Analysis

  • max time kernel
    150s
  • 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
    25/12/2022, 14:09

General

  • Target
    file.exe
  • Size 231KB
  • Sample221225-rf4jrabf28
  • SHA256 e99c244d18109241d4d06fd116eb651b1fb9eb06208eace3326cdf8d64098815
  • 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
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 27 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 18 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 22 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of UnmapMainImage 1 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:2420
  • C:\Users\Admin\AppData\Local\Temp\FB4D.exe
    C:\Users\Admin\AppData\Local\Temp\FB4D.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:1156
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\system32\rundll32.exe" "C:\Users\Admin\AppData\Local\Temp\Dfuqft.tmp",Dsdupihuqo
      2⤵
      • Blocklisted process makes network request
      • Sets service image path in registry
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Drops file in Program Files directory
      • Checks processor information in registry
      • Suspicious use of WriteProcessMemory
      PID:3116
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 22317
        3⤵
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:4332
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1156 -s 468
      2⤵
      • Program crash
      PID:4576
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 1156 -ip 1156
    1⤵
      PID:1136
    • C:\Users\Admin\AppData\Roaming\uhassag
      C:\Users\Admin\AppData\Roaming\uhassag
      1⤵
      • Executes dropped EXE
      • Checks SCSI registry key(s)
      • Suspicious behavior: MapViewOfSection
      PID:1092
    • C:\Windows\System32\rundll32.exe
      C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
      1⤵
        PID:1348
      • C:\Windows\SysWOW64\svchost.exe
        C:\Windows\SysWOW64\svchost.exe -k LocalService
        1⤵
          PID:3500

        Network

              MITRE ATT&CK Enterprise v6

              Replay Monitor

              Loading Replay Monitor...

              Downloads

              Dfuqft.tmp

              • Path C:\Users\Admin\AppData\Local\Temp\Dfuqft.tmp
              • Size 792KB
              • SHA256 2c683e8b9889636eb8279bdb6cf9181e939021acb2cbbed109b27aab6f47861d
              • MD5 SHA1 SHA512 SSDEEP

              Dfuqft.tmp

              • Path C:\Users\Admin\AppData\Local\Temp\Dfuqft.tmp
              • Size 792KB
              • SHA256 2c683e8b9889636eb8279bdb6cf9181e939021acb2cbbed109b27aab6f47861d
              • MD5 SHA1 SHA512 SSDEEP

              FB4D.exe

              • Path C:\Users\Admin\AppData\Local\Temp\FB4D.exe
              • Size 1.1MB
              • SHA256 29c8f4e86f33285254e07c7f513c4155a65bfb2c6e308e39b0d90f50fec40797
              • MD5 SHA1 SHA512 SSDEEP

              FB4D.exe

              • Path C:\Users\Admin\AppData\Local\Temp\FB4D.exe
              • Size 1.1MB
              • SHA256 29c8f4e86f33285254e07c7f513c4155a65bfb2c6e308e39b0d90f50fec40797
              • MD5 SHA1 SHA512 SSDEEP

              uhassag

              • Path C:\Users\Admin\AppData\Roaming\uhassag
              • Size 231KB
              • SHA256 e99c244d18109241d4d06fd116eb651b1fb9eb06208eace3326cdf8d64098815
              • MD5 SHA1 SHA512 SSDEEP

              uhassag

              • Path C:\Users\Admin\AppData\Roaming\uhassag
              • Size 231KB
              • SHA256 e99c244d18109241d4d06fd116eb651b1fb9eb06208eace3326cdf8d64098815
              • MD5 SHA1 SHA512 SSDEEP

              memory/388-162-0x0000000008140000-0x0000000008150000-memory.dmp

              memory/388-155-0x0000000007E60000-0x0000000007E70000-memory.dmp

              memory/388-184-0x0000000008140000-0x0000000008150000-memory.dmp

              memory/388-185-0x0000000008140000-0x0000000008150000-memory.dmp

              memory/388-164-0x0000000008140000-0x0000000008150000-memory.dmp

              memory/388-145-0x0000000007E60000-0x0000000007E70000-memory.dmp

              memory/388-146-0x0000000007E60000-0x0000000007E70000-memory.dmp

              memory/388-147-0x0000000007E60000-0x0000000007E70000-memory.dmp

              memory/388-148-0x0000000007E60000-0x0000000007E70000-memory.dmp

              memory/388-149-0x0000000007E60000-0x0000000007E70000-memory.dmp

              memory/388-150-0x0000000007E60000-0x0000000007E70000-memory.dmp

              memory/388-151-0x0000000007E60000-0x0000000007E70000-memory.dmp

              memory/388-152-0x0000000007E60000-0x0000000007E70000-memory.dmp

              memory/388-153-0x0000000007E60000-0x0000000007E70000-memory.dmp

              memory/388-154-0x0000000007E60000-0x0000000007E70000-memory.dmp

              memory/388-163-0x0000000008140000-0x0000000008150000-memory.dmp

              memory/388-156-0x0000000007E60000-0x0000000007E70000-memory.dmp

              memory/388-157-0x0000000007E60000-0x0000000007E70000-memory.dmp

              memory/388-158-0x0000000007E60000-0x0000000007E70000-memory.dmp

              memory/388-159-0x0000000007E60000-0x0000000007E70000-memory.dmp

              memory/388-160-0x0000000007E60000-0x0000000007E70000-memory.dmp

              memory/388-161-0x0000000007E60000-0x0000000007E70000-memory.dmp

              memory/388-183-0x0000000008140000-0x0000000008150000-memory.dmp

              memory/1092-187-0x0000000000400000-0x000000000045E000-memory.dmp

              memory/1092-182-0x0000000000400000-0x000000000045E000-memory.dmp

              memory/1092-181-0x00000000005ED000-0x00000000005FD000-memory.dmp

              memory/1156-144-0x0000000000400000-0x000000000053A000-memory.dmp

              memory/1156-143-0x0000000002310000-0x0000000002442000-memory.dmp

              memory/1156-141-0x0000000002222000-0x000000000230E000-memory.dmp

              memory/2420-134-0x0000000000400000-0x000000000045E000-memory.dmp

              memory/2420-135-0x0000000000400000-0x000000000045E000-memory.dmp

              memory/2420-132-0x000000000078D000-0x000000000079D000-memory.dmp

              memory/2420-133-0x00000000006F0000-0x00000000006F9000-memory.dmp

              memory/3116-168-0x0000000005F70000-0x00000000060B0000-memory.dmp

              memory/3116-173-0x0000000005F70000-0x00000000060B0000-memory.dmp

              memory/3116-174-0x0000000005F70000-0x00000000060B0000-memory.dmp

              memory/3116-167-0x0000000005F70000-0x00000000060B0000-memory.dmp

              memory/3116-186-0x00000000052C0000-0x0000000005E17000-memory.dmp

              memory/3116-171-0x0000000005F70000-0x00000000060B0000-memory.dmp

              memory/3116-178-0x0000000005FE9000-0x0000000005FEB000-memory.dmp

              memory/3116-172-0x0000000005F70000-0x00000000060B0000-memory.dmp

              memory/3116-166-0x00000000052C0000-0x0000000005E17000-memory.dmp

              memory/3116-165-0x00000000052C0000-0x0000000005E17000-memory.dmp

              memory/4332-180-0x0000025A9D860000-0x0000025A9DB1F000-memory.dmp

              memory/4332-179-0x0000000000510000-0x00000000007BE000-memory.dmp

              memory/4332-177-0x0000025A9F2C0000-0x0000025A9F400000-memory.dmp

              memory/4332-176-0x0000025A9F2C0000-0x0000025A9F400000-memory.dmp