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Analysis

  • max time kernel
    146s
  • max time network
    147s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    29/12/2024, 22:15

General

  • Target

    0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe

  • Size

    13.0MB

  • MD5

    d4fbad00810efbb5dbd8a2452fe04ec3

  • SHA1

    65884289994c879fdf192a5e6662a04d1a2f649e

  • SHA256

    0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea

  • SHA512

    b38b6d38106d8cb16dc5967ddd3be58bb5a4475867f1271896f1dbfc516d68b3f5de992a47ef31149ef264d889a1be8990ae26619ec6cc6c2b3a550bf69e7dd8

  • SSDEEP

    24576:cqkEnA6V///////////////////////////////////////////////////////3:cqC

Malware Config

Extracted

Family

tofsee

C2

niflheimr.cn

jotunheim.name

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

  • Tofsee family
  • 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
  • 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.

  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe
    "C:\Users\Admin\AppData\Local\Temp\0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2944
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\reerejkj\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2500
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\eygedrn.exe" C:\Windows\SysWOW64\reerejkj\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1924
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create reerejkj binPath= "C:\Windows\SysWOW64\reerejkj\eygedrn.exe /d\"C:\Users\Admin\AppData\Local\Temp\0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2856
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description reerejkj "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1292
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start reerejkj
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2684
    • 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:2908
  • C:\Windows\SysWOW64\reerejkj\eygedrn.exe
    C:\Windows\SysWOW64\reerejkj\eygedrn.exe /d"C:\Users\Admin\AppData\Local\Temp\0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2804
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Windows security bypass
      • Sets service image path in registry
      • Deletes itself
      • System Location Discovery: System Language Discovery
      PID:2568

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    11.4MB

    MD5

    8b95abb5f9bfdf12a7a2062db554861a

    SHA1

    e85bd489332b974e0acaca1738b45fb8d8ae0afb

    SHA256

    33488f1d8b40f926999c7dfe42a7e4992d55aff7bca5f29e189ca3099236a209

    SHA512

    94e94e248e8ef6aa6c39f73e5a9bb355100679870a6c69a52f132eaf377142ade0b70f752aa024a0d47cbd97725b58b31ca4764d74d178d33fed862018dd2ffd

  • memory/2568-14-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2568-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2568-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2568-17-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2568-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2804-15-0x0000000000400000-0x0000000000447000-memory.dmp

    Filesize

    284KB

  • memory/2944-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2944-2-0x00000000001B0000-0x00000000001C3000-memory.dmp

    Filesize

    76KB

  • memory/2944-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2944-8-0x00000000001B0000-0x00000000001C3000-memory.dmp

    Filesize

    76KB

  • memory/2944-7-0x0000000000400000-0x0000000000447000-memory.dmp

    Filesize

    284KB

  • memory/2944-1-0x0000000000290000-0x0000000000390000-memory.dmp

    Filesize

    1024KB