tofsee | 7f145faefedbe2eb4b8e4600b3bfe9f3fa6b0a51b6575dde15d38b074f37109f

General

Target

2025-01-18_99c735028626d2f1b44d2957df9a59d2_mafia.exe
Size

14.9MB
MD5

99c735028626d2f1b44d2957df9a59d2
SHA1

bb75cf3af10c7c71a740416c902d0e15dd6bf5de
SHA256

7f145faefedbe2eb4b8e4600b3bfe9f3fa6b0a51b6575dde15d38b074f37109f
SHA512

ba49ce98236a77cd2afaca400bfedf43dc48c2612ac82c5615ff7ec8bc9e928906e85d94f5c25dc3f73a4f46cc62dbc7a343555562f6a6ae7ba810e0532cbf61
SSDEEP

24576:yEfmTNIkv/ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ3:Lfot

Score

10^/10

tofsee discovery evasion 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

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
2148	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\ykwyrpgw\ImagePath = "C:\\Windows\\SysWOW64\\ykwyrpgw\\yummjyxl.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-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	2025-01-18_99c735028626d2f1b44d2957df9a59d2_mafia.exe

Deletes itself 1 IoCs

pid	Process
4712	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4524	yummjyxl.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4524 set thread context of 4712	4524	yummjyxl.exe	98

Launches sc.exe 3 IoCs

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

pid	Process
4892	sc.exe
3344	sc.exe
2544	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
3132	1948	WerFault.exe	81
1132	4524	WerFault.exe	92

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	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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2025-01-18_99c735028626d2f1b44d2957df9a59d2_mafia.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	yummjyxl.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1948 wrote to memory of 3112	1948	2025-01-18_99c735028626d2f1b44d2957df9a59d2_mafia.exe	82
PID 1948 wrote to memory of 3112	1948	2025-01-18_99c735028626d2f1b44d2957df9a59d2_mafia.exe	82
PID 1948 wrote to memory of 3112	1948	2025-01-18_99c735028626d2f1b44d2957df9a59d2_mafia.exe	82
PID 1948 wrote to memory of 4548	1948	2025-01-18_99c735028626d2f1b44d2957df9a59d2_mafia.exe	84
PID 1948 wrote to memory of 4548	1948	2025-01-18_99c735028626d2f1b44d2957df9a59d2_mafia.exe	84
PID 1948 wrote to memory of 4548	1948	2025-01-18_99c735028626d2f1b44d2957df9a59d2_mafia.exe	84
PID 1948 wrote to memory of 4892	1948	2025-01-18_99c735028626d2f1b44d2957df9a59d2_mafia.exe	86
PID 1948 wrote to memory of 4892	1948	2025-01-18_99c735028626d2f1b44d2957df9a59d2_mafia.exe	86
PID 1948 wrote to memory of 4892	1948	2025-01-18_99c735028626d2f1b44d2957df9a59d2_mafia.exe	86
PID 1948 wrote to memory of 3344	1948	2025-01-18_99c735028626d2f1b44d2957df9a59d2_mafia.exe	88
PID 1948 wrote to memory of 3344	1948	2025-01-18_99c735028626d2f1b44d2957df9a59d2_mafia.exe	88
PID 1948 wrote to memory of 3344	1948	2025-01-18_99c735028626d2f1b44d2957df9a59d2_mafia.exe	88
PID 1948 wrote to memory of 2544	1948	2025-01-18_99c735028626d2f1b44d2957df9a59d2_mafia.exe	90
PID 1948 wrote to memory of 2544	1948	2025-01-18_99c735028626d2f1b44d2957df9a59d2_mafia.exe	90
PID 1948 wrote to memory of 2544	1948	2025-01-18_99c735028626d2f1b44d2957df9a59d2_mafia.exe	90
PID 1948 wrote to memory of 2148	1948	2025-01-18_99c735028626d2f1b44d2957df9a59d2_mafia.exe	93
PID 1948 wrote to memory of 2148	1948	2025-01-18_99c735028626d2f1b44d2957df9a59d2_mafia.exe	93
PID 1948 wrote to memory of 2148	1948	2025-01-18_99c735028626d2f1b44d2957df9a59d2_mafia.exe	93
PID 4524 wrote to memory of 4712	4524	yummjyxl.exe	98
PID 4524 wrote to memory of 4712	4524	yummjyxl.exe	98
PID 4524 wrote to memory of 4712	4524	yummjyxl.exe	98
PID 4524 wrote to memory of 4712	4524	yummjyxl.exe	98
PID 4524 wrote to memory of 4712	4524	yummjyxl.exe	98

C:\Users\Admin\AppData\Local\Temp\2025-01-18_99c735028626d2f1b44d2957df9a59d2_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-01-18_99c735028626d2f1b44d2957df9a59d2_mafia.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1948
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ykwyrpgw\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3112
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\yummjyxl.exe" C:\Windows\SysWOW64\ykwyrpgw\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4548
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ykwyrpgw binPath= "C:\Windows\SysWOW64\ykwyrpgw\yummjyxl.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-01-18_99c735028626d2f1b44d2957df9a59d2_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4892
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ykwyrpgw "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3344
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ykwyrpgw
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2544
- 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:2148
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1948 -s 592
  2⤵
  - Program crash
  PID:3132

C:\Windows\SysWOW64\ykwyrpgw\yummjyxl.exe
C:\Windows\SysWOW64\ykwyrpgw\yummjyxl.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-01-18_99c735028626d2f1b44d2957df9a59d2_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4524
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4712
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4524 -s 516
  2⤵
  - Program crash
  PID:1132

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 1948 -ip 1948
1⤵
PID:3064

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 4524 -ip 4524
1⤵
PID:2416

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

Replay Monitor

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Downloads

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

Filesize
12.2MB

MD5
cd6119a6887d12e8a6af23b9775245e1

SHA1
08738b782c517cc6816ed66a649d7f10d4bb9d1c

SHA256
b54818cac515f99b1893e58f8562902b3a15c969ab1bfdb549df96bd53977ed6

SHA512
a69ced571e38ecd24d776b7de9c1ab6b874cdb906da0695abe917c221d3b7d3e900994385dfe3c5db1ea83cae84a112e9010fe42dd2f67e2c10bcd8a130835e3

Download Submit
memory/1948-8-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/1948-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1948-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/1948-7-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/1948-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1948-1-0x0000000000540000-0x0000000000640000-memory.dmp

Filesize
1024KB

Download
memory/4524-11-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/4524-13-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/4524-12-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/4524-19-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/4712-14-0x0000000001270000-0x0000000001285000-memory.dmp

Filesize
84KB

Download
memory/4712-16-0x0000000001270000-0x0000000001285000-memory.dmp

Filesize
84KB

Download
memory/4712-17-0x0000000001270000-0x0000000001285000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads