Overview

overview

10

Static

static

3

cryptolaemus

windows10-2004-x64

10

cryptolaemus

windows11-21h2-x64

10

Analysis

  • max time kernel
    147s
  • max time network
    154s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240802-en
  • resource tags

    arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    06-09-2024 14:17

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General

  • Target

    c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.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
  • 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
  • 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\c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe
    "C:\Users\Admin\AppData\Local\Temp\c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:860
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\nuhubwum\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2248
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jhwexnie.exe" C:\Windows\SysWOW64\nuhubwum\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4584
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create nuhubwum binPath= "C:\Windows\SysWOW64\nuhubwum\jhwexnie.exe /d\"C:\Users\Admin\AppData\Local\Temp\c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3028
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description nuhubwum "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3076
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start nuhubwum
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4136
    • 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:756
  • C:\Windows\SysWOW64\nuhubwum\jhwexnie.exe
    C:\Windows\SysWOW64\nuhubwum\jhwexnie.exe /d"C:\Users\Admin\AppData\Local\Temp\c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:104
    • 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:2080

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

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\jhwexnie.exe
    Filesize

    11.6MB

    MD5

    52cb9affbfeaca16f3625cce5984cf6a

    SHA1

    57819342374678b42a7d36d7de3c1b0c88d53a09

    SHA256

    77db18fb5ea930565f5dd8b8aba162cb6dc7d7154f2463155342557ada4e77c1

    SHA512

    bb61b80b7753016d3455374dbf5df376324bb2fe8c50a8e9fcf358af7edc20fa5fb2137bf7b6ea49b8374b8aff46d7a1ad36944da2873679a623245ee3975292

    Download Submit

  • memory/104-14-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

    Download

  • memory/860-2-0x0000000002290000-0x00000000022A3000-memory.dmp

    Filesize

    76KB

    Download

  • memory/860-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

    Download

  • memory/860-7-0x00000000006F0000-0x00000000007F0000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/860-1-0x00000000006F0000-0x00000000007F0000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/860-11-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

    Download

  • memory/860-12-0x0000000002290000-0x00000000022A3000-memory.dmp

    Filesize

    76KB

    Download

  • memory/860-13-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2080-48-0x0000000002DD0000-0x0000000002DD5000-memory.dmp

    Filesize

    20KB

    Download

  • memory/2080-42-0x00000000021F0000-0x0000000002200000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2080-17-0x0000000000C70000-0x0000000000C85000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2080-56-0x0000000002DE0000-0x0000000002DE7000-memory.dmp

    Filesize

    28KB

    Download

  • memory/2080-41-0x00000000021F0000-0x0000000002200000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2080-21-0x0000000002A00000-0x0000000002C0F000-memory.dmp

    Filesize

    2.1MB

    Download

  • memory/2080-55-0x0000000007900000-0x0000000007D0B000-memory.dmp

    Filesize

    4.0MB

    Download

  • memory/2080-52-0x0000000007900000-0x0000000007D0B000-memory.dmp

    Filesize

    4.0MB

    Download

  • memory/2080-51-0x0000000002DD0000-0x0000000002DD5000-memory.dmp

    Filesize

    20KB

    Download

  • memory/2080-9-0x0000000000C70000-0x0000000000C85000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2080-47-0x00000000021F0000-0x0000000002200000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2080-46-0x00000000021F0000-0x0000000002200000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2080-45-0x00000000021F0000-0x0000000002200000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2080-44-0x00000000021F0000-0x0000000002200000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2080-43-0x00000000021F0000-0x0000000002200000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2080-16-0x0000000000C70000-0x0000000000C85000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2080-40-0x00000000021F0000-0x0000000002200000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2080-39-0x00000000021F0000-0x0000000002200000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2080-38-0x00000000021F0000-0x0000000002200000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2080-37-0x00000000021F0000-0x0000000002200000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2080-36-0x00000000021F0000-0x0000000002200000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2080-35-0x00000000021F0000-0x0000000002200000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2080-34-0x00000000021F0000-0x0000000002200000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2080-33-0x00000000021F0000-0x0000000002200000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2080-32-0x00000000021F0000-0x0000000002200000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2080-31-0x00000000021F0000-0x0000000002200000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2080-28-0x00000000021F0000-0x0000000002200000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2080-24-0x0000000002A00000-0x0000000002C0F000-memory.dmp

    Filesize

    2.1MB

    Download

  • memory/2080-25-0x0000000000DF0000-0x0000000000DF6000-memory.dmp

    Filesize

    24KB

    Download