Overview

overview

10

Static

static

3

36b524a7a3...f1.exe

windows7-x64

10

36b524a7a3...f1.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05-09-2024 17:59

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General

  • Target

    36b524a7a3b444ebe042a71bcd6fab2a615371e036a8c6a3514e78dc2c9445f1.exe

  • Size

    399KB

  • MD5

    05b66bfebe0f44b1eb15ede797adbecd

  • SHA1

    6a9227f4cdc2cd60f594ccf4a265a39bea7bdeab

  • SHA256

    36b524a7a3b444ebe042a71bcd6fab2a615371e036a8c6a3514e78dc2c9445f1

  • SHA512

    1cae3a1419d42c0b131e475549731d4e37cb64e9e945451308bca32f1667ef4621ab8aeaf794f66b6a9e510c1368aa6fafdd52c6dd618e2afddaff043c877517

  • SSDEEP

    6144:0Epz3ZfyHfWBmYALwRzU3EHHxdzJF0PwVFdgiR4i/OP3A:0Epz3ZfyHfWB7o3EHRdFFwEOc48

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.

  • 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\36b524a7a3b444ebe042a71bcd6fab2a615371e036a8c6a3514e78dc2c9445f1.exe
    "C:\Users\Admin\AppData\Local\Temp\36b524a7a3b444ebe042a71bcd6fab2a615371e036a8c6a3514e78dc2c9445f1.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2752
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xjcveatw\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1016
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zltqwjpn.exe" C:\Windows\SysWOW64\xjcveatw\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1484
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create xjcveatw binPath= "C:\Windows\SysWOW64\xjcveatw\zltqwjpn.exe /d\"C:\Users\Admin\AppData\Local\Temp\36b524a7a3b444ebe042a71bcd6fab2a615371e036a8c6a3514e78dc2c9445f1.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1760
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description xjcveatw "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3980
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start xjcveatw
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3596
    • 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:628
  • C:\Windows\SysWOW64\xjcveatw\zltqwjpn.exe
    C:\Windows\SysWOW64\xjcveatw\zltqwjpn.exe /d"C:\Users\Admin\AppData\Local\Temp\36b524a7a3b444ebe042a71bcd6fab2a615371e036a8c6a3514e78dc2c9445f1.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3532
    • 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:4232

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

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Downloads

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

    14.7MB

    MD5

    980fbc6602c8de0a981dcb328d2e40b2

    SHA1

    128e46580e4576f3bf3045e833a67b0df3b113bc

    SHA256

    84ee083eb321a89d0d0796e823791c6424198912d22866637cfc758294af23fc

    SHA512

    b38bedb38c9bda7d61c114fb3889437888a49744c813913bd1986af3f8946787103410c2754abad42144cc032a8c9ce00d6b6e74a0ebd1f8d92b917cfce4463e

    Download Submit

  • memory/2752-2-0x0000000002340000-0x0000000002353000-memory.dmp

    Filesize

    76KB

    Download

  • memory/2752-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2752-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2752-8-0x0000000002340000-0x0000000002353000-memory.dmp

    Filesize

    76KB

    Download

  • memory/2752-7-0x0000000000400000-0x00000000005F8000-memory.dmp

    Filesize

    2.0MB

    Download

  • memory/2752-1-0x0000000000710000-0x0000000000810000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/3532-12-0x0000000000400000-0x00000000005F8000-memory.dmp

    Filesize

    2.0MB

    Download

  • memory/3532-11-0x0000000000400000-0x00000000005F8000-memory.dmp

    Filesize

    2.0MB

    Download

  • memory/3532-13-0x0000000000400000-0x00000000005F8000-memory.dmp

    Filesize

    2.0MB

    Download

  • memory/3532-18-0x0000000000400000-0x00000000005F8000-memory.dmp

    Filesize

    2.0MB

    Download

  • memory/4232-46-0x0000000001780000-0x0000000001790000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4232-39-0x0000000001780000-0x0000000001790000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4232-19-0x00000000001B0000-0x00000000001C5000-memory.dmp

    Filesize

    84KB

    Download

  • memory/4232-48-0x00000000017D0000-0x00000000017D5000-memory.dmp

    Filesize

    20KB

    Download

  • memory/4232-52-0x0000000007000000-0x000000000740B000-memory.dmp

    Filesize

    4.0MB

    Download

  • memory/4232-55-0x0000000007000000-0x000000000740B000-memory.dmp

    Filesize

    4.0MB

    Download

  • memory/4232-56-0x00000000017E0000-0x00000000017E7000-memory.dmp

    Filesize

    28KB

    Download

  • memory/4232-51-0x00000000017D0000-0x00000000017D5000-memory.dmp

    Filesize

    20KB

    Download

  • memory/4232-47-0x0000000001780000-0x0000000001790000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4232-14-0x00000000001B0000-0x00000000001C5000-memory.dmp

    Filesize

    84KB

    Download

  • memory/4232-45-0x0000000001780000-0x0000000001790000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4232-44-0x0000000001780000-0x0000000001790000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4232-42-0x0000000001780000-0x0000000001790000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4232-41-0x0000000001780000-0x0000000001790000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4232-40-0x0000000001780000-0x0000000001790000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4232-17-0x00000000001B0000-0x00000000001C5000-memory.dmp

    Filesize

    84KB

    Download

  • memory/4232-38-0x0000000001780000-0x0000000001790000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4232-37-0x0000000001780000-0x0000000001790000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4232-36-0x0000000001780000-0x0000000001790000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4232-35-0x0000000001780000-0x0000000001790000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4232-34-0x0000000001780000-0x0000000001790000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4232-33-0x0000000001780000-0x0000000001790000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4232-32-0x0000000001780000-0x0000000001790000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4232-31-0x0000000001780000-0x0000000001790000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4232-28-0x0000000001780000-0x0000000001790000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4232-25-0x0000000001770000-0x0000000001776000-memory.dmp

    Filesize

    24KB

    Download

  • memory/4232-24-0x0000000002000000-0x000000000220F000-memory.dmp

    Filesize

    2.1MB

    Download

  • memory/4232-43-0x0000000001780000-0x0000000001790000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4232-21-0x0000000002000000-0x000000000220F000-memory.dmp

    Filesize

    2.1MB

    Download