tofsee | 04543d61bba615b50f871612ac8124907b8493fae002f29d614fa2032643705d

General

Target

7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe
Size

229KB
MD5

ddb3205a92ff18ae17b3f9f93c7b197c
SHA1

b77c666a2d7b1f63ba08316f9a221be6ac1f786a
SHA256

7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8
SHA512

db659ead4fd2ed186f221adf5bb9ab5b686253454eeb307ba247a99d8026c009d72ed11473d4622146c7b6cf59f445ad3b020ac3394d3f61af5bfd385b43c334
SSDEEP

3072:lnUQviqZALXadUs0vEJimn1K29YbqYZgpLneYDR89fJ5j3UxS6MeILYS:lnUzPjflapLnsdT3U2eILY

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

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

Windows Service
T1543.003
Modifies Windows Firewall 2 TTPs 1 IoCs
evasion

Windows Service
T1543.003

Disable or Modify System Firewall
T1562.004

Processes:

netsh.exe

pid process

3516 netsh.exe

pid	process
3516	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

svchost.exe

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

7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2288054676-1871194608-3559553667-1000\Control Panel\International\Geo\Nation	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

4760 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

lffxakoa.exe

pid process

5028 lffxakoa.exe

pid	process
4760	svchost.exe

pid	process
5028	lffxakoa.exe

Drops file in System32 directory 2 IoCs

Processes:

svchost.exe

description	ioc	process
File created	C:\Windows\SysWOW64\config\systemprofile:.repos	svchost.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile:.repos	svchost.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

lffxakoa.exe

description pid process target process

PID 5028 set thread context of 4760 5028 lffxakoa.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

4400 sc.exe
5004 sc.exe
2468 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

description	pid	process	target process
PID 5028 set thread context of 4760	5028	lffxakoa.exe	svchost.exe

pid	process
4400	sc.exe
5004	sc.exe
2468	sc.exe

Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid	pid_target	process	target process
2596	4192	WerFault.exe	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe
3540	5028	WerFault.exe	lffxakoa.exe

Modifies data under HKEY_USERS 3 IoCs

Processes:

svchost.exe

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\Control Panel\Buses	svchost.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Control Panel\Buses\Config0 = 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	svchost.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Control Panel\Buses\Config0 = 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	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exelffxakoa.exe

description	pid	process	target process
PID 4192 wrote to memory of 5056	4192	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe	cmd.exe
PID 4192 wrote to memory of 5056	4192	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe	cmd.exe
PID 4192 wrote to memory of 5056	4192	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe	cmd.exe
PID 4192 wrote to memory of 4840	4192	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe	cmd.exe
PID 4192 wrote to memory of 4840	4192	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe	cmd.exe
PID 4192 wrote to memory of 4840	4192	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe	cmd.exe
PID 4192 wrote to memory of 4400	4192	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe	sc.exe
PID 4192 wrote to memory of 4400	4192	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe	sc.exe
PID 4192 wrote to memory of 4400	4192	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe	sc.exe
PID 4192 wrote to memory of 5004	4192	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe	sc.exe
PID 4192 wrote to memory of 5004	4192	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe	sc.exe
PID 4192 wrote to memory of 5004	4192	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe	sc.exe
PID 4192 wrote to memory of 2468	4192	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe	sc.exe
PID 4192 wrote to memory of 2468	4192	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe	sc.exe
PID 4192 wrote to memory of 2468	4192	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe	sc.exe
PID 5028 wrote to memory of 4760	5028	lffxakoa.exe	svchost.exe
PID 5028 wrote to memory of 4760	5028	lffxakoa.exe	svchost.exe
PID 5028 wrote to memory of 4760	5028	lffxakoa.exe	svchost.exe
PID 5028 wrote to memory of 4760	5028	lffxakoa.exe	svchost.exe
PID 5028 wrote to memory of 4760	5028	lffxakoa.exe	svchost.exe
PID 4192 wrote to memory of 3516	4192	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe	netsh.exe
PID 4192 wrote to memory of 3516	4192	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe	netsh.exe
PID 4192 wrote to memory of 3516	4192	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe
"C:\Users\Admin\AppData\Local\Temp\7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4192

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xfgokblv\
2⤵
PID:5056

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\lffxakoa.exe" C:\Windows\SysWOW64\xfgokblv\
2⤵
PID:4840

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create xfgokblv binPath= "C:\Windows\SysWOW64\xfgokblv\lffxakoa.exe /d\"C:\Users\Admin\AppData\Local\Temp\7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:4400

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description xfgokblv "wifi internet conection"
2⤵
- Launches sc.exe
PID:5004

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start xfgokblv
2⤵
- Launches sc.exe
PID:2468

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:3516

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4192 -s 660
2⤵
- Program crash
PID:2596

C:\Windows\SysWOW64\xfgokblv\lffxakoa.exe
C:\Windows\SysWOW64\xfgokblv\lffxakoa.exe /d"C:\Users\Admin\AppData\Local\Temp\7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5028

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
- Deletes itself
- Drops file in System32 directory
- Modifies data under HKEY_USERS
PID:4760

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 5028 -s 572
2⤵
- Program crash
PID:3540

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 476 -p 5028 -ip 5028
1⤵
PID:5088

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 4192 -ip 4192
1⤵
PID:4764

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

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

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\lffxakoa.exe
Filesize
12.7MB

MD5
f6c1f5cf96856eb52e5c2f482159f83d

SHA1
e54e56db5be29b7d8d1fe695448e584d6721db94

SHA256
5ea3fbe88ceb121d1feefc50db75f3195d2a3c3194d4b648c5ba9821a9c64db5

SHA512
4cbf29c6bcdf7ac53b24af889782171091e51e9b6d14eb1e3ac709407d41f71cdc100fdefe2342026d085e458c272cf4bcab60f51f62e49bfefd29a4685eb257

Download Submit
memory/4192-16-0x0000000000400000-0x000000000043E000-memory.dmp

Filesize
248KB

Download
memory/4192-2-0x00000000005A0000-0x00000000005B3000-memory.dmp

Filesize
76KB

Download
memory/4192-3-0x0000000000400000-0x000000000043E000-memory.dmp

Filesize
248KB

Download
memory/4192-1-0x00000000005C0000-0x00000000006C0000-memory.dmp

Filesize
1024KB

Download
memory/4760-20-0x0000000000FB0000-0x0000000000FC5000-memory.dmp

Filesize
84KB

Download
memory/4760-18-0x0000000000FB0000-0x0000000000FC5000-memory.dmp

Filesize
84KB

Download
memory/4760-11-0x0000000000FB0000-0x0000000000FC5000-memory.dmp

Filesize
84KB

Download
memory/4760-14-0x0000000000FB0000-0x0000000000FC5000-memory.dmp

Filesize
84KB

Download
memory/4760-17-0x0000000000FB0000-0x0000000000FC5000-memory.dmp

Filesize
84KB

Download
memory/5028-10-0x0000000000400000-0x000000000043E000-memory.dmp

Filesize
248KB

Download
memory/5028-15-0x0000000000400000-0x000000000043E000-memory.dmp

Filesize
248KB

Download
memory/5028-9-0x0000000000D00000-0x0000000000D13000-memory.dmp

Filesize
76KB

Download
memory/5028-8-0x0000000000660000-0x0000000000760000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads