Analysis

  • max time kernel
    116s
  • max time network
    123s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-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.

  • 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\36d7959dd852cb38f1855d7883baa1199dae561b7fca37da5c1571146e0500ebN.exe
    "C:\Users\Admin\AppData\Local\Temp\36d7959dd852cb38f1855d7883baa1199dae561b7fca37da5c1571146e0500ebN.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1988
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\sfgexrjh\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2040
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jvdagtzx.exe" C:\Windows\SysWOW64\sfgexrjh\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:900
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create sfgexrjh binPath= "C:\Windows\SysWOW64\sfgexrjh\jvdagtzx.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:2780
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description sfgexrjh "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2668
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start sfgexrjh
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:916
    • 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:4824
  • C:\Windows\SysWOW64\sfgexrjh\jvdagtzx.exe
    C:\Windows\SysWOW64\sfgexrjh\jvdagtzx.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:4092
    • 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:4608

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    11.5MB

    MD5

    4f6b4cafa5a7e9a6b5ac0cdf7b9ab416

    SHA1

    4daea1abcd5939da0c528bc2d061455353fb8529

    SHA256

    95afbc890289ee63bbc6dbdcd398ee5d6f297deb41ad6e855d8349e8916b92b9

    SHA512

    d534c9143328ddc76060d7aeb3bb3ed8e36beb1e3df7716f4e34e354d7f0af610a090637eb94e1ec17fee068a8a9b018bf74caf0a53e343152b0e0b3ebb90764

  • memory/4608-3-0x0000000000C90000-0x0000000000CA5000-memory.dmp

    Filesize

    84KB

  • memory/4608-6-0x0000000000C90000-0x0000000000CA5000-memory.dmp

    Filesize

    84KB

  • memory/4608-7-0x0000000000C90000-0x0000000000CA5000-memory.dmp

    Filesize

    84KB

  • memory/4608-8-0x0000000000C90000-0x0000000000CA5000-memory.dmp

    Filesize

    84KB

  • memory/4608-10-0x0000000000C90000-0x0000000000CA5000-memory.dmp

    Filesize

    84KB

  • memory/4608-12-0x0000000002800000-0x0000000002A0F000-memory.dmp

    Filesize

    2.1MB

  • memory/4608-42-0x0000000007840000-0x0000000007C4B000-memory.dmp

    Filesize

    4.0MB

  • memory/4608-46-0x0000000007D90000-0x0000000007D97000-memory.dmp

    Filesize

    28KB

  • memory/4608-41-0x0000000002DF0000-0x0000000002DF5000-memory.dmp

    Filesize

    20KB

  • memory/4608-38-0x0000000002DF0000-0x0000000002DF5000-memory.dmp

    Filesize

    20KB

  • memory/4608-36-0x0000000002B60000-0x0000000002B70000-memory.dmp

    Filesize

    64KB

  • memory/4608-34-0x0000000002B60000-0x0000000002B70000-memory.dmp

    Filesize

    64KB

  • memory/4608-33-0x0000000002B60000-0x0000000002B70000-memory.dmp

    Filesize

    64KB

  • memory/4608-32-0x0000000002B60000-0x0000000002B70000-memory.dmp

    Filesize

    64KB

  • memory/4608-31-0x0000000002B60000-0x0000000002B70000-memory.dmp

    Filesize

    64KB

  • memory/4608-30-0x0000000002B60000-0x0000000002B70000-memory.dmp

    Filesize

    64KB

  • memory/4608-29-0x0000000002B60000-0x0000000002B70000-memory.dmp

    Filesize

    64KB

  • memory/4608-28-0x0000000002B60000-0x0000000002B70000-memory.dmp

    Filesize

    64KB

  • memory/4608-27-0x0000000002B60000-0x0000000002B70000-memory.dmp

    Filesize

    64KB

  • memory/4608-26-0x0000000002B60000-0x0000000002B70000-memory.dmp

    Filesize

    64KB

  • memory/4608-45-0x0000000007840000-0x0000000007C4B000-memory.dmp

    Filesize

    4.0MB

  • memory/4608-24-0x0000000002B60000-0x0000000002B70000-memory.dmp

    Filesize

    64KB

  • memory/4608-23-0x0000000002B60000-0x0000000002B70000-memory.dmp

    Filesize

    64KB

  • memory/4608-21-0x0000000002B60000-0x0000000002B70000-memory.dmp

    Filesize

    64KB

  • memory/4608-22-0x0000000002B60000-0x0000000002B70000-memory.dmp

    Filesize

    64KB

  • memory/4608-14-0x0000000002800000-0x0000000002A0F000-memory.dmp

    Filesize

    2.1MB

  • memory/4608-37-0x0000000002B60000-0x0000000002B70000-memory.dmp

    Filesize

    64KB

  • memory/4608-35-0x0000000002B60000-0x0000000002B70000-memory.dmp

    Filesize

    64KB

  • memory/4608-25-0x0000000002B60000-0x0000000002B70000-memory.dmp

    Filesize

    64KB

  • memory/4608-18-0x0000000002B60000-0x0000000002B70000-memory.dmp

    Filesize

    64KB

  • memory/4608-15-0x0000000002B50000-0x0000000002B56000-memory.dmp

    Filesize

    24KB