Analysis

  • max time kernel
    148s
  • max time network
    140s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07-09-2024 01:21

General

  • Target

    6144c9369be2e903bdd67a73d031dac6e9edf69d54956ce1de82749ad4c0759f.exe

  • Size

    191KB

  • MD5

    57d8986f5db1704c0d6a46f1c6cbd77e

  • SHA1

    8d1761161e37a7c071d19700cb2b3a073d28f6f0

  • SHA256

    6144c9369be2e903bdd67a73d031dac6e9edf69d54956ce1de82749ad4c0759f

  • SHA512

    cbe09dd61dbf004195fef0dbe15c4abe6eaa6d7f6cfdf87b6019f46a585eedd3f97ff9f9da924bd9e673655096e005058cf3a2f6799b31cbce9ab9966ddeb6b6

  • SSDEEP

    3072:jH+lBBpz9/vh9yxqucBeJAD/MsgzPl5LjRZkpyqp29yOyb1:SBpz9/vh9yxWe+0sgzP/LjRZoJH

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\6144c9369be2e903bdd67a73d031dac6e9edf69d54956ce1de82749ad4c0759f.exe
    "C:\Users\Admin\AppData\Local\Temp\6144c9369be2e903bdd67a73d031dac6e9edf69d54956ce1de82749ad4c0759f.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1080
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kcpqqoic\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3264
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\mcczlxnl.exe" C:\Windows\SysWOW64\kcpqqoic\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1028
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create kcpqqoic binPath= "C:\Windows\SysWOW64\kcpqqoic\mcczlxnl.exe /d\"C:\Users\Admin\AppData\Local\Temp\6144c9369be2e903bdd67a73d031dac6e9edf69d54956ce1de82749ad4c0759f.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:456
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description kcpqqoic "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2592
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start kcpqqoic
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:5080
    • 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:1808
  • C:\Windows\SysWOW64\kcpqqoic\mcczlxnl.exe
    C:\Windows\SysWOW64\kcpqqoic\mcczlxnl.exe /d"C:\Users\Admin\AppData\Local\Temp\6144c9369be2e903bdd67a73d031dac6e9edf69d54956ce1de82749ad4c0759f.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3344
    • 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:2380

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    11.7MB

    MD5

    8ce7842369cd2d6ad47d72615c3cb728

    SHA1

    5656d9a2191262dc9d56ad613a8fd7b2cceaf4e9

    SHA256

    a3e607f92082e57a3da0fe4abbb9161d56f1d5d5fce9bde348b5f754c06f01c5

    SHA512

    4250dc0d37725ecf0b5d1924d596ac65fd68c5a4d927fee2c252ae774f4bb61a67d92a6cc0c3f075cf198eb58fdc40681d68e818f81633fb2918a1652f7554f8

  • memory/1080-1-0x00000000007C0000-0x00000000008C0000-memory.dmp

    Filesize

    1024KB

  • memory/1080-2-0x00000000006F0000-0x0000000000703000-memory.dmp

    Filesize

    76KB

  • memory/1080-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/1080-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/1080-8-0x00000000006F0000-0x0000000000703000-memory.dmp

    Filesize

    76KB

  • memory/1080-7-0x0000000000400000-0x0000000000437000-memory.dmp

    Filesize

    220KB

  • memory/2380-46-0x0000000002F10000-0x0000000002F20000-memory.dmp

    Filesize

    64KB

  • memory/2380-42-0x0000000002F10000-0x0000000002F20000-memory.dmp

    Filesize

    64KB

  • memory/2380-22-0x0000000002C00000-0x0000000002E0F000-memory.dmp

    Filesize

    2.1MB

  • memory/2380-14-0x0000000001040000-0x0000000001055000-memory.dmp

    Filesize

    84KB

  • memory/2380-18-0x0000000001040000-0x0000000001055000-memory.dmp

    Filesize

    84KB

  • memory/2380-34-0x0000000002F10000-0x0000000002F20000-memory.dmp

    Filesize

    64KB

  • memory/2380-19-0x0000000001040000-0x0000000001055000-memory.dmp

    Filesize

    84KB

  • memory/2380-52-0x0000000007C00000-0x000000000800B000-memory.dmp

    Filesize

    4.0MB

  • memory/2380-51-0x00000000031E0000-0x00000000031E5000-memory.dmp

    Filesize

    20KB

  • memory/2380-56-0x00000000031F0000-0x00000000031F7000-memory.dmp

    Filesize

    28KB

  • memory/2380-55-0x0000000007C00000-0x000000000800B000-memory.dmp

    Filesize

    4.0MB

  • memory/2380-48-0x00000000031E0000-0x00000000031E5000-memory.dmp

    Filesize

    20KB

  • memory/2380-47-0x0000000002F10000-0x0000000002F20000-memory.dmp

    Filesize

    64KB

  • memory/2380-24-0x0000000002C00000-0x0000000002E0F000-memory.dmp

    Filesize

    2.1MB

  • memory/2380-45-0x0000000002F10000-0x0000000002F20000-memory.dmp

    Filesize

    64KB

  • memory/2380-44-0x0000000002F10000-0x0000000002F20000-memory.dmp

    Filesize

    64KB

  • memory/2380-43-0x0000000002F10000-0x0000000002F20000-memory.dmp

    Filesize

    64KB

  • memory/2380-25-0x00000000011F0000-0x00000000011F6000-memory.dmp

    Filesize

    24KB

  • memory/2380-41-0x0000000002F10000-0x0000000002F20000-memory.dmp

    Filesize

    64KB

  • memory/2380-40-0x0000000002F10000-0x0000000002F20000-memory.dmp

    Filesize

    64KB

  • memory/2380-39-0x0000000002F10000-0x0000000002F20000-memory.dmp

    Filesize

    64KB

  • memory/2380-38-0x0000000002F10000-0x0000000002F20000-memory.dmp

    Filesize

    64KB

  • memory/2380-37-0x0000000002F10000-0x0000000002F20000-memory.dmp

    Filesize

    64KB

  • memory/2380-36-0x0000000002F10000-0x0000000002F20000-memory.dmp

    Filesize

    64KB

  • memory/2380-35-0x0000000002F10000-0x0000000002F20000-memory.dmp

    Filesize

    64KB

  • memory/2380-33-0x0000000002F10000-0x0000000002F20000-memory.dmp

    Filesize

    64KB

  • memory/2380-32-0x0000000002F10000-0x0000000002F20000-memory.dmp

    Filesize

    64KB

  • memory/2380-31-0x0000000002F10000-0x0000000002F20000-memory.dmp

    Filesize

    64KB

  • memory/2380-28-0x0000000002F10000-0x0000000002F20000-memory.dmp

    Filesize

    64KB

  • memory/3344-11-0x0000000000400000-0x0000000000437000-memory.dmp

    Filesize

    220KB

  • memory/3344-12-0x0000000000400000-0x0000000000437000-memory.dmp

    Filesize

    220KB

  • memory/3344-16-0x0000000000400000-0x0000000000437000-memory.dmp

    Filesize

    220KB

  • memory/3344-13-0x0000000000400000-0x0000000000437000-memory.dmp

    Filesize

    220KB