tofsee | 25ed67b390cafbd1ebcebed4c9cad13c38e6998c45e501e23d6652ac04bb69ef

General

Target

097bc3c7d6f6f50a503fdb7a56e22a34.exe
Size

312KB
MD5

097bc3c7d6f6f50a503fdb7a56e22a34
SHA1

bc801204c76b73ee9e66a9a7bdffd856965604e0
SHA256

25ed67b390cafbd1ebcebed4c9cad13c38e6998c45e501e23d6652ac04bb69ef
SHA512

7dedbefbe0a0af1d1541374a1a8916eb45d6037c15b8ae36ed28c4dfc0a9d22f5062b584b856b8d32cf5d675f1a718b31b029dc5abcea4c40d8925ae42f05eea
SSDEEP

3072:6AX8ODio3+FCLQbFK+OCQ/KbqAjxBn7UJIdg6hO3Vd+eVRg/5wcw3P3XqT:vPDl5L0FKBDKbzBYd6upvG

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

1916 netsh.exe

pid	process
1916	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\nigembka\ImagePath = "C:\\Windows\\SysWOW64\\nigembka\\ziozxme.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:

097bc3c7d6f6f50a503fdb7a56e22a34.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Control Panel\International\Geo\Nation	097bc3c7d6f6f50a503fdb7a56e22a34.exe

Executes dropped EXE 1 IoCs

Processes:

ziozxme.exe

pid process

2068 ziozxme.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

ziozxme.exe

description pid process target process

PID 2068 set thread context of 4372 2068 ziozxme.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

4956 sc.exe
4188 sc.exe
3832 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid pid_target process target process

3548 1252 WerFault.exe 097bc3c7d6f6f50a503fdb7a56e22a34.exe
3908 2068 WerFault.exe ziozxme.exe

pid	process
2068	ziozxme.exe

description	pid	process	target process
PID 2068 set thread context of 4372	2068	ziozxme.exe	svchost.exe

pid	process
4956	sc.exe
4188	sc.exe
3832	sc.exe

pid	pid_target	process	target process
3548	1252	WerFault.exe	097bc3c7d6f6f50a503fdb7a56e22a34.exe
3908	2068	WerFault.exe	ziozxme.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

097bc3c7d6f6f50a503fdb7a56e22a34.exeziozxme.exe

description	pid	process	target process
PID 1252 wrote to memory of 1036	1252	097bc3c7d6f6f50a503fdb7a56e22a34.exe	cmd.exe
PID 1252 wrote to memory of 1036	1252	097bc3c7d6f6f50a503fdb7a56e22a34.exe	cmd.exe
PID 1252 wrote to memory of 1036	1252	097bc3c7d6f6f50a503fdb7a56e22a34.exe	cmd.exe
PID 1252 wrote to memory of 3480	1252	097bc3c7d6f6f50a503fdb7a56e22a34.exe	cmd.exe
PID 1252 wrote to memory of 3480	1252	097bc3c7d6f6f50a503fdb7a56e22a34.exe	cmd.exe
PID 1252 wrote to memory of 3480	1252	097bc3c7d6f6f50a503fdb7a56e22a34.exe	cmd.exe
PID 1252 wrote to memory of 4956	1252	097bc3c7d6f6f50a503fdb7a56e22a34.exe	sc.exe
PID 1252 wrote to memory of 4956	1252	097bc3c7d6f6f50a503fdb7a56e22a34.exe	sc.exe
PID 1252 wrote to memory of 4956	1252	097bc3c7d6f6f50a503fdb7a56e22a34.exe	sc.exe
PID 1252 wrote to memory of 4188	1252	097bc3c7d6f6f50a503fdb7a56e22a34.exe	sc.exe
PID 1252 wrote to memory of 4188	1252	097bc3c7d6f6f50a503fdb7a56e22a34.exe	sc.exe
PID 1252 wrote to memory of 4188	1252	097bc3c7d6f6f50a503fdb7a56e22a34.exe	sc.exe
PID 1252 wrote to memory of 3832	1252	097bc3c7d6f6f50a503fdb7a56e22a34.exe	sc.exe
PID 1252 wrote to memory of 3832	1252	097bc3c7d6f6f50a503fdb7a56e22a34.exe	sc.exe
PID 1252 wrote to memory of 3832	1252	097bc3c7d6f6f50a503fdb7a56e22a34.exe	sc.exe
PID 1252 wrote to memory of 1916	1252	097bc3c7d6f6f50a503fdb7a56e22a34.exe	netsh.exe
PID 1252 wrote to memory of 1916	1252	097bc3c7d6f6f50a503fdb7a56e22a34.exe	netsh.exe
PID 1252 wrote to memory of 1916	1252	097bc3c7d6f6f50a503fdb7a56e22a34.exe	netsh.exe
PID 2068 wrote to memory of 4372	2068	ziozxme.exe	svchost.exe
PID 2068 wrote to memory of 4372	2068	ziozxme.exe	svchost.exe
PID 2068 wrote to memory of 4372	2068	ziozxme.exe	svchost.exe
PID 2068 wrote to memory of 4372	2068	ziozxme.exe	svchost.exe
PID 2068 wrote to memory of 4372	2068	ziozxme.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\097bc3c7d6f6f50a503fdb7a56e22a34.exe
"C:\Users\Admin\AppData\Local\Temp\097bc3c7d6f6f50a503fdb7a56e22a34.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1252

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\nigembka\
2⤵
PID:1036

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ziozxme.exe" C:\Windows\SysWOW64\nigembka\
2⤵
PID:3480

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create nigembka binPath= "C:\Windows\SysWOW64\nigembka\ziozxme.exe /d\"C:\Users\Admin\AppData\Local\Temp\097bc3c7d6f6f50a503fdb7a56e22a34.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:4956

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description nigembka "wifi internet conection"
2⤵
- Launches sc.exe
PID:4188

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start nigembka
2⤵
- Launches sc.exe
PID:3832

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:1916

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1252 -s 1040
2⤵
- Program crash
PID:3548

C:\Windows\SysWOW64\nigembka\ziozxme.exe
C:\Windows\SysWOW64\nigembka\ziozxme.exe /d"C:\Users\Admin\AppData\Local\Temp\097bc3c7d6f6f50a503fdb7a56e22a34.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2068

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
PID:4372

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2068 -s 516
2⤵
- Program crash
PID:3908

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 1252 -ip 1252
1⤵
PID:4732

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 2068 -ip 2068
1⤵
PID:4672

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\ziozxme.exe
Filesize
12.7MB

MD5
0b0e7d36fd25654ba870fb23d14ad9d5

SHA1
bde86a3a77d80a20b5ef6f75a8337c311161e94d

SHA256
ab806d6a77058281563325a1a933f73a07385c992eadf61cedc4f4b9902f3021

SHA512
f3523194e5ce16d35a8a1a8622754cf5a6cbe493c20cf6e3397f1038cdcc2b22b06f117878a8d76d63128008b4dc66832ffba1fa9ee7ec27c5b8279f69f7a4d7

Download Submit
C:\Windows\SysWOW64\nigembka\ziozxme.exe
Filesize
12.7MB

MD5
0b0e7d36fd25654ba870fb23d14ad9d5

SHA1
bde86a3a77d80a20b5ef6f75a8337c311161e94d

SHA256
ab806d6a77058281563325a1a933f73a07385c992eadf61cedc4f4b9902f3021

SHA512
f3523194e5ce16d35a8a1a8622754cf5a6cbe493c20cf6e3397f1038cdcc2b22b06f117878a8d76d63128008b4dc66832ffba1fa9ee7ec27c5b8279f69f7a4d7

Download Submit
memory/1252-134-0x00000000007B0000-0x00000000007C3000-memory.dmp

Filesize
76KB

Download
memory/1252-136-0x0000000000400000-0x00000000006E9000-memory.dmp

Filesize
2.9MB

Download
memory/1252-139-0x00000000007B0000-0x00000000007C3000-memory.dmp

Filesize
76KB

Download
memory/1252-144-0x0000000000400000-0x00000000006E9000-memory.dmp

Filesize
2.9MB

Download
memory/2068-145-0x0000000000400000-0x00000000006E9000-memory.dmp

Filesize
2.9MB

Download
memory/2068-152-0x0000000000400000-0x00000000006E9000-memory.dmp

Filesize
2.9MB

Download
memory/4372-147-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/4372-150-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/4372-151-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/4372-153-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/4372-155-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads