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Analysis

  • max time kernel
    146s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-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.

  • Creates new service(s) 2 TTPs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2d49ab2f33264eb29d38ab91a7c6dc193a6a0fa65260b0295b1123c18612d7c5.exe
    "C:\Users\Admin\AppData\Local\Temp\2d49ab2f33264eb29d38ab91a7c6dc193a6a0fa65260b0295b1123c18612d7c5.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4512
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qqmsoyl\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3436
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\amurxkqo.exe" C:\Windows\SysWOW64\qqmsoyl\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4988
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create qqmsoyl binPath= "C:\Windows\SysWOW64\qqmsoyl\amurxkqo.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:1180
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description qqmsoyl "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1504
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start qqmsoyl
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3528
    • 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:2860
  • C:\Windows\SysWOW64\qqmsoyl\amurxkqo.exe
    C:\Windows\SysWOW64\qqmsoyl\amurxkqo.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:4852
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • 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:4432

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    10.2MB

    MD5

    f891fce8d84c5de1dec7ad44aca0c79d

    SHA1

    d0e5fd7bf5c068c54f3b65983b3ab0035daa5b8d

    SHA256

    b6222b30c334201c463ef88a0f66f20f7bd6e63c4000b18a06a129750828d345

    SHA512

    e4a4f32ecb3d841496bca588926cf93d7f0d1b68d2f7cbc831dfd5c73a3c0948c9e41083757bfa4cb9a63d5cafab65d1063c9033cee7bf8b9c25ee5f70359624

  • memory/4432-50-0x00000000017F0000-0x00000000017F5000-memory.dmp

    Filesize

    20KB

  • memory/4432-37-0x00000000017E0000-0x00000000017F0000-memory.dmp

    Filesize

    64KB

  • memory/4432-33-0x00000000017E0000-0x00000000017F0000-memory.dmp

    Filesize

    64KB

  • memory/4432-23-0x0000000002000000-0x000000000220F000-memory.dmp

    Filesize

    2.1MB

  • memory/4432-24-0x00000000001F0000-0x00000000001F6000-memory.dmp

    Filesize

    24KB

  • memory/4432-27-0x00000000017E0000-0x00000000017F0000-memory.dmp

    Filesize

    64KB

  • memory/4432-30-0x00000000017E0000-0x00000000017F0000-memory.dmp

    Filesize

    64KB

  • memory/4432-32-0x00000000017E0000-0x00000000017F0000-memory.dmp

    Filesize

    64KB

  • memory/4432-13-0x0000000000110000-0x0000000000125000-memory.dmp

    Filesize

    84KB

  • memory/4432-45-0x00000000017E0000-0x00000000017F0000-memory.dmp

    Filesize

    64KB

  • memory/4432-34-0x00000000017E0000-0x00000000017F0000-memory.dmp

    Filesize

    64KB

  • memory/4432-18-0x0000000000110000-0x0000000000125000-memory.dmp

    Filesize

    84KB

  • memory/4432-21-0x0000000002000000-0x000000000220F000-memory.dmp

    Filesize

    2.1MB

  • memory/4432-31-0x00000000017E0000-0x00000000017F0000-memory.dmp

    Filesize

    64KB

  • memory/4432-55-0x00000000023D0000-0x00000000023D7000-memory.dmp

    Filesize

    28KB

  • memory/4432-54-0x0000000006F00000-0x000000000730B000-memory.dmp

    Filesize

    4.0MB

  • memory/4432-51-0x0000000006F00000-0x000000000730B000-memory.dmp

    Filesize

    4.0MB

  • memory/4432-35-0x00000000017E0000-0x00000000017F0000-memory.dmp

    Filesize

    64KB

  • memory/4432-36-0x00000000017E0000-0x00000000017F0000-memory.dmp

    Filesize

    64KB

  • memory/4432-46-0x00000000017E0000-0x00000000017F0000-memory.dmp

    Filesize

    64KB

  • memory/4432-15-0x0000000000110000-0x0000000000125000-memory.dmp

    Filesize

    84KB

  • memory/4432-44-0x00000000017E0000-0x00000000017F0000-memory.dmp

    Filesize

    64KB

  • memory/4432-43-0x00000000017E0000-0x00000000017F0000-memory.dmp

    Filesize

    64KB

  • memory/4432-42-0x00000000017E0000-0x00000000017F0000-memory.dmp

    Filesize

    64KB

  • memory/4432-41-0x00000000017E0000-0x00000000017F0000-memory.dmp

    Filesize

    64KB

  • memory/4432-40-0x00000000017E0000-0x00000000017F0000-memory.dmp

    Filesize

    64KB

  • memory/4432-39-0x00000000017E0000-0x00000000017F0000-memory.dmp

    Filesize

    64KB

  • memory/4432-38-0x00000000017E0000-0x00000000017F0000-memory.dmp

    Filesize

    64KB

  • memory/4432-47-0x00000000017F0000-0x00000000017F5000-memory.dmp

    Filesize

    20KB

  • memory/4512-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/4512-1-0x0000000000890000-0x0000000000990000-memory.dmp

    Filesize

    1024KB

  • memory/4512-8-0x0000000000680000-0x0000000000693000-memory.dmp

    Filesize

    76KB

  • memory/4512-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/4512-7-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

  • memory/4512-2-0x0000000000680000-0x0000000000693000-memory.dmp

    Filesize

    76KB

  • memory/4852-17-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

  • memory/4852-12-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

  • memory/4852-11-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB