tofsee | 209e78147c676b2562945d15e0637303f819bc8a2f0e34f5cfa8ba16137e85a5

General

Target

file.exe
Size

213KB
MD5

dac1f98021e82370657ca79d43940e9e
SHA1

1d69c84299549560c1a46d085256a27d6a074621
SHA256

209e78147c676b2562945d15e0637303f819bc8a2f0e34f5cfa8ba16137e85a5
SHA512

56f829653430fffee2e9799902fd38bb726c28bdda5accd43e5c3b333ef2c909d7b9c865e8ba3041609bfc415b9283a9cf4d3888dd81b1091fae7b7cc53b5432
SSDEEP

3072:HnCD27R5eVPDZg4lrEh+DsuNk0+LpzCJMZZmEo8ksJ5tMxqyI7iMPre:HRjeVPu4lrEh+Dsik0+RTDw9u/7iMT

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

Windows security bypass 2 TTPs 1 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\ufbqhkqp = "0"	svchost.exe

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

1512 netsh.exe

pid	process
1512	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\ufbqhkqp\ImagePath = "C:\\Windows\\SysWOW64\\ufbqhkqp\\qkpnilik.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

548 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

qkpnilik.exe

pid process

880 qkpnilik.exe
Drops file in System32 directory 1 IoCs

Processes:

svchost.exe

description ioc process

File created C:\Windows\SysWOW64\config\systemprofile:.repos svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

qkpnilik.exe

description pid process target process

PID 880 set thread context of 548 880 qkpnilik.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

1116 sc.exe
692 sc.exe
472 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

pid	process
548	svchost.exe

pid	process
880	qkpnilik.exe

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

description	pid	process	target process
PID 880 set thread context of 548	880	qkpnilik.exe	svchost.exe

pid	process
1116	sc.exe
692	sc.exe
472	sc.exe

Modifies data under HKEY_USERS 2 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

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

file.exeqkpnilik.exe

description	pid	process	target process
PID 1360 wrote to memory of 1516	1360	file.exe	cmd.exe
PID 1360 wrote to memory of 1516	1360	file.exe	cmd.exe
PID 1360 wrote to memory of 1516	1360	file.exe	cmd.exe
PID 1360 wrote to memory of 1516	1360	file.exe	cmd.exe
PID 1360 wrote to memory of 1812	1360	file.exe	cmd.exe
PID 1360 wrote to memory of 1812	1360	file.exe	cmd.exe
PID 1360 wrote to memory of 1812	1360	file.exe	cmd.exe
PID 1360 wrote to memory of 1812	1360	file.exe	cmd.exe
PID 1360 wrote to memory of 1116	1360	file.exe	sc.exe
PID 1360 wrote to memory of 1116	1360	file.exe	sc.exe
PID 1360 wrote to memory of 1116	1360	file.exe	sc.exe
PID 1360 wrote to memory of 1116	1360	file.exe	sc.exe
PID 1360 wrote to memory of 692	1360	file.exe	sc.exe
PID 1360 wrote to memory of 692	1360	file.exe	sc.exe
PID 1360 wrote to memory of 692	1360	file.exe	sc.exe
PID 1360 wrote to memory of 692	1360	file.exe	sc.exe
PID 1360 wrote to memory of 472	1360	file.exe	sc.exe
PID 1360 wrote to memory of 472	1360	file.exe	sc.exe
PID 1360 wrote to memory of 472	1360	file.exe	sc.exe
PID 1360 wrote to memory of 472	1360	file.exe	sc.exe
PID 880 wrote to memory of 548	880	qkpnilik.exe	svchost.exe
PID 880 wrote to memory of 548	880	qkpnilik.exe	svchost.exe
PID 880 wrote to memory of 548	880	qkpnilik.exe	svchost.exe
PID 880 wrote to memory of 548	880	qkpnilik.exe	svchost.exe
PID 880 wrote to memory of 548	880	qkpnilik.exe	svchost.exe
PID 880 wrote to memory of 548	880	qkpnilik.exe	svchost.exe
PID 1360 wrote to memory of 1512	1360	file.exe	netsh.exe
PID 1360 wrote to memory of 1512	1360	file.exe	netsh.exe
PID 1360 wrote to memory of 1512	1360	file.exe	netsh.exe
PID 1360 wrote to memory of 1512	1360	file.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1360

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ufbqhkqp\
2⤵
PID:1516

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qkpnilik.exe" C:\Windows\SysWOW64\ufbqhkqp\
2⤵
PID:1812

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create ufbqhkqp binPath= "C:\Windows\SysWOW64\ufbqhkqp\qkpnilik.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:1116

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description ufbqhkqp "wifi internet conection"
2⤵
- Launches sc.exe
PID:692

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start ufbqhkqp
2⤵
- Launches sc.exe
PID:472

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:1512

C:\Windows\SysWOW64\ufbqhkqp\qkpnilik.exe
C:\Windows\SysWOW64\ufbqhkqp\qkpnilik.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:880

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Windows security bypass
- Sets service image path in registry
- Deletes itself
- Drops file in System32 directory
- Modifies data under HKEY_USERS
PID:548

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

Disabling Security Tools

1

T1089

Modify Registry

2

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\qkpnilik.exe
Filesize
10.2MB

MD5
299e433b52eeaf7636ab565d7e33f2e9

SHA1
356574f2ac8a19ac93df6271cf11f823c37137d6

SHA256
56677712a7e3fb6d43cf465eed3119494c4aae1b53072849aa0ae4c0f4afff88

SHA512
4699306b20de612ca9612714360d98d7fd575bc1dfd53949e59786f7bd8f2adb0f8bf86c4ceb757157ee48c554832baab9c8900ee2e8219416fa984eaab8335c

Download Submit
C:\Windows\SysWOW64\ufbqhkqp\qkpnilik.exe
Filesize
10.2MB

MD5
299e433b52eeaf7636ab565d7e33f2e9

SHA1
356574f2ac8a19ac93df6271cf11f823c37137d6

SHA256
56677712a7e3fb6d43cf465eed3119494c4aae1b53072849aa0ae4c0f4afff88

SHA512
4699306b20de612ca9612714360d98d7fd575bc1dfd53949e59786f7bd8f2adb0f8bf86c4ceb757157ee48c554832baab9c8900ee2e8219416fa984eaab8335c

Download Submit
memory/548-61-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/548-62-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/548-60-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/548-67-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/548-68-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/548-69-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/548-71-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/880-66-0x0000000000400000-0x00000000004A2000-memory.dmp

Filesize
648KB

Download
memory/1360-56-0x00000000001B0000-0x00000000001C3000-memory.dmp

Filesize
76KB

Download
memory/1360-64-0x0000000000400000-0x00000000004A2000-memory.dmp

Filesize
648KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads