Analysis

  • max time kernel
    113s
  • max time network
    124s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    10/09/2024, 02:22

General

  • Target

    3570b0f48378f2648f14f04bfc148ec0N.exe

  • Size

    191KB

  • MD5

    3570b0f48378f2648f14f04bfc148ec0

  • SHA1

    bccd7d4cb74cc45746aab0ea4f1e4909431b07e2

  • SHA256

    580374ec67e09e658a8094b35111a37d8e395c4d9893bc62f4b12de1f911eeb4

  • SHA512

    5ff75b6d99603318f3f5456c947bf6018d452ffb4f136453da8a71bb2443a3128d8dd0ba3ccdbee162b880761e7aee9db74feb908df0bd9c21aa419f57524410

  • SSDEEP

    1536:vwnZKshTFploXRY9PmoUAiZRuETzmsropBAaGCzP9HKglyI0q3uyPW5tZZT9HLaG:Kbba/PZRVesLG0g0kuyu5tXg7gq/

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 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3570b0f48378f2648f14f04bfc148ec0N.exe
    "C:\Users\Admin\AppData\Local\Temp\3570b0f48378f2648f14f04bfc148ec0N.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2908
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jiubycrx\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2608
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ecrzsidz.exe" C:\Windows\SysWOW64\jiubycrx\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2732
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create jiubycrx binPath= "C:\Windows\SysWOW64\jiubycrx\ecrzsidz.exe /d\"C:\Users\Admin\AppData\Local\Temp\3570b0f48378f2648f14f04bfc148ec0N.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2624
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description jiubycrx "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2804
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start jiubycrx
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2496
    • 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:2764
  • C:\Windows\SysWOW64\jiubycrx\ecrzsidz.exe
    C:\Windows\SysWOW64\jiubycrx\ecrzsidz.exe /d"C:\Users\Admin\AppData\Local\Temp\3570b0f48378f2648f14f04bfc148ec0N.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2604
    • 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:1980

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    11.7MB

    MD5

    f29b842f3c1ce75a485b44714f1964fb

    SHA1

    5fd9b9be1de218b56a2a3b0d3918155a4db64ef5

    SHA256

    1ea223719f6000b83963f3e1d0e4ca216cdf3e94046a6ddbe23215f1046c4954

    SHA512

    095ea6dadb66eaa01ef38c5ffd158d5809ffae4a6f123be1caa7ba88d7f9bfdff0d3072c17da4e8f4fd11d39df1a3277bed0be0a3332c47397703e7abab5a2c7

  • memory/1980-30-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/1980-45-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/1980-38-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/1980-35-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/1980-36-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/1980-16-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/1980-14-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/1980-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/1980-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/1980-23-0x0000000001980000-0x0000000001B8F000-memory.dmp

    Filesize

    2.1MB

  • memory/1980-39-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/1980-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/1980-20-0x0000000001980000-0x0000000001B8F000-memory.dmp

    Filesize

    2.1MB

  • memory/1980-33-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/1980-34-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/1980-32-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/1980-31-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/1980-40-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/1980-41-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/1980-24-0x0000000000110000-0x0000000000116000-memory.dmp

    Filesize

    24KB

  • memory/1980-42-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/1980-37-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/1980-54-0x0000000005370000-0x000000000577B000-memory.dmp

    Filesize

    4.0MB

  • memory/1980-55-0x0000000000180000-0x0000000000187000-memory.dmp

    Filesize

    28KB

  • memory/1980-51-0x0000000005370000-0x000000000577B000-memory.dmp

    Filesize

    4.0MB

  • memory/1980-50-0x0000000000170000-0x0000000000175000-memory.dmp

    Filesize

    20KB

  • memory/1980-47-0x0000000000170000-0x0000000000175000-memory.dmp

    Filesize

    20KB

  • memory/1980-46-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/1980-27-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/1980-44-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/1980-43-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2604-17-0x0000000000400000-0x000000000234D000-memory.dmp

    Filesize

    31.3MB

  • memory/2908-8-0x0000000000400000-0x000000000234D000-memory.dmp

    Filesize

    31.3MB

  • memory/2908-4-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2908-1-0x00000000023F0000-0x00000000024F0000-memory.dmp

    Filesize

    1024KB

  • memory/2908-9-0x0000000000230000-0x0000000000243000-memory.dmp

    Filesize

    76KB

  • memory/2908-10-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2908-2-0x0000000000230000-0x0000000000243000-memory.dmp

    Filesize

    76KB