Analysis

  • max time kernel
    140s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    17-09-2024 10:37

General

  • Target

    amoeqhwt.exe

  • Size

    11.4MB

  • MD5

    ae72e9f1f7a1fdf37a9864edd5a1b0d7

  • SHA1

    bd20ac8ebfb5eef418868fb0905a0bcf2aef73c0

  • SHA256

    80179046df92d795c3ab0655f61a3c24387dcb628f00e7b64871c446cdf65cd7

  • SHA512

    db3f33dc248f9aa3cd7ba7cde1a564491f60368043b9832410e73ac17b51d271bb5fb9c4b64819b5537578e9c9ecfe46b6dd438777072814cf238fe635b77294

  • SSDEEP

    12288:GtfqkWH3ZIQqcggggggggggggggggggggggggggggggggggggggggggggggggggI:GY1HpLq

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

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\amoeqhwt.exe
    "C:\Users\Admin\AppData\Local\Temp\amoeqhwt.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1924
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lkxxdkkf\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2052
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\yozdpxdm.exe" C:\Windows\SysWOW64\lkxxdkkf\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2520
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create lkxxdkkf binPath= "C:\Windows\SysWOW64\lkxxdkkf\yozdpxdm.exe /d\"C:\Users\Admin\AppData\Local\Temp\amoeqhwt.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3016
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description lkxxdkkf "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2136
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start lkxxdkkf
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2960
    • 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:2788
  • C:\Windows\SysWOW64\lkxxdkkf\yozdpxdm.exe
    C:\Windows\SysWOW64\lkxxdkkf\yozdpxdm.exe /d"C:\Users\Admin\AppData\Local\Temp\amoeqhwt.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2400
    • 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:2704

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    13.1MB

    MD5

    8403c17de3dd4da312e9526363c00f30

    SHA1

    5b1f2ce3a9cd15ad02ec17459fa32b18a5b22224

    SHA256

    b9c87e1ef2dc7d0e9aa6066266b6dab4bcb9985ba6d7a86d7324fdeabc702adb

    SHA512

    69b4f95f83cd0b4b1cb487480b9d41b3ff178ecba3fccab40f80f23bd435e198753e399b7abd96ff996230683cf6eb712bd1a92aff389066caca412cf9a8b8fa

  • memory/1924-1-0x0000000002D10000-0x0000000002E10000-memory.dmp

    Filesize

    1024KB

  • memory/1924-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/1924-2-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/1924-14-0x0000000000400000-0x0000000002C6C000-memory.dmp

    Filesize

    40.4MB

  • memory/1924-15-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/1924-17-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/1924-16-0x0000000002D10000-0x0000000002E10000-memory.dmp

    Filesize

    1024KB

  • memory/2400-13-0x0000000000400000-0x0000000002C6C000-memory.dmp

    Filesize

    40.4MB

  • memory/2704-33-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2704-48-0x00000000000C0000-0x00000000000C5000-memory.dmp

    Filesize

    20KB

  • memory/2704-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2704-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2704-19-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2704-21-0x0000000001D50000-0x0000000001F5F000-memory.dmp

    Filesize

    2.1MB

  • memory/2704-28-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2704-25-0x00000000000A0000-0x00000000000A6000-memory.dmp

    Filesize

    24KB

  • memory/2704-24-0x0000000001D50000-0x0000000001F5F000-memory.dmp

    Filesize

    2.1MB

  • memory/2704-31-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2704-32-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2704-8-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2704-38-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2704-51-0x00000000000C0000-0x00000000000C5000-memory.dmp

    Filesize

    20KB

  • memory/2704-52-0x0000000005840000-0x0000000005C4B000-memory.dmp

    Filesize

    4.0MB

  • memory/2704-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2704-56-0x00000000000D0000-0x00000000000D7000-memory.dmp

    Filesize

    28KB

  • memory/2704-55-0x0000000005840000-0x0000000005C4B000-memory.dmp

    Filesize

    4.0MB

  • memory/2704-47-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2704-46-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2704-45-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2704-44-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2704-43-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2704-42-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2704-41-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2704-40-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2704-39-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2704-37-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2704-36-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2704-35-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2704-34-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB