Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    09/01/2023, 21:21

General

  • Target
    file.exe
  • Size 322KB
  • Sample230109-z7bbaabc7x
  • SHA256 5f7d8c54d372f7a235109a2f808bbfb18680de898b71cf0eaae6d0e93af788c1
  • 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 cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • 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 2 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 20 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 20 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 12 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:4284
  • C:\Users\Admin\AppData\Local\Temp\27FA.exe
    C:\Users\Admin\AppData\Local\Temp\27FA.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:328
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\system32\rundll32.exe" "C:\Users\Admin\AppData\Local\Temp\Ryfererfh.tmp",Fwpthq
      2⤵
      • Blocklisted process makes network request
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Checks processor information in registry
      • Suspicious use of WriteProcessMemory
      PID:1632
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 22815
        3⤵
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:3116
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 328 -s 532
      2⤵
      • Program crash
      PID:4172
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 328 -ip 328
    1⤵
      PID:2936
    • C:\Users\Admin\AppData\Local\Temp\60BE.exe
      C:\Users\Admin\AppData\Local\Temp\60BE.exe
      1⤵
      • Executes dropped EXE
      PID:3608
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 3608 -s 1344
        2⤵
        • Program crash
        PID:4304
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 564 -p 3608 -ip 3608
      1⤵
        PID:2092
      • C:\Windows\System32\rundll32.exe
        C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
        1⤵
          PID:1796

        Network

              MITRE ATT&CK Enterprise v6

              Replay Monitor

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              Downloads

              27FA.exe

              • Path C:\Users\Admin\AppData\Local\Temp\27FA.exe
              • Size 1.1MB
              • SHA256 501c456bc8b1e903c5ced36bb85e054a4177580f49095c00bdb72b7ad115f587
              • MD5 SHA1 SHA512 SSDEEP

              27FA.exe

              • Path C:\Users\Admin\AppData\Local\Temp\27FA.exe
              • Size 1.1MB
              • SHA256 501c456bc8b1e903c5ced36bb85e054a4177580f49095c00bdb72b7ad115f587
              • MD5 SHA1 SHA512 SSDEEP

              60BE.exe

              • Path C:\Users\Admin\AppData\Local\Temp\60BE.exe
              • Size 340KB
              • SHA256 fba7392ec5c5b21009ff5353c10948bdd36a33d073bead32947f376807021ab3
              • MD5 SHA1 SHA512 SSDEEP

              60BE.exe

              • Path C:\Users\Admin\AppData\Local\Temp\60BE.exe
              • Size 340KB
              • SHA256 fba7392ec5c5b21009ff5353c10948bdd36a33d073bead32947f376807021ab3
              • MD5 SHA1 SHA512 SSDEEP

              Ryfererfh.tmp

              • Path C:\Users\Admin\AppData\Local\Temp\Ryfererfh.tmp
              • Size 817KB
              • SHA256 d71c0aaec63294fb11af30ff408e94b5fff656149da01e3f7a97e3026580d5c2
              • MD5 SHA1 SHA512 SSDEEP

              Ryfererfh.tmp

              • Path C:\Users\Admin\AppData\Local\Temp\Ryfererfh.tmp
              • Size 817KB
              • SHA256 d71c0aaec63294fb11af30ff408e94b5fff656149da01e3f7a97e3026580d5c2
              • MD5 SHA1 SHA512 SSDEEP

              memory/328-145-0x0000000000400000-0x000000000052F000-memory.dmp

              memory/328-139-0x000000000226E000-0x0000000002357000-memory.dmp

              memory/328-141-0x0000000000400000-0x000000000052F000-memory.dmp

              memory/328-140-0x0000000002360000-0x000000000248C000-memory.dmp

              memory/1632-159-0x0000000004D50000-0x0000000004E90000-memory.dmp

              memory/1632-154-0x0000000005390000-0x0000000005EEA000-memory.dmp

              memory/1632-167-0x0000000005390000-0x0000000005EEA000-memory.dmp

              memory/1632-164-0x0000000004DC9000-0x0000000004DCB000-memory.dmp

              memory/1632-160-0x0000000004D50000-0x0000000004E90000-memory.dmp

              memory/1632-158-0x0000000004D50000-0x0000000004E90000-memory.dmp

              memory/1632-157-0x0000000004D50000-0x0000000004E90000-memory.dmp

              memory/1632-156-0x0000000004D50000-0x0000000004E90000-memory.dmp

              memory/1632-155-0x0000000004D50000-0x0000000004E90000-memory.dmp

              memory/1632-153-0x0000000005390000-0x0000000005EEA000-memory.dmp

              memory/3116-162-0x0000023FF1730000-0x0000023FF1870000-memory.dmp

              memory/3116-166-0x0000023FEFCE0000-0x0000023FEFF8A000-memory.dmp

              memory/3116-165-0x0000000000900000-0x0000000000B99000-memory.dmp

              memory/3116-163-0x0000023FF1730000-0x0000023FF1870000-memory.dmp

              memory/3608-149-0x000000000079D000-0x00000000007B7000-memory.dmp

              memory/3608-152-0x0000000000400000-0x000000000045A000-memory.dmp

              memory/3608-150-0x00000000005A0000-0x00000000005CA000-memory.dmp

              memory/3608-151-0x0000000000400000-0x000000000045A000-memory.dmp

              memory/4284-132-0x000000000051E000-0x0000000000533000-memory.dmp

              memory/4284-133-0x0000000000610000-0x0000000000619000-memory.dmp

              memory/4284-134-0x0000000000400000-0x0000000000456000-memory.dmp

              memory/4284-135-0x0000000000400000-0x0000000000456000-memory.dmp