Analysis

  • max time kernel
    150s
  • max time network
    155s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
  • submitted
    22-10-2024 05:45

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:2220
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\odlvzyfn\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:928
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vcbowwei.exe" C:\Windows\SysWOW64\odlvzyfn\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1040
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create odlvzyfn binPath= "C:\Windows\SysWOW64\odlvzyfn\vcbowwei.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:2816
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description odlvzyfn "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2356
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start odlvzyfn
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2868
    • 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:2856
  • C:\Windows\SysWOW64\odlvzyfn\vcbowwei.exe
    C:\Windows\SysWOW64\odlvzyfn\vcbowwei.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:2740
    • 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:2176

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    14.9MB

    MD5

    7638ee9e0b9cda03e042bbbc7bc4cfd2

    SHA1

    49572a060a75ead32f86bf2ffdd7b248c284dea7

    SHA256

    b5b516e019d049cbbfba134bf5d240a1d944398a4668439f0e257f84678942ca

    SHA512

    009c4fd95ef4952a1cbfa0f4f848646cb8db74c8907b324c05ed0243670d0fa2765bd9cc542f23f67c7a49c9eabc5dc4d61e5ca1f927fc935252d534951a9b8a

  • memory/2176-3-0x00000000000D0000-0x00000000000E5000-memory.dmp

    Filesize

    84KB

  • memory/2176-5-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2176-6-0x00000000000D0000-0x00000000000E5000-memory.dmp

    Filesize

    84KB

  • memory/2176-8-0x00000000000D0000-0x00000000000E5000-memory.dmp

    Filesize

    84KB

  • memory/2176-9-0x00000000000D0000-0x00000000000E5000-memory.dmp

    Filesize

    84KB

  • memory/2176-11-0x00000000018F0000-0x0000000001AFF000-memory.dmp

    Filesize

    2.1MB

  • memory/2176-41-0x00000000001F0000-0x00000000001F5000-memory.dmp

    Filesize

    20KB

  • memory/2176-38-0x00000000001F0000-0x00000000001F5000-memory.dmp

    Filesize

    20KB

  • memory/2176-37-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2176-36-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2176-35-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2176-34-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2176-33-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2176-32-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2176-31-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2176-30-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2176-29-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2176-28-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2176-27-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2176-26-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2176-25-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2176-24-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2176-23-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2176-22-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2176-21-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2176-18-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2176-15-0x0000000000080000-0x0000000000086000-memory.dmp

    Filesize

    24KB

  • memory/2176-14-0x00000000018F0000-0x0000000001AFF000-memory.dmp

    Filesize

    2.1MB

  • memory/2176-46-0x0000000000220000-0x0000000000227000-memory.dmp

    Filesize

    28KB

  • memory/2176-42-0x00000000054E0000-0x00000000058EB000-memory.dmp

    Filesize

    4.0MB

  • memory/2176-45-0x00000000054E0000-0x00000000058EB000-memory.dmp

    Filesize

    4.0MB