Analysis

  • max time kernel
    150s
  • max time network
    145s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    10-03-2021 09:58

General

  • Target

    5ed271e10ba37319d01d44acd33489a7.exe

  • Size

    284KB

  • MD5

    5ed271e10ba37319d01d44acd33489a7

  • SHA1

    7130a850b50d5fccc1401f57ad95cac863a02062

  • SHA256

    178fb69c394a6d86a3695acbb025bc2f3be31dea683ee6e5016af0566eef8111

  • SHA512

    882d1adf9f2513d5578a72dcc50f0ef510def30c2c1ed0af5f051752e299a72be79c48660038aa852a39007c8286c6ea2ba2886cf0d8e4a859573faedf1ca27f

Malware Config

Extracted

Family

smokeloader

Version

2020

C2

http://jibw.top/

http://lakf.top/

http://yapv.top/

http://pqdb.top/

http://bpqx.top/

http://gyuw.top/

http://vafc.top/

http://qgam.top/

http://viio.top/

http://chpp.top/

http://csji.top/

http://xxql.top/

http://vtxa.top/

http://ggoz.top/

http://crpa.top/

http://vuss.top/

http://coal.top/

http://fymm.top/

http://roaf.top/

http://aeus.top/

rc4.i32
rc4.i32

Signatures

  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Executes dropped EXE 3 IoCs
  • Deletes itself 1 IoCs
  • Loads dropped DLL 9 IoCs
  • Modifies file permissions 1 TTPs 1 IoCs
  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses 2FA software files, possible credential harvesting 2 TTPs
  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Looks up external IP address via web service 3 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • 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 2 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Kills process with taskkill 1 IoCs
  • Modifies system certificate store 2 TTPs 7 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of FindShellTrayWindow 4 IoCs
  • Suspicious use of SendNotifyMessage 4 IoCs
  • Suspicious use of WriteProcessMemory 33 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\5ed271e10ba37319d01d44acd33489a7.exe
    "C:\Users\Admin\AppData\Local\Temp\5ed271e10ba37319d01d44acd33489a7.exe"
    1⤵
    • Loads dropped DLL
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    PID:292
  • C:\Users\Admin\AppData\Local\Temp\9953.exe
    C:\Users\Admin\AppData\Local\Temp\9953.exe
    1⤵
    • Executes dropped EXE
    • Loads dropped DLL
    • Adds Run key to start application
    • Modifies system certificate store
    • Suspicious use of WriteProcessMemory
    PID:396
    • C:\Windows\SysWOW64\icacls.exe
      icacls "C:\Users\Admin\AppData\Local\7919b2d9-45b7-444b-afb4-60650d8b0cf9" /deny *S-1-1-0:(OI)(CI)(DE,DC)
      2⤵
      • Modifies file permissions
      PID:1672
    • C:\Users\Admin\AppData\Local\Temp\9953.exe
      "C:\Users\Admin\AppData\Local\Temp\9953.exe" --Admin IsNotAutoStart IsNotTask
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Modifies system certificate store
      • Suspicious use of WriteProcessMemory
      PID:1604
      • C:\Users\Admin\AppData\Local\bbd6d0cb-d1a1-42b8-a1dd-296855db84a4\5.exe
        "C:\Users\Admin\AppData\Local\bbd6d0cb-d1a1-42b8-a1dd-296855db84a4\5.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Checks processor information in registry
        • Modifies system certificate store
        • Suspicious use of WriteProcessMemory
        PID:2004
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c taskkill /im 5.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\bbd6d0cb-d1a1-42b8-a1dd-296855db84a4\5.exe" & del C:\ProgramData\*.dll & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:840
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im 5.exe /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:1064
          • C:\Windows\SysWOW64\timeout.exe
            timeout /t 6
            5⤵
            • Delays execution with timeout.exe
            PID:1692
  • C:\Windows\SysWOW64\explorer.exe
    C:\Windows\SysWOW64\explorer.exe
    1⤵
      PID:268

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/268-14-0x0000000000080000-0x000000000008B000-memory.dmp

      Filesize

      44KB

    • memory/268-13-0x0000000000090000-0x0000000000098000-memory.dmp

      Filesize

      32KB

    • memory/268-12-0x0000000075541000-0x0000000075543000-memory.dmp

      Filesize

      8KB

    • memory/292-6-0x0000000000400000-0x000000000040A000-memory.dmp

      Filesize

      40KB

    • memory/292-5-0x0000000000020000-0x000000000002A000-memory.dmp

      Filesize

      40KB

    • memory/292-3-0x0000000076861000-0x0000000076863000-memory.dmp

      Filesize

      8KB

    • memory/292-2-0x0000000000A40000-0x0000000000A51000-memory.dmp

      Filesize

      68KB

    • memory/396-17-0x0000000002DA0000-0x0000000002EBA000-memory.dmp

      Filesize

      1.1MB

    • memory/396-18-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/396-15-0x0000000002DA0000-0x0000000002DB1000-memory.dmp

      Filesize

      68KB

    • memory/1104-19-0x000007FEF6B80000-0x000007FEF6DFA000-memory.dmp

      Filesize

      2.5MB

    • memory/1268-7-0x0000000002980000-0x0000000002996000-memory.dmp

      Filesize

      88KB

    • memory/1604-32-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1604-27-0x0000000002E70000-0x0000000002E81000-memory.dmp

      Filesize

      68KB