tofsee | 1b66f5287e70ab31b12e42bfad9d69ca94e4e8025cc4c3ece1d254be0bf787e9

General

Target

1b66f5287e70ab31b12e42bfad9d69ca94e4e8025cc4c3ece1d254be0bf787e9.exe
Size

139KB
MD5

fb7d171df11ed3ea9adb990ccf967208
SHA1

d3c44eceea18a017840136bb48d1c4147a41f83c
SHA256

1b66f5287e70ab31b12e42bfad9d69ca94e4e8025cc4c3ece1d254be0bf787e9
SHA512

bd28b24e596ff7438cad0836b256826842be84c14387ca970d78de984bafe0e58e9b57b883e9369629afcf797bcb88b968a7abb3f2b7b19d47b2f4790c23af55

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:

trfrsnlr.exe

pid process

4344 trfrsnlr.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

3340 netsh.exe

pid	process
4344	trfrsnlr.exe

pid	process
3340	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\ldfkzapa\ImagePath = "C:\\Windows\\SysWOW64\\ldfkzapa\\trfrsnlr.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:

1b66f5287e70ab31b12e42bfad9d69ca94e4e8025cc4c3ece1d254be0bf787e9.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Control Panel\International\Geo\Nation	1b66f5287e70ab31b12e42bfad9d69ca94e4e8025cc4c3ece1d254be0bf787e9.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

trfrsnlr.exe

description pid process target process

PID 4344 set thread context of 4512 4344 trfrsnlr.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

2388 sc.exe
5020 sc.exe
2708 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 4344 set thread context of 4512	4344	trfrsnlr.exe	svchost.exe

pid	process
2388	sc.exe
5020	sc.exe
2708	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

1b66f5287e70ab31b12e42bfad9d69ca94e4e8025cc4c3ece1d254be0bf787e9.exetrfrsnlr.exe

description	pid	process	target process
PID 3000 wrote to memory of 4240	3000	1b66f5287e70ab31b12e42bfad9d69ca94e4e8025cc4c3ece1d254be0bf787e9.exe	cmd.exe
PID 3000 wrote to memory of 4240	3000	1b66f5287e70ab31b12e42bfad9d69ca94e4e8025cc4c3ece1d254be0bf787e9.exe	cmd.exe
PID 3000 wrote to memory of 4240	3000	1b66f5287e70ab31b12e42bfad9d69ca94e4e8025cc4c3ece1d254be0bf787e9.exe	cmd.exe
PID 3000 wrote to memory of 4340	3000	1b66f5287e70ab31b12e42bfad9d69ca94e4e8025cc4c3ece1d254be0bf787e9.exe	cmd.exe
PID 3000 wrote to memory of 4340	3000	1b66f5287e70ab31b12e42bfad9d69ca94e4e8025cc4c3ece1d254be0bf787e9.exe	cmd.exe
PID 3000 wrote to memory of 4340	3000	1b66f5287e70ab31b12e42bfad9d69ca94e4e8025cc4c3ece1d254be0bf787e9.exe	cmd.exe
PID 3000 wrote to memory of 2388	3000	1b66f5287e70ab31b12e42bfad9d69ca94e4e8025cc4c3ece1d254be0bf787e9.exe	sc.exe
PID 3000 wrote to memory of 2388	3000	1b66f5287e70ab31b12e42bfad9d69ca94e4e8025cc4c3ece1d254be0bf787e9.exe	sc.exe
PID 3000 wrote to memory of 2388	3000	1b66f5287e70ab31b12e42bfad9d69ca94e4e8025cc4c3ece1d254be0bf787e9.exe	sc.exe
PID 3000 wrote to memory of 5020	3000	1b66f5287e70ab31b12e42bfad9d69ca94e4e8025cc4c3ece1d254be0bf787e9.exe	sc.exe
PID 3000 wrote to memory of 5020	3000	1b66f5287e70ab31b12e42bfad9d69ca94e4e8025cc4c3ece1d254be0bf787e9.exe	sc.exe
PID 3000 wrote to memory of 5020	3000	1b66f5287e70ab31b12e42bfad9d69ca94e4e8025cc4c3ece1d254be0bf787e9.exe	sc.exe
PID 3000 wrote to memory of 2708	3000	1b66f5287e70ab31b12e42bfad9d69ca94e4e8025cc4c3ece1d254be0bf787e9.exe	sc.exe
PID 3000 wrote to memory of 2708	3000	1b66f5287e70ab31b12e42bfad9d69ca94e4e8025cc4c3ece1d254be0bf787e9.exe	sc.exe
PID 3000 wrote to memory of 2708	3000	1b66f5287e70ab31b12e42bfad9d69ca94e4e8025cc4c3ece1d254be0bf787e9.exe	sc.exe
PID 3000 wrote to memory of 3340	3000	1b66f5287e70ab31b12e42bfad9d69ca94e4e8025cc4c3ece1d254be0bf787e9.exe	netsh.exe
PID 3000 wrote to memory of 3340	3000	1b66f5287e70ab31b12e42bfad9d69ca94e4e8025cc4c3ece1d254be0bf787e9.exe	netsh.exe
PID 3000 wrote to memory of 3340	3000	1b66f5287e70ab31b12e42bfad9d69ca94e4e8025cc4c3ece1d254be0bf787e9.exe	netsh.exe
PID 4344 wrote to memory of 4512	4344	trfrsnlr.exe	svchost.exe
PID 4344 wrote to memory of 4512	4344	trfrsnlr.exe	svchost.exe
PID 4344 wrote to memory of 4512	4344	trfrsnlr.exe	svchost.exe
PID 4344 wrote to memory of 4512	4344	trfrsnlr.exe	svchost.exe
PID 4344 wrote to memory of 4512	4344	trfrsnlr.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\1b66f5287e70ab31b12e42bfad9d69ca94e4e8025cc4c3ece1d254be0bf787e9.exe
"C:\Users\Admin\AppData\Local\Temp\1b66f5287e70ab31b12e42bfad9d69ca94e4e8025cc4c3ece1d254be0bf787e9.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3000

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ldfkzapa\
2⤵
PID:4240

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\trfrsnlr.exe" C:\Windows\SysWOW64\ldfkzapa\
2⤵
PID:4340

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create ldfkzapa binPath= "C:\Windows\SysWOW64\ldfkzapa\trfrsnlr.exe /d\"C:\Users\Admin\AppData\Local\Temp\1b66f5287e70ab31b12e42bfad9d69ca94e4e8025cc4c3ece1d254be0bf787e9.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:2388

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description ldfkzapa "wifi internet conection"
2⤵
- Launches sc.exe
PID:5020

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start ldfkzapa
2⤵
- Launches sc.exe
PID:2708

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:3340

C:\Windows\SysWOW64\ldfkzapa\trfrsnlr.exe
C:\Windows\SysWOW64\ldfkzapa\trfrsnlr.exe /d"C:\Users\Admin\AppData\Local\Temp\1b66f5287e70ab31b12e42bfad9d69ca94e4e8025cc4c3ece1d254be0bf787e9.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4344

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
PID:4512

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\trfrsnlr.exe
Filesize
10.7MB

MD5
80a352ff9919c987146218ae943d6112

SHA1
a68c62c00b20e0622e70840fad412be61603b2b4

SHA256
226e33bf4d996454ed323cc239ed6c55474236950c047a1f0ad59b5a35ca2140

SHA512
f1b02fde65107e26510bddd307b180dcec1d41b13f3ad085f6f264800789f0c63e17a42cc4c56477b7a38b46a3973d3a731036136bc743a907878b4a58660d1a

Download Submit
C:\Windows\SysWOW64\ldfkzapa\trfrsnlr.exe
Filesize
10.7MB

MD5
80a352ff9919c987146218ae943d6112

SHA1
a68c62c00b20e0622e70840fad412be61603b2b4

SHA256
226e33bf4d996454ed323cc239ed6c55474236950c047a1f0ad59b5a35ca2140

SHA512
f1b02fde65107e26510bddd307b180dcec1d41b13f3ad085f6f264800789f0c63e17a42cc4c56477b7a38b46a3973d3a731036136bc743a907878b4a58660d1a

Download Submit
memory/2388-134-0x0000000000000000-mapping.dmp

Download
memory/2708-136-0x0000000000000000-mapping.dmp

Download
memory/3000-130-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/3340-137-0x0000000000000000-mapping.dmp

Download
memory/4240-131-0x0000000000000000-mapping.dmp

Download
memory/4340-132-0x0000000000000000-mapping.dmp

Download
memory/4344-139-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/4512-140-0x0000000000000000-mapping.dmp

Download
memory/4512-141-0x0000000000EB0000-0x0000000000EC5000-memory.dmp

Filesize
84KB

Download
memory/4512-144-0x0000000000EB0000-0x0000000000EC5000-memory.dmp

Filesize
84KB

Download
memory/4512-145-0x0000000000EB0000-0x0000000000EC5000-memory.dmp

Filesize
84KB

Download
memory/5020-135-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads