tofsee | 85eca08e0d409e4c94322f454b9978281d4418ec61521a2feab505c76c7a6b02

General

Target

file.exe
Size

349KB
MD5

9c7cf69b45ace1ffd689b1725fd5bbfc
SHA1

b9b9677ff38eb6ee8b1b3ef85181675e84830ecf
SHA256

85eca08e0d409e4c94322f454b9978281d4418ec61521a2feab505c76c7a6b02
SHA512

9ac0e8740e8dcf989c652f6274b8023ee103a08c6b7775d658097a07a7162c27afc19d413d6b015552743a7eeafa601e38de27b1306f9d42b129cebe47683530
SSDEEP

3072:YT832BLU26yrK5sAFv0hHHyssE6QrjHwUUWQPiTdvaG9WLzjHhIh3eGjMgG1ao5e:zGBLH6yrDgchHSkfbATL/uRjMgU

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

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\vgdatdyo = "0"	svchost.exe

Creates new service(s) 1 TTPs
persistence

New Service
T1050
Executes dropped EXE 1 IoCs

Processes:

qgmtykod.exe

pid process

1292 qgmtykod.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

828 netsh.exe

pid	process
1292	qgmtykod.exe

pid	process
828	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\vgdatdyo\ImagePath = "C:\\Windows\\SysWOW64\\vgdatdyo\\qgmtykod.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

636 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

qgmtykod.exe

description pid process target process

PID 1292 set thread context of 636 1292 qgmtykod.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

1664 sc.exe
1580 sc.exe
1548 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
636	svchost.exe

description	pid	process	target process
PID 1292 set thread context of 636	1292	qgmtykod.exe	svchost.exe

pid	process
1664	sc.exe
1580	sc.exe
1548	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

file.exeqgmtykod.exe

description	pid	process	target process
PID 1248 wrote to memory of 912	1248	file.exe	cmd.exe
PID 1248 wrote to memory of 912	1248	file.exe	cmd.exe
PID 1248 wrote to memory of 912	1248	file.exe	cmd.exe
PID 1248 wrote to memory of 912	1248	file.exe	cmd.exe
PID 1248 wrote to memory of 1056	1248	file.exe	cmd.exe
PID 1248 wrote to memory of 1056	1248	file.exe	cmd.exe
PID 1248 wrote to memory of 1056	1248	file.exe	cmd.exe
PID 1248 wrote to memory of 1056	1248	file.exe	cmd.exe
PID 1248 wrote to memory of 1664	1248	file.exe	sc.exe
PID 1248 wrote to memory of 1664	1248	file.exe	sc.exe
PID 1248 wrote to memory of 1664	1248	file.exe	sc.exe
PID 1248 wrote to memory of 1664	1248	file.exe	sc.exe
PID 1248 wrote to memory of 1580	1248	file.exe	sc.exe
PID 1248 wrote to memory of 1580	1248	file.exe	sc.exe
PID 1248 wrote to memory of 1580	1248	file.exe	sc.exe
PID 1248 wrote to memory of 1580	1248	file.exe	sc.exe
PID 1248 wrote to memory of 1548	1248	file.exe	sc.exe
PID 1248 wrote to memory of 1548	1248	file.exe	sc.exe
PID 1248 wrote to memory of 1548	1248	file.exe	sc.exe
PID 1248 wrote to memory of 1548	1248	file.exe	sc.exe
PID 1248 wrote to memory of 828	1248	file.exe	netsh.exe
PID 1248 wrote to memory of 828	1248	file.exe	netsh.exe
PID 1248 wrote to memory of 828	1248	file.exe	netsh.exe
PID 1248 wrote to memory of 828	1248	file.exe	netsh.exe
PID 1292 wrote to memory of 636	1292	qgmtykod.exe	svchost.exe
PID 1292 wrote to memory of 636	1292	qgmtykod.exe	svchost.exe
PID 1292 wrote to memory of 636	1292	qgmtykod.exe	svchost.exe
PID 1292 wrote to memory of 636	1292	qgmtykod.exe	svchost.exe
PID 1292 wrote to memory of 636	1292	qgmtykod.exe	svchost.exe
PID 1292 wrote to memory of 636	1292	qgmtykod.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1248

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vgdatdyo\
2⤵
PID:912

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qgmtykod.exe" C:\Windows\SysWOW64\vgdatdyo\
2⤵
PID:1056

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create vgdatdyo binPath= "C:\Windows\SysWOW64\vgdatdyo\qgmtykod.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:1664

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description vgdatdyo "wifi internet conection"
2⤵
- Launches sc.exe
PID:1580

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start vgdatdyo
2⤵
- Launches sc.exe
PID:1548

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:828

C:\Windows\SysWOW64\vgdatdyo\qgmtykod.exe
C:\Windows\SysWOW64\vgdatdyo\qgmtykod.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1292

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Windows security bypass
- Sets service image path in registry
- Deletes itself
PID:636

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\qgmtykod.exe
Filesize
11.2MB

MD5
82f3ed4b2d3ce32cfaed0d69242b6f71

SHA1
7340af312985af4a6cf510ad1665fb23170dbc49

SHA256
06bcc588e3ba46851c38a2d8b8bcf7164470df64372a533a7166377f744593d1

SHA512
bb3084f58b9295203020a4e0bcc8465c6bed07a61c3ab0d05a133d740733608d5000655be4ab6b5cea6ac001ab2acf27c816d258d37f221fb89628d3da2c6490

Download Submit
C:\Windows\SysWOW64\vgdatdyo\qgmtykod.exe
Filesize
11.2MB

MD5
82f3ed4b2d3ce32cfaed0d69242b6f71

SHA1
7340af312985af4a6cf510ad1665fb23170dbc49

SHA256
06bcc588e3ba46851c38a2d8b8bcf7164470df64372a533a7166377f744593d1

SHA512
bb3084f58b9295203020a4e0bcc8465c6bed07a61c3ab0d05a133d740733608d5000655be4ab6b5cea6ac001ab2acf27c816d258d37f221fb89628d3da2c6490

Download Submit
memory/636-80-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/636-78-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/636-72-0x0000000000089A6B-mapping.dmp

Download
memory/636-71-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/636-69-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/828-64-0x0000000000000000-mapping.dmp

Download
memory/912-58-0x0000000000000000-mapping.dmp

Download
memory/1056-59-0x0000000000000000-mapping.dmp

Download
memory/1248-66-0x0000000000400000-0x000000000045C000-memory.dmp

Filesize
368KB

Download
memory/1248-65-0x000000000064A000-0x000000000065F000-memory.dmp

Filesize
84KB

Download
memory/1248-54-0x0000000075351000-0x0000000075353000-memory.dmp

Filesize
8KB

Download
memory/1248-57-0x0000000000400000-0x000000000045C000-memory.dmp

Filesize
368KB

Download
memory/1248-56-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/1248-55-0x000000000064A000-0x000000000065F000-memory.dmp

Filesize
84KB

Download
memory/1292-75-0x0000000000400000-0x000000000045C000-memory.dmp

Filesize
368KB

Download
memory/1292-73-0x000000000057A000-0x000000000058F000-memory.dmp

Filesize
84KB

Download
memory/1548-63-0x0000000000000000-mapping.dmp

Download
memory/1580-62-0x0000000000000000-mapping.dmp

Download
memory/1664-61-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads