tofsee | a8ffadf2ab8d3c75298773b6b619a6e5cbfc9557592f2993195f82d12987f049

General

Target

de3f27526eca92d8bab305d2942fbaf89d96b5fda6467dbf931b373868215b0b.exe
Size

302KB
MD5

c47f32f68a1ca3309768b48ec98cd752
SHA1

ab24f2d6a2cacd0b807b2a174e4c43e8d629b32e
SHA256

de3f27526eca92d8bab305d2942fbaf89d96b5fda6467dbf931b373868215b0b
SHA512

747db0d277eac21cdb2f51862fe861e27b444bdae4ed08bcc92a92d27c75c6ee602723fa102a3501f980bea18bd2c9a500113c6e9cf42d752240e145b1bd610d
SSDEEP

3072:Muy7xHO5Ur+3sfGjmvp8hPdJidlfZl8ebAGMR5zODTKchd+OH:xy7xHvrmsejm6d2NZlDAGMHOKcv+y

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

New Service
T1050
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

2760 netsh.exe

pid	process
2760	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\nmywmqle\ImagePath = "C:\\Windows\\SysWOW64\\nmywmqle\\bnzebhgu.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:

de3f27526eca92d8bab305d2942fbaf89d96b5fda6467dbf931b373868215b0b.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Control Panel\International\Geo\Nation	de3f27526eca92d8bab305d2942fbaf89d96b5fda6467dbf931b373868215b0b.exe

Executes dropped EXE 1 IoCs

Processes:

bnzebhgu.exe

pid process

4676 bnzebhgu.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

bnzebhgu.exe

description pid process target process

PID 4676 set thread context of 4092 4676 bnzebhgu.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

2212 sc.exe
3584 sc.exe
4172 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
4676	bnzebhgu.exe

description	pid	process	target process
PID 4676 set thread context of 4092	4676	bnzebhgu.exe	svchost.exe

pid	process
2212	sc.exe
3584	sc.exe
4172	sc.exe

Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid	pid_target	process	target process
4304	1756	WerFault.exe	de3f27526eca92d8bab305d2942fbaf89d96b5fda6467dbf931b373868215b0b.exe
3008	4676	WerFault.exe	bnzebhgu.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

de3f27526eca92d8bab305d2942fbaf89d96b5fda6467dbf931b373868215b0b.exebnzebhgu.exe

description	pid	process	target process
PID 1756 wrote to memory of 1772	1756	de3f27526eca92d8bab305d2942fbaf89d96b5fda6467dbf931b373868215b0b.exe	cmd.exe
PID 1756 wrote to memory of 1772	1756	de3f27526eca92d8bab305d2942fbaf89d96b5fda6467dbf931b373868215b0b.exe	cmd.exe
PID 1756 wrote to memory of 1772	1756	de3f27526eca92d8bab305d2942fbaf89d96b5fda6467dbf931b373868215b0b.exe	cmd.exe
PID 1756 wrote to memory of 1852	1756	de3f27526eca92d8bab305d2942fbaf89d96b5fda6467dbf931b373868215b0b.exe	cmd.exe
PID 1756 wrote to memory of 1852	1756	de3f27526eca92d8bab305d2942fbaf89d96b5fda6467dbf931b373868215b0b.exe	cmd.exe
PID 1756 wrote to memory of 1852	1756	de3f27526eca92d8bab305d2942fbaf89d96b5fda6467dbf931b373868215b0b.exe	cmd.exe
PID 1756 wrote to memory of 2212	1756	de3f27526eca92d8bab305d2942fbaf89d96b5fda6467dbf931b373868215b0b.exe	sc.exe
PID 1756 wrote to memory of 2212	1756	de3f27526eca92d8bab305d2942fbaf89d96b5fda6467dbf931b373868215b0b.exe	sc.exe
PID 1756 wrote to memory of 2212	1756	de3f27526eca92d8bab305d2942fbaf89d96b5fda6467dbf931b373868215b0b.exe	sc.exe
PID 1756 wrote to memory of 3584	1756	de3f27526eca92d8bab305d2942fbaf89d96b5fda6467dbf931b373868215b0b.exe	sc.exe
PID 1756 wrote to memory of 3584	1756	de3f27526eca92d8bab305d2942fbaf89d96b5fda6467dbf931b373868215b0b.exe	sc.exe
PID 1756 wrote to memory of 3584	1756	de3f27526eca92d8bab305d2942fbaf89d96b5fda6467dbf931b373868215b0b.exe	sc.exe
PID 1756 wrote to memory of 4172	1756	de3f27526eca92d8bab305d2942fbaf89d96b5fda6467dbf931b373868215b0b.exe	sc.exe
PID 1756 wrote to memory of 4172	1756	de3f27526eca92d8bab305d2942fbaf89d96b5fda6467dbf931b373868215b0b.exe	sc.exe
PID 1756 wrote to memory of 4172	1756	de3f27526eca92d8bab305d2942fbaf89d96b5fda6467dbf931b373868215b0b.exe	sc.exe
PID 1756 wrote to memory of 2760	1756	de3f27526eca92d8bab305d2942fbaf89d96b5fda6467dbf931b373868215b0b.exe	netsh.exe
PID 1756 wrote to memory of 2760	1756	de3f27526eca92d8bab305d2942fbaf89d96b5fda6467dbf931b373868215b0b.exe	netsh.exe
PID 1756 wrote to memory of 2760	1756	de3f27526eca92d8bab305d2942fbaf89d96b5fda6467dbf931b373868215b0b.exe	netsh.exe
PID 4676 wrote to memory of 4092	4676	bnzebhgu.exe	svchost.exe
PID 4676 wrote to memory of 4092	4676	bnzebhgu.exe	svchost.exe
PID 4676 wrote to memory of 4092	4676	bnzebhgu.exe	svchost.exe
PID 4676 wrote to memory of 4092	4676	bnzebhgu.exe	svchost.exe
PID 4676 wrote to memory of 4092	4676	bnzebhgu.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\de3f27526eca92d8bab305d2942fbaf89d96b5fda6467dbf931b373868215b0b.exe
"C:\Users\Admin\AppData\Local\Temp\de3f27526eca92d8bab305d2942fbaf89d96b5fda6467dbf931b373868215b0b.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1756

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\nmywmqle\
2⤵
PID:1772

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bnzebhgu.exe" C:\Windows\SysWOW64\nmywmqle\
2⤵
PID:1852

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create nmywmqle binPath= "C:\Windows\SysWOW64\nmywmqle\bnzebhgu.exe /d\"C:\Users\Admin\AppData\Local\Temp\de3f27526eca92d8bab305d2942fbaf89d96b5fda6467dbf931b373868215b0b.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:2212

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description nmywmqle "wifi internet conection"
2⤵
- Launches sc.exe
PID:3584

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start nmywmqle
2⤵
- Launches sc.exe
PID:4172

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:2760

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1756 -s 1208
2⤵
- Program crash
PID:4304

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 1756 -ip 1756
1⤵
PID:2440

C:\Windows\SysWOW64\nmywmqle\bnzebhgu.exe
C:\Windows\SysWOW64\nmywmqle\bnzebhgu.exe /d"C:\Users\Admin\AppData\Local\Temp\de3f27526eca92d8bab305d2942fbaf89d96b5fda6467dbf931b373868215b0b.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4676

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
PID:4092

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4676 -s 536
2⤵
- Program crash
PID:3008

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 500 -p 4676 -ip 4676
1⤵
PID:3680

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\bnzebhgu.exe
Filesize
13.0MB

MD5
1ad806e752d6c3143b53d73ef73739c1

SHA1
2a501bebf3c962b07f23a389475125ffa8fa36c3

SHA256
af8932bfa109a68c78239af71432b4408ba04a64d7370ceff3bd561e2b8d389e

SHA512
6412a0e9dece03d256402027767b54f18809ba089da080bc5d4fc4f15b6196b3c51c90850d2898c506c142bbaa3206937a5f30389efc2b9860661fa4c871c008

Download Submit
C:\Windows\SysWOW64\nmywmqle\bnzebhgu.exe
Filesize
13.0MB

MD5
1ad806e752d6c3143b53d73ef73739c1

SHA1
2a501bebf3c962b07f23a389475125ffa8fa36c3

SHA256
af8932bfa109a68c78239af71432b4408ba04a64d7370ceff3bd561e2b8d389e

SHA512
6412a0e9dece03d256402027767b54f18809ba089da080bc5d4fc4f15b6196b3c51c90850d2898c506c142bbaa3206937a5f30389efc2b9860661fa4c871c008

Download Submit
memory/1756-135-0x0000000000BE0000-0x0000000000BF3000-memory.dmp

Filesize
76KB

Download
memory/1756-137-0x0000000000400000-0x0000000000A5C000-memory.dmp

Filesize
6.4MB

Download
memory/1756-138-0x0000000000400000-0x0000000000A5C000-memory.dmp

Filesize
6.4MB

Download
memory/4092-143-0x0000000000900000-0x0000000000915000-memory.dmp

Filesize
84KB

Download
memory/4092-146-0x0000000000900000-0x0000000000915000-memory.dmp

Filesize
84KB

Download
memory/4092-148-0x0000000000900000-0x0000000000915000-memory.dmp

Filesize
84KB

Download
memory/4092-150-0x0000000000900000-0x0000000000915000-memory.dmp

Filesize
84KB

Download
memory/4092-151-0x0000000000900000-0x0000000000915000-memory.dmp

Filesize
84KB

Download
memory/4676-141-0x0000000000400000-0x0000000000A5C000-memory.dmp

Filesize
6.4MB

Download
memory/4676-147-0x0000000000400000-0x0000000000A5C000-memory.dmp

Filesize
6.4MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads