Analysis

  • max time kernel
    145s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    06-09-2024 16:42

General

  • Target

    8f6bbc692073146dfc23b5743a53d2abc158831b64964de5ec6a15cf573bf8d3.exe

  • Size

    213KB

  • MD5

    9ad5cb5878facd1f519325f68cb408a1

  • SHA1

    64450bf9e67e5001835661493053e6ce67cc42b5

  • SHA256

    8f6bbc692073146dfc23b5743a53d2abc158831b64964de5ec6a15cf573bf8d3

  • SHA512

    5a45b850989000c24a25ac27a4ca3480bfed933912e7add4834f5c443486240d60d9a56a5418ca43ac0888898072de72cb029dfb29105560192937d10a93b0bd

  • SSDEEP

    6144:1DDXnqPnz5vSel6TKC1onDZ/MU0Vdh1HQ:1XXq/z5vSNKC1onDSVdz

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 5 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8f6bbc692073146dfc23b5743a53d2abc158831b64964de5ec6a15cf573bf8d3.exe
    "C:\Users\Admin\AppData\Local\Temp\8f6bbc692073146dfc23b5743a53d2abc158831b64964de5ec6a15cf573bf8d3.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1796
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jddlgdhg\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1156
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pjjbeose.exe" C:\Windows\SysWOW64\jddlgdhg\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:748
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create jddlgdhg binPath= "C:\Windows\SysWOW64\jddlgdhg\pjjbeose.exe /d\"C:\Users\Admin\AppData\Local\Temp\8f6bbc692073146dfc23b5743a53d2abc158831b64964de5ec6a15cf573bf8d3.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2728
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description jddlgdhg "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2780
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start jddlgdhg
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2864
    • 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:2740
  • C:\Windows\SysWOW64\jddlgdhg\pjjbeose.exe
    C:\Windows\SysWOW64\jddlgdhg\pjjbeose.exe /d"C:\Users\Admin\AppData\Local\Temp\8f6bbc692073146dfc23b5743a53d2abc158831b64964de5ec6a15cf573bf8d3.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2672
    • 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:2708

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    14.1MB

    MD5

    f31fd5d5760365ec4ef8626d0fedd9e7

    SHA1

    0d7ebad62369476648678adf98cc10df40ee12d5

    SHA256

    4b11c7d6403ce084ed1e2c63841f2390b1253dcd7488971bd8b44aacdc6f67a1

    SHA512

    9308ac7bbdb9764a52df873b83ef8e39d15e747909837a2f16ac06a35039cca5bfa6f372bde10c2b3a07ff6d4d742cdeb376f83aa4dcb1580f8397d7d7405d0d

  • memory/1796-16-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/1796-2-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/1796-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/1796-1-0x00000000005A0000-0x00000000006A0000-memory.dmp

    Filesize

    1024KB

  • memory/1796-14-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/1796-15-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/2672-12-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/2708-50-0x0000000000170000-0x0000000000175000-memory.dmp

    Filesize

    20KB

  • memory/2708-43-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2708-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2708-17-0x00000000000D0000-0x00000000000E5000-memory.dmp

    Filesize

    84KB

  • memory/2708-18-0x00000000000D0000-0x00000000000E5000-memory.dmp

    Filesize

    84KB

  • memory/2708-27-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2708-24-0x0000000000080000-0x0000000000086000-memory.dmp

    Filesize

    24KB

  • memory/2708-20-0x0000000001D30000-0x0000000001F3F000-memory.dmp

    Filesize

    2.1MB

  • memory/2708-23-0x0000000001D30000-0x0000000001F3F000-memory.dmp

    Filesize

    2.1MB

  • memory/2708-41-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2708-11-0x00000000000D0000-0x00000000000E5000-memory.dmp

    Filesize

    84KB

  • memory/2708-47-0x0000000000170000-0x0000000000175000-memory.dmp

    Filesize

    20KB

  • memory/2708-46-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2708-45-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2708-44-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2708-8-0x00000000000D0000-0x00000000000E5000-memory.dmp

    Filesize

    84KB

  • memory/2708-40-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2708-39-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2708-38-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2708-37-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2708-36-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2708-35-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2708-34-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2708-33-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2708-42-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2708-31-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2708-32-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2708-30-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2708-54-0x00000000058C0000-0x0000000005CCB000-memory.dmp

    Filesize

    4.0MB

  • memory/2708-55-0x00000000001E0000-0x00000000001E7000-memory.dmp

    Filesize

    28KB

  • memory/2708-51-0x00000000058C0000-0x0000000005CCB000-memory.dmp

    Filesize

    4.0MB