tofsee | 3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc

General

Target

3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe
Size

262KB
MD5

f0a0aad635dfaf849e931d305893f282
SHA1

1501b1f501b1ba2d3b42555f8292e32bd9c00268
SHA256

3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc
SHA512

26f7773e81fdd30fd86cac6b6ded11333f1f95cc1a7d8301d535a1ead16cda38368c96a5fee0fa927197118458a57b442ddf446ce7fe0f1531f3c3b50e2ac96f

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

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\xuhsefdn = "0"	svchost.exe

Creates new service(s) 1 TTPs
persistence

New Service
T1050
Executes dropped EXE 1 IoCs

Processes:

bwdazwst.exe

pid process

1092 bwdazwst.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

564 netsh.exe

pid	process
1092	bwdazwst.exe

pid	process
564	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\xuhsefdn\ImagePath = "C:\\Windows\\SysWOW64\\xuhsefdn\\bwdazwst.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

616 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

bwdazwst.exe

description pid process target process

PID 1092 set thread context of 616 1092 bwdazwst.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

1552 sc.exe
1892 sc.exe
560 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
616	svchost.exe

description	pid	process	target process
PID 1092 set thread context of 616	1092	bwdazwst.exe	svchost.exe

pid	process
1552	sc.exe
1892	sc.exe
560	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exebwdazwst.exe

description	pid	process	target process
PID 2004 wrote to memory of 1632	2004	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	cmd.exe
PID 2004 wrote to memory of 1632	2004	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	cmd.exe
PID 2004 wrote to memory of 1632	2004	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	cmd.exe
PID 2004 wrote to memory of 1632	2004	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	cmd.exe
PID 2004 wrote to memory of 1708	2004	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	cmd.exe
PID 2004 wrote to memory of 1708	2004	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	cmd.exe
PID 2004 wrote to memory of 1708	2004	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	cmd.exe
PID 2004 wrote to memory of 1708	2004	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	cmd.exe
PID 2004 wrote to memory of 1552	2004	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	sc.exe
PID 2004 wrote to memory of 1552	2004	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	sc.exe
PID 2004 wrote to memory of 1552	2004	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	sc.exe
PID 2004 wrote to memory of 1552	2004	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	sc.exe
PID 2004 wrote to memory of 1892	2004	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	sc.exe
PID 2004 wrote to memory of 1892	2004	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	sc.exe
PID 2004 wrote to memory of 1892	2004	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	sc.exe
PID 2004 wrote to memory of 1892	2004	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	sc.exe
PID 2004 wrote to memory of 560	2004	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	sc.exe
PID 2004 wrote to memory of 560	2004	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	sc.exe
PID 2004 wrote to memory of 560	2004	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	sc.exe
PID 2004 wrote to memory of 560	2004	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	sc.exe
PID 2004 wrote to memory of 564	2004	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	netsh.exe
PID 2004 wrote to memory of 564	2004	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	netsh.exe
PID 2004 wrote to memory of 564	2004	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	netsh.exe
PID 2004 wrote to memory of 564	2004	3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe	netsh.exe
PID 1092 wrote to memory of 616	1092	bwdazwst.exe	svchost.exe
PID 1092 wrote to memory of 616	1092	bwdazwst.exe	svchost.exe
PID 1092 wrote to memory of 616	1092	bwdazwst.exe	svchost.exe
PID 1092 wrote to memory of 616	1092	bwdazwst.exe	svchost.exe
PID 1092 wrote to memory of 616	1092	bwdazwst.exe	svchost.exe
PID 1092 wrote to memory of 616	1092	bwdazwst.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe
"C:\Users\Admin\AppData\Local\Temp\3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2004

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xuhsefdn\
2⤵
PID:1632

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bwdazwst.exe" C:\Windows\SysWOW64\xuhsefdn\
2⤵
PID:1708

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create xuhsefdn binPath= "C:\Windows\SysWOW64\xuhsefdn\bwdazwst.exe /d\"C:\Users\Admin\AppData\Local\Temp\3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:1552

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description xuhsefdn "wifi internet conection"
2⤵
- Launches sc.exe
PID:1892

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start xuhsefdn
2⤵
- Launches sc.exe
PID:560

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:564

C:\Windows\SysWOW64\xuhsefdn\bwdazwst.exe
C:\Windows\SysWOW64\xuhsefdn\bwdazwst.exe /d"C:\Users\Admin\AppData\Local\Temp\3f73b53edc186f0fccb07ac7c9bbffb5b22e8625585388661fd7ee4836d84ccc.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1092

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Windows security bypass
- Sets service image path in registry
- Deletes itself
PID:616

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\bwdazwst.exe
Filesize
13.9MB

MD5
1daf52ede9b7eac4bc92e7b9ec5c9def

SHA1
093c4c5e1c8ceef86a6fd93c813f058aa00d8c2f

SHA256
41066305112137ed4fa3430f326e15505fae29b15ef52b7bd22124abb7162b14

SHA512
4f58327975c8c0c86fbe6b6701a49a6f17a2f94a0022b49434966e8d481a1b0de664bf37104f41ee922e777d69925954e2890877836e232b1e912b1799b1310d

Download Submit
C:\Windows\SysWOW64\xuhsefdn\bwdazwst.exe
Filesize
13.9MB

MD5
1daf52ede9b7eac4bc92e7b9ec5c9def

SHA1
093c4c5e1c8ceef86a6fd93c813f058aa00d8c2f

SHA256
41066305112137ed4fa3430f326e15505fae29b15ef52b7bd22124abb7162b14

SHA512
4f58327975c8c0c86fbe6b6701a49a6f17a2f94a0022b49434966e8d481a1b0de664bf37104f41ee922e777d69925954e2890877836e232b1e912b1799b1310d

Download Submit
memory/560-63-0x0000000000000000-mapping.dmp

Download
memory/564-64-0x0000000000000000-mapping.dmp

Download
memory/616-74-0x0000000000089A6B-mapping.dmp

Download
memory/616-81-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/616-80-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/616-71-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/616-73-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1092-77-0x0000000000400000-0x0000000000463000-memory.dmp

Filesize
396KB

Download
memory/1092-75-0x000000000029F000-0x00000000002AF000-memory.dmp

Filesize
64KB

Download
memory/1092-69-0x000000000029F000-0x00000000002AF000-memory.dmp

Filesize
64KB

Download
memory/1552-61-0x0000000000000000-mapping.dmp

Download
memory/1632-57-0x0000000000000000-mapping.dmp

Download
memory/1708-58-0x0000000000000000-mapping.dmp

Download
memory/1892-62-0x0000000000000000-mapping.dmp

Download
memory/2004-55-0x000000000060F000-0x000000000061F000-memory.dmp

Filesize
64KB

Download
memory/2004-65-0x000000000060F000-0x000000000061F000-memory.dmp

Filesize
64KB

Download
memory/2004-66-0x0000000000400000-0x0000000000463000-memory.dmp

Filesize
396KB

Download
memory/2004-54-0x000000000060F000-0x000000000061F000-memory.dmp

Filesize
64KB

Download
memory/2004-56-0x0000000075521000-0x0000000075523000-memory.dmp

Filesize
8KB

Download
memory/2004-60-0x0000000000400000-0x0000000000463000-memory.dmp

Filesize
396KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads