tofsee | 821d32ec3b1096bab5043eb2a972bdd0bad4335ec556347d6bbcc5a7d876f46a

General

Target

2025-01-25_b137c1122cdf7928ea36ec3683589cce_mafia.exe
Size

12.3MB
MD5

b137c1122cdf7928ea36ec3683589cce
SHA1

b68d7899b7a539407f887889c55045d477926acd
SHA256

821d32ec3b1096bab5043eb2a972bdd0bad4335ec556347d6bbcc5a7d876f46a
SHA512

622594adfbf65e7cc3f844fd3d5d3ca3eb0a70330eaa3d1736d7349c2c5041229b48a622d30ef3e6edf2e25812d4f415d8357416e35cf1421985c1c27a3531ba
SSDEEP

393216:5XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX:

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
4892	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\sybjorsk\ImagePath = "C:\\Windows\\SysWOW64\\sybjorsk\\rpyzietp.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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	2025-01-25_b137c1122cdf7928ea36ec3683589cce_mafia.exe

Deletes itself 1 IoCs

pid	Process
3204	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1604	rpyzietp.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1604 set thread context of 3204	1604	rpyzietp.exe	94

Launches sc.exe 3 IoCs

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

pid	Process
4140	sc.exe
1372	sc.exe
2888	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	2025-01-25_b137c1122cdf7928ea36ec3683589cce_mafia.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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.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	rpyzietp.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1168 wrote to memory of 5060	1168	2025-01-25_b137c1122cdf7928ea36ec3683589cce_mafia.exe	82
PID 1168 wrote to memory of 5060	1168	2025-01-25_b137c1122cdf7928ea36ec3683589cce_mafia.exe	82
PID 1168 wrote to memory of 5060	1168	2025-01-25_b137c1122cdf7928ea36ec3683589cce_mafia.exe	82
PID 1168 wrote to memory of 2272	1168	2025-01-25_b137c1122cdf7928ea36ec3683589cce_mafia.exe	84
PID 1168 wrote to memory of 2272	1168	2025-01-25_b137c1122cdf7928ea36ec3683589cce_mafia.exe	84
PID 1168 wrote to memory of 2272	1168	2025-01-25_b137c1122cdf7928ea36ec3683589cce_mafia.exe	84
PID 1168 wrote to memory of 4140	1168	2025-01-25_b137c1122cdf7928ea36ec3683589cce_mafia.exe	87
PID 1168 wrote to memory of 4140	1168	2025-01-25_b137c1122cdf7928ea36ec3683589cce_mafia.exe	87
PID 1168 wrote to memory of 4140	1168	2025-01-25_b137c1122cdf7928ea36ec3683589cce_mafia.exe	87
PID 1168 wrote to memory of 1372	1168	2025-01-25_b137c1122cdf7928ea36ec3683589cce_mafia.exe	89
PID 1168 wrote to memory of 1372	1168	2025-01-25_b137c1122cdf7928ea36ec3683589cce_mafia.exe	89
PID 1168 wrote to memory of 1372	1168	2025-01-25_b137c1122cdf7928ea36ec3683589cce_mafia.exe	89
PID 1168 wrote to memory of 2888	1168	2025-01-25_b137c1122cdf7928ea36ec3683589cce_mafia.exe	91
PID 1168 wrote to memory of 2888	1168	2025-01-25_b137c1122cdf7928ea36ec3683589cce_mafia.exe	91
PID 1168 wrote to memory of 2888	1168	2025-01-25_b137c1122cdf7928ea36ec3683589cce_mafia.exe	91
PID 1604 wrote to memory of 3204	1604	rpyzietp.exe	94
PID 1604 wrote to memory of 3204	1604	rpyzietp.exe	94
PID 1604 wrote to memory of 3204	1604	rpyzietp.exe	94
PID 1604 wrote to memory of 3204	1604	rpyzietp.exe	94
PID 1604 wrote to memory of 3204	1604	rpyzietp.exe	94
PID 1168 wrote to memory of 4892	1168	2025-01-25_b137c1122cdf7928ea36ec3683589cce_mafia.exe	95
PID 1168 wrote to memory of 4892	1168	2025-01-25_b137c1122cdf7928ea36ec3683589cce_mafia.exe	95
PID 1168 wrote to memory of 4892	1168	2025-01-25_b137c1122cdf7928ea36ec3683589cce_mafia.exe	95

C:\Users\Admin\AppData\Local\Temp\2025-01-25_b137c1122cdf7928ea36ec3683589cce_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2025-01-25_b137c1122cdf7928ea36ec3683589cce_mafia.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1168
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\sybjorsk\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:5060
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rpyzietp.exe" C:\Windows\SysWOW64\sybjorsk\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2272
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create sybjorsk binPath= "C:\Windows\SysWOW64\sybjorsk\rpyzietp.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-01-25_b137c1122cdf7928ea36ec3683589cce_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4140
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description sybjorsk "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1372
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start sybjorsk
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2888
- 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:4892

C:\Windows\SysWOW64\sybjorsk\rpyzietp.exe
C:\Windows\SysWOW64\sybjorsk\rpyzietp.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-01-25_b137c1122cdf7928ea36ec3683589cce_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1604
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3204

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\rpyzietp.exe

Filesize
10.7MB

MD5
c96251b811fd4393eb727c2d509bda7c

SHA1
6171664e5c463141358617088db85e6e187cc688

SHA256
93e799ff91df350fa4a65d1ada0f03f90f6b2a5a80415a545e76c756ff6f6add

SHA512
0ddba7b60c498a59c3f594f85f8dd594b8006d9cd50923da38bfa038483c09482859ca39a1db62cd097373ba4f799dbefcb7554cec5d7fcac3ce8d225214bb43

Download Submit
memory/1168-17-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1168-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1168-2-0x0000000000570000-0x0000000000583000-memory.dmp

Filesize
76KB

Download
memory/1168-15-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download
memory/1168-1-0x0000000000680000-0x0000000000780000-memory.dmp

Filesize
1024KB

Download
memory/1168-16-0x0000000000570000-0x0000000000583000-memory.dmp

Filesize
76KB

Download
memory/1604-8-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download
memory/1604-12-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download
memory/3204-9-0x0000000000D30000-0x0000000000D45000-memory.dmp

Filesize
84KB

Download
memory/3204-14-0x0000000000D30000-0x0000000000D45000-memory.dmp

Filesize
84KB

Download
memory/3204-18-0x0000000000D30000-0x0000000000D45000-memory.dmp

Filesize
84KB

Download
memory/3204-19-0x0000000000D30000-0x0000000000D45000-memory.dmp

Filesize
84KB

Download
memory/3204-20-0x0000000000D30000-0x0000000000D45000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads