tofsee | 23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855

General

Target

23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe
Size

101KB
MD5

fc3b31c8214d209f6783baedfbfd514b
SHA1

f457e855dea420e7ae69129d1437b31c33b78d25
SHA256

23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855
SHA512

6232c34e88c1da8fd9d13cd6c81bce59b7552ade20d2e0df736334ae96f9501eb1e63f4f3dbc207e8096c7e3a2111db2c73067c84b50a6da2a62285c789d7eb4

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\evdefbyz = "0"	svchost.exe

Creates new service(s) 1 TTPs
persistence

New Service
T1050
Executes dropped EXE 1 IoCs

Processes:

ehppnlpy.exe

pid process

928 ehppnlpy.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

1656 netsh.exe

pid	process
928	ehppnlpy.exe

pid	process
1656	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\evdefbyz\ImagePath = "C:\\Windows\\SysWOW64\\evdefbyz\\ehppnlpy.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

1748 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

ehppnlpy.exe

description pid process target process

PID 928 set thread context of 1748 928 ehppnlpy.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

240 sc.exe
1756 sc.exe
1692 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
1748	svchost.exe

description	pid	process	target process
PID 928 set thread context of 1748	928	ehppnlpy.exe	svchost.exe

pid	process
240	sc.exe
1756	sc.exe
1692	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exeehppnlpy.exe

description	pid	process	target process
PID 1884 wrote to memory of 1580	1884	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	cmd.exe
PID 1884 wrote to memory of 1580	1884	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	cmd.exe
PID 1884 wrote to memory of 1580	1884	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	cmd.exe
PID 1884 wrote to memory of 1580	1884	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	cmd.exe
PID 1884 wrote to memory of 1632	1884	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	cmd.exe
PID 1884 wrote to memory of 1632	1884	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	cmd.exe
PID 1884 wrote to memory of 1632	1884	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	cmd.exe
PID 1884 wrote to memory of 1632	1884	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	cmd.exe
PID 1884 wrote to memory of 240	1884	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	sc.exe
PID 1884 wrote to memory of 240	1884	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	sc.exe
PID 1884 wrote to memory of 240	1884	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	sc.exe
PID 1884 wrote to memory of 240	1884	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	sc.exe
PID 1884 wrote to memory of 1756	1884	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	sc.exe
PID 1884 wrote to memory of 1756	1884	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	sc.exe
PID 1884 wrote to memory of 1756	1884	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	sc.exe
PID 1884 wrote to memory of 1756	1884	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	sc.exe
PID 1884 wrote to memory of 1692	1884	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	sc.exe
PID 1884 wrote to memory of 1692	1884	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	sc.exe
PID 1884 wrote to memory of 1692	1884	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	sc.exe
PID 1884 wrote to memory of 1692	1884	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	sc.exe
PID 1884 wrote to memory of 1656	1884	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	netsh.exe
PID 1884 wrote to memory of 1656	1884	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	netsh.exe
PID 1884 wrote to memory of 1656	1884	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	netsh.exe
PID 1884 wrote to memory of 1656	1884	23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe	netsh.exe
PID 928 wrote to memory of 1748	928	ehppnlpy.exe	svchost.exe
PID 928 wrote to memory of 1748	928	ehppnlpy.exe	svchost.exe
PID 928 wrote to memory of 1748	928	ehppnlpy.exe	svchost.exe
PID 928 wrote to memory of 1748	928	ehppnlpy.exe	svchost.exe
PID 928 wrote to memory of 1748	928	ehppnlpy.exe	svchost.exe
PID 928 wrote to memory of 1748	928	ehppnlpy.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe
"C:\Users\Admin\AppData\Local\Temp\23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1884

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\evdefbyz\
2⤵
PID:1580

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ehppnlpy.exe" C:\Windows\SysWOW64\evdefbyz\
2⤵
PID:1632

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create evdefbyz binPath= "C:\Windows\SysWOW64\evdefbyz\ehppnlpy.exe /d\"C:\Users\Admin\AppData\Local\Temp\23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:240

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description evdefbyz "wifi internet conection"
2⤵
- Launches sc.exe
PID:1756

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start evdefbyz
2⤵
- Launches sc.exe
PID:1692

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:1656

C:\Windows\SysWOW64\evdefbyz\ehppnlpy.exe
C:\Windows\SysWOW64\evdefbyz\ehppnlpy.exe /d"C:\Users\Admin\AppData\Local\Temp\23197502be28aab6501b23608fd0f3d82bbf096fd990db91f6bbfc1dc41ff855.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:928

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Windows security bypass
- Sets service image path in registry
- Deletes itself
PID:1748

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\ehppnlpy.exe
Filesize
11.7MB

MD5
0a501128a0c00067d1f32ac9aca86dc2

SHA1
040311600372bf4ebe4e180624e06ee8f617ff29

SHA256
987268e7b9bc6aba3e3665b434467a376e892af33ef16e19554f64257cb135da

SHA512
0b067548d8ae0d25141a67106752157122afaf3438e15f45c98fde683ce28ba43448fe66826cef25a93405f98072e0acdd36c1d815f9c68ab2976f1897969b0c

Download Submit
C:\Windows\SysWOW64\evdefbyz\ehppnlpy.exe
Filesize
11.7MB

MD5
0a501128a0c00067d1f32ac9aca86dc2

SHA1
040311600372bf4ebe4e180624e06ee8f617ff29

SHA256
987268e7b9bc6aba3e3665b434467a376e892af33ef16e19554f64257cb135da

SHA512
0b067548d8ae0d25141a67106752157122afaf3438e15f45c98fde683ce28ba43448fe66826cef25a93405f98072e0acdd36c1d815f9c68ab2976f1897969b0c

Download Submit
memory/240-59-0x0000000000000000-mapping.dmp

Download
memory/928-63-0x0000000000400000-0x000000000041D000-memory.dmp

Filesize
116KB

Download
memory/1580-56-0x0000000000000000-mapping.dmp

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

Download
memory/1656-65-0x0000000000000000-mapping.dmp

Download
memory/1692-61-0x0000000000000000-mapping.dmp

Download
memory/1748-66-0x0000000000110000-0x0000000000125000-memory.dmp

Filesize
84KB

Download
memory/1748-68-0x0000000000110000-0x0000000000125000-memory.dmp

Filesize
84KB

Download
memory/1748-69-0x0000000000119A6B-mapping.dmp

Download
memory/1748-72-0x0000000000110000-0x0000000000125000-memory.dmp

Filesize
84KB

Download
memory/1748-73-0x0000000000110000-0x0000000000125000-memory.dmp

Filesize
84KB

Download
memory/1748-75-0x0000000000110000-0x0000000000125000-memory.dmp

Filesize
84KB

Download
memory/1756-60-0x0000000000000000-mapping.dmp

Download
memory/1884-54-0x0000000000400000-0x000000000041D000-memory.dmp

Filesize
116KB

Download
memory/1884-55-0x00000000759E1000-0x00000000759E3000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads