tofsee | ae103a988f889f4120a5d21bdf08d4ff41588c26c4efab1c604cab29dc5632a2

General

Target

ae103a988f889f4120a5d21bdf08d4ff41588c26c4efab1c604cab29dc5632a2.exe
Size

178KB
MD5

faca2fb4b7df8b02263be3f101775d8d
SHA1

1ee11a0311a1507b66d76b668eaa1806794692a7
SHA256

ae103a988f889f4120a5d21bdf08d4ff41588c26c4efab1c604cab29dc5632a2
SHA512

3f8dd1204b45afb76df8137f1a46a40a6b53c3bf98b80959724d27bc1da1e1e48fb28c18ebbb4940b30ac6b98e1b04f4ccb937e7a9b836802bfbea903a88ff7c
SSDEEP

3072:knSQXMYrEDcw6d5QWBhf7RBkDuaad402UlVDYJ5V2RBB2Wk2:mDEDcwdYJRBSuld40vYJ5yB

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
Creates new service(s) 1 TTPs
persistence

New Service
T1050
Executes dropped EXE 1 IoCs

Processes:

vkyvouqt.exe

pid process

4068 vkyvouqt.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

204 netsh.exe

pid	process
4068	vkyvouqt.exe

pid	process
204	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\ayfwlmht\ImagePath = "C:\\Windows\\SysWOW64\\ayfwlmht\\vkyvouqt.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:

ae103a988f889f4120a5d21bdf08d4ff41588c26c4efab1c604cab29dc5632a2.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	ae103a988f889f4120a5d21bdf08d4ff41588c26c4efab1c604cab29dc5632a2.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

vkyvouqt.exe

description pid process target process

PID 4068 set thread context of 4712 4068 vkyvouqt.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

1996 sc.exe
3556 sc.exe
5084 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

description	pid	process	target process
PID 4068 set thread context of 4712	4068	vkyvouqt.exe	svchost.exe

pid	process
1996	sc.exe
3556	sc.exe
5084	sc.exe

Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid	pid_target	process	target process
5056	4984	WerFault.exe	ae103a988f889f4120a5d21bdf08d4ff41588c26c4efab1c604cab29dc5632a2.exe
1504	4068	WerFault.exe	vkyvouqt.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

ae103a988f889f4120a5d21bdf08d4ff41588c26c4efab1c604cab29dc5632a2.exevkyvouqt.exe

description	pid	process	target process
PID 4984 wrote to memory of 1832	4984	ae103a988f889f4120a5d21bdf08d4ff41588c26c4efab1c604cab29dc5632a2.exe	cmd.exe
PID 4984 wrote to memory of 1832	4984	ae103a988f889f4120a5d21bdf08d4ff41588c26c4efab1c604cab29dc5632a2.exe	cmd.exe
PID 4984 wrote to memory of 1832	4984	ae103a988f889f4120a5d21bdf08d4ff41588c26c4efab1c604cab29dc5632a2.exe	cmd.exe
PID 4984 wrote to memory of 756	4984	ae103a988f889f4120a5d21bdf08d4ff41588c26c4efab1c604cab29dc5632a2.exe	cmd.exe
PID 4984 wrote to memory of 756	4984	ae103a988f889f4120a5d21bdf08d4ff41588c26c4efab1c604cab29dc5632a2.exe	cmd.exe
PID 4984 wrote to memory of 756	4984	ae103a988f889f4120a5d21bdf08d4ff41588c26c4efab1c604cab29dc5632a2.exe	cmd.exe
PID 4984 wrote to memory of 5084	4984	ae103a988f889f4120a5d21bdf08d4ff41588c26c4efab1c604cab29dc5632a2.exe	sc.exe
PID 4984 wrote to memory of 5084	4984	ae103a988f889f4120a5d21bdf08d4ff41588c26c4efab1c604cab29dc5632a2.exe	sc.exe
PID 4984 wrote to memory of 5084	4984	ae103a988f889f4120a5d21bdf08d4ff41588c26c4efab1c604cab29dc5632a2.exe	sc.exe
PID 4984 wrote to memory of 1996	4984	ae103a988f889f4120a5d21bdf08d4ff41588c26c4efab1c604cab29dc5632a2.exe	sc.exe
PID 4984 wrote to memory of 1996	4984	ae103a988f889f4120a5d21bdf08d4ff41588c26c4efab1c604cab29dc5632a2.exe	sc.exe
PID 4984 wrote to memory of 1996	4984	ae103a988f889f4120a5d21bdf08d4ff41588c26c4efab1c604cab29dc5632a2.exe	sc.exe
PID 4984 wrote to memory of 3556	4984	ae103a988f889f4120a5d21bdf08d4ff41588c26c4efab1c604cab29dc5632a2.exe	sc.exe
PID 4984 wrote to memory of 3556	4984	ae103a988f889f4120a5d21bdf08d4ff41588c26c4efab1c604cab29dc5632a2.exe	sc.exe
PID 4984 wrote to memory of 3556	4984	ae103a988f889f4120a5d21bdf08d4ff41588c26c4efab1c604cab29dc5632a2.exe	sc.exe
PID 4984 wrote to memory of 204	4984	ae103a988f889f4120a5d21bdf08d4ff41588c26c4efab1c604cab29dc5632a2.exe	netsh.exe
PID 4984 wrote to memory of 204	4984	ae103a988f889f4120a5d21bdf08d4ff41588c26c4efab1c604cab29dc5632a2.exe	netsh.exe
PID 4984 wrote to memory of 204	4984	ae103a988f889f4120a5d21bdf08d4ff41588c26c4efab1c604cab29dc5632a2.exe	netsh.exe
PID 4068 wrote to memory of 4712	4068	vkyvouqt.exe	svchost.exe
PID 4068 wrote to memory of 4712	4068	vkyvouqt.exe	svchost.exe
PID 4068 wrote to memory of 4712	4068	vkyvouqt.exe	svchost.exe
PID 4068 wrote to memory of 4712	4068	vkyvouqt.exe	svchost.exe
PID 4068 wrote to memory of 4712	4068	vkyvouqt.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\ae103a988f889f4120a5d21bdf08d4ff41588c26c4efab1c604cab29dc5632a2.exe
"C:\Users\Admin\AppData\Local\Temp\ae103a988f889f4120a5d21bdf08d4ff41588c26c4efab1c604cab29dc5632a2.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4984

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ayfwlmht\
2⤵
PID:1832

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vkyvouqt.exe" C:\Windows\SysWOW64\ayfwlmht\
2⤵
PID:756

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create ayfwlmht binPath= "C:\Windows\SysWOW64\ayfwlmht\vkyvouqt.exe /d\"C:\Users\Admin\AppData\Local\Temp\ae103a988f889f4120a5d21bdf08d4ff41588c26c4efab1c604cab29dc5632a2.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:5084

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description ayfwlmht "wifi internet conection"
2⤵
- Launches sc.exe
PID:1996

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start ayfwlmht
2⤵
- Launches sc.exe
PID:3556

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:204

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4984 -s 1240
2⤵
- Program crash
PID:5056

C:\Windows\SysWOW64\ayfwlmht\vkyvouqt.exe
C:\Windows\SysWOW64\ayfwlmht\vkyvouqt.exe /d"C:\Users\Admin\AppData\Local\Temp\ae103a988f889f4120a5d21bdf08d4ff41588c26c4efab1c604cab29dc5632a2.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4068

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
PID:4712

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4068 -s 556
2⤵
- Program crash
PID:1504

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4984 -ip 4984
1⤵
PID:4372

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 4068 -ip 4068
1⤵
PID:3924

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\vkyvouqt.exe
Filesize
12.9MB

MD5
7b8c48e8679b731c59b2a4d908da796e

SHA1
fba276324dd218c480823c5be408354065d69ff8

SHA256
7be8715711b08a7bcff90db64d34fe0f24e81e843a0945da90e9931a156dbe45

SHA512
63a895fcf459068a7da02ba7040b78d9887812db66023003540ecf251ccd3b7a58a667283aef8ec8e3584bfafc9162f0389ce9221371442abad6b582637f6800

Download Submit
C:\Windows\SysWOW64\ayfwlmht\vkyvouqt.exe
Filesize
12.9MB

MD5
7b8c48e8679b731c59b2a4d908da796e

SHA1
fba276324dd218c480823c5be408354065d69ff8

SHA256
7be8715711b08a7bcff90db64d34fe0f24e81e843a0945da90e9931a156dbe45

SHA512
63a895fcf459068a7da02ba7040b78d9887812db66023003540ecf251ccd3b7a58a667283aef8ec8e3584bfafc9162f0389ce9221371442abad6b582637f6800

Download Submit
memory/204-142-0x0000000000000000-mapping.dmp

Download
memory/756-136-0x0000000000000000-mapping.dmp

Download
memory/1832-135-0x0000000000000000-mapping.dmp

Download
memory/1996-139-0x0000000000000000-mapping.dmp

Download
memory/3556-140-0x0000000000000000-mapping.dmp

Download
memory/4068-148-0x00000000007E8000-0x00000000007F9000-memory.dmp

Filesize
68KB

Download
memory/4068-149-0x0000000000400000-0x000000000070E000-memory.dmp

Filesize
3.1MB

Download
memory/4712-144-0x0000000000000000-mapping.dmp

Download
memory/4712-145-0x00000000008C0000-0x00000000008D5000-memory.dmp

Filesize
84KB

Download
memory/4712-150-0x00000000008C0000-0x00000000008D5000-memory.dmp

Filesize
84KB

Download
memory/4712-151-0x00000000008C0000-0x00000000008D5000-memory.dmp

Filesize
84KB

Download
memory/4984-133-0x0000000002440000-0x0000000002453000-memory.dmp

Filesize
76KB

Download
memory/4984-134-0x0000000000400000-0x000000000070E000-memory.dmp

Filesize
3.1MB

Download
memory/4984-132-0x000000000080E000-0x000000000081E000-memory.dmp

Filesize
64KB

Download
memory/4984-143-0x0000000000400000-0x000000000070E000-memory.dmp

Filesize
3.1MB

Download
memory/5084-138-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads