tofsee | 26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41

General

Target

26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe
Size

12.5MB
MD5

f5053c329648e5c62b1ecdb93d8eaaef
SHA1

9ffe4ab344356576b7d97f3067ec3cf03c9ab3f4
SHA256

26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41
SHA512

e3a52d09f1133e380b649dda1d8a7998a4f111b735d5bff3b37028acfab829aaf4fbca5bb237d6c8ca63d3be8c2fadaa7e7a687e513dccbbf146af261cd351fc
SSDEEP

49152:ZvUWkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkQ:Z5

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

quadoil.ru

lakeflex.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
856	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\gydjlrfe\ImagePath = "C:\\Windows\\SysWOW64\\gydjlrfe\\udmuiair.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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe

Deletes itself 1 IoCs

pid	Process
1792	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3196	udmuiair.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3196 set thread context of 1792	3196	udmuiair.exe	108

Launches sc.exe 3 IoCs

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

pid	Process
1600	sc.exe
4628	sc.exe
3460	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 queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
2192	4432	WerFault.exe	82
2408	3196	WerFault.exe	100

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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	udmuiair.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4432 wrote to memory of 4444	4432	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	85
PID 4432 wrote to memory of 4444	4432	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	85
PID 4432 wrote to memory of 4444	4432	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	85
PID 4432 wrote to memory of 4052	4432	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	87
PID 4432 wrote to memory of 4052	4432	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	87
PID 4432 wrote to memory of 4052	4432	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	87
PID 4432 wrote to memory of 1600	4432	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	94
PID 4432 wrote to memory of 1600	4432	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	94
PID 4432 wrote to memory of 1600	4432	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	94
PID 4432 wrote to memory of 4628	4432	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	96
PID 4432 wrote to memory of 4628	4432	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	96
PID 4432 wrote to memory of 4628	4432	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	96
PID 4432 wrote to memory of 3460	4432	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	98
PID 4432 wrote to memory of 3460	4432	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	98
PID 4432 wrote to memory of 3460	4432	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	98
PID 4432 wrote to memory of 856	4432	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	101
PID 4432 wrote to memory of 856	4432	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	101
PID 4432 wrote to memory of 856	4432	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	101
PID 3196 wrote to memory of 1792	3196	udmuiair.exe	108
PID 3196 wrote to memory of 1792	3196	udmuiair.exe	108
PID 3196 wrote to memory of 1792	3196	udmuiair.exe	108
PID 3196 wrote to memory of 1792	3196	udmuiair.exe	108
PID 3196 wrote to memory of 1792	3196	udmuiair.exe	108

C:\Users\Admin\AppData\Local\Temp\26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe
"C:\Users\Admin\AppData\Local\Temp\26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4432
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\gydjlrfe\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4444
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\udmuiair.exe" C:\Windows\SysWOW64\gydjlrfe\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4052
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create gydjlrfe binPath= "C:\Windows\SysWOW64\gydjlrfe\udmuiair.exe /d\"C:\Users\Admin\AppData\Local\Temp\26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1600
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description gydjlrfe "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4628
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start gydjlrfe
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3460
- 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:856
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4432 -s 1420
  2⤵
  - Program crash
  PID:2192

C:\Windows\SysWOW64\gydjlrfe\udmuiair.exe
C:\Windows\SysWOW64\gydjlrfe\udmuiair.exe /d"C:\Users\Admin\AppData\Local\Temp\26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3196
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1792
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3196 -s 528
  2⤵
  - Program crash
  PID:2408

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4432 -ip 4432
1⤵
PID:4296

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3196 -ip 3196
1⤵
PID:2704

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

Loading Replay Monitor...

Downloads

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

Filesize
11.3MB

MD5
2c0a0d9c250acd5410016235205a1155

SHA1
c02597aa0d0ffc9db1c9638146c1809ac7b96f79

SHA256
49973dc32cda5298dd1d49b49453c524530d62cffeafd8612d3c76d570c47d75

SHA512
6e0f56077b421df89a9e116486f7cd820d499cb4ac9ddcbdfbe6b9b8a29f90460df3759b91bafc98e5989b6a0cba3a891d7e23bb41aa10eb00153f5e92acb925

Download Submit
memory/1792-11-0x0000000001210000-0x0000000001225000-memory.dmp

Filesize
84KB

Download
memory/1792-13-0x0000000001210000-0x0000000001225000-memory.dmp

Filesize
84KB

Download
memory/1792-14-0x0000000001210000-0x0000000001225000-memory.dmp

Filesize
84KB

Download
memory/3196-15-0x0000000000400000-0x0000000002DA4000-memory.dmp

Filesize
41.6MB

Download
memory/4432-2-0x0000000002F40000-0x0000000002F53000-memory.dmp

Filesize
76KB

Download
memory/4432-1-0x0000000003140000-0x0000000003240000-memory.dmp

Filesize
1024KB

Download
memory/4432-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4432-9-0x0000000002F40000-0x0000000002F53000-memory.dmp

Filesize
76KB

Download
memory/4432-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4432-8-0x0000000000400000-0x0000000002DA4000-memory.dmp

Filesize
41.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads