Overview

overview

10

Static

static

3

938bdaad40...b3.exe

windows7-x64

10

938bdaad40...b3.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06-09-2024 10:57

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General

  • Target

    938bdaad404914635b4acc4510fe1121b28c2131aeaa308783c3588e628347b3.exe

  • Size

    213KB

  • MD5

    4b549fa8c31524128d8ad39c341adc12

  • SHA1

    8679f2cd0dc019eb40cf6adf54d033092c844fef

  • SHA256

    938bdaad404914635b4acc4510fe1121b28c2131aeaa308783c3588e628347b3

  • SHA512

    9eb6d5ab732285eb7888b4714110fdc709e48400c09a3e9c6e64caf3fec3c82b6793d8de3761f72367487552f0c7dba725345ed10998583216d46a39f99dab74

  • SSDEEP

    6144:/zDXnqPnz5H7Mh27ROOSxJ/z/MB0Vdh1GQ:/nXq/z5H7Mho38/rVdz

Score
10/10
tofseediscoveryevasionexecutionpersistenceprivilege_escalationtrojan

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.

    trojantofsee
  • Creates new service(s) 2 TTPs
    persistenceexecution
  • Modifies Windows Firewall 2 TTPs 1 IoCs
    evasion
  • Sets service image path in registry 2 TTPs 1 IoCs
    persistence
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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.

    persistenceprivilege_escalation
  • 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.

    discovery
  • Modifies data under HKEY_USERS 6 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\938bdaad404914635b4acc4510fe1121b28c2131aeaa308783c3588e628347b3.exe
    "C:\Users\Admin\AppData\Local\Temp\938bdaad404914635b4acc4510fe1121b28c2131aeaa308783c3588e628347b3.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1676
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rmxzexol\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1384
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gnqlkeey.exe" C:\Windows\SysWOW64\rmxzexol\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4948
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create rmxzexol binPath= "C:\Windows\SysWOW64\rmxzexol\gnqlkeey.exe /d\"C:\Users\Admin\AppData\Local\Temp\938bdaad404914635b4acc4510fe1121b28c2131aeaa308783c3588e628347b3.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3032
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description rmxzexol "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:552
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start rmxzexol
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1720
    • 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:5084
  • C:\Windows\SysWOW64\rmxzexol\gnqlkeey.exe
    C:\Windows\SysWOW64\rmxzexol\gnqlkeey.exe /d"C:\Users\Admin\AppData\Local\Temp\938bdaad404914635b4acc4510fe1121b28c2131aeaa308783c3588e628347b3.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2084
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Drops file in System32 directory
      • System Location Discovery: System Language Discovery
      • Modifies data under HKEY_USERS
      PID:4836

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

1
T1569

Service Execution

1
T1569.002

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Event Triggered Execution

1
T1546

Netsh Helper DLL

1
T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Event Triggered Execution

1
T1546

Netsh Helper DLL

1
T1546.007

Defense Evasion

Impair Defenses

1
T1562

Disable or Modify System Firewall

1
T1562.004

Modify Registry

1
T1112

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\gnqlkeey.exe
    Filesize

    13.6MB

    MD5

    76f5c2c074078fcc0a2647af1608afd5

    SHA1

    225ee7e4c4d501cf4386c276d954eac264c9a7ee

    SHA256

    2c2d74cb7b4034b5c085f01de806695867c2e0213cc98dc39721de4afb35fe67

    SHA512

    48ca02758b6e910007072276351282363a5661483c19bc5ccdba4c963da8484a8ea353f8b56f602432467d4fd1b074602196df81d3580670f048e3a6de2f6d0b

    Download Submit

  • memory/1676-2-0x00000000004C0000-0x00000000004D3000-memory.dmp

    Filesize

    76KB

    Download

  • memory/1676-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

    Download

  • memory/1676-8-0x00000000005A0000-0x00000000006A0000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/1676-1-0x00000000005A0000-0x00000000006A0000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/1676-13-0x00000000004C0000-0x00000000004D3000-memory.dmp

    Filesize

    76KB

    Download

  • memory/1676-12-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

    Download

  • memory/1676-14-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2084-15-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

    Download

  • memory/2084-9-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

    Download

  • memory/4836-52-0x00000000021E0000-0x00000000021E5000-memory.dmp

    Filesize

    20KB

    Download

  • memory/4836-43-0x0000000000FF0000-0x0000000001000000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4836-17-0x0000000000CC0000-0x0000000000CD5000-memory.dmp

    Filesize

    84KB

    Download

  • memory/4836-25-0x0000000002A00000-0x0000000002C0F000-memory.dmp

    Filesize

    2.1MB

    Download

  • memory/4836-22-0x0000000002A00000-0x0000000002C0F000-memory.dmp

    Filesize

    2.1MB

    Download

  • memory/4836-29-0x0000000000FF0000-0x0000000001000000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4836-57-0x00000000021F0000-0x00000000021F7000-memory.dmp

    Filesize

    28KB

    Download

  • memory/4836-53-0x0000000007900000-0x0000000007D0B000-memory.dmp

    Filesize

    4.0MB

    Download

  • memory/4836-10-0x0000000000CC0000-0x0000000000CD5000-memory.dmp

    Filesize

    84KB

    Download

  • memory/4836-49-0x00000000021E0000-0x00000000021E5000-memory.dmp

    Filesize

    20KB

    Download

  • memory/4836-48-0x0000000000FF0000-0x0000000001000000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4836-47-0x0000000000FF0000-0x0000000001000000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4836-46-0x0000000000FF0000-0x0000000001000000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4836-45-0x0000000000FF0000-0x0000000001000000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4836-44-0x0000000000FF0000-0x0000000001000000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4836-16-0x0000000000CC0000-0x0000000000CD5000-memory.dmp

    Filesize

    84KB

    Download

  • memory/4836-40-0x0000000000FF0000-0x0000000001000000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4836-41-0x0000000000FF0000-0x0000000001000000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4836-26-0x0000000000F50000-0x0000000000F56000-memory.dmp

    Filesize

    24KB

    Download

  • memory/4836-56-0x0000000007900000-0x0000000007D0B000-memory.dmp

    Filesize

    4.0MB

    Download

  • memory/4836-42-0x0000000000FF0000-0x0000000001000000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4836-39-0x0000000000FF0000-0x0000000001000000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4836-38-0x0000000000FF0000-0x0000000001000000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4836-37-0x0000000000FF0000-0x0000000001000000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4836-36-0x0000000000FF0000-0x0000000001000000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4836-35-0x0000000000FF0000-0x0000000001000000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4836-34-0x0000000000FF0000-0x0000000001000000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4836-33-0x0000000000FF0000-0x0000000001000000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4836-32-0x0000000000FF0000-0x0000000001000000-memory.dmp

    Filesize

    64KB

    Download