tofsee | 3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc

General

Target

3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe
Size

262KB
MD5

f0a0aad635dfaf849e931d305893f282
SHA1

1501b1f501b1ba2d3b42555f8292e32bd9c00268
SHA256

3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc
SHA512

26f7773e81fdd30fd86cac6b6ded11333f1f95cc1a7d8301d535a1ead16cda38368c96a5fee0fa927197118458a57b442ddf446ce7fe0f1531f3c3b50e2ac96f

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:

qxkknyql.exe

pid process

3672 qxkknyql.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

4232 netsh.exe

pid	process
3672	qxkknyql.exe

pid	process
4232	netsh.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:

3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Control Panel\International\Geo\Nation	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.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

4224 sc.exe
5052 sc.exe
540 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

1596 400 WerFault.exe 3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe

pid	process
4224	sc.exe
5052	sc.exe
540	sc.exe

pid	pid_target	process	target process
1596	400	WerFault.exe	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe

description	pid	process	target process
PID 400 wrote to memory of 3896	400	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	cmd.exe
PID 400 wrote to memory of 3896	400	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	cmd.exe
PID 400 wrote to memory of 3896	400	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	cmd.exe
PID 400 wrote to memory of 3436	400	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	cmd.exe
PID 400 wrote to memory of 3436	400	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	cmd.exe
PID 400 wrote to memory of 3436	400	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	cmd.exe
PID 400 wrote to memory of 4224	400	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	sc.exe
PID 400 wrote to memory of 4224	400	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	sc.exe
PID 400 wrote to memory of 4224	400	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	sc.exe
PID 400 wrote to memory of 5052	400	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	sc.exe
PID 400 wrote to memory of 5052	400	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	sc.exe
PID 400 wrote to memory of 5052	400	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	sc.exe
PID 400 wrote to memory of 540	400	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	sc.exe
PID 400 wrote to memory of 540	400	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	sc.exe
PID 400 wrote to memory of 540	400	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	sc.exe
PID 400 wrote to memory of 4232	400	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	netsh.exe
PID 400 wrote to memory of 4232	400	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	netsh.exe
PID 400 wrote to memory of 4232	400	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe
"C:\Users\Admin\AppData\Local\Temp\3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:400

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\tgexgvy\
2⤵
PID:3896

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qxkknyql.exe" C:\Windows\SysWOW64\tgexgvy\
2⤵
PID:3436

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create tgexgvy binPath= "C:\Windows\SysWOW64\tgexgvy\qxkknyql.exe /d\"C:\Users\Admin\AppData\Local\Temp\3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:4224

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description tgexgvy "wifi internet conection"
2⤵
- Launches sc.exe
PID:5052

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start tgexgvy
2⤵
- Launches sc.exe
PID:540

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:4232

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 400 -s 1032
2⤵
- Program crash
PID:1596

C:\Windows\SysWOW64\tgexgvy\qxkknyql.exe
C:\Windows\SysWOW64\tgexgvy\qxkknyql.exe /d"C:\Users\Admin\AppData\Local\Temp\3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe"
1⤵
- Executes dropped EXE
PID:3672

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 400 -ip 400
1⤵
PID:760

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

New Service

1

T1050

Modify Existing Service

1

T1031

Privilege Escalation

New Service

1

T1050

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\qxkknyql.exe
Filesize
11.7MB

MD5
33a7b2ccedabe4fbaed974b4f40a6146

SHA1
398f77ed3b572f43705f86680f3feb808b6fd8a7

SHA256
aea023f37cb6b3a440eb144cb05209e8e042a0574d99bd3fba5294a506352caf

SHA512
85354b29fcc49ed36d85a48b296fbf358dca87751f2386574b898422492ddacbfe012facdc5a6ae0efa2845e087961ef83fd8908d13163063bf6b20fe703812a

Download Submit
C:\Windows\SysWOW64\tgexgvy\qxkknyql.exe
Filesize
11.7MB

MD5
33a7b2ccedabe4fbaed974b4f40a6146

SHA1
398f77ed3b572f43705f86680f3feb808b6fd8a7

SHA256
aea023f37cb6b3a440eb144cb05209e8e042a0574d99bd3fba5294a506352caf

SHA512
85354b29fcc49ed36d85a48b296fbf358dca87751f2386574b898422492ddacbfe012facdc5a6ae0efa2845e087961ef83fd8908d13163063bf6b20fe703812a

Download Submit
memory/400-130-0x00000000006CD000-0x00000000006DD000-memory.dmp

Filesize
64KB

Download
memory/400-131-0x00000000006CD000-0x00000000006DD000-memory.dmp

Filesize
64KB

Download
memory/400-132-0x0000000000400000-0x0000000000463000-memory.dmp

Filesize
396KB

Download
memory/400-141-0x0000000000400000-0x0000000000463000-memory.dmp

Filesize
396KB

Download
memory/540-138-0x0000000000000000-mapping.dmp

Download
memory/3436-134-0x0000000000000000-mapping.dmp

Download
memory/3896-133-0x0000000000000000-mapping.dmp

Download
memory/4224-136-0x0000000000000000-mapping.dmp

Download
memory/4232-140-0x0000000000000000-mapping.dmp

Download
memory/5052-137-0x0000000000000000-mapping.dmp

Download

Analysis

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