Analysis

  • max time kernel
    114s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    22-10-2024 05:42

General

  • Target

    36d7959dd852cb38f1855d7883baa1199dae561b7fca37da5c1571146e0500ebN.exe

  • Size

    71KB

  • MD5

    af479197a487d7075de8760e175e2e60

  • SHA1

    1a0deb754aebcba3e7247ee72cd2153919fcfc29

  • SHA256

    36d7959dd852cb38f1855d7883baa1199dae561b7fca37da5c1571146e0500eb

  • SHA512

    9448d9d1c18a8726d7903a2b2bb1485e5ce92481d28d69eb1e82b2b636c2c6a41da8e949d5472e77939081d178a62d2f6e65d4f318f62e30573f49ceb9cd4043

  • SSDEEP

    1536:Dkes21VCy1nTxSYg3CXTjFWL9KdpIHUc:DDVCyFxSYACXFHpI0

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\36d7959dd852cb38f1855d7883baa1199dae561b7fca37da5c1571146e0500ebN.exe
    "C:\Users\Admin\AppData\Local\Temp\36d7959dd852cb38f1855d7883baa1199dae561b7fca37da5c1571146e0500ebN.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2084
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ijiqibod\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2744
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\sietogem.exe" C:\Windows\SysWOW64\ijiqibod\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2372
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create ijiqibod binPath= "C:\Windows\SysWOW64\ijiqibod\sietogem.exe /d\"C:\Users\Admin\AppData\Local\Temp\36d7959dd852cb38f1855d7883baa1199dae561b7fca37da5c1571146e0500ebN.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2708
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description ijiqibod "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2684
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start ijiqibod
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2836
    • 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:2612
  • C:\Windows\SysWOW64\ijiqibod\sietogem.exe
    C:\Windows\SysWOW64\ijiqibod\sietogem.exe /d"C:\Users\Admin\AppData\Local\Temp\36d7959dd852cb38f1855d7883baa1199dae561b7fca37da5c1571146e0500ebN.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2720
    • 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:2584

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    14.7MB

    MD5

    fb75fa939985a43ad1d8a49255930a44

    SHA1

    c09e667f3c8da2b89b23794cf0c1358a033aaee7

    SHA256

    c38a5eb5ebdf29bfb36f2b9a501e902dfdc57ef6e2e29cbd31f0d7870884bf32

    SHA512

    810977b4c8672207510c438930959907a674241ee294054e8687bbe780aea9b1d2890beb6d9032b9915ba88ceb6f1937229cd0bd696d3161fede2b4dcac70c53

  • memory/2584-6-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2584-5-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2584-3-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2584-8-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2584-9-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2584-18-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2584-15-0x0000000000110000-0x0000000000116000-memory.dmp

    Filesize

    24KB

  • memory/2584-14-0x00000000019E0000-0x0000000001BEF000-memory.dmp

    Filesize

    2.1MB

  • memory/2584-11-0x00000000019E0000-0x0000000001BEF000-memory.dmp

    Filesize

    2.1MB

  • memory/2584-21-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2584-25-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2584-26-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2584-22-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2584-27-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2584-24-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2584-23-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2584-28-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2584-29-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2584-30-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2584-46-0x0000000000190000-0x0000000000197000-memory.dmp

    Filesize

    28KB

  • memory/2584-31-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2584-45-0x00000000054E0000-0x00000000058EB000-memory.dmp

    Filesize

    4.0MB

  • memory/2584-42-0x00000000054E0000-0x00000000058EB000-memory.dmp

    Filesize

    4.0MB

  • memory/2584-41-0x0000000000130000-0x0000000000135000-memory.dmp

    Filesize

    20KB

  • memory/2584-38-0x0000000000130000-0x0000000000135000-memory.dmp

    Filesize

    20KB

  • memory/2584-37-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2584-36-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2584-35-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2584-34-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2584-33-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2584-32-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB