tofsee | c5af074d1dc7563538561414790ce838b29a04f80c877a0d3e235b83a2130d16

General

Target

c5af074d1dc7563538561414790ce838b29a04f80c877a0d3e235b83a2130d16.exe
Size

13.7MB
MD5

5408cff5586901cfb35b5ed13505c161
SHA1

e929d7dc906bdc0eb20c4009b085443bc7af996f
SHA256

c5af074d1dc7563538561414790ce838b29a04f80c877a0d3e235b83a2130d16
SHA512

f1f6bde7b47b13da6ede09ae7e25e1ac5444880cea3ed2bbad2a806ae7e80393998670febb7bbc0bd0221a3a9ce741b2a39ad7199ad561061e0545ae0966558c

Score

10^/10

tofsee evasion persistence 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
Creates new service(s) 1 TTPs
persistence

New Service
T1050
Executes dropped EXE 1 IoCs

Processes:

xokrihlp.exe

pid process

2360 xokrihlp.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

1468 netsh.exe

pid	process
2360	xokrihlp.exe

pid	process
1468	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\cequrjs\ImagePath = "C:\\Windows\\SysWOW64\\cequrjs\\xokrihlp.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

Processes:

c5af074d1dc7563538561414790ce838b29a04f80c877a0d3e235b83a2130d16.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation	c5af074d1dc7563538561414790ce838b29a04f80c877a0d3e235b83a2130d16.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

xokrihlp.exe

description pid process target process

PID 2360 set thread context of 1500 2360 xokrihlp.exe svchost.exe
Launches sc.exe 3 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exesc.exesc.exe

pid process

2552 sc.exe
4308 sc.exe
4244 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

description	pid	process	target process
PID 2360 set thread context of 1500	2360	xokrihlp.exe	svchost.exe

pid	process
2552	sc.exe
4308	sc.exe
4244	sc.exe

Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid	pid_target	process	target process
176	4408	WerFault.exe	c5af074d1dc7563538561414790ce838b29a04f80c877a0d3e235b83a2130d16.exe
3136	2360	WerFault.exe	xokrihlp.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

c5af074d1dc7563538561414790ce838b29a04f80c877a0d3e235b83a2130d16.exexokrihlp.exe

description	pid	process	target process
PID 4408 wrote to memory of 540	4408	c5af074d1dc7563538561414790ce838b29a04f80c877a0d3e235b83a2130d16.exe	cmd.exe
PID 4408 wrote to memory of 540	4408	c5af074d1dc7563538561414790ce838b29a04f80c877a0d3e235b83a2130d16.exe	cmd.exe
PID 4408 wrote to memory of 540	4408	c5af074d1dc7563538561414790ce838b29a04f80c877a0d3e235b83a2130d16.exe	cmd.exe
PID 4408 wrote to memory of 4988	4408	c5af074d1dc7563538561414790ce838b29a04f80c877a0d3e235b83a2130d16.exe	cmd.exe
PID 4408 wrote to memory of 4988	4408	c5af074d1dc7563538561414790ce838b29a04f80c877a0d3e235b83a2130d16.exe	cmd.exe
PID 4408 wrote to memory of 4988	4408	c5af074d1dc7563538561414790ce838b29a04f80c877a0d3e235b83a2130d16.exe	cmd.exe
PID 4408 wrote to memory of 2552	4408	c5af074d1dc7563538561414790ce838b29a04f80c877a0d3e235b83a2130d16.exe	sc.exe
PID 4408 wrote to memory of 2552	4408	c5af074d1dc7563538561414790ce838b29a04f80c877a0d3e235b83a2130d16.exe	sc.exe
PID 4408 wrote to memory of 2552	4408	c5af074d1dc7563538561414790ce838b29a04f80c877a0d3e235b83a2130d16.exe	sc.exe
PID 4408 wrote to memory of 4308	4408	c5af074d1dc7563538561414790ce838b29a04f80c877a0d3e235b83a2130d16.exe	sc.exe
PID 4408 wrote to memory of 4308	4408	c5af074d1dc7563538561414790ce838b29a04f80c877a0d3e235b83a2130d16.exe	sc.exe
PID 4408 wrote to memory of 4308	4408	c5af074d1dc7563538561414790ce838b29a04f80c877a0d3e235b83a2130d16.exe	sc.exe
PID 4408 wrote to memory of 4244	4408	c5af074d1dc7563538561414790ce838b29a04f80c877a0d3e235b83a2130d16.exe	sc.exe
PID 4408 wrote to memory of 4244	4408	c5af074d1dc7563538561414790ce838b29a04f80c877a0d3e235b83a2130d16.exe	sc.exe
PID 4408 wrote to memory of 4244	4408	c5af074d1dc7563538561414790ce838b29a04f80c877a0d3e235b83a2130d16.exe	sc.exe
PID 4408 wrote to memory of 1468	4408	c5af074d1dc7563538561414790ce838b29a04f80c877a0d3e235b83a2130d16.exe	netsh.exe
PID 4408 wrote to memory of 1468	4408	c5af074d1dc7563538561414790ce838b29a04f80c877a0d3e235b83a2130d16.exe	netsh.exe
PID 4408 wrote to memory of 1468	4408	c5af074d1dc7563538561414790ce838b29a04f80c877a0d3e235b83a2130d16.exe	netsh.exe
PID 2360 wrote to memory of 1500	2360	xokrihlp.exe	svchost.exe
PID 2360 wrote to memory of 1500	2360	xokrihlp.exe	svchost.exe
PID 2360 wrote to memory of 1500	2360	xokrihlp.exe	svchost.exe
PID 2360 wrote to memory of 1500	2360	xokrihlp.exe	svchost.exe
PID 2360 wrote to memory of 1500	2360	xokrihlp.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\c5af074d1dc7563538561414790ce838b29a04f80c877a0d3e235b83a2130d16.exe
"C:\Users\Admin\AppData\Local\Temp\c5af074d1dc7563538561414790ce838b29a04f80c877a0d3e235b83a2130d16.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4408

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\cequrjs\
2⤵
PID:540

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\xokrihlp.exe" C:\Windows\SysWOW64\cequrjs\
2⤵
PID:4988

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create cequrjs binPath= "C:\Windows\SysWOW64\cequrjs\xokrihlp.exe /d\"C:\Users\Admin\AppData\Local\Temp\c5af074d1dc7563538561414790ce838b29a04f80c877a0d3e235b83a2130d16.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:2552

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description cequrjs "wifi internet conection"
2⤵
- Launches sc.exe
PID:4308

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start cequrjs
2⤵
- Launches sc.exe
PID:4244

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
PID:1468

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4408 -s 1044
2⤵
- Program crash
PID:176

C:\Windows\SysWOW64\cequrjs\xokrihlp.exe
C:\Windows\SysWOW64\cequrjs\xokrihlp.exe /d"C:\Users\Admin\AppData\Local\Temp\c5af074d1dc7563538561414790ce838b29a04f80c877a0d3e235b83a2130d16.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2360

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
PID:1500

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2360 -s 512
2⤵
- Program crash
PID:3136

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4408 -ip 4408
1⤵
PID:1732

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 2360 -ip 2360
1⤵
PID:1564

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

New Service

1

T1050

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

New Service

1

T1050

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\xokrihlp.exe
Filesize
14.9MB

MD5
ad43da03460bd4e6aa52a99ee084489d

SHA1
d96c8936f342be001a939f870b32cc4fbfa7e55f

SHA256
3d2b5a22ac0c9b4cd5935999c5ae1c6bd8839f578afa55c33ea184a14c21f0c1

SHA512
182774ac7e80b297b41f9689927256c7e8676c3efb11792339926d29a1d70e1a066b9088872ee10b7b444b38eaf49d93a534e3130fb1c000624b68f659bf45b5

Download Submit
C:\Windows\SysWOW64\cequrjs\xokrihlp.exe
Filesize
14.9MB

MD5
ad43da03460bd4e6aa52a99ee084489d

SHA1
d96c8936f342be001a939f870b32cc4fbfa7e55f

SHA256
3d2b5a22ac0c9b4cd5935999c5ae1c6bd8839f578afa55c33ea184a14c21f0c1

SHA512
182774ac7e80b297b41f9689927256c7e8676c3efb11792339926d29a1d70e1a066b9088872ee10b7b444b38eaf49d93a534e3130fb1c000624b68f659bf45b5

Download Submit
memory/540-133-0x0000000000000000-mapping.dmp

Download
memory/1468-140-0x0000000000000000-mapping.dmp

Download
memory/1500-152-0x0000000000F00000-0x0000000000F15000-memory.dmp

Filesize
84KB

Download
memory/1500-151-0x0000000000F00000-0x0000000000F15000-memory.dmp

Filesize
84KB

Download
memory/1500-145-0x0000000000F00000-0x0000000000F15000-memory.dmp

Filesize
84KB

Download
memory/1500-144-0x0000000000000000-mapping.dmp

Download
memory/2360-143-0x0000000000E03000-0x0000000000E11000-memory.dmp

Filesize
56KB

Download
memory/2360-150-0x0000000000400000-0x0000000000C25000-memory.dmp

Filesize
8.1MB

Download
memory/2360-149-0x0000000000E03000-0x0000000000E11000-memory.dmp

Filesize
56KB

Download
memory/2360-146-0x0000000000400000-0x0000000000C25000-memory.dmp

Filesize
8.1MB

Download
memory/2552-136-0x0000000000000000-mapping.dmp

Download
memory/4244-138-0x0000000000000000-mapping.dmp

Download
memory/4308-137-0x0000000000000000-mapping.dmp

Download
memory/4408-142-0x0000000000400000-0x0000000000C25000-memory.dmp

Filesize
8.1MB

Download
memory/4408-141-0x0000000000C98000-0x0000000000CA6000-memory.dmp

Filesize
56KB

Download
memory/4408-130-0x0000000000C98000-0x0000000000CA6000-memory.dmp

Filesize
56KB

Download
memory/4408-131-0x0000000002820000-0x0000000002833000-memory.dmp

Filesize
76KB

Download
memory/4408-132-0x0000000000400000-0x0000000000C25000-memory.dmp

Filesize
8.1MB

Download
memory/4988-134-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads