Analysis

  • max time kernel
    150s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06-09-2024 14:17

General

  • Target

    c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe

  • Size

    213KB

  • MD5

    8e456f932787fcd0cadbb598174575b2

  • SHA1

    22b069c76b86bdb6be8cdafc78019b55c583062e

  • SHA256

    c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5

  • SHA512

    cb26a33dacdcfe804bdd587ecd44b9bf1c59f357e8701fc4f5e1b04d8d8882466c7743fac51969fe8912e1197a5653986eb4a71edc35eee89051b6c98d546c9d

  • SSDEEP

    6144:MGDLD6Tj3Vyg0mwiRjaVlodEFjvn/Mq0Vdh1HQ:M+L2n3VygtzRWJjv+Vdz

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.

  • 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 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe
    "C:\Users\Admin\AppData\Local\Temp\c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5048
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qhplibfi\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3420
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nzlqntsg.exe" C:\Windows\SysWOW64\qhplibfi\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1548
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create qhplibfi binPath= "C:\Windows\SysWOW64\qhplibfi\nzlqntsg.exe /d\"C:\Users\Admin\AppData\Local\Temp\c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1164
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description qhplibfi "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2356
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start qhplibfi
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3696
    • 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:3908
  • C:\Windows\SysWOW64\qhplibfi\nzlqntsg.exe
    C:\Windows\SysWOW64\qhplibfi\nzlqntsg.exe /d"C:\Users\Admin\AppData\Local\Temp\c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3296
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Drops file in System32 directory
      • System Location Discovery: System Language Discovery
      • Modifies data under HKEY_USERS
      PID:4688

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    13.9MB

    MD5

    376276a599123e9755209d2b27ab5611

    SHA1

    4ea2e4643bcac3e789735d458d9ad93f4f9da2f4

    SHA256

    e971f576c4bc0372c9be082d302fe53a51c9817bb888a5a38b939b4aacf4a004

    SHA512

    395989988b9a79c0da22deba030461e3d0cd0db212a84abfd916ca78cfcb8e4c3e2fc4ac306ae52c5a24d1ad357067d680c90b191813ea0c115f7306be3ed1b6

  • memory/3296-9-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/3296-16-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/3296-11-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/4688-39-0x0000000001F90000-0x0000000001FA0000-memory.dmp

    Filesize

    64KB

  • memory/4688-40-0x0000000001F90000-0x0000000001FA0000-memory.dmp

    Filesize

    64KB

  • memory/4688-49-0x0000000001F90000-0x0000000001FA0000-memory.dmp

    Filesize

    64KB

  • memory/4688-48-0x0000000001F90000-0x0000000001FA0000-memory.dmp

    Filesize

    64KB

  • memory/4688-12-0x00000000009D0000-0x00000000009E5000-memory.dmp

    Filesize

    84KB

  • memory/4688-23-0x0000000002800000-0x0000000002A0F000-memory.dmp

    Filesize

    2.1MB

  • memory/4688-27-0x0000000001F80000-0x0000000001F86000-memory.dmp

    Filesize

    24KB

  • memory/4688-30-0x0000000001F90000-0x0000000001FA0000-memory.dmp

    Filesize

    64KB

  • memory/4688-17-0x00000000009D0000-0x00000000009E5000-memory.dmp

    Filesize

    84KB

  • memory/4688-18-0x00000000009D0000-0x00000000009E5000-memory.dmp

    Filesize

    84KB

  • memory/4688-58-0x0000000001FF0000-0x0000000001FF7000-memory.dmp

    Filesize

    28KB

  • memory/4688-26-0x0000000002800000-0x0000000002A0F000-memory.dmp

    Filesize

    2.1MB

  • memory/4688-57-0x0000000007800000-0x0000000007C0B000-memory.dmp

    Filesize

    4.0MB

  • memory/4688-54-0x0000000007800000-0x0000000007C0B000-memory.dmp

    Filesize

    4.0MB

  • memory/4688-53-0x0000000001FE0000-0x0000000001FE5000-memory.dmp

    Filesize

    20KB

  • memory/4688-50-0x0000000001FE0000-0x0000000001FE5000-memory.dmp

    Filesize

    20KB

  • memory/4688-33-0x0000000001F90000-0x0000000001FA0000-memory.dmp

    Filesize

    64KB

  • memory/4688-34-0x0000000001F90000-0x0000000001FA0000-memory.dmp

    Filesize

    64KB

  • memory/4688-35-0x0000000001F90000-0x0000000001FA0000-memory.dmp

    Filesize

    64KB

  • memory/4688-46-0x0000000001F90000-0x0000000001FA0000-memory.dmp

    Filesize

    64KB

  • memory/4688-45-0x0000000001F90000-0x0000000001FA0000-memory.dmp

    Filesize

    64KB

  • memory/4688-44-0x0000000001F90000-0x0000000001FA0000-memory.dmp

    Filesize

    64KB

  • memory/4688-43-0x0000000001F90000-0x0000000001FA0000-memory.dmp

    Filesize

    64KB

  • memory/4688-42-0x0000000001F90000-0x0000000001FA0000-memory.dmp

    Filesize

    64KB

  • memory/4688-41-0x0000000001F90000-0x0000000001FA0000-memory.dmp

    Filesize

    64KB

  • memory/4688-47-0x0000000001F90000-0x0000000001FA0000-memory.dmp

    Filesize

    64KB

  • memory/4688-36-0x0000000001F90000-0x0000000001FA0000-memory.dmp

    Filesize

    64KB

  • memory/4688-38-0x0000000001F90000-0x0000000001FA0000-memory.dmp

    Filesize

    64KB

  • memory/4688-37-0x0000000001F90000-0x0000000001FA0000-memory.dmp

    Filesize

    64KB

  • memory/5048-1-0x00000000006D0000-0x00000000007D0000-memory.dmp

    Filesize

    1024KB

  • memory/5048-8-0x00000000006D0000-0x00000000007D0000-memory.dmp

    Filesize

    1024KB

  • memory/5048-10-0x0000000002180000-0x0000000002193000-memory.dmp

    Filesize

    76KB

  • memory/5048-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/5048-2-0x0000000002180000-0x0000000002193000-memory.dmp

    Filesize

    76KB

  • memory/5048-15-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/5048-14-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB