84e1d71f8c1ce0f5.exe
  • Size 292KB
  • Sample221104-ya9bdaadb6
  • SHA256 6d3b969da0f3f4969cd290dcdf822a82936bbf0cd178a8d4ca7f92e45b3e08c5
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Detects Smokeloader packer 1 IoCs
  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Downloads MZ/PE file
  • Executes dropped EXE 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 3 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 45 IoCs

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

  • Modifies Internet Explorer settings 1 TTPs 4 IoCs
  • Modifies registry class 19 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 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 7 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d9cc1fe48527aa1b84e1d71f8c1ce0f5.exe
    "C:\Users\Admin\AppData\Local\Temp\d9cc1fe48527aa1b84e1d71f8c1ce0f5.exe"
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    PID:3968
  • C:\Users\Admin\AppData\Local\Temp\886A.exe
    C:\Users\Admin\AppData\Local\Temp\886A.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Checks processor information in registry
    • Suspicious use of WriteProcessMemory
    PID:3432
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3432 -s 828
      2⤵
      • Program crash
      PID:5068
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3432 -s 856
      2⤵
      • Program crash
      PID:2180
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3432 -s 1004
      2⤵
      • Program crash
      PID:3620
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\syswow64\rundll32.exe" "C:\Windows\syswow64\shell32.dll",#61
      2⤵
      • Checks processor information in registry
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      PID:3028
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3432 -ip 3432
    1⤵
      PID:4960
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 3432 -ip 3432
      1⤵
        PID:228
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 544 -p 3432 -ip 3432
        1⤵
          PID:4528

        Network

              MITRE ATT&CK Enterprise v6

              Replay Monitor

              Loading Replay Monitor...

              Downloads

              684259a6-0175-4108-a860-699cb31f63c2.tmp

              • Path C:\Users\Admin\AppData\Local\Temp\684259a6-0175-4108-a860-699cb31f63c2.tmp
              • Size 23KB
              • SHA256 ee80340a02c0f96a3f9d01e635857d38d7b92444d6102ee29804f559f2eaa7f4
              • MD5 SHA1 SHA512 SSDEEP

              886A.exe

              • Path C:\Users\Admin\AppData\Local\Temp\886A.exe
              • Size 4.9MB
              • SHA256 a89e9d77c3da116fa19821acf9e6ac4f78f9e8ec0a57f67f407aa29cc334eabf
              • MD5 SHA1 SHA512 SSDEEP

              886A.exe

              • Path C:\Users\Admin\AppData\Local\Temp\886A.exe
              • Size 4.9MB
              • SHA256 a89e9d77c3da116fa19821acf9e6ac4f78f9e8ec0a57f67f407aa29cc334eabf
              • MD5 SHA1 SHA512 SSDEEP

              AdobeSFX.log

              • Path C:\Users\Admin\AppData\Local\Temp\AdobeSFX.log
              • Size 1KB
              • SHA256 57c21ab757836c1979c5ea959cf760f7d2f88771ba6edfee4848f9f9bff6868a
              • MD5 SHA1 SHA512

              Microsoft .NET Framework 4.7.2 Setup_20220812_191538705.html

              • Path C:\Users\Admin\AppData\Local\Temp\Microsoft .NET Framework 4.7.2 Setup_20220812_191538705.html
              • Size 94KB
              • SHA256 0be98a2f88b59cc8a14e48b604678303a0855a629751c2a31940a7b4073fa5a3
              • MD5 SHA1 SHA512 SSDEEP

              Rpiidpytrto.tmp

              • Path C:\Users\Admin\AppData\Local\Temp\Rpiidpytrto.tmp
              • Size 3.5MB
              • SHA256 8c67a70fe070595fda6ec977af7da0085d40df299f04cdd5669156752fee3f31
              • MD5 SHA1 SHA512 SSDEEP

              dd_vcredistMSI4F4B.txt

              • Path C:\Users\Admin\AppData\Local\Temp\dd_vcredistMSI4F4B.txt
              • Size 413KB
              • SHA256 ccf2276146f20981947b6552f94b9587c4e2b2bba5cc98d922ece8bb4adb53f0
              • MD5 SHA1 SHA512 SSDEEP

              wct1510.tmp

              • Path C:\Users\Admin\AppData\Local\Temp\wct1510.tmp
              • Size 62KB
              • SHA256 094754a618b102b7ad0800dd4c9c02c882cf2d1e7996ba864f422fa4312427e1
              • MD5 SHA1 SHA512 SSDEEP

              memory/3028-164-0x00000000007D0000-0x000000000121A000-memory.dmp

              memory/3028-165-0x0000000002C80000-0x00000000037E9000-memory.dmp

              memory/3028-166-0x0000000003870000-0x00000000039B0000-memory.dmp

              memory/3028-167-0x0000000003870000-0x00000000039B0000-memory.dmp

              memory/3028-168-0x0000000002C80000-0x00000000037E9000-memory.dmp

              memory/3028-156-0x0000000003870000-0x00000000039B0000-memory.dmp

              memory/3028-157-0x0000000003870000-0x00000000039B0000-memory.dmp

              memory/3028-155-0x0000000002C80000-0x00000000037E9000-memory.dmp

              memory/3432-141-0x0000000000400000-0x00000000030CE000-memory.dmp

              memory/3432-143-0x0000000005E20000-0x0000000006989000-memory.dmp

              memory/3432-151-0x0000000006AF0000-0x0000000006C30000-memory.dmp

              memory/3432-152-0x0000000006AF0000-0x0000000006C30000-memory.dmp

              memory/3432-153-0x0000000006AF0000-0x0000000006C30000-memory.dmp

              memory/3432-149-0x0000000006AF0000-0x0000000006C30000-memory.dmp

              memory/3432-147-0x0000000006AF0000-0x0000000006C30000-memory.dmp

              memory/3432-148-0x0000000006AF0000-0x0000000006C30000-memory.dmp

              memory/3432-146-0x0000000006AF0000-0x0000000006C30000-memory.dmp

              memory/3432-145-0x0000000005E20000-0x0000000006989000-memory.dmp

              memory/3432-144-0x0000000005E20000-0x0000000006989000-memory.dmp

              memory/3432-150-0x0000000006AF0000-0x0000000006C30000-memory.dmp

              memory/3432-142-0x0000000000400000-0x00000000030CE000-memory.dmp

              memory/3432-170-0x0000000005E20000-0x0000000006989000-memory.dmp

              memory/3432-140-0x00000000051E0000-0x0000000005835000-memory.dmp

              memory/3432-139-0x0000000004D2B000-0x00000000051D5000-memory.dmp

              memory/3432-169-0x0000000000400000-0x00000000030CE000-memory.dmp

              memory/3968-134-0x0000000000400000-0x0000000002C37000-memory.dmp

              memory/3968-133-0x0000000002CC0000-0x0000000002CC9000-memory.dmp

              memory/3968-135-0x0000000000400000-0x0000000002C37000-memory.dmp

              memory/3968-132-0x0000000002CF8000-0x0000000002D0E000-memory.dmp