Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-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.

  • 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 7 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\amoeqhwt.exe
    "C:\Users\Admin\AppData\Local\Temp\amoeqhwt.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4384
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\gzvrhlsa\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1932
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\icsvnicx.exe" C:\Windows\SysWOW64\gzvrhlsa\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2748
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create gzvrhlsa binPath= "C:\Windows\SysWOW64\gzvrhlsa\icsvnicx.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:4088
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description gzvrhlsa "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4464
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start gzvrhlsa
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:436
    • 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:5100
  • C:\Windows\SysWOW64\gzvrhlsa\icsvnicx.exe
    C:\Windows\SysWOW64\gzvrhlsa\icsvnicx.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:3240
    • 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:2256

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    10.6MB

    MD5

    37fd9fe23225ba3bc1edc772a59eac27

    SHA1

    876c5e1b8b88af54e7fb80390dfe8159ceece8ef

    SHA256

    2d3c1a89fb0e15c4d102803527f84cccfd98b8943d242ef80551f4807df2ed1a

    SHA512

    d86859f53a31832382daa3a2d2d7bc46301c0a22d89d59c5803f1a545d97fa3b6f67d05e1b07263bd55009794d4f35ebfb6d4651cc8b67482c7050baf922ce25

  • memory/2256-42-0x0000000001DF0000-0x0000000001E00000-memory.dmp

    Filesize

    64KB

  • memory/2256-44-0x0000000002DD0000-0x0000000002DD5000-memory.dmp

    Filesize

    20KB

  • memory/2256-43-0x0000000001DF0000-0x0000000001E00000-memory.dmp

    Filesize

    64KB

  • memory/2256-51-0x0000000007740000-0x0000000007B4B000-memory.dmp

    Filesize

    4.0MB

  • memory/2256-20-0x0000000002800000-0x0000000002A0F000-memory.dmp

    Filesize

    2.1MB

  • memory/2256-11-0x00000000008F0000-0x0000000000905000-memory.dmp

    Filesize

    84KB

  • memory/2256-14-0x00000000008F0000-0x0000000000905000-memory.dmp

    Filesize

    84KB

  • memory/2256-21-0x0000000001DE0000-0x0000000001DE6000-memory.dmp

    Filesize

    24KB

  • memory/2256-15-0x00000000008F0000-0x0000000000905000-memory.dmp

    Filesize

    84KB

  • memory/2256-41-0x0000000001DF0000-0x0000000001E00000-memory.dmp

    Filesize

    64KB

  • memory/2256-30-0x0000000001DF0000-0x0000000001E00000-memory.dmp

    Filesize

    64KB

  • memory/2256-18-0x0000000002800000-0x0000000002A0F000-memory.dmp

    Filesize

    2.1MB

  • memory/2256-47-0x0000000002DD0000-0x0000000002DD5000-memory.dmp

    Filesize

    20KB

  • memory/2256-52-0x0000000002DE0000-0x0000000002DE7000-memory.dmp

    Filesize

    28KB

  • memory/2256-48-0x0000000007740000-0x0000000007B4B000-memory.dmp

    Filesize

    4.0MB

  • memory/2256-29-0x0000000001DF0000-0x0000000001E00000-memory.dmp

    Filesize

    64KB

  • memory/2256-24-0x0000000001DF0000-0x0000000001E00000-memory.dmp

    Filesize

    64KB

  • memory/2256-27-0x0000000001DF0000-0x0000000001E00000-memory.dmp

    Filesize

    64KB

  • memory/2256-28-0x0000000001DF0000-0x0000000001E00000-memory.dmp

    Filesize

    64KB

  • memory/2256-40-0x0000000001DF0000-0x0000000001E00000-memory.dmp

    Filesize

    64KB

  • memory/2256-39-0x0000000001DF0000-0x0000000001E00000-memory.dmp

    Filesize

    64KB

  • memory/2256-38-0x0000000001DF0000-0x0000000001E00000-memory.dmp

    Filesize

    64KB

  • memory/2256-37-0x0000000001DF0000-0x0000000001E00000-memory.dmp

    Filesize

    64KB

  • memory/2256-36-0x0000000001DF0000-0x0000000001E00000-memory.dmp

    Filesize

    64KB

  • memory/2256-35-0x0000000001DF0000-0x0000000001E00000-memory.dmp

    Filesize

    64KB

  • memory/2256-34-0x0000000001DF0000-0x0000000001E00000-memory.dmp

    Filesize

    64KB

  • memory/2256-33-0x0000000001DF0000-0x0000000001E00000-memory.dmp

    Filesize

    64KB

  • memory/2256-32-0x0000000001DF0000-0x0000000001E00000-memory.dmp

    Filesize

    64KB

  • memory/2256-31-0x0000000001DF0000-0x0000000001E00000-memory.dmp

    Filesize

    64KB

  • memory/3240-12-0x0000000000400000-0x0000000002C6C000-memory.dmp

    Filesize

    40.4MB

  • memory/4384-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/4384-10-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/4384-2-0x00000000049B0000-0x00000000049C3000-memory.dmp

    Filesize

    76KB

  • memory/4384-7-0x0000000000400000-0x0000000002C6C000-memory.dmp

    Filesize

    40.4MB

  • memory/4384-9-0x00000000049B0000-0x00000000049C3000-memory.dmp

    Filesize

    76KB

  • memory/4384-1-0x0000000002D50000-0x0000000002E50000-memory.dmp

    Filesize

    1024KB