Analysis

  • max time kernel
    142s
  • max time network
    144s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    10-09-2024 10:10

General

  • Target

    9622f580ee393bcb238cbbcdbf4752acac3ea2f538139352845952a4dea884f1.exe

  • Size

    228KB

  • MD5

    1a09089eb2bf1f7ac14b32335533b7af

  • SHA1

    7e08605a4e6d4b4ac6c5ec20ff5eba2884dd1db8

  • SHA256

    9622f580ee393bcb238cbbcdbf4752acac3ea2f538139352845952a4dea884f1

  • SHA512

    6202be3984d1dfd356f89921b4a62b2e91d7139627fe0da4e60f878e7fd17f6b35bd5e118464b25f0e4de4dd545825dbcbbcf24401853645d51665b37eaf9da3

  • SSDEEP

    3072:lN67vpI29VaPzK76NcNXLvoaedUE7nuQTdzZ/p43s64ctjm4f:lN67vpIKVozf0XLuuQTdJ2Nd

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.

  • Creates new service(s) 2 TTPs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\9622f580ee393bcb238cbbcdbf4752acac3ea2f538139352845952a4dea884f1.exe
    "C:\Users\Admin\AppData\Local\Temp\9622f580ee393bcb238cbbcdbf4752acac3ea2f538139352845952a4dea884f1.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1512
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jggmqqdz\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1504
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vhpmsflj.exe" C:\Windows\SysWOW64\jggmqqdz\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3788
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create jggmqqdz binPath= "C:\Windows\SysWOW64\jggmqqdz\vhpmsflj.exe /d\"C:\Users\Admin\AppData\Local\Temp\9622f580ee393bcb238cbbcdbf4752acac3ea2f538139352845952a4dea884f1.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:536
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description jggmqqdz "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4640
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start jggmqqdz
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3220
    • 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:2400
  • C:\Windows\SysWOW64\jggmqqdz\vhpmsflj.exe
    C:\Windows\SysWOW64\jggmqqdz\vhpmsflj.exe /d"C:\Users\Admin\AppData\Local\Temp\9622f580ee393bcb238cbbcdbf4752acac3ea2f538139352845952a4dea884f1.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1544
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • 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:4020

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    13.8MB

    MD5

    9e728b332a031e4a933c1bd8a90665e9

    SHA1

    cdb22f616f0c99f7181551b82fe9d7cb971f1b59

    SHA256

    ae2b37eb74486716a26be1ec41ac2fe57576e810857a592d62a570d60c31a68b

    SHA512

    795193a0de22e80d8620328432ead4c8d0f0b040b75a0ad9fe276eac11520e52eba5273ebd840edfc512ff91026fba66085e9f5bedb791b2430d35b37c2986e6

  • memory/1512-2-0x0000000002D20000-0x0000000002D33000-memory.dmp

    Filesize

    76KB

  • memory/1512-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/1512-8-0x0000000002D20000-0x0000000002D33000-memory.dmp

    Filesize

    76KB

  • memory/1512-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/1512-7-0x0000000000400000-0x0000000002B59000-memory.dmp

    Filesize

    39.3MB

  • memory/1512-1-0x0000000002BC0000-0x0000000002CC0000-memory.dmp

    Filesize

    1024KB

  • memory/1544-12-0x0000000000400000-0x0000000002B59000-memory.dmp

    Filesize

    39.3MB

  • memory/4020-41-0x0000000000DF0000-0x0000000000E00000-memory.dmp

    Filesize

    64KB

  • memory/4020-36-0x0000000000DF0000-0x0000000000E00000-memory.dmp

    Filesize

    64KB

  • memory/4020-14-0x00000000008E0000-0x00000000008F5000-memory.dmp

    Filesize

    84KB

  • memory/4020-31-0x0000000000DF0000-0x0000000000E00000-memory.dmp

    Filesize

    64KB

  • memory/4020-52-0x0000000002BE0000-0x0000000002BE7000-memory.dmp

    Filesize

    28KB

  • memory/4020-48-0x0000000007600000-0x0000000007A0B000-memory.dmp

    Filesize

    4.0MB

  • memory/4020-47-0x0000000002BD0000-0x0000000002BD5000-memory.dmp

    Filesize

    20KB

  • memory/4020-44-0x0000000002BD0000-0x0000000002BD5000-memory.dmp

    Filesize

    20KB

  • memory/4020-43-0x0000000000DF0000-0x0000000000E00000-memory.dmp

    Filesize

    64KB

  • memory/4020-42-0x0000000000DF0000-0x0000000000E00000-memory.dmp

    Filesize

    64KB

  • memory/4020-11-0x00000000008E0000-0x00000000008F5000-memory.dmp

    Filesize

    84KB

  • memory/4020-40-0x0000000000DF0000-0x0000000000E00000-memory.dmp

    Filesize

    64KB

  • memory/4020-39-0x0000000000DF0000-0x0000000000E00000-memory.dmp

    Filesize

    64KB

  • memory/4020-38-0x0000000000DF0000-0x0000000000E00000-memory.dmp

    Filesize

    64KB

  • memory/4020-37-0x0000000000DF0000-0x0000000000E00000-memory.dmp

    Filesize

    64KB

  • memory/4020-15-0x00000000008E0000-0x00000000008F5000-memory.dmp

    Filesize

    84KB

  • memory/4020-35-0x0000000000DF0000-0x0000000000E00000-memory.dmp

    Filesize

    64KB

  • memory/4020-34-0x0000000000DF0000-0x0000000000E00000-memory.dmp

    Filesize

    64KB

  • memory/4020-33-0x0000000000DF0000-0x0000000000E00000-memory.dmp

    Filesize

    64KB

  • memory/4020-32-0x0000000000DF0000-0x0000000000E00000-memory.dmp

    Filesize

    64KB

  • memory/4020-30-0x0000000000DF0000-0x0000000000E00000-memory.dmp

    Filesize

    64KB

  • memory/4020-28-0x0000000000DF0000-0x0000000000E00000-memory.dmp

    Filesize

    64KB

  • memory/4020-27-0x0000000000DF0000-0x0000000000E00000-memory.dmp

    Filesize

    64KB

  • memory/4020-24-0x0000000000DF0000-0x0000000000E00000-memory.dmp

    Filesize

    64KB

  • memory/4020-20-0x0000000002600000-0x000000000280F000-memory.dmp

    Filesize

    2.1MB

  • memory/4020-51-0x0000000007600000-0x0000000007A0B000-memory.dmp

    Filesize

    4.0MB

  • memory/4020-29-0x0000000000DF0000-0x0000000000E00000-memory.dmp

    Filesize

    64KB

  • memory/4020-17-0x0000000002600000-0x000000000280F000-memory.dmp

    Filesize

    2.1MB

  • memory/4020-21-0x0000000000C70000-0x0000000000C76000-memory.dmp

    Filesize

    24KB