Analysis

  • max time kernel
    146s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13/01/2023, 06:18

General

  • Target
    file.exe
  • Size 283KB
  • Sample230113-g2lwqaae2w
  • SHA256 7b61c03b9aed5f7b1ad41da03b3e0d7f1d54d5b445a003d4df4f9db850ecc7ad
  • 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 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 24 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 19 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:1800
  • C:\Users\Admin\AppData\Local\Temp\C6B0.exe
    C:\Users\Admin\AppData\Local\Temp\C6B0.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:4212
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\system32\rundll32.exe" "C:\Users\Admin\AppData\Local\Temp\Rruwtqrefy.tmp",Uuhpdwiyer
      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:1908
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 17188
        3⤵
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:1900
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /End /tn \Microsoft\Windows\Wininet\CacheTask
        3⤵
          PID:4956
        • C:\Windows\SysWOW64\schtasks.exe
          schtasks /Run /tn \Microsoft\Windows\Wininet\CacheTask
          3⤵
            PID:4300
          • C:\Windows\SysWOW64\schtasks.exe
            schtasks /End /tn \Microsoft\Windows\Wininet\CacheTask
            3⤵
              PID:1952
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 4212 -s 560
            2⤵
            • Program crash
            PID:2632
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 4212 -ip 4212
          1⤵
            PID:864
          • C:\Windows\System32\rundll32.exe
            C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
            1⤵
              PID:1468
            • C:\Users\Admin\AppData\Roaming\rifutih
              C:\Users\Admin\AppData\Roaming\rifutih
              1⤵
              • Executes dropped EXE
              • Checks SCSI registry key(s)
              • Suspicious behavior: MapViewOfSection
              PID:3940
            • C:\Windows\SysWOW64\svchost.exe
              C:\Windows\SysWOW64\svchost.exe -k LocalService
              1⤵
                PID:4160
                • C:\Windows\SysWOW64\rundll32.exe
                  "C:\Windows\system32\rundll32.exe" "c:\program files (x86)\windows nt\tabletextservice\reviewers.dll",eSBZSjE=
                  2⤵
                    PID:3796

                Network

                      MITRE ATT&CK Enterprise v6

                      Replay Monitor

                      Loading Replay Monitor...

                      Downloads

                      reviewers.dll

                      • Path C:\Program Files (x86)\Windows NT\TableTextService\reviewers.dll
                      • Size 805KB
                      • SHA256 7d62d26c947ddba4857648fa06789d8f45060e498beb6a995bb39058da538242
                      • MD5 SHA1 SHA512 SSDEEP

                      reviewers.dll

                      • Path C:\Program Files (x86)\Windows NT\TableTextService\reviewers.dll
                      • Size 805KB
                      • SHA256 7d62d26c947ddba4857648fa06789d8f45060e498beb6a995bb39058da538242
                      • MD5 SHA1 SHA512 SSDEEP

                      Active.GRL

                      • Path C:\ProgramData\{D0B46527-7C45-A967-1A4D-5BBD0FF57755}\Active.GRL
                      • Size 14KB
                      • SHA256 bda9df3591bf7f67d4b31d23cffdcf927da6f00ae1b393f07aea69ba1c4344bc
                      • MD5 SHA1 SHA512 SSDEEP

                      Microsoft.Getstarted_8.2.22942.0_neutral_~_8wekyb3d8bbwe.xml

                      • Path C:\ProgramData\{D0B46527-7C45-A967-1A4D-5BBD0FF57755}\Microsoft.Getstarted_8.2.22942.0_neutral_~_8wekyb3d8bbwe.xml
                      • Size 26KB
                      • SHA256 70d4896e97e5a6e63d081deb667a746d8153c30ef2556c15fac003e4ac3ea4e9
                      • MD5 SHA1 SHA512 SSDEEP

                      Microsoft.ScreenSketch_10.1907.2471.0_neutral_split.scale-125_8wekyb3d8bbwe.xml

                      • Path C:\ProgramData\{D0B46527-7C45-A967-1A4D-5BBD0FF57755}\Microsoft.ScreenSketch_10.1907.2471.0_neutral_split.scale-125_8wekyb3d8bbwe.xml
                      • Size 839B
                      • SHA256 d1e768a7bb7a5851697a2a5bec63670c9d90b72d1f77169ef231c265b9cb8272
                      • MD5 SHA1 SHA512

                      Peqquspi.tmp

                      • Path C:\ProgramData\{D0B46527-7C45-A967-1A4D-5BBD0FF57755}\Peqquspi.tmp
                      • Size 3.5MB
                      • SHA256 077ae43a680eb2f4f80e414b2a3e019385d4b5eb613665020c8dfc98cb79d46e
                      • MD5 SHA1 SHA512 SSDEEP

                      user-192.png

                      • Path C:\ProgramData\{D0B46527-7C45-A967-1A4D-5BBD0FF57755}\user-192.png
                      • Size 2KB
                      • SHA256 7e9997f40d13b32c724ca4ecef283f377ce9965d31534167994e654d6e6623b6
                      • MD5 SHA1 SHA512

                      user.bmp

                      • Path C:\ProgramData\{D0B46527-7C45-A967-1A4D-5BBD0FF57755}\user.bmp
                      • Size 588KB
                      • SHA256 60ff5131dba68a8ffe7ba0475bf3e192b432e1969e5ac52d7f217f6935f4035d
                      • MD5 SHA1 SHA512 SSDEEP

                      utc.tracing.json

                      • Path C:\ProgramData\{D0B46527-7C45-A967-1A4D-5BBD0FF57755}\utc.tracing.json
                      • Size 41B
                      • SHA256 65961d7a83a876885a76d0afba18b9d4e516f784faea0fa8aa3cd800adec26ac
                      • MD5 SHA1 SHA512

                      C6B0.exe

                      • Path C:\Users\Admin\AppData\Local\Temp\C6B0.exe
                      • Size 1.1MB
                      • SHA256 b49d29722055d11c8411e35bea7871d5c3fb0faf60650354900d1f346afbdc06
                      • MD5 SHA1 SHA512 SSDEEP

                      C6B0.exe

                      • Path C:\Users\Admin\AppData\Local\Temp\C6B0.exe
                      • Size 1.1MB
                      • SHA256 b49d29722055d11c8411e35bea7871d5c3fb0faf60650354900d1f346afbdc06
                      • MD5 SHA1 SHA512 SSDEEP

                      Rruwtqrefy.tmp

                      • Path C:\Users\Admin\AppData\Local\Temp\Rruwtqrefy.tmp
                      • Size 805KB
                      • SHA256 c5cd7d52ba95127c18556a2ddca64e4ef80a2945e6579545c0067abdab3a0ad0
                      • MD5 SHA1 SHA512 SSDEEP

                      Rruwtqrefy.tmp

                      • Path C:\Users\Admin\AppData\Local\Temp\Rruwtqrefy.tmp
                      • Size 805KB
                      • SHA256 c5cd7d52ba95127c18556a2ddca64e4ef80a2945e6579545c0067abdab3a0ad0
                      • MD5 SHA1 SHA512 SSDEEP

                      rifutih

                      • Path C:\Users\Admin\AppData\Roaming\rifutih
                      • Size 283KB
                      • SHA256 7b61c03b9aed5f7b1ad41da03b3e0d7f1d54d5b445a003d4df4f9db850ecc7ad
                      • MD5 SHA1 SHA512 SSDEEP

                      rifutih

                      • Path C:\Users\Admin\AppData\Roaming\rifutih
                      • Size 283KB
                      • SHA256 7b61c03b9aed5f7b1ad41da03b3e0d7f1d54d5b445a003d4df4f9db850ecc7ad
                      • MD5 SHA1 SHA512 SSDEEP

                      reviewers.dll

                      • Path \??\c:\program files (x86)\windows nt\tabletextservice\reviewers.dll
                      • Size 805KB
                      • SHA256 7d62d26c947ddba4857648fa06789d8f45060e498beb6a995bb39058da538242
                      • MD5 SHA1 SHA512 SSDEEP

                      memory/1800-132-0x00000000007CE000-0x00000000007E3000-memory.dmp

                      memory/1800-135-0x0000000000400000-0x000000000044C000-memory.dmp

                      memory/1800-134-0x0000000000400000-0x000000000044C000-memory.dmp

                      memory/1800-133-0x00000000005D0000-0x00000000005D9000-memory.dmp

                      memory/1900-156-0x00000000006E0000-0x0000000000978000-memory.dmp

                      memory/1900-158-0x0000024A60B20000-0x0000024A60DC9000-memory.dmp

                      memory/1900-154-0x0000024A623E0000-0x0000024A62520000-memory.dmp

                      memory/1900-155-0x0000024A623E0000-0x0000024A62520000-memory.dmp

                      memory/1908-159-0x0000000004740000-0x000000000526F000-memory.dmp

                      memory/1908-148-0x00000000053F0000-0x0000000005530000-memory.dmp

                      memory/1908-145-0x0000000004740000-0x000000000526F000-memory.dmp

                      memory/1908-151-0x00000000053F0000-0x0000000005530000-memory.dmp

                      memory/1908-150-0x00000000053F0000-0x0000000005530000-memory.dmp

                      memory/1908-152-0x00000000053F0000-0x0000000005530000-memory.dmp

                      memory/1908-146-0x0000000004740000-0x000000000526F000-memory.dmp

                      memory/1908-147-0x00000000053F0000-0x0000000005530000-memory.dmp

                      memory/1908-149-0x00000000053F0000-0x0000000005530000-memory.dmp

                      memory/3940-165-0x0000000000400000-0x000000000044C000-memory.dmp

                      memory/3940-164-0x0000000000400000-0x000000000044C000-memory.dmp

                      memory/3940-163-0x000000000047D000-0x0000000000493000-memory.dmp

                      memory/4160-169-0x0000000003AE0000-0x000000000460F000-memory.dmp

                      memory/4160-179-0x0000000003AE0000-0x000000000460F000-memory.dmp

                      memory/4212-144-0x0000000000400000-0x0000000000525000-memory.dmp

                      memory/4212-143-0x00000000022F0000-0x0000000002414000-memory.dmp

                      memory/4212-142-0x0000000001FF4000-0x00000000020D8000-memory.dmp