Analysis

  • max time kernel
    143s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-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.

  • 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 6 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\6144c9369be2e903bdd67a73d031dac6e9edf69d54956ce1de82749ad4c0759f.exe
    "C:\Users\Admin\AppData\Local\Temp\6144c9369be2e903bdd67a73d031dac6e9edf69d54956ce1de82749ad4c0759f.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2132
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\tkrvaqah\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2084
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\dpbgdjiw.exe" C:\Windows\SysWOW64\tkrvaqah\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2368
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create tkrvaqah binPath= "C:\Windows\SysWOW64\tkrvaqah\dpbgdjiw.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:2272
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description tkrvaqah "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2736
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start tkrvaqah
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2900
    • 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:2640
  • C:\Windows\SysWOW64\tkrvaqah\dpbgdjiw.exe
    C:\Windows\SysWOW64\tkrvaqah\dpbgdjiw.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:2760
    • 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:2944

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    10.5MB

    MD5

    2ccd0b1b0de30cb83f35f5cbd637f303

    SHA1

    0d8443b4a74a31111ba810386ef82114eed8ec23

    SHA256

    cb2e81d4f49ae21903bd2bfac98964e547109953cf136d2e9547808128b6c24d

    SHA512

    318316447f34f7638f7af5d1fcaebd29b3cef450fe0813e3ef7293e81744a617fed6c2219e385c67261c45dcc6fb944ad870491c570f7f917ddd5898ef93d4ed

  • memory/2132-3-0x0000000000400000-0x0000000000437000-memory.dmp

    Filesize

    220KB

  • memory/2132-2-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2132-1-0x00000000002B0000-0x00000000003B0000-memory.dmp

    Filesize

    1024KB

  • memory/2132-16-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2132-15-0x0000000000400000-0x0000000000437000-memory.dmp

    Filesize

    220KB

  • memory/2760-12-0x0000000000400000-0x0000000000437000-memory.dmp

    Filesize

    220KB

  • memory/2944-47-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2944-46-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2944-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2944-17-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2944-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2944-21-0x0000000001C40000-0x0000000001E4F000-memory.dmp

    Filesize

    2.1MB

  • memory/2944-28-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2944-25-0x00000000000A0000-0x00000000000A6000-memory.dmp

    Filesize

    24KB

  • memory/2944-24-0x0000000001C40000-0x0000000001E4F000-memory.dmp

    Filesize

    2.1MB

  • memory/2944-31-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2944-36-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2944-8-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2944-52-0x0000000005760000-0x0000000005B6B000-memory.dmp

    Filesize

    4.0MB

  • memory/2944-51-0x00000000000C0000-0x00000000000C5000-memory.dmp

    Filesize

    20KB

  • memory/2944-48-0x00000000000C0000-0x00000000000C5000-memory.dmp

    Filesize

    20KB

  • memory/2944-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2944-45-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2944-44-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2944-43-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2944-42-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2944-41-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2944-40-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2944-39-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2944-38-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2944-37-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2944-35-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2944-34-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2944-33-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2944-32-0x00000000000B0000-0x00000000000C0000-memory.dmp

    Filesize

    64KB

  • memory/2944-56-0x00000000000E0000-0x00000000000E7000-memory.dmp

    Filesize

    28KB

  • memory/2944-55-0x0000000005760000-0x0000000005B6B000-memory.dmp

    Filesize

    4.0MB