Overview

overview

10

Static

static

3

RSno9EH0K9.exe

windows7-x64

10

RSno9EH0K9.exe

windows10-1703-x64

10

RSno9EH0K9.exe

windows10-2004-x64

10

RSno9EH0K9.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    156s
  • platform
    windows10-1703_x64
  • resource
    win10-20240611-en
  • resource tags

    arch:x64arch:x86image:win10-20240611-enlocale:en-usos:windows10-1703-x64system
  • submitted
    06/09/2024, 14:16

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General

  • Target

    RSno9EH0K9.exe

  • Size

    213KB

  • MD5

    8e456f932787fcd0cadbb598174575b2

  • SHA1

    22b069c76b86bdb6be8cdafc78019b55c583062e

  • SHA256

    c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5

  • SHA512

    cb26a33dacdcfe804bdd587ecd44b9bf1c59f357e8701fc4f5e1b04d8d8882466c7743fac51969fe8912e1197a5653986eb4a71edc35eee89051b6c98d546c9d

  • SSDEEP

    6144:MGDLD6Tj3Vyg0mwiRjaVlodEFjvn/Mq0Vdh1HQ:M+L2n3VygtzRWJjv+Vdz

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
  • Windows security bypass 2 TTPs 1 IoCs
    evasiontrojan
  • 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
  • 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.

    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 7 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\RSno9EH0K9.exe
    "C:\Users\Admin\AppData\Local\Temp\RSno9EH0K9.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4816
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kvhhtmlz\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4772
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gwwtfrhf.exe" C:\Windows\SysWOW64\kvhhtmlz\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4584
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create kvhhtmlz binPath= "C:\Windows\SysWOW64\kvhhtmlz\gwwtfrhf.exe /d\"C:\Users\Admin\AppData\Local\Temp\RSno9EH0K9.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2560
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description kvhhtmlz "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4324
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start kvhhtmlz
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4976
    • 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:4764
  • C:\Windows\SysWOW64\kvhhtmlz\gwwtfrhf.exe
    C:\Windows\SysWOW64\kvhhtmlz\gwwtfrhf.exe /d"C:\Users\Admin\AppData\Local\Temp\RSno9EH0K9.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4720
    • 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:1976

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

2
T1562

Disable or Modify System Firewall

1
T1562.004

Disable or Modify Tools

1
T1562.001

Modify Registry

2
T1112

Credential Access

Discovery

System Information Discovery

1
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\gwwtfrhf.exe
    Filesize

    13.1MB

    MD5

    a85db5a7c1e49fad319c870ebb3e20bf

    SHA1

    3ba2ec1fe8547452984f229c72f0d2295973151b

    SHA256

    a495b1ecefca8b75b07ccce0b5a588adcc2e48308bfcc7e37f4dfba3502a6433

    SHA512

    70a8684f359a2aa2caa8c5a0809d6cb44b06860606bb81af066e1e774b2ed9ea007a4a0a97f1ab00ba413982159483525865dae9b59436b53d60b0075a99de76

    Download Submit

  • memory/1976-42-0x00000000007A0000-0x00000000007B0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1976-34-0x00000000007A0000-0x00000000007B0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1976-23-0x0000000000790000-0x0000000000796000-memory.dmp

    Filesize

    24KB

    Download

  • memory/1976-22-0x0000000004140000-0x000000000434F000-memory.dmp

    Filesize

    2.1MB

    Download

  • memory/1976-26-0x00000000007A0000-0x00000000007B0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1976-50-0x0000000008790000-0x0000000008B9B000-memory.dmp

    Filesize

    4.0MB

    Download

  • memory/1976-11-0x0000000000B50000-0x0000000000B65000-memory.dmp

    Filesize

    84KB

    Download

  • memory/1976-54-0x00000000007C0000-0x00000000007C7000-memory.dmp

    Filesize

    28KB

    Download

  • memory/1976-16-0x0000000000B50000-0x0000000000B65000-memory.dmp

    Filesize

    84KB

    Download

  • memory/1976-17-0x0000000000B50000-0x0000000000B65000-memory.dmp

    Filesize

    84KB

    Download

  • memory/1976-19-0x0000000004140000-0x000000000434F000-memory.dmp

    Filesize

    2.1MB

    Download

  • memory/1976-29-0x00000000007A0000-0x00000000007B0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1976-49-0x00000000007B0000-0x00000000007B5000-memory.dmp

    Filesize

    20KB

    Download

  • memory/1976-46-0x00000000007B0000-0x00000000007B5000-memory.dmp

    Filesize

    20KB

    Download

  • memory/1976-45-0x00000000007A0000-0x00000000007B0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1976-44-0x00000000007A0000-0x00000000007B0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1976-53-0x0000000008790000-0x0000000008B9B000-memory.dmp

    Filesize

    4.0MB

    Download

  • memory/1976-30-0x00000000007A0000-0x00000000007B0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1976-31-0x00000000007A0000-0x00000000007B0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1976-40-0x00000000007A0000-0x00000000007B0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1976-39-0x00000000007A0000-0x00000000007B0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1976-38-0x00000000007A0000-0x00000000007B0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1976-37-0x00000000007A0000-0x00000000007B0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1976-36-0x00000000007A0000-0x00000000007B0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1976-35-0x00000000007A0000-0x00000000007B0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1976-43-0x00000000007A0000-0x00000000007B0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1976-33-0x00000000007A0000-0x00000000007B0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1976-32-0x00000000007A0000-0x00000000007B0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1976-41-0x00000000007A0000-0x00000000007B0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4720-14-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

    Download

  • memory/4816-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

    Download

  • memory/4816-1-0x0000000000690000-0x0000000000790000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/4816-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

    Download

  • memory/4816-8-0x0000000001F30000-0x0000000001F43000-memory.dmp

    Filesize

    76KB

    Download

  • memory/4816-7-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

    Download

  • memory/4816-2-0x0000000001F30000-0x0000000001F43000-memory.dmp

    Filesize

    76KB

    Download