Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    28-03-2021 07:08

General

  • Target

    ed8abc9617438808e88ca91c8bfa8246.exe

  • Size

    162KB

  • MD5

    ed8abc9617438808e88ca91c8bfa8246

  • SHA1

    50888828af8422cdeb6bae51e39661fe9f6cb831

  • SHA256

    f8ad6ecb49e68ac7cf261551f01d8ef3348e347cf4239368a26bb2b3ec372904

  • SHA512

    d05fccb67316ece03a7522e5e39ebc45b7bcd84f44b281bf1fc34463295d4f821b11e1f5d3e3e9e92cf34f906dcc1c7f38aa21e3b4f07e2299eb7691ed7ae86d

Malware Config

Extracted

Family

smokeloader

Version

2020

C2

http://xsss99.icu/upload/

http://bingooodsg.icu/upload/

http://junntd.xyz/upload/

http://ginessa11.xyz/upload/

http://overplayninsx.xyz/upload/

http://bananinze.com/upload/

http://daunimlas.com/upload/

rc4.i32
rc4.i32

Signatures

  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Taurus Stealer

    Taurus is an infostealer first seen in June 2020.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Creates new service(s) 1 TTPs
  • Executes dropped EXE 6 IoCs
  • Deletes itself 1 IoCs
  • Loads dropped DLL 13 IoCs
  • Modifies file permissions 1 TTPs 1 IoCs
  • Reads local data of messenger clients 2 TTPs

    Infostealers often target stored data of messaging applications, which can include saved credentials and account information.

  • 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.

  • Launches sc.exe

    Sc.exe is a Windows utlilty to control services on the system.

  • 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 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of FindShellTrayWindow 4 IoCs
  • Suspicious use of SendNotifyMessage 4 IoCs
  • Suspicious use of WriteProcessMemory 47 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ed8abc9617438808e88ca91c8bfa8246.exe
    "C:\Users\Admin\AppData\Local\Temp\ed8abc9617438808e88ca91c8bfa8246.exe"
    1⤵
    • Loads dropped DLL
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    PID:1740
  • C:\Users\Admin\AppData\Local\Temp\6A5.exe
    C:\Users\Admin\AppData\Local\Temp\6A5.exe
    1⤵
    • Executes dropped EXE
    • Loads dropped DLL
    • Adds Run key to start application
    • Modifies system certificate store
    • Suspicious use of WriteProcessMemory
    PID:332
    • C:\Windows\SysWOW64\icacls.exe
      icacls "C:\Users\Admin\AppData\Local\5a12f61e-ab72-432c-82a9-ca97acd7b28b" /deny *S-1-1-0:(OI)(CI)(DE,DC)
      2⤵
      • Modifies file permissions
      PID:1792
    • C:\Users\Admin\AppData\Local\Temp\6A5.exe
      "C:\Users\Admin\AppData\Local\Temp\6A5.exe" --Admin IsNotAutoStart IsNotTask
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Modifies system certificate store
      • Suspicious use of WriteProcessMemory
      PID:1348
      • C:\Users\Admin\AppData\Local\a8b65bdb-c77d-43d2-ac1e-48f030e90546\updatewin.exe
        "C:\Users\Admin\AppData\Local\a8b65bdb-c77d-43d2-ac1e-48f030e90546\updatewin.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        PID:1712
      • C:\Users\Admin\AppData\Local\a8b65bdb-c77d-43d2-ac1e-48f030e90546\5.exe
        "C:\Users\Admin\AppData\Local\a8b65bdb-c77d-43d2-ac1e-48f030e90546\5.exe"
        3⤵
        • Executes dropped EXE
        PID:1784
  • C:\Users\Admin\AppData\Local\Temp\1259.exe
    C:\Users\Admin\AppData\Local\Temp\1259.exe
    1⤵
    • Executes dropped EXE
    • Loads dropped DLL
    • Checks processor information in registry
    • Modifies system certificate store
    • Suspicious use of WriteProcessMemory
    PID:1900
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im 1259.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\1259.exe" & del C:\ProgramData\*.dll & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1172
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /im 1259.exe /f
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:1708
      • C:\Windows\SysWOW64\timeout.exe
        timeout /t 6
        3⤵
        • Delays execution with timeout.exe
        PID:1572
  • C:\Users\Admin\AppData\Local\Temp\22BF.exe
    C:\Users\Admin\AppData\Local\Temp\22BF.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:1344
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ygnruktl\
      2⤵
        PID:1616
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\obnkdqvf.exe" C:\Windows\SysWOW64\ygnruktl\
        2⤵
          PID:872
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ygnruktl binPath= "C:\Windows\SysWOW64\ygnruktl\obnkdqvf.exe /d\"C:\Users\Admin\AppData\Local\Temp\22BF.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:272

        Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • memory/332-10-0x0000000001A20000-0x0000000001A31000-memory.dmp

          Filesize

          68KB

        • memory/332-13-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/332-12-0x0000000001800000-0x000000000191A000-memory.dmp

          Filesize

          1.1MB

        • memory/1216-16-0x000007FEF6290000-0x000007FEF650A000-memory.dmp

          Filesize

          2.5MB

        • memory/1268-7-0x0000000002B20000-0x0000000002B36000-memory.dmp

          Filesize

          88KB

        • memory/1344-64-0x0000000000400000-0x0000000000415000-memory.dmp

          Filesize

          84KB

        • memory/1344-59-0x0000000001F80000-0x0000000001F91000-memory.dmp

          Filesize

          68KB

        • memory/1344-63-0x00000000003B0000-0x00000000003C3000-memory.dmp

          Filesize

          76KB

        • memory/1348-46-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1348-36-0x0000000001AC0000-0x0000000001AD1000-memory.dmp

          Filesize

          68KB

        • memory/1740-2-0x0000000002180000-0x0000000002191000-memory.dmp

          Filesize

          68KB

        • memory/1740-6-0x0000000000400000-0x0000000000409000-memory.dmp

          Filesize

          36KB

        • memory/1740-5-0x0000000000220000-0x0000000000229000-memory.dmp

          Filesize

          36KB

        • memory/1740-3-0x00000000766F1000-0x00000000766F3000-memory.dmp

          Filesize

          8KB

        • memory/1784-72-0x0000000002EE0000-0x0000000002EF1000-memory.dmp

          Filesize

          68KB

        • memory/1900-17-0x0000000002150000-0x0000000002161000-memory.dmp

          Filesize

          68KB

        • memory/1900-18-0x0000000000220000-0x00000000002B5000-memory.dmp

          Filesize

          596KB

        • memory/1900-24-0x0000000000400000-0x0000000000498000-memory.dmp

          Filesize

          608KB