Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20240705-en
  • resource tags

    arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
  • submitted
    27/07/2024, 15:04

General

  • Target

    a5f35b4f8933e0106c7743eaadbd3b883f61552add7ff17aca237450b3aa4168.exe

  • Size

    268KB

  • MD5

    6c2830c79d0a840f479ad635e3d57883

  • SHA1

    dc4073381a79705a4df53048cad7b44679623835

  • SHA256

    a5f35b4f8933e0106c7743eaadbd3b883f61552add7ff17aca237450b3aa4168

  • SHA512

    0a17899c829495dddf3d08a832c7e2b4747ab9665089a9d6b8d5bb625e4851e885800cb242241740853f9e5ad30449f710edd231865c49d464a7aa3084aedc91

  • SSDEEP

    3072:66kSFokrBF+7cvxpl1oZkNYe/v4IMbGhULweRQvybL2RxTTu:jzfrK+Dl1ou2HtmaLgxTT

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

  • Windows security bypass 2 TTPs 1 IoCs
  • Creates new service(s) 2 TTPs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops file in System32 directory 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Launches sc.exe 3 IoCs

    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).

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

  • System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies data under HKEY_USERS 6 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a5f35b4f8933e0106c7743eaadbd3b883f61552add7ff17aca237450b3aa4168.exe
    "C:\Users\Admin\AppData\Local\Temp\a5f35b4f8933e0106c7743eaadbd3b883f61552add7ff17aca237450b3aa4168.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1736
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\dabmjdc\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1744
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\seqvsyxl.exe" C:\Windows\SysWOW64\dabmjdc\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2432
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create dabmjdc binPath= "C:\Windows\SysWOW64\dabmjdc\seqvsyxl.exe /d\"C:\Users\Admin\AppData\Local\Temp\a5f35b4f8933e0106c7743eaadbd3b883f61552add7ff17aca237450b3aa4168.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:352
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description dabmjdc "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2344
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start dabmjdc
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2320
    • C:\Windows\SysWOW64\netsh.exe
      "C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
      2⤵
      • Modifies Windows Firewall
      • Event Triggered Execution: Netsh Helper DLL
      • System Location Discovery: System Language Discovery
      PID:3000
  • C:\Windows\SysWOW64\dabmjdc\seqvsyxl.exe
    C:\Windows\SysWOW64\dabmjdc\seqvsyxl.exe /d"C:\Users\Admin\AppData\Local\Temp\a5f35b4f8933e0106c7743eaadbd3b883f61552add7ff17aca237450b3aa4168.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2140
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Windows security bypass
      • Sets service image path in registry
      • Deletes itself
      • Drops file in System32 directory
      • System Location Discovery: System Language Discovery
      • Modifies data under HKEY_USERS
      PID:2648

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          10.3MB

          MD5

          b689e82ff21769a4e9a79212625c4ccf

          SHA1

          2da3797c906450856d452f5b857858bc9593553d

          SHA256

          b034d2e26eb1b7c54028c518c64ea02707b67e515c99ccb32dfde74f4aaf68b3

          SHA512

          6f402c526f0a6561977e2d47fc6cb760cbb2cda5278664caa27d992a9404f081b663d616fea3c924a640bab0af4d20e829fe237401c253173664800baa7e4dba

        • memory/1736-2-0x0000000000220000-0x0000000000233000-memory.dmp

          Filesize

          76KB

        • memory/1736-1-0x0000000002610000-0x0000000002710000-memory.dmp

          Filesize

          1024KB

        • memory/1736-9-0x0000000000400000-0x0000000000415000-memory.dmp

          Filesize

          84KB

        • memory/1736-8-0x0000000000400000-0x000000000245B000-memory.dmp

          Filesize

          32.4MB

        • memory/1736-3-0x0000000000400000-0x0000000000415000-memory.dmp

          Filesize

          84KB

        • memory/2140-16-0x0000000000400000-0x000000000245B000-memory.dmp

          Filesize

          32.4MB

        • memory/2648-46-0x0000000000130000-0x0000000000135000-memory.dmp

          Filesize

          20KB

        • memory/2648-42-0x0000000000120000-0x0000000000130000-memory.dmp

          Filesize

          64KB

        • memory/2648-10-0x0000000000080000-0x0000000000095000-memory.dmp

          Filesize

          84KB

        • memory/2648-17-0x0000000000080000-0x0000000000095000-memory.dmp

          Filesize

          84KB

        • memory/2648-13-0x0000000000080000-0x0000000000095000-memory.dmp

          Filesize

          84KB

        • memory/2648-19-0x0000000001A20000-0x0000000001C2F000-memory.dmp

          Filesize

          2.1MB

        • memory/2648-22-0x0000000001A20000-0x0000000001C2F000-memory.dmp

          Filesize

          2.1MB

        • memory/2648-54-0x0000000000180000-0x0000000000187000-memory.dmp

          Filesize

          28KB

        • memory/2648-53-0x0000000005660000-0x0000000005A6B000-memory.dmp

          Filesize

          4.0MB

        • memory/2648-50-0x0000000005660000-0x0000000005A6B000-memory.dmp

          Filesize

          4.0MB

        • memory/2648-49-0x0000000000130000-0x0000000000135000-memory.dmp

          Filesize

          20KB

        • memory/2648-15-0x0000000000080000-0x0000000000095000-memory.dmp

          Filesize

          84KB

        • memory/2648-45-0x0000000000120000-0x0000000000130000-memory.dmp

          Filesize

          64KB

        • memory/2648-44-0x0000000000120000-0x0000000000130000-memory.dmp

          Filesize

          64KB

        • memory/2648-43-0x0000000000120000-0x0000000000130000-memory.dmp

          Filesize

          64KB

        • memory/2648-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

          Filesize

          4KB

        • memory/2648-41-0x0000000000120000-0x0000000000130000-memory.dmp

          Filesize

          64KB

        • memory/2648-40-0x0000000000120000-0x0000000000130000-memory.dmp

          Filesize

          64KB

        • memory/2648-39-0x0000000000120000-0x0000000000130000-memory.dmp

          Filesize

          64KB

        • memory/2648-38-0x0000000000120000-0x0000000000130000-memory.dmp

          Filesize

          64KB

        • memory/2648-37-0x0000000000120000-0x0000000000130000-memory.dmp

          Filesize

          64KB

        • memory/2648-36-0x0000000000120000-0x0000000000130000-memory.dmp

          Filesize

          64KB

        • memory/2648-35-0x0000000000120000-0x0000000000130000-memory.dmp

          Filesize

          64KB

        • memory/2648-34-0x0000000000120000-0x0000000000130000-memory.dmp

          Filesize

          64KB

        • memory/2648-33-0x0000000000120000-0x0000000000130000-memory.dmp

          Filesize

          64KB

        • memory/2648-32-0x0000000000120000-0x0000000000130000-memory.dmp

          Filesize

          64KB

        • memory/2648-31-0x0000000000120000-0x0000000000130000-memory.dmp

          Filesize

          64KB

        • memory/2648-30-0x0000000000120000-0x0000000000130000-memory.dmp

          Filesize

          64KB

        • memory/2648-29-0x0000000000120000-0x0000000000130000-memory.dmp

          Filesize

          64KB

        • memory/2648-26-0x0000000000120000-0x0000000000130000-memory.dmp

          Filesize

          64KB

        • memory/2648-23-0x0000000000110000-0x0000000000116000-memory.dmp

          Filesize

          24KB