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Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    04/09/2024, 01:16

General

  • Target

    2d49ab2f33264eb29d38ab91a7c6dc193a6a0fa65260b0295b1123c18612d7c5.exe

  • Size

    11.8MB

  • MD5

    b32f61c5c47e9473cf4a0ac98e8143c1

  • SHA1

    d6de6d48a87510f4ba641785e56311a4732dcf26

  • SHA256

    2d49ab2f33264eb29d38ab91a7c6dc193a6a0fa65260b0295b1123c18612d7c5

  • SHA512

    cc0cc0499616d0277920597b7beb8ee0b53d99c9e8d8c827c6e2244dc9a98785a848f17368f6991d362f9b6f76cd3a1f7ebcc31e99c34097c458872336ab5c21

  • SSDEEP

    6144:9c6OZDisWsD0Td2HJxO+m8PuG1R4WnWjrsaz:91OZDisvwdaxO0PuG1R4CWs

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\2d49ab2f33264eb29d38ab91a7c6dc193a6a0fa65260b0295b1123c18612d7c5.exe
    "C:\Users\Admin\AppData\Local\Temp\2d49ab2f33264eb29d38ab91a7c6dc193a6a0fa65260b0295b1123c18612d7c5.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2336
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\deouliht\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:316
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\tfrwtzym.exe" C:\Windows\SysWOW64\deouliht\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2080
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create deouliht binPath= "C:\Windows\SysWOW64\deouliht\tfrwtzym.exe /d\"C:\Users\Admin\AppData\Local\Temp\2d49ab2f33264eb29d38ab91a7c6dc193a6a0fa65260b0295b1123c18612d7c5.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2264
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description deouliht "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2260
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start deouliht
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2796
    • 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:2800
  • C:\Windows\SysWOW64\deouliht\tfrwtzym.exe
    C:\Windows\SysWOW64\deouliht\tfrwtzym.exe /d"C:\Users\Admin\AppData\Local\Temp\2d49ab2f33264eb29d38ab91a7c6dc193a6a0fa65260b0295b1123c18612d7c5.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2948
    • 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:2696

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    13.8MB

    MD5

    0ee5eb3b1dce4f66120c32664d9e387d

    SHA1

    b08325dba7e5b07a38255145f7e888c3283ceef9

    SHA256

    62f969177714ffe49dbb437048c148a6ffe82309474e7d9d3cd6f5b93f67415c

    SHA512

    9312e29decde3509f2be330fb7e8697912c02bb40500eefb89c2bcc61c268e99a4c6bf8e40e569afd8be202180c7533fe3e08613f17cf5e1cf3c286d0b5958a0

  • memory/2336-17-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2336-2-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/2336-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2336-1-0x0000000000740000-0x0000000000840000-memory.dmp

    Filesize

    1024KB

  • memory/2336-14-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

  • memory/2336-15-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/2336-16-0x0000000000740000-0x0000000000840000-memory.dmp

    Filesize

    1024KB

  • memory/2696-32-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2696-42-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2696-8-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2696-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2696-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2696-19-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2696-24-0x0000000001910000-0x0000000001B1F000-memory.dmp

    Filesize

    2.1MB

  • memory/2696-25-0x00000000000B0000-0x00000000000B6000-memory.dmp

    Filesize

    24KB

  • memory/2696-28-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2696-21-0x0000000001910000-0x0000000001B1F000-memory.dmp

    Filesize

    2.1MB

  • memory/2696-35-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2696-31-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2696-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2696-41-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2696-33-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2696-36-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2696-34-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2696-53-0x0000000005470000-0x000000000587B000-memory.dmp

    Filesize

    4.0MB

  • memory/2696-51-0x00000000000D0000-0x00000000000D5000-memory.dmp

    Filesize

    20KB

  • memory/2696-55-0x0000000005470000-0x000000000587B000-memory.dmp

    Filesize

    4.0MB

  • memory/2696-56-0x0000000000200000-0x0000000000207000-memory.dmp

    Filesize

    28KB

  • memory/2696-48-0x00000000000D0000-0x00000000000D5000-memory.dmp

    Filesize

    20KB

  • memory/2696-47-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2696-46-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2696-45-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2696-44-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2696-43-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2696-40-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2696-39-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2696-38-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2696-37-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2948-12-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB