Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    08/09/2024, 02:37

General

  • Target

    569edae4e4c7f5df590c7ee0a96210942e2be22be73beda9bc1528addca234f4.exe

  • Size

    399KB

  • MD5

    f7ae445081e10267d2cec9b6b0e2d375

  • SHA1

    e12892ea4d092e4b959617c6d00356ee23da0797

  • SHA256

    569edae4e4c7f5df590c7ee0a96210942e2be22be73beda9bc1528addca234f4

  • SHA512

    194a260edb0ce0d6c9b74484b55d64e8d593c990ca647acf4c24dd4b58abee0e586485fb06970557d83cc97159933b55a9fa3cc9316f52c28d86552aa039ab04

  • SSDEEP

    6144:ztRdHbfGeyTf8CJH1ci6aZRVDqQP4n48rMI8gVzuhZIIQFa0lw:ztRdHbfByTU3OTBtP44cMYW

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\569edae4e4c7f5df590c7ee0a96210942e2be22be73beda9bc1528addca234f4.exe
    "C:\Users\Admin\AppData\Local\Temp\569edae4e4c7f5df590c7ee0a96210942e2be22be73beda9bc1528addca234f4.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2092
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jscsqavf\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2344
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\shzgljog.exe" C:\Windows\SysWOW64\jscsqavf\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2544
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create jscsqavf binPath= "C:\Windows\SysWOW64\jscsqavf\shzgljog.exe /d\"C:\Users\Admin\AppData\Local\Temp\569edae4e4c7f5df590c7ee0a96210942e2be22be73beda9bc1528addca234f4.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2580
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description jscsqavf "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1960
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start jscsqavf
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2768
    • 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:2836
  • C:\Windows\SysWOW64\jscsqavf\shzgljog.exe
    C:\Windows\SysWOW64\jscsqavf\shzgljog.exe /d"C:\Users\Admin\AppData\Local\Temp\569edae4e4c7f5df590c7ee0a96210942e2be22be73beda9bc1528addca234f4.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2908
    • 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:2776

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    14.3MB

    MD5

    a61d983f4548233a568c2d304d8f224c

    SHA1

    8b98b5001a424b523c3fa339fd1e8f5590167908

    SHA256

    407c3c2b5c5cf62cb605f7fd21ecc03ac531a345548a11eace32e31f4108cad7

    SHA512

    46de5f713682be076e6362d75ee6bee7628757d744895e71b11d2187668390e9858cf394c9a465c3166f7d2b95e8f9ef64bbb33bb2e527a4aad27a9e20fad66b

  • memory/2092-16-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2092-2-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/2092-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2092-1-0x0000000002650000-0x0000000002750000-memory.dmp

    Filesize

    1024KB

  • memory/2092-14-0x0000000000400000-0x000000000247C000-memory.dmp

    Filesize

    32.5MB

  • memory/2092-15-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/2776-42-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

  • memory/2776-50-0x0000000000180000-0x0000000000185000-memory.dmp

    Filesize

    20KB

  • memory/2776-30-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

  • memory/2776-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2776-17-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2776-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2776-20-0x00000000019A0000-0x0000000001BAF000-memory.dmp

    Filesize

    2.1MB

  • memory/2776-27-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

  • memory/2776-24-0x0000000000160000-0x0000000000166000-memory.dmp

    Filesize

    24KB

  • memory/2776-23-0x00000000019A0000-0x0000000001BAF000-memory.dmp

    Filesize

    2.1MB

  • memory/2776-43-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

  • memory/2776-40-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

  • memory/2776-55-0x0000000000250000-0x0000000000257000-memory.dmp

    Filesize

    28KB

  • memory/2776-54-0x0000000005680000-0x0000000005A8B000-memory.dmp

    Filesize

    4.0MB

  • memory/2776-51-0x0000000005680000-0x0000000005A8B000-memory.dmp

    Filesize

    4.0MB

  • memory/2776-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2776-47-0x0000000000180000-0x0000000000185000-memory.dmp

    Filesize

    20KB

  • memory/2776-46-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

  • memory/2776-45-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

  • memory/2776-44-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

  • memory/2776-8-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2776-41-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

  • memory/2776-39-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

  • memory/2776-38-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

  • memory/2776-37-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

  • memory/2776-36-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

  • memory/2776-35-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

  • memory/2776-34-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

  • memory/2776-33-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

  • memory/2776-32-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

  • memory/2776-31-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

  • memory/2908-13-0x0000000000400000-0x000000000247C000-memory.dmp

    Filesize

    32.5MB