tofsee | 67cb0723c98ca1bd4c970326204405284d13a059a52bd99f425d69e41db7df3e

General

Target

2025-02-01_eec8aeb6f7e80453af273d0a3a2e5801_mafia.exe
Size

11.6MB
MD5

eec8aeb6f7e80453af273d0a3a2e5801
SHA1

7e2f1a2073fb3f457bfbfb719427bc74c103b5f3
SHA256

67cb0723c98ca1bd4c970326204405284d13a059a52bd99f425d69e41db7df3e
SHA512

9b6487ee0c4fbd752f3c2ce63ab50361731df39bd2390d2d177ecd6d843217a54831c8ccc7904d96c1412efce25254537518fb2fb71416501811edc7964a883c
SSDEEP

6144:xLQ1p/2p5e+D2jFHO+iZoy6u9FlfrXEz9NQNQNQNQNQNQNQNQNQNQNQNQNQNQNQ4:STYe+D2jFu+iZoUFhAz

Score

10^/10

tofsee defense_evasion discovery execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

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
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
1544	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\yxxrsyzl\ImagePath = "C:\\Windows\\SysWOW64\\yxxrsyzl\\ucrvigpp.exe"	svchost.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1412605595-2147700071-3468511006-1000\Control Panel\International\Geo\Nation	2025-02-01_eec8aeb6f7e80453af273d0a3a2e5801_mafia.exe

Deletes itself 1 IoCs

pid	Process
3936	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3948	ucrvigpp.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3948 set thread context of 3936	3948	ucrvigpp.exe	102

Launches sc.exe 3 IoCs

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

pid	Process
1832	sc.exe
2404	sc.exe
2900	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

Program crash 2 IoCs

pid	pid_target	Process	procid_target
3028	4908	WerFault.exe	85
1256	3948	WerFault.exe	98

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	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	2025-02-01_eec8aeb6f7e80453af273d0a3a2e5801_mafia.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ucrvigpp.exe
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	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4908 wrote to memory of 2864	4908	2025-02-01_eec8aeb6f7e80453af273d0a3a2e5801_mafia.exe	88
PID 4908 wrote to memory of 2864	4908	2025-02-01_eec8aeb6f7e80453af273d0a3a2e5801_mafia.exe	88
PID 4908 wrote to memory of 2864	4908	2025-02-01_eec8aeb6f7e80453af273d0a3a2e5801_mafia.exe	88
PID 4908 wrote to memory of 3348	4908	2025-02-01_eec8aeb6f7e80453af273d0a3a2e5801_mafia.exe	90
PID 4908 wrote to memory of 3348	4908	2025-02-01_eec8aeb6f7e80453af273d0a3a2e5801_mafia.exe	90
PID 4908 wrote to memory of 3348	4908	2025-02-01_eec8aeb6f7e80453af273d0a3a2e5801_mafia.exe	90
PID 4908 wrote to memory of 1832	4908	2025-02-01_eec8aeb6f7e80453af273d0a3a2e5801_mafia.exe	92
PID 4908 wrote to memory of 1832	4908	2025-02-01_eec8aeb6f7e80453af273d0a3a2e5801_mafia.exe	92
PID 4908 wrote to memory of 1832	4908	2025-02-01_eec8aeb6f7e80453af273d0a3a2e5801_mafia.exe	92
PID 4908 wrote to memory of 2404	4908	2025-02-01_eec8aeb6f7e80453af273d0a3a2e5801_mafia.exe	94
PID 4908 wrote to memory of 2404	4908	2025-02-01_eec8aeb6f7e80453af273d0a3a2e5801_mafia.exe	94
PID 4908 wrote to memory of 2404	4908	2025-02-01_eec8aeb6f7e80453af273d0a3a2e5801_mafia.exe	94
PID 4908 wrote to memory of 2900	4908	2025-02-01_eec8aeb6f7e80453af273d0a3a2e5801_mafia.exe	96
PID 4908 wrote to memory of 2900	4908	2025-02-01_eec8aeb6f7e80453af273d0a3a2e5801_mafia.exe	96
PID 4908 wrote to memory of 2900	4908	2025-02-01_eec8aeb6f7e80453af273d0a3a2e5801_mafia.exe	96
PID 4908 wrote to memory of 1544	4908	2025-02-01_eec8aeb6f7e80453af273d0a3a2e5801_mafia.exe	99
PID 4908 wrote to memory of 1544	4908	2025-02-01_eec8aeb6f7e80453af273d0a3a2e5801_mafia.exe	99
PID 4908 wrote to memory of 1544	4908	2025-02-01_eec8aeb6f7e80453af273d0a3a2e5801_mafia.exe	99
PID 3948 wrote to memory of 3936	3948	ucrvigpp.exe	102
PID 3948 wrote to memory of 3936	3948	ucrvigpp.exe	102
PID 3948 wrote to memory of 3936	3948	ucrvigpp.exe	102
PID 3948 wrote to memory of 3936	3948	ucrvigpp.exe	102
PID 3948 wrote to memory of 3936	3948	ucrvigpp.exe	102

C:\Users\Admin\AppData\Local\Temp\2025-02-01_eec8aeb6f7e80453af273d0a3a2e5801_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-02-01_eec8aeb6f7e80453af273d0a3a2e5801_mafia.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4908
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\yxxrsyzl\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2864
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ucrvigpp.exe" C:\Windows\SysWOW64\yxxrsyzl\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3348
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create yxxrsyzl binPath= "C:\Windows\SysWOW64\yxxrsyzl\ucrvigpp.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-02-01_eec8aeb6f7e80453af273d0a3a2e5801_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1832
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description yxxrsyzl "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2404
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start yxxrsyzl
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2900
- 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:1544
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4908 -s 1028
  2⤵
  - Program crash
  PID:3028

C:\Windows\SysWOW64\yxxrsyzl\ucrvigpp.exe
C:\Windows\SysWOW64\yxxrsyzl\ucrvigpp.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-02-01_eec8aeb6f7e80453af273d0a3a2e5801_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3948
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3936
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3948 -s 512
  2⤵
  - Program crash
  PID:1256

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4908 -ip 4908
1⤵
PID:1816

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 3948 -ip 3948
1⤵
PID:3324

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

Modify Registry

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\ucrvigpp.exe

Filesize
13.7MB

MD5
e4f89850577cb7f0f8d29febdb8ac5b8

SHA1
661eb50b70b7665fb03418e2d60f6546cda2c1a4

SHA256
66f669015d25d10933e57ad3605fed3c082c466e0851900a0c130d16b0ae6a4a

SHA512
43f326ea6551b61551eb88495ae96ad5ba5a6dcc5f54059721b2393dbeb656c4006b2c8d252712f43c16b60b51111c9d6a768941095ff395f5ad4420b042079d

Download Submit
memory/3936-14-0x00000000004B0000-0x00000000004C5000-memory.dmp

Filesize
84KB

Download
memory/3936-22-0x00000000004B0000-0x00000000004C5000-memory.dmp

Filesize
84KB

Download
memory/3936-21-0x00000000004B0000-0x00000000004C5000-memory.dmp

Filesize
84KB

Download
memory/3936-20-0x00000000004B0000-0x00000000004C5000-memory.dmp

Filesize
84KB

Download
memory/3936-11-0x00000000004B0000-0x00000000004C5000-memory.dmp

Filesize
84KB

Download
memory/3948-8-0x0000000000400000-0x00000000004C1000-memory.dmp

Filesize
772KB

Download
memory/3948-10-0x0000000000400000-0x00000000004C1000-memory.dmp

Filesize
772KB

Download
memory/3948-16-0x0000000000400000-0x00000000004C1000-memory.dmp

Filesize
772KB

Download
memory/3948-9-0x0000000000400000-0x00000000004C1000-memory.dmp

Filesize
772KB

Download
memory/4908-1-0x00000000007F0000-0x00000000008F0000-memory.dmp

Filesize
1024KB

Download
memory/4908-19-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4908-18-0x00000000005E0000-0x00000000005F3000-memory.dmp

Filesize
76KB

Download
memory/4908-17-0x0000000000400000-0x00000000004C1000-memory.dmp

Filesize
772KB

Download
memory/4908-4-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4908-2-0x00000000005E0000-0x00000000005F3000-memory.dmp

Filesize
76KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads