Analysis

  • max time kernel
    147s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    08/09/2024, 01:28

General

  • Target

    ae30f8849f76c8517dbb9922a570efd8b2a502292df7f768bfdeebab92aa52ba.exe

  • Size

    71KB

  • MD5

    26ebbf2fff571c90b3af42785d65db3a

  • SHA1

    20ddf85b7a5d92dd7e41fd22237556460f56e98b

  • SHA256

    ae30f8849f76c8517dbb9922a570efd8b2a502292df7f768bfdeebab92aa52ba

  • SHA512

    71b444041b967a33a89cf6c31090e86045f5f683dc577d1eae2696cbdae569e70a061968c1f9ba36d9515be14e2369020c74a2ea2ed2798a77778dfc06c050d9

  • SSDEEP

    1536:Dkes21VCy1nTxSYg3CXTjFWL9SdpIHUc:DDVCyFxSYACXF/pI0

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
  • Looks up external IP address via web service 3 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • 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\ae30f8849f76c8517dbb9922a570efd8b2a502292df7f768bfdeebab92aa52ba.exe
    "C:\Users\Admin\AppData\Local\Temp\ae30f8849f76c8517dbb9922a570efd8b2a502292df7f768bfdeebab92aa52ba.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2016
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hcvclxiu\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2896
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\hormlffz.exe" C:\Windows\SysWOW64\hcvclxiu\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2320
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create hcvclxiu binPath= "C:\Windows\SysWOW64\hcvclxiu\hormlffz.exe /d\"C:\Users\Admin\AppData\Local\Temp\ae30f8849f76c8517dbb9922a570efd8b2a502292df7f768bfdeebab92aa52ba.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1436
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description hcvclxiu "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2672
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start hcvclxiu
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2788
    • 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:2808
  • C:\Windows\SysWOW64\hcvclxiu\hormlffz.exe
    C:\Windows\SysWOW64\hcvclxiu\hormlffz.exe /d"C:\Users\Admin\AppData\Local\Temp\ae30f8849f76c8517dbb9922a570efd8b2a502292df7f768bfdeebab92aa52ba.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2684
    • 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:2540

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    11.3MB

    MD5

    371bab10e4c27f7702b6de07c24c6a96

    SHA1

    cbc0177cbad931aec52b2e153c67291fb4dd7f93

    SHA256

    10e297f36011472eb0719d533b8399173927dff3aec9004aeff2172131ef46b8

    SHA512

    a3f58da65e9c9b2779fd6adb6090e4133c3d633f9864c4efeb8cdd7fe5fabd2e5b233c86f327acdc36b1906a99a64b2e83392bbdb1f8835e34423caf3773f96e

  • memory/2540-6-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2540-5-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2540-3-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2540-8-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2540-9-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2540-11-0x0000000001AF0000-0x0000000001CFF000-memory.dmp

    Filesize

    2.1MB

  • memory/2540-14-0x0000000001AF0000-0x0000000001CFF000-memory.dmp

    Filesize

    2.1MB

  • memory/2540-15-0x0000000000110000-0x0000000000116000-memory.dmp

    Filesize

    24KB

  • memory/2540-18-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2540-42-0x0000000005420000-0x000000000582B000-memory.dmp

    Filesize

    4.0MB

  • memory/2540-46-0x0000000000140000-0x0000000000147000-memory.dmp

    Filesize

    28KB

  • memory/2540-41-0x0000000000130000-0x0000000000135000-memory.dmp

    Filesize

    20KB

  • memory/2540-38-0x0000000000130000-0x0000000000135000-memory.dmp

    Filesize

    20KB

  • memory/2540-37-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2540-36-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2540-35-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2540-34-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2540-33-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2540-32-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2540-31-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2540-30-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2540-29-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2540-28-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2540-27-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2540-26-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2540-25-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2540-24-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2540-23-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2540-22-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2540-21-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2540-45-0x0000000005420000-0x000000000582B000-memory.dmp

    Filesize

    4.0MB