tofsee | 8f9bb3a7266ab5b9b69efdccfc4b08caf510f30e7a01a1d28f071d8c51fae2d8

General

Target

8f9bb3a7266ab5b9b69efdccfc4b08caf510f30e7a01a1d28f071d8c51fae2d8.exe
Size

147KB
MD5

4d83d22a9fc1239d934e267867d666d9
SHA1

c4a6f3a568f4c9a07db50ca8abc44efad63bccb2
SHA256

8f9bb3a7266ab5b9b69efdccfc4b08caf510f30e7a01a1d28f071d8c51fae2d8
SHA512

7d847890dffa9c581f875caed61c89e744fc72cb27c2d387ef15af6d8e4d08d6cad3182facc9b00c7c5a37202c22d542d474c43c424fa8d662496d0f75c6100c
SSDEEP

3072:sKw5vmdLlF5bH/moJM0lVvg/dsopnRLjkYAfA+kbRpg:kmd1ffJ7ldEWot2fOp

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:

zluihdmr.exe

pid process

4056 zluihdmr.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

2824 netsh.exe

pid	process
4056	zluihdmr.exe

pid	process
2824	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\nordkegh\ImagePath = "C:\\Windows\\SysWOW64\\nordkegh\\zluihdmr.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:

8f9bb3a7266ab5b9b69efdccfc4b08caf510f30e7a01a1d28f071d8c51fae2d8.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	8f9bb3a7266ab5b9b69efdccfc4b08caf510f30e7a01a1d28f071d8c51fae2d8.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

zluihdmr.exe

description pid process target process

PID 4056 set thread context of 232 4056 zluihdmr.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

2244 sc.exe
1208 sc.exe
1504 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 4056 set thread context of 232	4056	zluihdmr.exe	svchost.exe

pid	process
2244	sc.exe
1208	sc.exe
1504	sc.exe

Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid	pid_target	process	target process
2024	2168	WerFault.exe	8f9bb3a7266ab5b9b69efdccfc4b08caf510f30e7a01a1d28f071d8c51fae2d8.exe
3676	4056	WerFault.exe	zluihdmr.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

8f9bb3a7266ab5b9b69efdccfc4b08caf510f30e7a01a1d28f071d8c51fae2d8.exezluihdmr.exe

description	pid	process	target process
PID 2168 wrote to memory of 4868	2168	8f9bb3a7266ab5b9b69efdccfc4b08caf510f30e7a01a1d28f071d8c51fae2d8.exe	cmd.exe
PID 2168 wrote to memory of 4868	2168	8f9bb3a7266ab5b9b69efdccfc4b08caf510f30e7a01a1d28f071d8c51fae2d8.exe	cmd.exe
PID 2168 wrote to memory of 4868	2168	8f9bb3a7266ab5b9b69efdccfc4b08caf510f30e7a01a1d28f071d8c51fae2d8.exe	cmd.exe
PID 2168 wrote to memory of 2732	2168	8f9bb3a7266ab5b9b69efdccfc4b08caf510f30e7a01a1d28f071d8c51fae2d8.exe	cmd.exe
PID 2168 wrote to memory of 2732	2168	8f9bb3a7266ab5b9b69efdccfc4b08caf510f30e7a01a1d28f071d8c51fae2d8.exe	cmd.exe
PID 2168 wrote to memory of 2732	2168	8f9bb3a7266ab5b9b69efdccfc4b08caf510f30e7a01a1d28f071d8c51fae2d8.exe	cmd.exe
PID 2168 wrote to memory of 2244	2168	8f9bb3a7266ab5b9b69efdccfc4b08caf510f30e7a01a1d28f071d8c51fae2d8.exe	sc.exe
PID 2168 wrote to memory of 2244	2168	8f9bb3a7266ab5b9b69efdccfc4b08caf510f30e7a01a1d28f071d8c51fae2d8.exe	sc.exe
PID 2168 wrote to memory of 2244	2168	8f9bb3a7266ab5b9b69efdccfc4b08caf510f30e7a01a1d28f071d8c51fae2d8.exe	sc.exe
PID 2168 wrote to memory of 1208	2168	8f9bb3a7266ab5b9b69efdccfc4b08caf510f30e7a01a1d28f071d8c51fae2d8.exe	sc.exe
PID 2168 wrote to memory of 1208	2168	8f9bb3a7266ab5b9b69efdccfc4b08caf510f30e7a01a1d28f071d8c51fae2d8.exe	sc.exe
PID 2168 wrote to memory of 1208	2168	8f9bb3a7266ab5b9b69efdccfc4b08caf510f30e7a01a1d28f071d8c51fae2d8.exe	sc.exe
PID 2168 wrote to memory of 1504	2168	8f9bb3a7266ab5b9b69efdccfc4b08caf510f30e7a01a1d28f071d8c51fae2d8.exe	sc.exe
PID 2168 wrote to memory of 1504	2168	8f9bb3a7266ab5b9b69efdccfc4b08caf510f30e7a01a1d28f071d8c51fae2d8.exe	sc.exe
PID 2168 wrote to memory of 1504	2168	8f9bb3a7266ab5b9b69efdccfc4b08caf510f30e7a01a1d28f071d8c51fae2d8.exe	sc.exe
PID 2168 wrote to memory of 2824	2168	8f9bb3a7266ab5b9b69efdccfc4b08caf510f30e7a01a1d28f071d8c51fae2d8.exe	netsh.exe
PID 2168 wrote to memory of 2824	2168	8f9bb3a7266ab5b9b69efdccfc4b08caf510f30e7a01a1d28f071d8c51fae2d8.exe	netsh.exe
PID 2168 wrote to memory of 2824	2168	8f9bb3a7266ab5b9b69efdccfc4b08caf510f30e7a01a1d28f071d8c51fae2d8.exe	netsh.exe
PID 4056 wrote to memory of 232	4056	zluihdmr.exe	svchost.exe
PID 4056 wrote to memory of 232	4056	zluihdmr.exe	svchost.exe
PID 4056 wrote to memory of 232	4056	zluihdmr.exe	svchost.exe
PID 4056 wrote to memory of 232	4056	zluihdmr.exe	svchost.exe
PID 4056 wrote to memory of 232	4056	zluihdmr.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\8f9bb3a7266ab5b9b69efdccfc4b08caf510f30e7a01a1d28f071d8c51fae2d8.exe
"C:\Users\Admin\AppData\Local\Temp\8f9bb3a7266ab5b9b69efdccfc4b08caf510f30e7a01a1d28f071d8c51fae2d8.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2168

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\nordkegh\
2⤵
PID:4868

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zluihdmr.exe" C:\Windows\SysWOW64\nordkegh\
2⤵
PID:2732

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create nordkegh binPath= "C:\Windows\SysWOW64\nordkegh\zluihdmr.exe /d\"C:\Users\Admin\AppData\Local\Temp\8f9bb3a7266ab5b9b69efdccfc4b08caf510f30e7a01a1d28f071d8c51fae2d8.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:2244

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description nordkegh "wifi internet conection"
2⤵
- Launches sc.exe
PID:1208

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start nordkegh
2⤵
- Launches sc.exe
PID:1504

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:2824

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2168 -s 1036
2⤵
- Program crash
PID:2024

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2168 -ip 2168
1⤵
PID:1128

C:\Windows\SysWOW64\nordkegh\zluihdmr.exe
C:\Windows\SysWOW64\nordkegh\zluihdmr.exe /d"C:\Users\Admin\AppData\Local\Temp\8f9bb3a7266ab5b9b69efdccfc4b08caf510f30e7a01a1d28f071d8c51fae2d8.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4056

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
PID:232

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4056 -s 508
2⤵
- Program crash
PID:3676

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 4056 -ip 4056
1⤵
PID:116

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

New Service

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

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\zluihdmr.exe
Filesize
14.6MB

MD5
6f76568ed4e2eae559834b2478cbf5b8

SHA1
797b29c5f129f835f05832c348b70fe81a1747af

SHA256
fcadcca914a2171c3c6b094c74859287c92ec667e48e012dbcd35186310648d4

SHA512
fc9cea4d8db9dd21f721c4c5f00c01e1c09f443b8a2db67a734f57af241a237f70feeeead43735b9fc72541a3b05496370273ec1aaa98e08160a0c8447fb9ef2

Download Submit
C:\Windows\SysWOW64\nordkegh\zluihdmr.exe
Filesize
14.6MB

MD5
6f76568ed4e2eae559834b2478cbf5b8

SHA1
797b29c5f129f835f05832c348b70fe81a1747af

SHA256
fcadcca914a2171c3c6b094c74859287c92ec667e48e012dbcd35186310648d4

SHA512
fc9cea4d8db9dd21f721c4c5f00c01e1c09f443b8a2db67a734f57af241a237f70feeeead43735b9fc72541a3b05496370273ec1aaa98e08160a0c8447fb9ef2

Download Submit
memory/232-151-0x00000000003C0000-0x00000000003D5000-memory.dmp

Filesize
84KB

Download
memory/232-143-0x0000000000000000-mapping.dmp

Download
memory/232-144-0x00000000003C0000-0x00000000003D5000-memory.dmp

Filesize
84KB

Download
memory/232-153-0x00000000003C0000-0x00000000003D5000-memory.dmp

Filesize
84KB

Download
memory/1208-139-0x0000000000000000-mapping.dmp

Download
memory/1504-140-0x0000000000000000-mapping.dmp

Download
memory/2168-148-0x0000000000C80000-0x0000000000C93000-memory.dmp

Filesize
76KB

Download
memory/2168-133-0x0000000000C80000-0x0000000000C93000-memory.dmp

Filesize
76KB

Download
memory/2168-147-0x0000000000CDE000-0x0000000000CEE000-memory.dmp

Filesize
64KB

Download
memory/2168-134-0x0000000000400000-0x0000000000AD6000-memory.dmp

Filesize
6.8MB

Download
memory/2168-152-0x0000000000400000-0x0000000000AD6000-memory.dmp

Filesize
6.8MB

Download
memory/2168-132-0x0000000000CDE000-0x0000000000CEE000-memory.dmp

Filesize
64KB

Download
memory/2244-138-0x0000000000000000-mapping.dmp

Download
memory/2732-136-0x0000000000000000-mapping.dmp

Download
memory/2824-141-0x0000000000000000-mapping.dmp

Download
memory/4056-149-0x0000000000B18000-0x0000000000B29000-memory.dmp

Filesize
68KB

Download
memory/4056-150-0x0000000000400000-0x0000000000AD6000-memory.dmp

Filesize
6.8MB

Download
memory/4868-135-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads