Analysis

  • max time kernel
    149s
  • max time network
    147s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    04-09-2024 07:24

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:2884
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qvynlkph\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2132
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\tcitrgy.exe" C:\Windows\SysWOW64\qvynlkph\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2804
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create qvynlkph binPath= "C:\Windows\SysWOW64\qvynlkph\tcitrgy.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:3012
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description qvynlkph "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2644
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start qvynlkph
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1244
    • 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:476
  • C:\Windows\SysWOW64\qvynlkph\tcitrgy.exe
    C:\Windows\SysWOW64\qvynlkph\tcitrgy.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:2660
    • 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:1920

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    12.2MB

    MD5

    70927c0c687bb04fb81293c953c1c266

    SHA1

    6b35a6fa0f21f2c47491eff19c59013171394210

    SHA256

    a62e3b6cfe6d45a0a8ad188f7267da6b3ad766bb27d9602faab4db1f84262b7e

    SHA512

    4a4b881a221aede49b523814f76d05dbd436d05f536cc39f740a8015593a8e5ecefb83701057227aeb2d949fffe2845767b13472f52ee9774dd015288bdb964d

  • memory/1920-42-0x00000000001F0000-0x0000000000200000-memory.dmp

    Filesize

    64KB

  • memory/1920-30-0x00000000001F0000-0x0000000000200000-memory.dmp

    Filesize

    64KB

  • memory/1920-54-0x0000000005380000-0x000000000578B000-memory.dmp

    Filesize

    4.0MB

  • memory/1920-11-0x0000000000120000-0x0000000000135000-memory.dmp

    Filesize

    84KB

  • memory/1920-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/1920-8-0x0000000000120000-0x0000000000135000-memory.dmp

    Filesize

    84KB

  • memory/1920-55-0x0000000000270000-0x0000000000277000-memory.dmp

    Filesize

    28KB

  • memory/1920-31-0x00000000001F0000-0x0000000000200000-memory.dmp

    Filesize

    64KB

  • memory/1920-50-0x0000000000260000-0x0000000000265000-memory.dmp

    Filesize

    20KB

  • memory/1920-32-0x00000000001F0000-0x0000000000200000-memory.dmp

    Filesize

    64KB

  • memory/1920-17-0x0000000000120000-0x0000000000135000-memory.dmp

    Filesize

    84KB

  • memory/1920-18-0x0000000000120000-0x0000000000135000-memory.dmp

    Filesize

    84KB

  • memory/1920-27-0x00000000001F0000-0x0000000000200000-memory.dmp

    Filesize

    64KB

  • memory/1920-20-0x00000000019A0000-0x0000000001BAF000-memory.dmp

    Filesize

    2.1MB

  • memory/1920-24-0x00000000000D0000-0x00000000000D6000-memory.dmp

    Filesize

    24KB

  • memory/1920-35-0x00000000001F0000-0x0000000000200000-memory.dmp

    Filesize

    64KB

  • memory/1920-23-0x00000000019A0000-0x0000000001BAF000-memory.dmp

    Filesize

    2.1MB

  • memory/1920-33-0x00000000001F0000-0x0000000000200000-memory.dmp

    Filesize

    64KB

  • memory/1920-34-0x00000000001F0000-0x0000000000200000-memory.dmp

    Filesize

    64KB

  • memory/1920-36-0x00000000001F0000-0x0000000000200000-memory.dmp

    Filesize

    64KB

  • memory/1920-43-0x00000000001F0000-0x0000000000200000-memory.dmp

    Filesize

    64KB

  • memory/1920-47-0x0000000000260000-0x0000000000265000-memory.dmp

    Filesize

    20KB

  • memory/1920-46-0x00000000001F0000-0x0000000000200000-memory.dmp

    Filesize

    64KB

  • memory/1920-45-0x00000000001F0000-0x0000000000200000-memory.dmp

    Filesize

    64KB

  • memory/1920-44-0x00000000001F0000-0x0000000000200000-memory.dmp

    Filesize

    64KB

  • memory/1920-51-0x0000000005380000-0x000000000578B000-memory.dmp

    Filesize

    4.0MB

  • memory/1920-37-0x00000000001F0000-0x0000000000200000-memory.dmp

    Filesize

    64KB

  • memory/1920-41-0x00000000001F0000-0x0000000000200000-memory.dmp

    Filesize

    64KB

  • memory/1920-40-0x00000000001F0000-0x0000000000200000-memory.dmp

    Filesize

    64KB

  • memory/1920-39-0x00000000001F0000-0x0000000000200000-memory.dmp

    Filesize

    64KB

  • memory/1920-38-0x00000000001F0000-0x0000000000200000-memory.dmp

    Filesize

    64KB

  • memory/2660-13-0x0000000000400000-0x0000000000437000-memory.dmp

    Filesize

    220KB

  • memory/2884-1-0x0000000000520000-0x0000000000620000-memory.dmp

    Filesize

    1024KB

  • memory/2884-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2884-16-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2884-15-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/2884-14-0x0000000000400000-0x0000000000437000-memory.dmp

    Filesize

    220KB

  • memory/2884-2-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB