Analysis

  • max time kernel
    145s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    05-09-2024 01:34

General

  • Target

    2cccbfbe95b716e6f8b5ed1634b9ae4e6ab87e1355804ca5aea8d353673ff6a2.exe

  • Size

    423KB

  • MD5

    b2e864c2f8f6e243822a5c133bb41061

  • SHA1

    5571df4cdc5b65cdc315c95ee52344dda7f12b20

  • SHA256

    2cccbfbe95b716e6f8b5ed1634b9ae4e6ab87e1355804ca5aea8d353673ff6a2

  • SHA512

    32a6087702abe92daab3e2c194b07006f5b9d3cdf48c692d23775f0d75e2941882920767148564ac7fedc417beadb1ae75734f240d07bec30eb262ae4f534e73

  • SSDEEP

    6144:qc6OZDisWsD0Td2HJxO+m8PuG1R4WnWjrsaz:q1OZDisvwdaxO0PuG1R4CWs

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 7 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2cccbfbe95b716e6f8b5ed1634b9ae4e6ab87e1355804ca5aea8d353673ff6a2.exe
    "C:\Users\Admin\AppData\Local\Temp\2cccbfbe95b716e6f8b5ed1634b9ae4e6ab87e1355804ca5aea8d353673ff6a2.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:548
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\sromfvcj\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2040
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ipsnmgga.exe" C:\Windows\SysWOW64\sromfvcj\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2224
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create sromfvcj binPath= "C:\Windows\SysWOW64\sromfvcj\ipsnmgga.exe /d\"C:\Users\Admin\AppData\Local\Temp\2cccbfbe95b716e6f8b5ed1634b9ae4e6ab87e1355804ca5aea8d353673ff6a2.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2836
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description sromfvcj "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2740
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start sromfvcj
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2920
    • 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:2852
  • C:\Windows\SysWOW64\sromfvcj\ipsnmgga.exe
    C:\Windows\SysWOW64\sromfvcj\ipsnmgga.exe /d"C:\Users\Admin\AppData\Local\Temp\2cccbfbe95b716e6f8b5ed1634b9ae4e6ab87e1355804ca5aea8d353673ff6a2.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2656
    • 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:2816

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    11.6MB

    MD5

    fed6d9f141d4ac6b3388a2c90722bd62

    SHA1

    3480f699c94d4a520c8d92dfd2f6c84d5bd9668b

    SHA256

    b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf

    SHA512

    f678216084e177bc51879d697f6e4201449874ed1c6f4c41fc1cb62aecf8ed5c3ab17784c1d30c481ee99c727fe0a29cd2854bdcaf554b3da425d59b5e957719

  • memory/548-15-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/548-2-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/548-4-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/548-1-0x0000000000750000-0x0000000000850000-memory.dmp

    Filesize

    1024KB

  • memory/548-16-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/548-14-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

  • memory/2656-12-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

  • memory/2816-27-0x0000000000470000-0x0000000000480000-memory.dmp

    Filesize

    64KB

  • memory/2816-38-0x0000000000470000-0x0000000000480000-memory.dmp

    Filesize

    64KB

  • memory/2816-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2816-17-0x0000000000100000-0x0000000000115000-memory.dmp

    Filesize

    84KB

  • memory/2816-18-0x0000000000100000-0x0000000000115000-memory.dmp

    Filesize

    84KB

  • memory/2816-23-0x0000000001860000-0x0000000001A6F000-memory.dmp

    Filesize

    2.1MB

  • memory/2816-24-0x00000000001D0000-0x00000000001D6000-memory.dmp

    Filesize

    24KB

  • memory/2816-31-0x0000000000470000-0x0000000000480000-memory.dmp

    Filesize

    64KB

  • memory/2816-30-0x0000000000470000-0x0000000000480000-memory.dmp

    Filesize

    64KB

  • memory/2816-20-0x0000000001860000-0x0000000001A6F000-memory.dmp

    Filesize

    2.1MB

  • memory/2816-11-0x0000000000100000-0x0000000000115000-memory.dmp

    Filesize

    84KB

  • memory/2816-32-0x0000000000470000-0x0000000000480000-memory.dmp

    Filesize

    64KB

  • memory/2816-33-0x0000000000470000-0x0000000000480000-memory.dmp

    Filesize

    64KB

  • memory/2816-34-0x0000000000470000-0x0000000000480000-memory.dmp

    Filesize

    64KB

  • memory/2816-36-0x0000000000470000-0x0000000000480000-memory.dmp

    Filesize

    64KB

  • memory/2816-8-0x0000000000100000-0x0000000000115000-memory.dmp

    Filesize

    84KB

  • memory/2816-37-0x0000000000470000-0x0000000000480000-memory.dmp

    Filesize

    64KB

  • memory/2816-35-0x0000000000470000-0x0000000000480000-memory.dmp

    Filesize

    64KB

  • memory/2816-54-0x00000000054D0000-0x00000000058DB000-memory.dmp

    Filesize

    4.0MB

  • memory/2816-45-0x0000000000470000-0x0000000000480000-memory.dmp

    Filesize

    64KB

  • memory/2816-51-0x00000000054D0000-0x00000000058DB000-memory.dmp

    Filesize

    4.0MB

  • memory/2816-55-0x00000000005C0000-0x00000000005C7000-memory.dmp

    Filesize

    28KB

  • memory/2816-50-0x00000000004C0000-0x00000000004C5000-memory.dmp

    Filesize

    20KB

  • memory/2816-47-0x00000000004C0000-0x00000000004C5000-memory.dmp

    Filesize

    20KB

  • memory/2816-46-0x0000000000470000-0x0000000000480000-memory.dmp

    Filesize

    64KB

  • memory/2816-44-0x0000000000470000-0x0000000000480000-memory.dmp

    Filesize

    64KB

  • memory/2816-43-0x0000000000470000-0x0000000000480000-memory.dmp

    Filesize

    64KB

  • memory/2816-42-0x0000000000470000-0x0000000000480000-memory.dmp

    Filesize

    64KB

  • memory/2816-41-0x0000000000470000-0x0000000000480000-memory.dmp

    Filesize

    64KB

  • memory/2816-40-0x0000000000470000-0x0000000000480000-memory.dmp

    Filesize

    64KB

  • memory/2816-39-0x0000000000470000-0x0000000000480000-memory.dmp

    Filesize

    64KB