tofsee | 0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647

Analysis

max time kernel
146s
max time network
147s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
28/01/2025, 05:38

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General

Target

0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe
Size

10.7MB
MD5

27d42e4a1a5137d5a8171fa0998feff6
SHA1

c286cbcc0c3840a5c086016a9f432acdb2466bf5
SHA256

0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647
SHA512

2df5b37a8d89a632b780c2e01c0407216b66e2c9495b55d5fb7f984d6eaad409d2a1cc1f6c25f4c26b7e0c13cc89731d0f7baef1f781da642e31cea358c422db
SSDEEP

3072:WcSKLbut7BWLMcD/FHNKZuKqtyONJvq4H6gGIvuFHrHtIxJXA4/a9t/a9t/a9t/6:gKHOWwe/RNKkK0vNdq4HZG0Wr2u

Score

10^/10

tofsee defense_evasion discovery 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
Tofsee family
tofsee

Windows security bypass 2 TTPs 1 IoCs

defense_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\tekirhbq = "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

defense_evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
2732	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\tekirhbq\ImagePath = "C:\\Windows\\SysWOW64\\tekirhbq\\bnzebhgu.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2640	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3004	bnzebhgu.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3004 set thread context of 2640	3004	bnzebhgu.exe	43

Launches sc.exe 3 IoCs

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

pid	Process
2744	sc.exe
2872	sc.exe
2724	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	bnzebhgu.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2680 wrote to memory of 1808	2680	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	30
PID 2680 wrote to memory of 1808	2680	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	30
PID 2680 wrote to memory of 1808	2680	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	30
PID 2680 wrote to memory of 1808	2680	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	30
PID 2680 wrote to memory of 2988	2680	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	32
PID 2680 wrote to memory of 2988	2680	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	32
PID 2680 wrote to memory of 2988	2680	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	32
PID 2680 wrote to memory of 2988	2680	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	32
PID 2680 wrote to memory of 2744	2680	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	34
PID 2680 wrote to memory of 2744	2680	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	34
PID 2680 wrote to memory of 2744	2680	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	34
PID 2680 wrote to memory of 2744	2680	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	34
PID 2680 wrote to memory of 2872	2680	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	36
PID 2680 wrote to memory of 2872	2680	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	36
PID 2680 wrote to memory of 2872	2680	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	36
PID 2680 wrote to memory of 2872	2680	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	36
PID 2680 wrote to memory of 2724	2680	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	38
PID 2680 wrote to memory of 2724	2680	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	38
PID 2680 wrote to memory of 2724	2680	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	38
PID 2680 wrote to memory of 2724	2680	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	38
PID 2680 wrote to memory of 2732	2680	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	41
PID 2680 wrote to memory of 2732	2680	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	41
PID 2680 wrote to memory of 2732	2680	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	41
PID 2680 wrote to memory of 2732	2680	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	41
PID 3004 wrote to memory of 2640	3004	bnzebhgu.exe	43
PID 3004 wrote to memory of 2640	3004	bnzebhgu.exe	43
PID 3004 wrote to memory of 2640	3004	bnzebhgu.exe	43
PID 3004 wrote to memory of 2640	3004	bnzebhgu.exe	43
PID 3004 wrote to memory of 2640	3004	bnzebhgu.exe	43
PID 3004 wrote to memory of 2640	3004	bnzebhgu.exe	43

C:\Users\Admin\AppData\Local\Temp\0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe
"C:\Users\Admin\AppData\Local\Temp\0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2680
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\tekirhbq\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1808
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bnzebhgu.exe" C:\Windows\SysWOW64\tekirhbq\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2988
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create tekirhbq binPath= "C:\Windows\SysWOW64\tekirhbq\bnzebhgu.exe /d\"C:\Users\Admin\AppData\Local\Temp\0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2744
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description tekirhbq "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2872
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start tekirhbq
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2724
- 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:2732

C:\Windows\SysWOW64\tekirhbq\bnzebhgu.exe
C:\Windows\SysWOW64\tekirhbq\bnzebhgu.exe /d"C:\Users\Admin\AppData\Local\Temp\0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3004
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2640

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

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Downloads

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

Filesize
12.3MB

MD5
6ec8cd002f6e93f8c9d594a4cc740117

SHA1
1182176fd407c788141d38689430caea6e88513e

SHA256
07a4570b6efc511518c5f7f76653cab796188f8e7f6fa1054541b3f47a2f67be

SHA512
8d53f9a8ae02fbd82792675de042e8c7fbec0fb4c7c0a14d345d3484f87c7807e65b0d26ead3b2fc3abb6efd93cd7ede77160a83bd2d2bf9ed46233ccdae2d02

Download Submit
memory/2640-11-0x00000000000D0000-0x00000000000E5000-memory.dmp

Filesize
84KB

Download
memory/2640-14-0x00000000000D0000-0x00000000000E5000-memory.dmp

Filesize
84KB

Download
memory/2640-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2640-16-0x00000000000D0000-0x00000000000E5000-memory.dmp

Filesize
84KB

Download
memory/2640-18-0x00000000000D0000-0x00000000000E5000-memory.dmp

Filesize
84KB

Download
memory/2680-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2680-2-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2680-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2680-8-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2680-7-0x0000000000400000-0x0000000002284000-memory.dmp

Filesize
30.5MB

Download
memory/2680-1-0x00000000023F0000-0x00000000024F0000-memory.dmp

Filesize
1024KB

Download
memory/3004-17-0x0000000000400000-0x0000000002284000-memory.dmp

Filesize
30.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads