tofsee | b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf

Analysis

max time kernel
150s
max time network
158s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
04/09/2024, 02:10

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe
Size

11.6MB
MD5

fed6d9f141d4ac6b3388a2c90722bd62
SHA1

3480f699c94d4a520c8d92dfd2f6c84d5bd9668b
SHA256

b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf
SHA512

f678216084e177bc51879d697f6e4201449874ed1c6f4c41fc1cb62aecf8ed5c3ab17784c1d30c481ee99c727fe0a29cd2854bdcaf554b3da425d59b5e957719
SSDEEP

6144:rc6OZDisWsD0Td2HJxO+m8PuG1R4WnWjrsaz:r1OZDisvwdaxO0PuG1R4CWs

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

vanaheim.cn

jotunheim.name

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee

Windows security bypass 2 TTPs 1 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\objvakwk = "0"	svchost.exe

Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
2760	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\objvakwk\ImagePath = "C:\\Windows\\SysWOW64\\objvakwk\\htbyerxv.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
1656	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2936	htbyerxv.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile:.repos	svchost.exe
File created	C:\Windows\SysWOW64\config\systemprofile:.repos	svchost.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2936 set thread context of 1656	2936	htbyerxv.exe	43

Launches sc.exe 3 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
2648	sc.exe
2672	sc.exe
2768	sc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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.

persistence privilege_escalation

Netsh Helper DLL

T1546.007

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe

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

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	htbyerxv.exe

Modifies data under HKEY_USERS 3 IoCs

description	ioc	Process
Set value (data)	\REGISTRY\USER\.DEFAULT\Control Panel\Buses\Config0 = 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	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Control Panel\Buses	svchost.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Control Panel\Buses\Config0 = 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	svchost.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1988 wrote to memory of 2236	1988	b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe	30
PID 1988 wrote to memory of 2236	1988	b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe	30
PID 1988 wrote to memory of 2236	1988	b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe	30
PID 1988 wrote to memory of 2236	1988	b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe	30
PID 1988 wrote to memory of 2260	1988	b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe	32
PID 1988 wrote to memory of 2260	1988	b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe	32
PID 1988 wrote to memory of 2260	1988	b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe	32
PID 1988 wrote to memory of 2260	1988	b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe	32
PID 1988 wrote to memory of 2672	1988	b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe	34
PID 1988 wrote to memory of 2672	1988	b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe	34
PID 1988 wrote to memory of 2672	1988	b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe	34
PID 1988 wrote to memory of 2672	1988	b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe	34
PID 1988 wrote to memory of 2768	1988	b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe	36
PID 1988 wrote to memory of 2768	1988	b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe	36
PID 1988 wrote to memory of 2768	1988	b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe	36
PID 1988 wrote to memory of 2768	1988	b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe	36
PID 1988 wrote to memory of 2648	1988	b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe	38
PID 1988 wrote to memory of 2648	1988	b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe	38
PID 1988 wrote to memory of 2648	1988	b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe	38
PID 1988 wrote to memory of 2648	1988	b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe	38
PID 1988 wrote to memory of 2760	1988	b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe	41
PID 1988 wrote to memory of 2760	1988	b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe	41
PID 1988 wrote to memory of 2760	1988	b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe	41
PID 1988 wrote to memory of 2760	1988	b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe	41
PID 2936 wrote to memory of 1656	2936	htbyerxv.exe	43
PID 2936 wrote to memory of 1656	2936	htbyerxv.exe	43
PID 2936 wrote to memory of 1656	2936	htbyerxv.exe	43
PID 2936 wrote to memory of 1656	2936	htbyerxv.exe	43
PID 2936 wrote to memory of 1656	2936	htbyerxv.exe	43
PID 2936 wrote to memory of 1656	2936	htbyerxv.exe	43

C:\Users\Admin\AppData\Local\Temp\b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe
"C:\Users\Admin\AppData\Local\Temp\b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1988
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\objvakwk\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2236
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\htbyerxv.exe" C:\Windows\SysWOW64\objvakwk\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2260
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create objvakwk binPath= "C:\Windows\SysWOW64\objvakwk\htbyerxv.exe /d\"C:\Users\Admin\AppData\Local\Temp\b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2672
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description objvakwk "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2768
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start objvakwk
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2648
- 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:2760

C:\Windows\SysWOW64\objvakwk\htbyerxv.exe
C:\Windows\SysWOW64\objvakwk\htbyerxv.exe /d"C:\Users\Admin\AppData\Local\Temp\b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2936
- 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:1656

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

T1569

Service Execution

T1569.002

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\htbyerxv.exe

Filesize
11.3MB

MD5
8e33e460705d237d3a9e41d52368fc89

SHA1
6a22ea3c0939c7193dfe91427b7dd2ac58cf1684

SHA256
3faac830f618b737857a1c01310ea51f0895396cf33fb8b2683618431d079391

SHA512
5bc23b27c22654580230a9b5a82a6713ba0bd83c49c927dd256e6f172e5ef31457bfac2ddf1fb020cf7eaff48d2e9ff9a4bcc2aefbdfc1e0acae8d40927d1372

Download Submit
memory/1656-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1656-17-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1656-14-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1656-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1656-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1988-1-0x00000000006C0000-0x00000000007C0000-memory.dmp

Filesize
1024KB

Download
memory/1988-2-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/1988-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1988-8-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/1988-7-0x0000000000400000-0x00000000005FE000-memory.dmp

Filesize
2.0MB

Download
memory/1988-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2936-15-0x0000000000400000-0x00000000005FE000-memory.dmp

Filesize
2.0MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads