Analysis

  • max time kernel
    57s
  • max time network
    64s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    13-10-2024 19:46

General

  • Target

    79304d3709f4266d76e318d24d5863b3cc14a8fb64bc02145fbf23d398803753.exe

  • Size

    237KB

  • MD5

    e180178b04f30c79a29231d10dbf3549

  • SHA1

    31dec58acfcbf1f9b60a53ca6a0e589123106450

  • SHA256

    79304d3709f4266d76e318d24d5863b3cc14a8fb64bc02145fbf23d398803753

  • SHA512

    7036bcead8bcbaa1e40158b78cdcf5fa137f14a330670bfafca807c237eb4779a35a81a0be78c8a10358346a3adb60a737ca3e4699660f6117b36b470c6d6e9f

  • SSDEEP

    3072:ALEeqY70pT7Ov4epeBWsj5zEqONJUFqQj1yw7:ALEHRpT7cxM1XFE

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
  • 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 5 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\79304d3709f4266d76e318d24d5863b3cc14a8fb64bc02145fbf23d398803753.exe
    "C:\Users\Admin\AppData\Local\Temp\79304d3709f4266d76e318d24d5863b3cc14a8fb64bc02145fbf23d398803753.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2596
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\btchrpvx\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2304
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\lhshsauf.exe" C:\Windows\SysWOW64\btchrpvx\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2432
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create btchrpvx binPath= "C:\Windows\SysWOW64\btchrpvx\lhshsauf.exe /d\"C:\Users\Admin\AppData\Local\Temp\79304d3709f4266d76e318d24d5863b3cc14a8fb64bc02145fbf23d398803753.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2312
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description btchrpvx "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1940
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start btchrpvx
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2664
    • 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:2776
  • C:\Windows\SysWOW64\btchrpvx\lhshsauf.exe
    C:\Windows\SysWOW64\btchrpvx\lhshsauf.exe /d"C:\Users\Admin\AppData\Local\Temp\79304d3709f4266d76e318d24d5863b3cc14a8fb64bc02145fbf23d398803753.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2724
    • 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:2648

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    13.2MB

    MD5

    8698d80c19c9ad88493ad1e5cb02414f

    SHA1

    5fd876e21d2d04743d6c8bea6345c9c7f65137e5

    SHA256

    88803bda427055b8883a3de5b7fef39f547aebb245464138d5a6245f81dce9dd

    SHA512

    d88a03190d048c49b66c80ccdd434722ca6614cdd80e6800c5e2ef805d832cbf3dcce72e6016ba7f063c3623ea478937dda7c49fcec328462ef5581b3a1cf9b0

  • memory/2596-1-0x00000000002F0000-0x00000000003F0000-memory.dmp

    Filesize

    1024KB

  • memory/2596-2-0x00000000001E0000-0x00000000001F3000-memory.dmp

    Filesize

    76KB

  • memory/2596-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2596-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2596-8-0x00000000001E0000-0x00000000001F3000-memory.dmp

    Filesize

    76KB

  • memory/2596-7-0x0000000000400000-0x0000000002B3E000-memory.dmp

    Filesize

    39.2MB

  • memory/2648-50-0x00000000000E0000-0x00000000000E5000-memory.dmp

    Filesize

    20KB

  • memory/2648-44-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2648-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2648-17-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2648-54-0x0000000005580000-0x000000000598B000-memory.dmp

    Filesize

    4.0MB

  • memory/2648-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2648-20-0x0000000001890000-0x0000000001A9F000-memory.dmp

    Filesize

    2.1MB

  • memory/2648-27-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2648-24-0x00000000000A0000-0x00000000000A6000-memory.dmp

    Filesize

    24KB

  • memory/2648-23-0x0000000001890000-0x0000000001A9F000-memory.dmp

    Filesize

    2.1MB

  • memory/2648-37-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2648-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2648-47-0x00000000000E0000-0x00000000000E5000-memory.dmp

    Filesize

    20KB

  • memory/2648-46-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2648-45-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2648-14-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2648-43-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2648-42-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2648-41-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2648-40-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2648-39-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2648-38-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2648-36-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2648-35-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2648-34-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2648-33-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2648-32-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2648-31-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2648-30-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2648-51-0x0000000005580000-0x000000000598B000-memory.dmp

    Filesize

    4.0MB

  • memory/2648-55-0x0000000000130000-0x0000000000137000-memory.dmp

    Filesize

    28KB

  • memory/2724-15-0x0000000000400000-0x0000000002B3E000-memory.dmp

    Filesize

    39.2MB