tofsee | 23689438b3f8ea7ce154f6169f3941b13121c2887055ef3dbcb73b2cb414c2f4

Analysis

max time kernel
144s
max time network
120s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
01-02-2025 20:26

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General

Target

2025-02-01_954c53ce4a1dc631c1313f0e31164ce3_mafia.exe
Size

13.2MB
MD5

954c53ce4a1dc631c1313f0e31164ce3
SHA1

f4a9581315b7d2b22592f2786188fdae32c019c4
SHA256

23689438b3f8ea7ce154f6169f3941b13121c2887055ef3dbcb73b2cb414c2f4
SHA512

6ebf7e56713c776ed13f5b846472e46aaba3d2fb0dc1ac2a5a0afc4165c56cafc4895541d5f7bc30df8b7830abf5d6152acbfc29dd8421384accd3831432af90
SSDEEP

6144:cLQ1p/2p5e+D2jFHO+iZoy6u9FlfrXEz9NQNQNQNQNQNQNQNQNQNQNQNQNQNQNQV:RTYe+D2jFu+iZoUFhAz

Score

10^/10

tofsee defense_evasion discovery execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

43.231.4.7

lazystax.ru

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\zrmdyxbx = "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
1940	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\zrmdyxbx\ImagePath = "C:\\Windows\\SysWOW64\\zrmdyxbx\\vrjjgvui.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
332	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2640	vrjjgvui.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2640 set thread context of 332	2640	vrjjgvui.exe	43

Launches sc.exe 3 IoCs

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

pid	Process
2884	sc.exe
2620	sc.exe
2588	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	vrjjgvui.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2025-02-01_954c53ce4a1dc631c1313f0e31164ce3_mafia.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

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2824 wrote to memory of 2584	2824	2025-02-01_954c53ce4a1dc631c1313f0e31164ce3_mafia.exe	30
PID 2824 wrote to memory of 2584	2824	2025-02-01_954c53ce4a1dc631c1313f0e31164ce3_mafia.exe	30
PID 2824 wrote to memory of 2584	2824	2025-02-01_954c53ce4a1dc631c1313f0e31164ce3_mafia.exe	30
PID 2824 wrote to memory of 2584	2824	2025-02-01_954c53ce4a1dc631c1313f0e31164ce3_mafia.exe	30
PID 2824 wrote to memory of 2800	2824	2025-02-01_954c53ce4a1dc631c1313f0e31164ce3_mafia.exe	32
PID 2824 wrote to memory of 2800	2824	2025-02-01_954c53ce4a1dc631c1313f0e31164ce3_mafia.exe	32
PID 2824 wrote to memory of 2800	2824	2025-02-01_954c53ce4a1dc631c1313f0e31164ce3_mafia.exe	32
PID 2824 wrote to memory of 2800	2824	2025-02-01_954c53ce4a1dc631c1313f0e31164ce3_mafia.exe	32
PID 2824 wrote to memory of 2884	2824	2025-02-01_954c53ce4a1dc631c1313f0e31164ce3_mafia.exe	34
PID 2824 wrote to memory of 2884	2824	2025-02-01_954c53ce4a1dc631c1313f0e31164ce3_mafia.exe	34
PID 2824 wrote to memory of 2884	2824	2025-02-01_954c53ce4a1dc631c1313f0e31164ce3_mafia.exe	34
PID 2824 wrote to memory of 2884	2824	2025-02-01_954c53ce4a1dc631c1313f0e31164ce3_mafia.exe	34
PID 2824 wrote to memory of 2620	2824	2025-02-01_954c53ce4a1dc631c1313f0e31164ce3_mafia.exe	36
PID 2824 wrote to memory of 2620	2824	2025-02-01_954c53ce4a1dc631c1313f0e31164ce3_mafia.exe	36
PID 2824 wrote to memory of 2620	2824	2025-02-01_954c53ce4a1dc631c1313f0e31164ce3_mafia.exe	36
PID 2824 wrote to memory of 2620	2824	2025-02-01_954c53ce4a1dc631c1313f0e31164ce3_mafia.exe	36
PID 2824 wrote to memory of 2588	2824	2025-02-01_954c53ce4a1dc631c1313f0e31164ce3_mafia.exe	38
PID 2824 wrote to memory of 2588	2824	2025-02-01_954c53ce4a1dc631c1313f0e31164ce3_mafia.exe	38
PID 2824 wrote to memory of 2588	2824	2025-02-01_954c53ce4a1dc631c1313f0e31164ce3_mafia.exe	38
PID 2824 wrote to memory of 2588	2824	2025-02-01_954c53ce4a1dc631c1313f0e31164ce3_mafia.exe	38
PID 2824 wrote to memory of 1940	2824	2025-02-01_954c53ce4a1dc631c1313f0e31164ce3_mafia.exe	41
PID 2824 wrote to memory of 1940	2824	2025-02-01_954c53ce4a1dc631c1313f0e31164ce3_mafia.exe	41
PID 2824 wrote to memory of 1940	2824	2025-02-01_954c53ce4a1dc631c1313f0e31164ce3_mafia.exe	41
PID 2824 wrote to memory of 1940	2824	2025-02-01_954c53ce4a1dc631c1313f0e31164ce3_mafia.exe	41
PID 2640 wrote to memory of 332	2640	vrjjgvui.exe	43
PID 2640 wrote to memory of 332	2640	vrjjgvui.exe	43
PID 2640 wrote to memory of 332	2640	vrjjgvui.exe	43
PID 2640 wrote to memory of 332	2640	vrjjgvui.exe	43
PID 2640 wrote to memory of 332	2640	vrjjgvui.exe	43
PID 2640 wrote to memory of 332	2640	vrjjgvui.exe	43

C:\Users\Admin\AppData\Local\Temp\2025-02-01_954c53ce4a1dc631c1313f0e31164ce3_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-02-01_954c53ce4a1dc631c1313f0e31164ce3_mafia.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2824
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zrmdyxbx\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2584
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vrjjgvui.exe" C:\Windows\SysWOW64\zrmdyxbx\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2800
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create zrmdyxbx binPath= "C:\Windows\SysWOW64\zrmdyxbx\vrjjgvui.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-02-01_954c53ce4a1dc631c1313f0e31164ce3_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2884
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description zrmdyxbx "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2620
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start zrmdyxbx
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2588
- 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:1940

C:\Windows\SysWOW64\zrmdyxbx\vrjjgvui.exe
C:\Windows\SysWOW64\zrmdyxbx\vrjjgvui.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-02-01_954c53ce4a1dc631c1313f0e31164ce3_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2640
- 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:332

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\vrjjgvui.exe

Filesize
11.5MB

MD5
c15b4cfd4cea02fc55d57af8bf070a36

SHA1
c8a67802d33a2363de332b3cf80942267b66eed6

SHA256
cc818e8fc4d68e1d87fd4ba4e8c6cef784b1d0e0d64c2474b9dc5943287f2c6b

SHA512
468bc255cfcee32fa68aca26f78e2ba561949cd13c72a3db674ad55dbde2ed9c1e49222bdb1d9d87eda81316dc8f8c1cd23b34c45c91c3c4c5b0a6deec77909a

Download Submit
memory/332-17-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/332-14-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/332-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/332-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/332-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2640-15-0x0000000000400000-0x00000000004C1000-memory.dmp

Filesize
772KB

Download
memory/2824-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2824-2-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2824-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2824-8-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2824-7-0x0000000000400000-0x00000000004C1000-memory.dmp

Filesize
772KB

Download
memory/2824-1-0x0000000000640000-0x0000000000740000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads