Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29-12-2022 07:16

General

  • Target

    77fd1326d6d6e5ee9204229b87b37abb2c9a4edac91ac7dfb0c596540ec0ea69.exe

  • Size

    301KB

  • MD5

    db01217ca2c9943b3770de9f4c2ef5e1

  • SHA1

    0026acad260ad52ca2ffe9f57b26ad7661b2a1f4

  • SHA256

    77fd1326d6d6e5ee9204229b87b37abb2c9a4edac91ac7dfb0c596540ec0ea69

  • SHA512

    5caf9d151ff1bfa2975199ace8d8273aa11d1659ce888dd02256a56cea8345bbdbaa5448efb46a2607b0c243e5a3c42ddda9c77e6a7d6fc878cb8b7c5616fc3f

  • SSDEEP

    6144:YIUHhLM8EGyKpXyB9r9vPw7n1HbwZoV9J:2BA8fFXyB9rlw7

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 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 22 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\77fd1326d6d6e5ee9204229b87b37abb2c9a4edac91ac7dfb0c596540ec0ea69.exe
    "C:\Users\Admin\AppData\Local\Temp\77fd1326d6d6e5ee9204229b87b37abb2c9a4edac91ac7dfb0c596540ec0ea69.exe"
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    PID:3048
  • C:\Users\Admin\AppData\Local\Temp\C3C2.exe
    C:\Users\Admin\AppData\Local\Temp\C3C2.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:2876
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\system32\rundll32.exe" "C:\Users\Admin\AppData\Local\Temp\Qfyshwqueqdpai.tmp",Dioeeedresq
      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:4168
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 14026
        3⤵
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:3932
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /End /tn \Microsoft\Windows\Wininet\CacheTask
        3⤵
          PID:1264
        • C:\Windows\SysWOW64\schtasks.exe
          schtasks /Run /tn \Microsoft\Windows\Wininet\CacheTask
          3⤵
            PID:3528
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2876 -s 360
          2⤵
          • Program crash
          PID:1348
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 2876 -ip 2876
        1⤵
          PID:536
        • C:\Windows\System32\rundll32.exe
          C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
          1⤵
            PID:1448

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Users\Admin\AppData\Local\Temp\C3C2.exe

            Filesize

            1.0MB

            MD5

            931a0805deb806d5f4191b823ab00eee

            SHA1

            a2e749d97965a08df25d2a144ea018b6a746f53d

            SHA256

            1121156048231baeec6cdc4cc17f173384326a64e79a0bc5581e0feb75a77a94

            SHA512

            dc68e780086f08470018002d31fcd62408809c10b9b7206d9ed0668c18c7929a7dbd7b2849e730f9a0b9bf06b1a12043f4983045c4e7140dae9bf5e337e6cb69

          • C:\Users\Admin\AppData\Local\Temp\C3C2.exe

            Filesize

            1.0MB

            MD5

            931a0805deb806d5f4191b823ab00eee

            SHA1

            a2e749d97965a08df25d2a144ea018b6a746f53d

            SHA256

            1121156048231baeec6cdc4cc17f173384326a64e79a0bc5581e0feb75a77a94

            SHA512

            dc68e780086f08470018002d31fcd62408809c10b9b7206d9ed0668c18c7929a7dbd7b2849e730f9a0b9bf06b1a12043f4983045c4e7140dae9bf5e337e6cb69

          • C:\Users\Admin\AppData\Local\Temp\Qfyshwqueqdpai.tmp

            Filesize

            792KB

            MD5

            822d3ead416a1a85cb96e65f65cd5ae2

            SHA1

            af32b69e2835d1cacdadb97ae6dfafccc32d1837

            SHA256

            72bdb3a06dca8458ac9aedf06785b2d7b95a19f8b9f3f8f5be2eb4744e9c5d1d

            SHA512

            48d0d61efd51fd2d8eb04d990b4a5b3ca34c916199d3b0a3b135d2089e028ee37f5145e4705fb75da77eaabbe12f8c4ea55775a41e1b1c68a90ce68b8c2a7260

          • C:\Users\Admin\AppData\Local\Temp\Qfyshwqueqdpai.tmp

            Filesize

            792KB

            MD5

            822d3ead416a1a85cb96e65f65cd5ae2

            SHA1

            af32b69e2835d1cacdadb97ae6dfafccc32d1837

            SHA256

            72bdb3a06dca8458ac9aedf06785b2d7b95a19f8b9f3f8f5be2eb4744e9c5d1d

            SHA512

            48d0d61efd51fd2d8eb04d990b4a5b3ca34c916199d3b0a3b135d2089e028ee37f5145e4705fb75da77eaabbe12f8c4ea55775a41e1b1c68a90ce68b8c2a7260

          • memory/2876-142-0x0000000000B6D000-0x0000000000C43000-memory.dmp

            Filesize

            856KB

          • memory/2876-144-0x0000000000400000-0x0000000000514000-memory.dmp

            Filesize

            1.1MB

          • memory/2876-143-0x00000000023F0000-0x0000000002501000-memory.dmp

            Filesize

            1.1MB

          • memory/3048-134-0x0000000000400000-0x000000000044F000-memory.dmp

            Filesize

            316KB

          • memory/3048-135-0x0000000000400000-0x000000000044F000-memory.dmp

            Filesize

            316KB

          • memory/3048-132-0x0000000000677000-0x000000000068C000-memory.dmp

            Filesize

            84KB

          • memory/3048-133-0x00000000005A0000-0x00000000005A9000-memory.dmp

            Filesize

            36KB

          • memory/3932-157-0x00000238B0C70000-0x00000238B0F1E000-memory.dmp

            Filesize

            2.7MB

          • memory/3932-156-0x00000000009C0000-0x0000000000C5C000-memory.dmp

            Filesize

            2.6MB

          • memory/3932-154-0x00000238B26C0000-0x00000238B2800000-memory.dmp

            Filesize

            1.2MB

          • memory/3932-155-0x00000238B26C0000-0x00000238B2800000-memory.dmp

            Filesize

            1.2MB

          • memory/4168-152-0x0000000005080000-0x00000000051C0000-memory.dmp

            Filesize

            1.2MB

          • memory/4168-151-0x0000000005080000-0x00000000051C0000-memory.dmp

            Filesize

            1.2MB

          • memory/4168-150-0x0000000005080000-0x00000000051C0000-memory.dmp

            Filesize

            1.2MB

          • memory/4168-149-0x0000000005080000-0x00000000051C0000-memory.dmp

            Filesize

            1.2MB

          • memory/4168-148-0x0000000005080000-0x00000000051C0000-memory.dmp

            Filesize

            1.2MB

          • memory/4168-147-0x0000000005080000-0x00000000051C0000-memory.dmp

            Filesize

            1.2MB

          • memory/4168-146-0x0000000005690000-0x00000000061ED000-memory.dmp

            Filesize

            11.4MB

          • memory/4168-159-0x0000000005690000-0x00000000061ED000-memory.dmp

            Filesize

            11.4MB

          • memory/4168-145-0x0000000005690000-0x00000000061ED000-memory.dmp

            Filesize

            11.4MB