tofsee | d289352c7a93aa0c2405c0f8b81162937680262984b90d27b018ba7096952219

General

Target

file.exe
Size

349KB
MD5

f085b97a4a86e373cfee621309149f70
SHA1

ea6c5f117b22fdbc40c80292eca1be2b2e03c27a
SHA256

d289352c7a93aa0c2405c0f8b81162937680262984b90d27b018ba7096952219
SHA512

7436bbe8b50fe75fc64b84de62b4abf2edc6935c50693a7df44e85ec0cb0ec372daf26587a9f810b93d7dd1f5a42cb1ef1fc7587fe76be16e489be63de024da5
SSDEEP

3072:9RZr18aXVLB9+mTtq5qcns2e9/ajB03AJfPg4asOVxFJ4trhIh3eGjMgG1ao5Lc:VOEVLr+mTnIe9/ajm8ngoa94BuRjMgU

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\iguncjl = "0"	svchost.exe

Creates new service(s) 1 TTPs
persistence

New Service
T1050
Executes dropped EXE 1 IoCs

Processes:

cwmdgehq.exe

pid process

1472 cwmdgehq.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

980 netsh.exe

pid	process
1472	cwmdgehq.exe

pid	process
980	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\iguncjl\ImagePath = "C:\\Windows\\SysWOW64\\iguncjl\\cwmdgehq.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

1648 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

cwmdgehq.exe

description pid process target process

PID 1472 set thread context of 1648 1472 cwmdgehq.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

660 sc.exe
1728 sc.exe
1724 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
1648	svchost.exe

description	pid	process	target process
PID 1472 set thread context of 1648	1472	cwmdgehq.exe	svchost.exe

pid	process
660	sc.exe
1728	sc.exe
1724	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

file.execwmdgehq.exe

description	pid	process	target process
PID 1376 wrote to memory of 1948	1376	file.exe	cmd.exe
PID 1376 wrote to memory of 1948	1376	file.exe	cmd.exe
PID 1376 wrote to memory of 1948	1376	file.exe	cmd.exe
PID 1376 wrote to memory of 1948	1376	file.exe	cmd.exe
PID 1376 wrote to memory of 1296	1376	file.exe	cmd.exe
PID 1376 wrote to memory of 1296	1376	file.exe	cmd.exe
PID 1376 wrote to memory of 1296	1376	file.exe	cmd.exe
PID 1376 wrote to memory of 1296	1376	file.exe	cmd.exe
PID 1376 wrote to memory of 660	1376	file.exe	sc.exe
PID 1376 wrote to memory of 660	1376	file.exe	sc.exe
PID 1376 wrote to memory of 660	1376	file.exe	sc.exe
PID 1376 wrote to memory of 660	1376	file.exe	sc.exe
PID 1376 wrote to memory of 1728	1376	file.exe	sc.exe
PID 1376 wrote to memory of 1728	1376	file.exe	sc.exe
PID 1376 wrote to memory of 1728	1376	file.exe	sc.exe
PID 1376 wrote to memory of 1728	1376	file.exe	sc.exe
PID 1376 wrote to memory of 1724	1376	file.exe	sc.exe
PID 1376 wrote to memory of 1724	1376	file.exe	sc.exe
PID 1376 wrote to memory of 1724	1376	file.exe	sc.exe
PID 1376 wrote to memory of 1724	1376	file.exe	sc.exe
PID 1376 wrote to memory of 980	1376	file.exe	netsh.exe
PID 1376 wrote to memory of 980	1376	file.exe	netsh.exe
PID 1376 wrote to memory of 980	1376	file.exe	netsh.exe
PID 1376 wrote to memory of 980	1376	file.exe	netsh.exe
PID 1472 wrote to memory of 1648	1472	cwmdgehq.exe	svchost.exe
PID 1472 wrote to memory of 1648	1472	cwmdgehq.exe	svchost.exe
PID 1472 wrote to memory of 1648	1472	cwmdgehq.exe	svchost.exe
PID 1472 wrote to memory of 1648	1472	cwmdgehq.exe	svchost.exe
PID 1472 wrote to memory of 1648	1472	cwmdgehq.exe	svchost.exe
PID 1472 wrote to memory of 1648	1472	cwmdgehq.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:1376

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\iguncjl\
2⤵
PID:1948

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\cwmdgehq.exe" C:\Windows\SysWOW64\iguncjl\
2⤵
PID:1296

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create iguncjl binPath= "C:\Windows\SysWOW64\iguncjl\cwmdgehq.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:660

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description iguncjl "wifi internet conection"
2⤵
- Launches sc.exe
PID:1728

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start iguncjl
2⤵
- Launches sc.exe
PID:1724

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:980

C:\Windows\SysWOW64\iguncjl\cwmdgehq.exe
C:\Windows\SysWOW64\iguncjl\cwmdgehq.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1472

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Windows security bypass
- Sets service image path in registry
- Deletes itself
PID:1648

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\cwmdgehq.exe
Filesize
13.6MB

MD5
8d8d6f01d8c9bacaf98708c59f9e9cff

SHA1
e4463b679269d355d100ed1cb1453f29e2ed2d46

SHA256
b7326f0cf1646a40019b949fcda5fdde5fded06c7d5a1c43b1bf9b1210513eeb

SHA512
99c7cfa7e2890301229de945209804814bfc5394e1c8671884222587a5df67c893aca164920d14dd43ddf6dcfc9eb33646752b379ae5f2c35c583088a8bce993

Download Submit
C:\Windows\SysWOW64\iguncjl\cwmdgehq.exe
Filesize
13.6MB

MD5
8d8d6f01d8c9bacaf98708c59f9e9cff

SHA1
e4463b679269d355d100ed1cb1453f29e2ed2d46

SHA256
b7326f0cf1646a40019b949fcda5fdde5fded06c7d5a1c43b1bf9b1210513eeb

SHA512
99c7cfa7e2890301229de945209804814bfc5394e1c8671884222587a5df67c893aca164920d14dd43ddf6dcfc9eb33646752b379ae5f2c35c583088a8bce993

Download Submit
memory/660-61-0x0000000000000000-mapping.dmp

Download
memory/980-64-0x0000000000000000-mapping.dmp

Download
memory/1296-59-0x0000000000000000-mapping.dmp

Download
memory/1376-65-0x00000000005FA000-0x000000000060F000-memory.dmp

Filesize
84KB

Download
memory/1376-54-0x0000000075091000-0x0000000075093000-memory.dmp

Filesize
8KB

Download
memory/1376-57-0x0000000000400000-0x000000000045C000-memory.dmp

Filesize
368KB

Download
memory/1376-55-0x00000000005FA000-0x000000000060F000-memory.dmp

Filesize
84KB

Download
memory/1376-66-0x0000000000400000-0x000000000045C000-memory.dmp

Filesize
368KB

Download
memory/1376-56-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/1472-76-0x000000000050A000-0x000000000051F000-memory.dmp

Filesize
84KB

Download
memory/1472-77-0x0000000000400000-0x000000000045C000-memory.dmp

Filesize
368KB

Download
memory/1648-70-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1648-73-0x0000000000089A6B-mapping.dmp

Download
memory/1648-72-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1648-79-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1648-80-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1724-63-0x0000000000000000-mapping.dmp

Download
memory/1728-62-0x0000000000000000-mapping.dmp

Download
memory/1948-58-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads