Analysis

  • max time kernel
    142s
  • max time network
    155s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    05-09-2024 01:47

General

  • Target

    b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe

  • Size

    11.6MB

  • MD5

    fed6d9f141d4ac6b3388a2c90722bd62

  • SHA1

    3480f699c94d4a520c8d92dfd2f6c84d5bd9668b

  • SHA256

    b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf

  • SHA512

    f678216084e177bc51879d697f6e4201449874ed1c6f4c41fc1cb62aecf8ed5c3ab17784c1d30c481ee99c727fe0a29cd2854bdcaf554b3da425d59b5e957719

  • SSDEEP

    6144:rc6OZDisWsD0Td2HJxO+m8PuG1R4WnWjrsaz:r1OZDisvwdaxO0PuG1R4CWs

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\b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe
    "C:\Users\Admin\AppData\Local\Temp\b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2056
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\cezdgwdb\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2476
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\svozzijj.exe" C:\Windows\SysWOW64\cezdgwdb\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2432
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create cezdgwdb binPath= "C:\Windows\SysWOW64\cezdgwdb\svozzijj.exe /d\"C:\Users\Admin\AppData\Local\Temp\b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2896
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description cezdgwdb "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2644
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start cezdgwdb
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2128
    • 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:2884
  • C:\Windows\SysWOW64\cezdgwdb\svozzijj.exe
    C:\Windows\SysWOW64\cezdgwdb\svozzijj.exe /d"C:\Users\Admin\AppData\Local\Temp\b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2824
    • 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:1752

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    13.5MB

    MD5

    9318d550099d807c196dc927e847f4df

    SHA1

    770a608a8453f1c9441b55d8c98d4b7cbd04915d

    SHA256

    b2e02564387488648a79bc4719487169c06f89b00e469e26a2cf99175c35ed8b

    SHA512

    a14e5ea1c855467c07a12a5aaee74102883f9a50c03e525592531c62cd7e4bc5424c16f5b66a45cb1c833ade2b4f321b6865337f16151253c471e5c2aeea4b92

  • memory/1752-39-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/1752-46-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/1752-45-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/1752-38-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/1752-37-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/1752-16-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/1752-14-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/1752-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/1752-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/1752-47-0x0000000000270000-0x0000000000275000-memory.dmp

    Filesize

    20KB

  • memory/1752-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/1752-34-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/1752-44-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/1752-43-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/1752-42-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/1752-41-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/1752-40-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/1752-50-0x0000000000270000-0x0000000000275000-memory.dmp

    Filesize

    20KB

  • memory/1752-51-0x0000000005490000-0x000000000589B000-memory.dmp

    Filesize

    4.0MB

  • memory/1752-54-0x0000000005490000-0x000000000589B000-memory.dmp

    Filesize

    4.0MB

  • memory/1752-35-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/1752-36-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/1752-33-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/1752-32-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/1752-31-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/1752-30-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/1752-27-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/1752-24-0x00000000000A0000-0x00000000000A6000-memory.dmp

    Filesize

    24KB

  • memory/1752-23-0x00000000019C0000-0x0000000001BCF000-memory.dmp

    Filesize

    2.1MB

  • memory/1752-20-0x00000000019C0000-0x0000000001BCF000-memory.dmp

    Filesize

    2.1MB

  • memory/1752-55-0x0000000000280000-0x0000000000287000-memory.dmp

    Filesize

    28KB

  • memory/2056-4-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

  • memory/2056-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2056-2-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2056-8-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

  • memory/2056-1-0x00000000007B0000-0x00000000008B0000-memory.dmp

    Filesize

    1024KB

  • memory/2824-17-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB