Analysis

  • max time kernel
    148s
  • max time network
    154s
  • platform
    windows10-1703_x64
  • resource
    win10-20240404-en
  • resource tags

    arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
  • submitted
    03-09-2024 16:58

General

  • Target

    knkduwqg.exe

  • Size

    11.8MB

  • MD5

    b32f61c5c47e9473cf4a0ac98e8143c1

  • SHA1

    d6de6d48a87510f4ba641785e56311a4732dcf26

  • SHA256

    2d49ab2f33264eb29d38ab91a7c6dc193a6a0fa65260b0295b1123c18612d7c5

  • SHA512

    cc0cc0499616d0277920597b7beb8ee0b53d99c9e8d8c827c6e2244dc9a98785a848f17368f6991d362f9b6f76cd3a1f7ebcc31e99c34097c458872336ab5c21

  • SSDEEP

    6144:9c6OZDisWsD0Td2HJxO+m8PuG1R4WnWjrsaz:91OZDisvwdaxO0PuG1R4CWs

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 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\knkduwqg.exe
    "C:\Users\Admin\AppData\Local\Temp\knkduwqg.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4920
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\owfzvsyd\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3920
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\lxjolrqe.exe" C:\Windows\SysWOW64\owfzvsyd\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1196
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create owfzvsyd binPath= "C:\Windows\SysWOW64\owfzvsyd\lxjolrqe.exe /d\"C:\Users\Admin\AppData\Local\Temp\knkduwqg.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3608
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description owfzvsyd "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1856
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start owfzvsyd
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3468
    • 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:3612
  • C:\Windows\SysWOW64\owfzvsyd\lxjolrqe.exe
    C:\Windows\SysWOW64\owfzvsyd\lxjolrqe.exe /d"C:\Users\Admin\AppData\Local\Temp\knkduwqg.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2176
    • 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:3720

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    14.3MB

    MD5

    d19edfdbe6e81c6454ecaa6df7a1e845

    SHA1

    915d20201444229490b2ee52a23d22a5b1b15af8

    SHA256

    0be1e96f5e5b732c588430dae05ab4236053120393d462594908bd4924d1ae9c

    SHA512

    e611fa84b5a024302904624e17498d932a0032be27ceddf4f78e119d5613fdb8645c871cc12b65efd9dbb13a9d72a14ae1c091360caafdb20317a25f7c10a566

  • memory/2176-12-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

  • memory/3720-42-0x0000000002FE0000-0x0000000002FF0000-memory.dmp

    Filesize

    64KB

  • memory/3720-31-0x0000000002FE0000-0x0000000002FF0000-memory.dmp

    Filesize

    64KB

  • memory/3720-53-0x0000000008F50000-0x000000000935B000-memory.dmp

    Filesize

    4.0MB

  • memory/3720-40-0x0000000002FE0000-0x0000000002FF0000-memory.dmp

    Filesize

    64KB

  • memory/3720-26-0x0000000002FE0000-0x0000000002FF0000-memory.dmp

    Filesize

    64KB

  • memory/3720-39-0x0000000002FE0000-0x0000000002FF0000-memory.dmp

    Filesize

    64KB

  • memory/3720-19-0x0000000004850000-0x0000000004A5F000-memory.dmp

    Filesize

    2.1MB

  • memory/3720-16-0x0000000002CB0000-0x0000000002CC5000-memory.dmp

    Filesize

    84KB

  • memory/3720-17-0x0000000002CB0000-0x0000000002CC5000-memory.dmp

    Filesize

    84KB

  • memory/3720-49-0x0000000003620000-0x0000000003625000-memory.dmp

    Filesize

    20KB

  • memory/3720-54-0x00000000036C0000-0x00000000036C7000-memory.dmp

    Filesize

    28KB

  • memory/3720-50-0x0000000008F50000-0x000000000935B000-memory.dmp

    Filesize

    4.0MB

  • memory/3720-46-0x0000000003620000-0x0000000003625000-memory.dmp

    Filesize

    20KB

  • memory/3720-45-0x0000000002FE0000-0x0000000002FF0000-memory.dmp

    Filesize

    64KB

  • memory/3720-44-0x0000000002FE0000-0x0000000002FF0000-memory.dmp

    Filesize

    64KB

  • memory/3720-43-0x0000000002FE0000-0x0000000002FF0000-memory.dmp

    Filesize

    64KB

  • memory/3720-23-0x0000000002FD0000-0x0000000002FD6000-memory.dmp

    Filesize

    24KB

  • memory/3720-34-0x0000000002FE0000-0x0000000002FF0000-memory.dmp

    Filesize

    64KB

  • memory/3720-11-0x0000000002CB0000-0x0000000002CC5000-memory.dmp

    Filesize

    84KB

  • memory/3720-38-0x0000000002FE0000-0x0000000002FF0000-memory.dmp

    Filesize

    64KB

  • memory/3720-37-0x0000000002FE0000-0x0000000002FF0000-memory.dmp

    Filesize

    64KB

  • memory/3720-36-0x0000000002FE0000-0x0000000002FF0000-memory.dmp

    Filesize

    64KB

  • memory/3720-35-0x0000000002FE0000-0x0000000002FF0000-memory.dmp

    Filesize

    64KB

  • memory/3720-33-0x0000000002FE0000-0x0000000002FF0000-memory.dmp

    Filesize

    64KB

  • memory/3720-32-0x0000000002FE0000-0x0000000002FF0000-memory.dmp

    Filesize

    64KB

  • memory/3720-41-0x0000000002FE0000-0x0000000002FF0000-memory.dmp

    Filesize

    64KB

  • memory/3720-30-0x0000000002FE0000-0x0000000002FF0000-memory.dmp

    Filesize

    64KB

  • memory/3720-29-0x0000000002FE0000-0x0000000002FF0000-memory.dmp

    Filesize

    64KB

  • memory/3720-22-0x0000000004850000-0x0000000004A5F000-memory.dmp

    Filesize

    2.1MB

  • memory/4920-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/4920-8-0x0000000000940000-0x0000000000953000-memory.dmp

    Filesize

    76KB

  • memory/4920-2-0x0000000000940000-0x0000000000953000-memory.dmp

    Filesize

    76KB

  • memory/4920-7-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

  • memory/4920-1-0x00000000009E0000-0x0000000000AE0000-memory.dmp

    Filesize

    1024KB

  • memory/4920-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB