tofsee | 3f7bb036eef312a9c1fca60105f1b87235dc8b14d617e415f95a7043f9efe917

General

Target

3f7bb036eef312a9c1fca60105f1b87235dc8b14d617e415f95a7043f9efe917.exe
Size

137KB
MD5

708dc91ee0b8a61718e9991a1396b23f
SHA1

d7bd310fd1a8ba9500c00b4e7626aa780552d26c
SHA256

3f7bb036eef312a9c1fca60105f1b87235dc8b14d617e415f95a7043f9efe917
SHA512

569e90713153b268f2cdcb12e78156facdcda6e936ae45e0032d317efe9d8d442d53335ab7e37514cb800d9885d5c575209b2a64e098e69c4c4db20f927f7278

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:

nvoejgyi.exe

pid process

3596 nvoejgyi.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

4412 netsh.exe

pid	process
3596	nvoejgyi.exe

pid	process
4412	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\jezureac\ImagePath = "C:\\Windows\\SysWOW64\\jezureac\\nvoejgyi.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:

3f7bb036eef312a9c1fca60105f1b87235dc8b14d617e415f95a7043f9efe917.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation	3f7bb036eef312a9c1fca60105f1b87235dc8b14d617e415f95a7043f9efe917.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

nvoejgyi.exe

description pid process target process

PID 3596 set thread context of 2008 3596 nvoejgyi.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

3444 sc.exe
1084 sc.exe
2840 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 3596 set thread context of 2008	3596	nvoejgyi.exe	svchost.exe

pid	process
3444	sc.exe
1084	sc.exe
2840	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

3f7bb036eef312a9c1fca60105f1b87235dc8b14d617e415f95a7043f9efe917.exenvoejgyi.exe

description	pid	process	target process
PID 4880 wrote to memory of 2696	4880	3f7bb036eef312a9c1fca60105f1b87235dc8b14d617e415f95a7043f9efe917.exe	cmd.exe
PID 4880 wrote to memory of 2696	4880	3f7bb036eef312a9c1fca60105f1b87235dc8b14d617e415f95a7043f9efe917.exe	cmd.exe
PID 4880 wrote to memory of 2696	4880	3f7bb036eef312a9c1fca60105f1b87235dc8b14d617e415f95a7043f9efe917.exe	cmd.exe
PID 4880 wrote to memory of 4092	4880	3f7bb036eef312a9c1fca60105f1b87235dc8b14d617e415f95a7043f9efe917.exe	cmd.exe
PID 4880 wrote to memory of 4092	4880	3f7bb036eef312a9c1fca60105f1b87235dc8b14d617e415f95a7043f9efe917.exe	cmd.exe
PID 4880 wrote to memory of 4092	4880	3f7bb036eef312a9c1fca60105f1b87235dc8b14d617e415f95a7043f9efe917.exe	cmd.exe
PID 4880 wrote to memory of 3444	4880	3f7bb036eef312a9c1fca60105f1b87235dc8b14d617e415f95a7043f9efe917.exe	sc.exe
PID 4880 wrote to memory of 3444	4880	3f7bb036eef312a9c1fca60105f1b87235dc8b14d617e415f95a7043f9efe917.exe	sc.exe
PID 4880 wrote to memory of 3444	4880	3f7bb036eef312a9c1fca60105f1b87235dc8b14d617e415f95a7043f9efe917.exe	sc.exe
PID 4880 wrote to memory of 1084	4880	3f7bb036eef312a9c1fca60105f1b87235dc8b14d617e415f95a7043f9efe917.exe	sc.exe
PID 4880 wrote to memory of 1084	4880	3f7bb036eef312a9c1fca60105f1b87235dc8b14d617e415f95a7043f9efe917.exe	sc.exe
PID 4880 wrote to memory of 1084	4880	3f7bb036eef312a9c1fca60105f1b87235dc8b14d617e415f95a7043f9efe917.exe	sc.exe
PID 4880 wrote to memory of 2840	4880	3f7bb036eef312a9c1fca60105f1b87235dc8b14d617e415f95a7043f9efe917.exe	sc.exe
PID 4880 wrote to memory of 2840	4880	3f7bb036eef312a9c1fca60105f1b87235dc8b14d617e415f95a7043f9efe917.exe	sc.exe
PID 4880 wrote to memory of 2840	4880	3f7bb036eef312a9c1fca60105f1b87235dc8b14d617e415f95a7043f9efe917.exe	sc.exe
PID 4880 wrote to memory of 4412	4880	3f7bb036eef312a9c1fca60105f1b87235dc8b14d617e415f95a7043f9efe917.exe	netsh.exe
PID 4880 wrote to memory of 4412	4880	3f7bb036eef312a9c1fca60105f1b87235dc8b14d617e415f95a7043f9efe917.exe	netsh.exe
PID 4880 wrote to memory of 4412	4880	3f7bb036eef312a9c1fca60105f1b87235dc8b14d617e415f95a7043f9efe917.exe	netsh.exe
PID 3596 wrote to memory of 2008	3596	nvoejgyi.exe	svchost.exe
PID 3596 wrote to memory of 2008	3596	nvoejgyi.exe	svchost.exe
PID 3596 wrote to memory of 2008	3596	nvoejgyi.exe	svchost.exe
PID 3596 wrote to memory of 2008	3596	nvoejgyi.exe	svchost.exe
PID 3596 wrote to memory of 2008	3596	nvoejgyi.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\3f7bb036eef312a9c1fca60105f1b87235dc8b14d617e415f95a7043f9efe917.exe
"C:\Users\Admin\AppData\Local\Temp\3f7bb036eef312a9c1fca60105f1b87235dc8b14d617e415f95a7043f9efe917.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4880

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jezureac\
2⤵
PID:2696

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nvoejgyi.exe" C:\Windows\SysWOW64\jezureac\
2⤵
PID:4092

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create jezureac binPath= "C:\Windows\SysWOW64\jezureac\nvoejgyi.exe /d\"C:\Users\Admin\AppData\Local\Temp\3f7bb036eef312a9c1fca60105f1b87235dc8b14d617e415f95a7043f9efe917.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:3444

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description jezureac "wifi internet conection"
2⤵
- Launches sc.exe
PID:1084

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start jezureac
2⤵
- Launches sc.exe
PID:2840

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:4412

C:\Windows\SysWOW64\jezureac\nvoejgyi.exe
C:\Windows\SysWOW64\jezureac\nvoejgyi.exe /d"C:\Users\Admin\AppData\Local\Temp\3f7bb036eef312a9c1fca60105f1b87235dc8b14d617e415f95a7043f9efe917.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3596

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
PID:2008

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\nvoejgyi.exe
Filesize
12.0MB

MD5
a665c7a2c493301e996bc72ec24a189f

SHA1
5b43e795eb45a84873ec418b3cd9ee41e046a475

SHA256
d8916be8f404a1ccec0971b2aa1f57bd99fce731bdcc966e35ec5513f95d3304

SHA512
3f54b4f3e7c4736a7b7e8ed2d1c6d1089110df2aa35279b6fcf3e08db13fdf96fa0a3b2927e592e0d76cb6ebb3890c5dd0b13beed19d5202c914dec53ca7f402

Download Submit
C:\Windows\SysWOW64\jezureac\nvoejgyi.exe
Filesize
12.0MB

MD5
a665c7a2c493301e996bc72ec24a189f

SHA1
5b43e795eb45a84873ec418b3cd9ee41e046a475

SHA256
d8916be8f404a1ccec0971b2aa1f57bd99fce731bdcc966e35ec5513f95d3304

SHA512
3f54b4f3e7c4736a7b7e8ed2d1c6d1089110df2aa35279b6fcf3e08db13fdf96fa0a3b2927e592e0d76cb6ebb3890c5dd0b13beed19d5202c914dec53ca7f402

Download Submit
memory/1084-135-0x0000000000000000-mapping.dmp

Download
memory/2008-140-0x0000000000000000-mapping.dmp

Download
memory/2008-145-0x0000000000430000-0x0000000000445000-memory.dmp

Filesize
84KB

Download
memory/2008-144-0x0000000000430000-0x0000000000445000-memory.dmp

Filesize
84KB

Download
memory/2008-143-0x0000000000430000-0x0000000000445000-memory.dmp

Filesize
84KB

Download
memory/2008-141-0x0000000000430000-0x0000000000445000-memory.dmp

Filesize
84KB

Download
memory/2696-131-0x0000000000000000-mapping.dmp

Download
memory/2840-136-0x0000000000000000-mapping.dmp

Download
memory/3444-134-0x0000000000000000-mapping.dmp

Download
memory/3596-139-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/4092-132-0x0000000000000000-mapping.dmp

Download
memory/4412-137-0x0000000000000000-mapping.dmp

Download
memory/4880-130-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads