Analysis

  • max time kernel
    149s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    04/09/2024, 16:10

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
  • Looks up external IP address via web service 1 IoCs

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

  • 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 7 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:1924
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vltsscrq\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2696
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\lolevxrh.exe" C:\Windows\SysWOW64\vltsscrq\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2296
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create vltsscrq binPath= "C:\Windows\SysWOW64\vltsscrq\lolevxrh.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:2580
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description vltsscrq "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1548
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start vltsscrq
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2052
    • 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:2480
  • C:\Windows\SysWOW64\vltsscrq\lolevxrh.exe
    C:\Windows\SysWOW64\vltsscrq\lolevxrh.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:2832
    • 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:2772

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    13.0MB

    MD5

    1c9481da59287319ee18de8a27841138

    SHA1

    243df6578883e9e77748b239375707bcc836260a

    SHA256

    7a4cbe97d1227ed57984cebcb4ae503b7859a27430c4daab91ee2804ec290285

    SHA512

    ccb71759d6274a9fede3c0c73ad1681b253478b5b1fd149f51640f772d8330c9cf8a89a8fa21a7e2a6557d3a71e98082cbc2c6d6b5f5a4d11f36ee33ace18328

  • memory/1924-16-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/1924-2-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/1924-4-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/1924-1-0x0000000000530000-0x0000000000630000-memory.dmp

    Filesize

    1024KB

  • memory/1924-15-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/1924-14-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/2772-47-0x0000000000300000-0x0000000000305000-memory.dmp

    Filesize

    20KB

  • memory/2772-50-0x0000000000300000-0x0000000000305000-memory.dmp

    Filesize

    20KB

  • memory/2772-8-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2772-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2772-17-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2772-18-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2772-20-0x0000000001920000-0x0000000001B2F000-memory.dmp

    Filesize

    2.1MB

  • memory/2772-27-0x00000000002F0000-0x0000000000300000-memory.dmp

    Filesize

    64KB

  • memory/2772-24-0x00000000002A0000-0x00000000002A6000-memory.dmp

    Filesize

    24KB

  • memory/2772-23-0x0000000001920000-0x0000000001B2F000-memory.dmp

    Filesize

    2.1MB

  • memory/2772-44-0x00000000002F0000-0x0000000000300000-memory.dmp

    Filesize

    64KB

  • memory/2772-11-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2772-54-0x0000000005570000-0x000000000597B000-memory.dmp

    Filesize

    4.0MB

  • memory/2772-55-0x0000000000310000-0x0000000000317000-memory.dmp

    Filesize

    28KB

  • memory/2772-51-0x0000000005570000-0x000000000597B000-memory.dmp

    Filesize

    4.0MB

  • memory/2772-30-0x00000000002F0000-0x0000000000300000-memory.dmp

    Filesize

    64KB

  • memory/2772-46-0x00000000002F0000-0x0000000000300000-memory.dmp

    Filesize

    64KB

  • memory/2772-45-0x00000000002F0000-0x0000000000300000-memory.dmp

    Filesize

    64KB

  • memory/2772-43-0x00000000002F0000-0x0000000000300000-memory.dmp

    Filesize

    64KB

  • memory/2772-42-0x00000000002F0000-0x0000000000300000-memory.dmp

    Filesize

    64KB

  • memory/2772-41-0x00000000002F0000-0x0000000000300000-memory.dmp

    Filesize

    64KB

  • memory/2772-40-0x00000000002F0000-0x0000000000300000-memory.dmp

    Filesize

    64KB

  • memory/2772-39-0x00000000002F0000-0x0000000000300000-memory.dmp

    Filesize

    64KB

  • memory/2772-38-0x00000000002F0000-0x0000000000300000-memory.dmp

    Filesize

    64KB

  • memory/2772-37-0x00000000002F0000-0x0000000000300000-memory.dmp

    Filesize

    64KB

  • memory/2772-36-0x00000000002F0000-0x0000000000300000-memory.dmp

    Filesize

    64KB

  • memory/2772-35-0x00000000002F0000-0x0000000000300000-memory.dmp

    Filesize

    64KB

  • memory/2772-34-0x00000000002F0000-0x0000000000300000-memory.dmp

    Filesize

    64KB

  • memory/2772-33-0x00000000002F0000-0x0000000000300000-memory.dmp

    Filesize

    64KB

  • memory/2772-32-0x00000000002F0000-0x0000000000300000-memory.dmp

    Filesize

    64KB

  • memory/2772-31-0x00000000002F0000-0x0000000000300000-memory.dmp

    Filesize

    64KB

  • memory/2832-13-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB