Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20240729-en
  • resource tags

    arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
  • submitted
    07/09/2024, 01:22

General

  • Target

    6b880d602f77fc4061a3f6b0a7619e9a8899d9e61eeeea4460eec1d900aeb66f.exe

  • Size

    214KB

  • MD5

    8b9be712ba5f26a1f6369833d52193fb

  • SHA1

    187b0a0888114923e4f611ed90402d7bf0e21733

  • SHA256

    6b880d602f77fc4061a3f6b0a7619e9a8899d9e61eeeea4460eec1d900aeb66f

  • SHA512

    33c457fab7b2910452de37d2a263d46b2391bb4b34b0c37793b6f5875180e92cb2caebfb2ab08e72393b0230407505c94eef6b41040c1500b2b4393fb3b58d08

  • SSDEEP

    3072:YASCGfSRnbJBJ0IQALHFv0raVXyPg9a+lfB0pyTbQ:0fSRnbJBJTLlr04C6

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\6b880d602f77fc4061a3f6b0a7619e9a8899d9e61eeeea4460eec1d900aeb66f.exe
    "C:\Users\Admin\AppData\Local\Temp\6b880d602f77fc4061a3f6b0a7619e9a8899d9e61eeeea4460eec1d900aeb66f.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2284
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lgtmihzk\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2384
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\xjrouhnl.exe" C:\Windows\SysWOW64\lgtmihzk\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2464
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create lgtmihzk binPath= "C:\Windows\SysWOW64\lgtmihzk\xjrouhnl.exe /d\"C:\Users\Admin\AppData\Local\Temp\6b880d602f77fc4061a3f6b0a7619e9a8899d9e61eeeea4460eec1d900aeb66f.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2812
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description lgtmihzk "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2824
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start lgtmihzk
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2780
    • 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:2808
  • C:\Windows\SysWOW64\lgtmihzk\xjrouhnl.exe
    C:\Windows\SysWOW64\lgtmihzk\xjrouhnl.exe /d"C:\Users\Admin\AppData\Local\Temp\6b880d602f77fc4061a3f6b0a7619e9a8899d9e61eeeea4460eec1d900aeb66f.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2760
    • 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:2788

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    13.1MB

    MD5

    e5075afbe3cf028c8ac58d44128e8d7c

    SHA1

    dd8512457f4bf1e1324d423824d1165823926272

    SHA256

    dfb1278b8490f0c8de57c3e52da00020aaa5c8c18761daec02873dfea7b24949

    SHA512

    2dbc11f99074c63dfd1c95dbcc07f39a5a6711faead63296b9cebcd1641478d5cecc200241a85b8ca1af6d859fef7b6956fdf90b946fab718280bf100cec55e3

  • memory/2284-15-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/2284-2-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/2284-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2284-1-0x00000000008A0000-0x00000000009A0000-memory.dmp

    Filesize

    1024KB

  • memory/2284-16-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2284-14-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/2760-12-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/2788-50-0x00000000002B0000-0x00000000002B5000-memory.dmp

    Filesize

    20KB

  • memory/2788-42-0x0000000000220000-0x0000000000230000-memory.dmp

    Filesize

    64KB

  • memory/2788-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2788-17-0x0000000000110000-0x0000000000125000-memory.dmp

    Filesize

    84KB

  • memory/2788-18-0x0000000000110000-0x0000000000125000-memory.dmp

    Filesize

    84KB

  • memory/2788-27-0x0000000000220000-0x0000000000230000-memory.dmp

    Filesize

    64KB

  • memory/2788-20-0x0000000001C30000-0x0000000001E3F000-memory.dmp

    Filesize

    2.1MB

  • memory/2788-24-0x0000000000080000-0x0000000000086000-memory.dmp

    Filesize

    24KB

  • memory/2788-23-0x0000000001C30000-0x0000000001E3F000-memory.dmp

    Filesize

    2.1MB

  • memory/2788-46-0x0000000000220000-0x0000000000230000-memory.dmp

    Filesize

    64KB

  • memory/2788-11-0x0000000000110000-0x0000000000125000-memory.dmp

    Filesize

    84KB

  • memory/2788-47-0x00000000002B0000-0x00000000002B5000-memory.dmp

    Filesize

    20KB

  • memory/2788-45-0x0000000000220000-0x0000000000230000-memory.dmp

    Filesize

    64KB

  • memory/2788-44-0x0000000000220000-0x0000000000230000-memory.dmp

    Filesize

    64KB

  • memory/2788-43-0x0000000000220000-0x0000000000230000-memory.dmp

    Filesize

    64KB

  • memory/2788-8-0x0000000000110000-0x0000000000125000-memory.dmp

    Filesize

    84KB

  • memory/2788-41-0x0000000000220000-0x0000000000230000-memory.dmp

    Filesize

    64KB

  • memory/2788-40-0x0000000000220000-0x0000000000230000-memory.dmp

    Filesize

    64KB

  • memory/2788-39-0x0000000000220000-0x0000000000230000-memory.dmp

    Filesize

    64KB

  • memory/2788-38-0x0000000000220000-0x0000000000230000-memory.dmp

    Filesize

    64KB

  • memory/2788-37-0x0000000000220000-0x0000000000230000-memory.dmp

    Filesize

    64KB

  • memory/2788-36-0x0000000000220000-0x0000000000230000-memory.dmp

    Filesize

    64KB

  • memory/2788-35-0x0000000000220000-0x0000000000230000-memory.dmp

    Filesize

    64KB

  • memory/2788-34-0x0000000000220000-0x0000000000230000-memory.dmp

    Filesize

    64KB

  • memory/2788-33-0x0000000000220000-0x0000000000230000-memory.dmp

    Filesize

    64KB

  • memory/2788-32-0x0000000000220000-0x0000000000230000-memory.dmp

    Filesize

    64KB

  • memory/2788-31-0x0000000000220000-0x0000000000230000-memory.dmp

    Filesize

    64KB

  • memory/2788-30-0x0000000000220000-0x0000000000230000-memory.dmp

    Filesize

    64KB

  • memory/2788-51-0x00000000057F0000-0x0000000005BFB000-memory.dmp

    Filesize

    4.0MB

  • memory/2788-54-0x00000000057F0000-0x0000000005BFB000-memory.dmp

    Filesize

    4.0MB

  • memory/2788-55-0x00000000007D0000-0x00000000007D7000-memory.dmp

    Filesize

    28KB