tofsee | 2892fcb514031795be8f62a7c309a5fe80279066517fd8bd219f2e0f31fb4042

General

Target

2892fcb514031795be8f62a7c309a5fe80279066517fd8bd219f2e0f31fb4042.exe
Size

142KB
MD5

8ae987e80e12b61362f37b47ea603a71
SHA1

29a2d26bf4d8a74d4ded2bba39af14e2af83016e
SHA256

2892fcb514031795be8f62a7c309a5fe80279066517fd8bd219f2e0f31fb4042
SHA512

d47df314643d82af87feb43f79ae5fef1ad61aa449755d0d73abee307bdc93fbcb53529c7fe8039e7bfb051d8041b084b3efd00d868377881b6c46b86c0f6ef7

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:

lgkmpyxj.exe

pid process

1532 lgkmpyxj.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

5080 netsh.exe

pid	process
1532	lgkmpyxj.exe

pid	process
5080	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\ojpsykyg\ImagePath = "C:\\Windows\\SysWOW64\\ojpsykyg\\lgkmpyxj.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:

2892fcb514031795be8f62a7c309a5fe80279066517fd8bd219f2e0f31fb4042.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Control Panel\International\Geo\Nation	2892fcb514031795be8f62a7c309a5fe80279066517fd8bd219f2e0f31fb4042.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

lgkmpyxj.exe

description pid process target process

PID 1532 set thread context of 2016 1532 lgkmpyxj.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

4352 sc.exe
4244 sc.exe
4528 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 1532 set thread context of 2016	1532	lgkmpyxj.exe	svchost.exe

pid	process
4352	sc.exe
4244	sc.exe
4528	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

2892fcb514031795be8f62a7c309a5fe80279066517fd8bd219f2e0f31fb4042.exelgkmpyxj.exe

description	pid	process	target process
PID 2100 wrote to memory of 4116	2100	2892fcb514031795be8f62a7c309a5fe80279066517fd8bd219f2e0f31fb4042.exe	cmd.exe
PID 2100 wrote to memory of 4116	2100	2892fcb514031795be8f62a7c309a5fe80279066517fd8bd219f2e0f31fb4042.exe	cmd.exe
PID 2100 wrote to memory of 4116	2100	2892fcb514031795be8f62a7c309a5fe80279066517fd8bd219f2e0f31fb4042.exe	cmd.exe
PID 2100 wrote to memory of 4016	2100	2892fcb514031795be8f62a7c309a5fe80279066517fd8bd219f2e0f31fb4042.exe	cmd.exe
PID 2100 wrote to memory of 4016	2100	2892fcb514031795be8f62a7c309a5fe80279066517fd8bd219f2e0f31fb4042.exe	cmd.exe
PID 2100 wrote to memory of 4016	2100	2892fcb514031795be8f62a7c309a5fe80279066517fd8bd219f2e0f31fb4042.exe	cmd.exe
PID 2100 wrote to memory of 4352	2100	2892fcb514031795be8f62a7c309a5fe80279066517fd8bd219f2e0f31fb4042.exe	sc.exe
PID 2100 wrote to memory of 4352	2100	2892fcb514031795be8f62a7c309a5fe80279066517fd8bd219f2e0f31fb4042.exe	sc.exe
PID 2100 wrote to memory of 4352	2100	2892fcb514031795be8f62a7c309a5fe80279066517fd8bd219f2e0f31fb4042.exe	sc.exe
PID 2100 wrote to memory of 4244	2100	2892fcb514031795be8f62a7c309a5fe80279066517fd8bd219f2e0f31fb4042.exe	sc.exe
PID 2100 wrote to memory of 4244	2100	2892fcb514031795be8f62a7c309a5fe80279066517fd8bd219f2e0f31fb4042.exe	sc.exe
PID 2100 wrote to memory of 4244	2100	2892fcb514031795be8f62a7c309a5fe80279066517fd8bd219f2e0f31fb4042.exe	sc.exe
PID 2100 wrote to memory of 4528	2100	2892fcb514031795be8f62a7c309a5fe80279066517fd8bd219f2e0f31fb4042.exe	sc.exe
PID 2100 wrote to memory of 4528	2100	2892fcb514031795be8f62a7c309a5fe80279066517fd8bd219f2e0f31fb4042.exe	sc.exe
PID 2100 wrote to memory of 4528	2100	2892fcb514031795be8f62a7c309a5fe80279066517fd8bd219f2e0f31fb4042.exe	sc.exe
PID 2100 wrote to memory of 5080	2100	2892fcb514031795be8f62a7c309a5fe80279066517fd8bd219f2e0f31fb4042.exe	netsh.exe
PID 2100 wrote to memory of 5080	2100	2892fcb514031795be8f62a7c309a5fe80279066517fd8bd219f2e0f31fb4042.exe	netsh.exe
PID 2100 wrote to memory of 5080	2100	2892fcb514031795be8f62a7c309a5fe80279066517fd8bd219f2e0f31fb4042.exe	netsh.exe
PID 1532 wrote to memory of 2016	1532	lgkmpyxj.exe	svchost.exe
PID 1532 wrote to memory of 2016	1532	lgkmpyxj.exe	svchost.exe
PID 1532 wrote to memory of 2016	1532	lgkmpyxj.exe	svchost.exe
PID 1532 wrote to memory of 2016	1532	lgkmpyxj.exe	svchost.exe
PID 1532 wrote to memory of 2016	1532	lgkmpyxj.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\2892fcb514031795be8f62a7c309a5fe80279066517fd8bd219f2e0f31fb4042.exe
"C:\Users\Admin\AppData\Local\Temp\2892fcb514031795be8f62a7c309a5fe80279066517fd8bd219f2e0f31fb4042.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2100

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ojpsykyg\
2⤵
PID:4116

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\lgkmpyxj.exe" C:\Windows\SysWOW64\ojpsykyg\
2⤵
PID:4016

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create ojpsykyg binPath= "C:\Windows\SysWOW64\ojpsykyg\lgkmpyxj.exe /d\"C:\Users\Admin\AppData\Local\Temp\2892fcb514031795be8f62a7c309a5fe80279066517fd8bd219f2e0f31fb4042.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:4352

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description ojpsykyg "wifi internet conection"
2⤵
- Launches sc.exe
PID:4244

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start ojpsykyg
2⤵
- Launches sc.exe
PID:4528

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:5080

C:\Windows\SysWOW64\ojpsykyg\lgkmpyxj.exe
C:\Windows\SysWOW64\ojpsykyg\lgkmpyxj.exe /d"C:\Users\Admin\AppData\Local\Temp\2892fcb514031795be8f62a7c309a5fe80279066517fd8bd219f2e0f31fb4042.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1532

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
PID:2016

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

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\lgkmpyxj.exe
Filesize
11.7MB

MD5
fd1473282cb5fc781c8535727eebc6d8

SHA1
e9a86a8725a80bd2487b0cb538129cd68f627b3e

SHA256
12188bded9269716903f646684eee84fc9fdff27f9d57a89d36554ab8628cb8b

SHA512
67b788e39366713f1dca66b769dfa0c80af4979202ecf36bc15e2f4a46ae471f1fd0579b76b0e34d25dce3285731095c8f124e62b16dbf73c9026073185842ee

Download Submit
C:\Windows\SysWOW64\ojpsykyg\lgkmpyxj.exe
Filesize
11.7MB

MD5
fd1473282cb5fc781c8535727eebc6d8

SHA1
e9a86a8725a80bd2487b0cb538129cd68f627b3e

SHA256
12188bded9269716903f646684eee84fc9fdff27f9d57a89d36554ab8628cb8b

SHA512
67b788e39366713f1dca66b769dfa0c80af4979202ecf36bc15e2f4a46ae471f1fd0579b76b0e34d25dce3285731095c8f124e62b16dbf73c9026073185842ee

Download Submit
memory/1532-139-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/2016-140-0x0000000000000000-mapping.dmp

Download
memory/2016-141-0x0000000001250000-0x0000000001265000-memory.dmp

Filesize
84KB

Download
memory/2016-144-0x0000000001250000-0x0000000001265000-memory.dmp

Filesize
84KB

Download
memory/2016-145-0x0000000001250000-0x0000000001265000-memory.dmp

Filesize
84KB

Download
memory/2100-130-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/4016-132-0x0000000000000000-mapping.dmp

Download
memory/4116-131-0x0000000000000000-mapping.dmp

Download
memory/4244-135-0x0000000000000000-mapping.dmp

Download
memory/4352-134-0x0000000000000000-mapping.dmp

Download
memory/4528-136-0x0000000000000000-mapping.dmp

Download
memory/5080-138-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads