Analysis

  • max time kernel
    117s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    05-10-2024 17:48

General

  • Target

    e01f2cb49081fb01eb0af6a7369d5b678b677f2e9811817ba7bbd854cb24b539N.exe

  • Size

    249KB

  • MD5

    35d94a64c3beb2bd39080b05fc763f70

  • SHA1

    5f08d3f5d0998b6eb80dd986b8efe628a5c58e19

  • SHA256

    e01f2cb49081fb01eb0af6a7369d5b678b677f2e9811817ba7bbd854cb24b539

  • SHA512

    5803cabffde0c2c62b94ce88d7243422badfc680522816d41e81b57ede4973132a3d3802b90e7dd379375409dd57d1232e796b541240819ade75b3ae2d39e2a4

  • SSDEEP

    3072:2GGHLMg57JJiSWbWkyYhnNh/RE/GtymuQ2fgu5NlssAxaxWT6Uf7J:RGHLMwlEBDxZY/Wmel

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\e01f2cb49081fb01eb0af6a7369d5b678b677f2e9811817ba7bbd854cb24b539N.exe
    "C:\Users\Admin\AppData\Local\Temp\e01f2cb49081fb01eb0af6a7369d5b678b677f2e9811817ba7bbd854cb24b539N.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1708
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ptsjpcaf\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2652
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\mcczlxnl.exe" C:\Windows\SysWOW64\ptsjpcaf\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2056
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create ptsjpcaf binPath= "C:\Windows\SysWOW64\ptsjpcaf\mcczlxnl.exe /d\"C:\Users\Admin\AppData\Local\Temp\e01f2cb49081fb01eb0af6a7369d5b678b677f2e9811817ba7bbd854cb24b539N.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2892
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description ptsjpcaf "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:352
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start ptsjpcaf
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2724
    • 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\ptsjpcaf\mcczlxnl.exe
    C:\Windows\SysWOW64\ptsjpcaf\mcczlxnl.exe /d"C:\Users\Admin\AppData\Local\Temp\e01f2cb49081fb01eb0af6a7369d5b678b677f2e9811817ba7bbd854cb24b539N.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:1488

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    12.9MB

    MD5

    74e37281cb76238dc29495694373cc12

    SHA1

    ed2d851b9485cc91d9b03b792d39d5e56dfeac90

    SHA256

    2bd58d9cf2f16769e2034ab1e2488d7fa26ebddfa9df18fa40dea08be9caf86f

    SHA512

    7e5434f8a0fb7b65177bca92e1ed119de7c78d191729a2b75acb01114388545831f16dd0455506dafb9c88e9fa8c369fbcb1aff0550c702f66b4bbb7fcb83652

  • memory/1488-31-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/1488-34-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/1488-33-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/1488-54-0x0000000005630000-0x0000000005A3B000-memory.dmp

    Filesize

    4.0MB

  • memory/1488-44-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/1488-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/1488-14-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/1488-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/1488-17-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/1488-35-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/1488-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/1488-23-0x00000000019B0000-0x0000000001BBF000-memory.dmp

    Filesize

    2.1MB

  • memory/1488-24-0x0000000000150000-0x0000000000156000-memory.dmp

    Filesize

    24KB

  • memory/1488-27-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/1488-20-0x00000000019B0000-0x0000000001BBF000-memory.dmp

    Filesize

    2.1MB

  • memory/1488-32-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/1488-30-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/1488-36-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/1488-37-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/1488-38-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/1488-55-0x0000000000250000-0x0000000000257000-memory.dmp

    Filesize

    28KB

  • memory/1488-51-0x0000000005630000-0x0000000005A3B000-memory.dmp

    Filesize

    4.0MB

  • memory/1488-50-0x0000000000180000-0x0000000000185000-memory.dmp

    Filesize

    20KB

  • memory/1488-47-0x0000000000180000-0x0000000000185000-memory.dmp

    Filesize

    20KB

  • memory/1488-46-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/1488-45-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/1488-43-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/1488-42-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/1488-41-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/1488-40-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/1488-39-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/1708-4-0x0000000000400000-0x000000000053A000-memory.dmp

    Filesize

    1.2MB

  • memory/1708-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/1708-1-0x0000000000680000-0x0000000000780000-memory.dmp

    Filesize

    1024KB

  • memory/1708-8-0x0000000000400000-0x000000000053A000-memory.dmp

    Filesize

    1.2MB

  • memory/1708-2-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2832-16-0x0000000000400000-0x000000000053A000-memory.dmp

    Filesize

    1.2MB