Analysis

  • max time kernel
    149s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    05-09-2024 01:42

General

  • Target

    2cccbfbe95b716e6f8b5ed1634b9ae4e6ab87e1355804ca5aea8d353673ff6a2.exe

  • Size

    423KB

  • MD5

    b2e864c2f8f6e243822a5c133bb41061

  • SHA1

    5571df4cdc5b65cdc315c95ee52344dda7f12b20

  • SHA256

    2cccbfbe95b716e6f8b5ed1634b9ae4e6ab87e1355804ca5aea8d353673ff6a2

  • SHA512

    32a6087702abe92daab3e2c194b07006f5b9d3cdf48c692d23775f0d75e2941882920767148564ac7fedc417beadb1ae75734f240d07bec30eb262ae4f534e73

  • SSDEEP

    6144:qc6OZDisWsD0Td2HJxO+m8PuG1R4WnWjrsaz:q1OZDisvwdaxO0PuG1R4CWs

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\2cccbfbe95b716e6f8b5ed1634b9ae4e6ab87e1355804ca5aea8d353673ff6a2.exe
    "C:\Users\Admin\AppData\Local\Temp\2cccbfbe95b716e6f8b5ed1634b9ae4e6ab87e1355804ca5aea8d353673ff6a2.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2504
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ieicsnx\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2480
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\clrcaph.exe" C:\Windows\SysWOW64\ieicsnx\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2440
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create ieicsnx binPath= "C:\Windows\SysWOW64\ieicsnx\clrcaph.exe /d\"C:\Users\Admin\AppData\Local\Temp\2cccbfbe95b716e6f8b5ed1634b9ae4e6ab87e1355804ca5aea8d353673ff6a2.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2632
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description ieicsnx "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2680
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start ieicsnx
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2756
    • 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:2576
  • C:\Windows\SysWOW64\ieicsnx\clrcaph.exe
    C:\Windows\SysWOW64\ieicsnx\clrcaph.exe /d"C:\Users\Admin\AppData\Local\Temp\2cccbfbe95b716e6f8b5ed1634b9ae4e6ab87e1355804ca5aea8d353673ff6a2.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2692
    • 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:2820

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    12.2MB

    MD5

    01e6f80027e04f0fa606a7897fa88c43

    SHA1

    b9b4023041db77ed9d55dfb20bce471711806336

    SHA256

    69895caae9757ffd44aa5c037807db595c824731838af11a5f4b1dd82772863d

    SHA512

    e48fa4575b0ee6d2e5f0a7a8f3bd1e4a56e0a16038632771e02479b775c5ec32719467654af129cb856a18fa63aee248baf5c0f9349ddb04c8fed58dfa48c1b9

  • memory/2504-17-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2504-2-0x00000000001B0000-0x00000000001C3000-memory.dmp

    Filesize

    76KB

  • memory/2504-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2504-1-0x00000000002B0000-0x00000000003B0000-memory.dmp

    Filesize

    1024KB

  • memory/2504-15-0x00000000001B0000-0x00000000001C3000-memory.dmp

    Filesize

    76KB

  • memory/2504-16-0x00000000002B0000-0x00000000003B0000-memory.dmp

    Filesize

    1024KB

  • memory/2504-14-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

  • memory/2692-13-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

  • memory/2820-32-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

  • memory/2820-35-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

  • memory/2820-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2820-18-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2820-19-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2820-21-0x0000000001970000-0x0000000001B7F000-memory.dmp

    Filesize

    2.1MB

  • memory/2820-52-0x00000000055C0000-0x00000000059CB000-memory.dmp

    Filesize

    4.0MB

  • memory/2820-24-0x0000000001970000-0x0000000001B7F000-memory.dmp

    Filesize

    2.1MB

  • memory/2820-25-0x0000000000160000-0x0000000000166000-memory.dmp

    Filesize

    24KB

  • memory/2820-28-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

  • memory/2820-31-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

  • memory/2820-11-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2820-33-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

  • memory/2820-36-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

  • memory/2820-37-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

  • memory/2820-8-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2820-34-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

  • memory/2820-38-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

  • memory/2820-39-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

  • memory/2820-40-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

  • memory/2820-41-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

  • memory/2820-42-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

  • memory/2820-43-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

  • memory/2820-44-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

  • memory/2820-45-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

  • memory/2820-51-0x0000000000180000-0x0000000000185000-memory.dmp

    Filesize

    20KB

  • memory/2820-48-0x0000000000180000-0x0000000000185000-memory.dmp

    Filesize

    20KB

  • memory/2820-47-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

  • memory/2820-46-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

  • memory/2820-56-0x00000000001C0000-0x00000000001C7000-memory.dmp

    Filesize

    28KB

  • memory/2820-55-0x00000000055C0000-0x00000000059CB000-memory.dmp

    Filesize

    4.0MB