tofsee | 36dd37703b6b84eb31184299be5935fd79e46b4c7b9a3f7c2bbdd73a9bedb701

General

Target

36dd37703b6b84eb31184299be5935fd79e46b4c7b9a3f7c2bbdd73a9bedb701.exe
Size

108KB
MD5

3a7c9b7345930efda1b033b5ffd6888c
SHA1

cce9d9ece4bbf8666894d3d52ba3bcf243140a12
SHA256

36dd37703b6b84eb31184299be5935fd79e46b4c7b9a3f7c2bbdd73a9bedb701
SHA512

8b76eba6a981f493b1afac3a39d62f2c91eb1919dcb439f9d9b6aa86bce20e8c66c7a91f33d0f64244cde8c974a5cffe70384320db388b71d268f9e3938d0d9a

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.ru

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:

zbwneyfy.exe

pid process

1968 zbwneyfy.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

1548 netsh.exe

pid	process
1968	zbwneyfy.exe

pid	process
1548	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\bkbmtzds\ImagePath = "C:\\Windows\\SysWOW64\\bkbmtzds\\zbwneyfy.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

1252 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

zbwneyfy.exe

description pid process target process

PID 1968 set thread context of 1252 1968 zbwneyfy.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

544 sc.exe
1016 sc.exe
588 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
1252	svchost.exe

description	pid	process	target process
PID 1968 set thread context of 1252	1968	zbwneyfy.exe	svchost.exe

pid	process
544	sc.exe
1016	sc.exe
588	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

36dd37703b6b84eb31184299be5935fd79e46b4c7b9a3f7c2bbdd73a9bedb701.exezbwneyfy.exe

description	pid	process	target process
PID 1344 wrote to memory of 628	1344	36dd37703b6b84eb31184299be5935fd79e46b4c7b9a3f7c2bbdd73a9bedb701.exe	cmd.exe
PID 1344 wrote to memory of 628	1344	36dd37703b6b84eb31184299be5935fd79e46b4c7b9a3f7c2bbdd73a9bedb701.exe	cmd.exe
PID 1344 wrote to memory of 628	1344	36dd37703b6b84eb31184299be5935fd79e46b4c7b9a3f7c2bbdd73a9bedb701.exe	cmd.exe
PID 1344 wrote to memory of 628	1344	36dd37703b6b84eb31184299be5935fd79e46b4c7b9a3f7c2bbdd73a9bedb701.exe	cmd.exe
PID 1344 wrote to memory of 956	1344	36dd37703b6b84eb31184299be5935fd79e46b4c7b9a3f7c2bbdd73a9bedb701.exe	cmd.exe
PID 1344 wrote to memory of 956	1344	36dd37703b6b84eb31184299be5935fd79e46b4c7b9a3f7c2bbdd73a9bedb701.exe	cmd.exe
PID 1344 wrote to memory of 956	1344	36dd37703b6b84eb31184299be5935fd79e46b4c7b9a3f7c2bbdd73a9bedb701.exe	cmd.exe
PID 1344 wrote to memory of 956	1344	36dd37703b6b84eb31184299be5935fd79e46b4c7b9a3f7c2bbdd73a9bedb701.exe	cmd.exe
PID 1344 wrote to memory of 1016	1344	36dd37703b6b84eb31184299be5935fd79e46b4c7b9a3f7c2bbdd73a9bedb701.exe	sc.exe
PID 1344 wrote to memory of 1016	1344	36dd37703b6b84eb31184299be5935fd79e46b4c7b9a3f7c2bbdd73a9bedb701.exe	sc.exe
PID 1344 wrote to memory of 1016	1344	36dd37703b6b84eb31184299be5935fd79e46b4c7b9a3f7c2bbdd73a9bedb701.exe	sc.exe
PID 1344 wrote to memory of 1016	1344	36dd37703b6b84eb31184299be5935fd79e46b4c7b9a3f7c2bbdd73a9bedb701.exe	sc.exe
PID 1344 wrote to memory of 588	1344	36dd37703b6b84eb31184299be5935fd79e46b4c7b9a3f7c2bbdd73a9bedb701.exe	sc.exe
PID 1344 wrote to memory of 588	1344	36dd37703b6b84eb31184299be5935fd79e46b4c7b9a3f7c2bbdd73a9bedb701.exe	sc.exe
PID 1344 wrote to memory of 588	1344	36dd37703b6b84eb31184299be5935fd79e46b4c7b9a3f7c2bbdd73a9bedb701.exe	sc.exe
PID 1344 wrote to memory of 588	1344	36dd37703b6b84eb31184299be5935fd79e46b4c7b9a3f7c2bbdd73a9bedb701.exe	sc.exe
PID 1344 wrote to memory of 544	1344	36dd37703b6b84eb31184299be5935fd79e46b4c7b9a3f7c2bbdd73a9bedb701.exe	sc.exe
PID 1344 wrote to memory of 544	1344	36dd37703b6b84eb31184299be5935fd79e46b4c7b9a3f7c2bbdd73a9bedb701.exe	sc.exe
PID 1344 wrote to memory of 544	1344	36dd37703b6b84eb31184299be5935fd79e46b4c7b9a3f7c2bbdd73a9bedb701.exe	sc.exe
PID 1344 wrote to memory of 544	1344	36dd37703b6b84eb31184299be5935fd79e46b4c7b9a3f7c2bbdd73a9bedb701.exe	sc.exe
PID 1344 wrote to memory of 1548	1344	36dd37703b6b84eb31184299be5935fd79e46b4c7b9a3f7c2bbdd73a9bedb701.exe	netsh.exe
PID 1344 wrote to memory of 1548	1344	36dd37703b6b84eb31184299be5935fd79e46b4c7b9a3f7c2bbdd73a9bedb701.exe	netsh.exe
PID 1344 wrote to memory of 1548	1344	36dd37703b6b84eb31184299be5935fd79e46b4c7b9a3f7c2bbdd73a9bedb701.exe	netsh.exe
PID 1344 wrote to memory of 1548	1344	36dd37703b6b84eb31184299be5935fd79e46b4c7b9a3f7c2bbdd73a9bedb701.exe	netsh.exe
PID 1968 wrote to memory of 1252	1968	zbwneyfy.exe	svchost.exe
PID 1968 wrote to memory of 1252	1968	zbwneyfy.exe	svchost.exe
PID 1968 wrote to memory of 1252	1968	zbwneyfy.exe	svchost.exe
PID 1968 wrote to memory of 1252	1968	zbwneyfy.exe	svchost.exe
PID 1968 wrote to memory of 1252	1968	zbwneyfy.exe	svchost.exe
PID 1968 wrote to memory of 1252	1968	zbwneyfy.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\36dd37703b6b84eb31184299be5935fd79e46b4c7b9a3f7c2bbdd73a9bedb701.exe
"C:\Users\Admin\AppData\Local\Temp\36dd37703b6b84eb31184299be5935fd79e46b4c7b9a3f7c2bbdd73a9bedb701.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1344

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bkbmtzds\
2⤵
PID:628

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zbwneyfy.exe" C:\Windows\SysWOW64\bkbmtzds\
2⤵
PID:956

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create bkbmtzds binPath= "C:\Windows\SysWOW64\bkbmtzds\zbwneyfy.exe /d\"C:\Users\Admin\AppData\Local\Temp\36dd37703b6b84eb31184299be5935fd79e46b4c7b9a3f7c2bbdd73a9bedb701.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:1016

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description bkbmtzds "wifi internet conection"
2⤵
- Launches sc.exe
PID:588

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start bkbmtzds
2⤵
- Launches sc.exe
PID:544

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:1548

C:\Windows\SysWOW64\bkbmtzds\zbwneyfy.exe
C:\Windows\SysWOW64\bkbmtzds\zbwneyfy.exe /d"C:\Users\Admin\AppData\Local\Temp\36dd37703b6b84eb31184299be5935fd79e46b4c7b9a3f7c2bbdd73a9bedb701.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1968

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
- Deletes itself
PID:1252

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\zbwneyfy.exe
Filesize
13.2MB

MD5
ae7f9d39ec2151c89f32230617f551bd

SHA1
b64500a31cc7c2926dd2a8a148189688e264c950

SHA256
686c349e04a669c336298cd7eb69cc242ff459a6806eecad87c3a8fbbbac0b37

SHA512
da3129d4b8117e45e83adfdd6c4948f5301cabaf253926c89b557c0013e00f9ef3872846da3b55d49eee7cf596d404807c0692a7aaed545521d35a4397197d37

Download Submit
C:\Windows\SysWOW64\bkbmtzds\zbwneyfy.exe
Filesize
13.2MB

MD5
ae7f9d39ec2151c89f32230617f551bd

SHA1
b64500a31cc7c2926dd2a8a148189688e264c950

SHA256
686c349e04a669c336298cd7eb69cc242ff459a6806eecad87c3a8fbbbac0b37

SHA512
da3129d4b8117e45e83adfdd6c4948f5301cabaf253926c89b557c0013e00f9ef3872846da3b55d49eee7cf596d404807c0692a7aaed545521d35a4397197d37

Download Submit
memory/544-63-0x0000000000000000-mapping.dmp

Download
memory/588-62-0x0000000000000000-mapping.dmp

Download
memory/628-58-0x0000000000000000-mapping.dmp

Download
memory/956-59-0x0000000000000000-mapping.dmp

Download
memory/1016-61-0x0000000000000000-mapping.dmp

Download
memory/1252-70-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1252-72-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1252-73-0x0000000000089A6B-mapping.dmp

Download
memory/1252-78-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1252-80-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1344-57-0x0000000076171000-0x0000000076173000-memory.dmp

Filesize
8KB

Download
memory/1344-56-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/1344-65-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/1344-55-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/1344-54-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/1548-64-0x0000000000000000-mapping.dmp

Download
memory/1968-67-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/1968-74-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download

Analysis

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