tofsee | 5ff6edb9d95818ca99a6d559c287552009a4af4e943592d79a0f42efb44671aa

General

Target

5ff6edb9d95818ca99a6d559c287552009a4af4e943592d79a0f42efb44671aa.exe
Size

171KB
MD5

210e538a95d8fd1b5737c7116ec602de
SHA1

f10933e1bfabe35fb3b50ebb825726b467a0a829
SHA256

5ff6edb9d95818ca99a6d559c287552009a4af4e943592d79a0f42efb44671aa
SHA512

79365f9b368fbff7b1d00821b1850e589987d70a1589949195fd3b084c9dea0658e83e6c50f2c8887386184f4c925f1de88746d47fe1f675aa6bd0e431867bbe

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:

gohxczrb.exe

pid process

2348 gohxczrb.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

1496 netsh.exe

pid	process
2348	gohxczrb.exe

pid	process
1496	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\maqjaoyj\ImagePath = "C:\\Windows\\SysWOW64\\maqjaoyj\\gohxczrb.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:

5ff6edb9d95818ca99a6d559c287552009a4af4e943592d79a0f42efb44671aa.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2660308776-3705150086-26593515-1000\Control Panel\International\Geo\Nation	5ff6edb9d95818ca99a6d559c287552009a4af4e943592d79a0f42efb44671aa.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

gohxczrb.exe

description pid process target process

PID 2348 set thread context of 5040 2348 gohxczrb.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

2900 sc.exe
3496 sc.exe
3476 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 2348 set thread context of 5040	2348	gohxczrb.exe	svchost.exe

pid	process
2900	sc.exe
3496	sc.exe
3476	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

5ff6edb9d95818ca99a6d559c287552009a4af4e943592d79a0f42efb44671aa.exegohxczrb.exe

description	pid	process	target process
PID 2220 wrote to memory of 912	2220	5ff6edb9d95818ca99a6d559c287552009a4af4e943592d79a0f42efb44671aa.exe	cmd.exe
PID 2220 wrote to memory of 912	2220	5ff6edb9d95818ca99a6d559c287552009a4af4e943592d79a0f42efb44671aa.exe	cmd.exe
PID 2220 wrote to memory of 912	2220	5ff6edb9d95818ca99a6d559c287552009a4af4e943592d79a0f42efb44671aa.exe	cmd.exe
PID 2220 wrote to memory of 2356	2220	5ff6edb9d95818ca99a6d559c287552009a4af4e943592d79a0f42efb44671aa.exe	cmd.exe
PID 2220 wrote to memory of 2356	2220	5ff6edb9d95818ca99a6d559c287552009a4af4e943592d79a0f42efb44671aa.exe	cmd.exe
PID 2220 wrote to memory of 2356	2220	5ff6edb9d95818ca99a6d559c287552009a4af4e943592d79a0f42efb44671aa.exe	cmd.exe
PID 2220 wrote to memory of 2900	2220	5ff6edb9d95818ca99a6d559c287552009a4af4e943592d79a0f42efb44671aa.exe	sc.exe
PID 2220 wrote to memory of 2900	2220	5ff6edb9d95818ca99a6d559c287552009a4af4e943592d79a0f42efb44671aa.exe	sc.exe
PID 2220 wrote to memory of 2900	2220	5ff6edb9d95818ca99a6d559c287552009a4af4e943592d79a0f42efb44671aa.exe	sc.exe
PID 2220 wrote to memory of 3496	2220	5ff6edb9d95818ca99a6d559c287552009a4af4e943592d79a0f42efb44671aa.exe	sc.exe
PID 2220 wrote to memory of 3496	2220	5ff6edb9d95818ca99a6d559c287552009a4af4e943592d79a0f42efb44671aa.exe	sc.exe
PID 2220 wrote to memory of 3496	2220	5ff6edb9d95818ca99a6d559c287552009a4af4e943592d79a0f42efb44671aa.exe	sc.exe
PID 2220 wrote to memory of 3476	2220	5ff6edb9d95818ca99a6d559c287552009a4af4e943592d79a0f42efb44671aa.exe	sc.exe
PID 2220 wrote to memory of 3476	2220	5ff6edb9d95818ca99a6d559c287552009a4af4e943592d79a0f42efb44671aa.exe	sc.exe
PID 2220 wrote to memory of 3476	2220	5ff6edb9d95818ca99a6d559c287552009a4af4e943592d79a0f42efb44671aa.exe	sc.exe
PID 2220 wrote to memory of 1496	2220	5ff6edb9d95818ca99a6d559c287552009a4af4e943592d79a0f42efb44671aa.exe	netsh.exe
PID 2220 wrote to memory of 1496	2220	5ff6edb9d95818ca99a6d559c287552009a4af4e943592d79a0f42efb44671aa.exe	netsh.exe
PID 2220 wrote to memory of 1496	2220	5ff6edb9d95818ca99a6d559c287552009a4af4e943592d79a0f42efb44671aa.exe	netsh.exe
PID 2348 wrote to memory of 5040	2348	gohxczrb.exe	svchost.exe
PID 2348 wrote to memory of 5040	2348	gohxczrb.exe	svchost.exe
PID 2348 wrote to memory of 5040	2348	gohxczrb.exe	svchost.exe
PID 2348 wrote to memory of 5040	2348	gohxczrb.exe	svchost.exe
PID 2348 wrote to memory of 5040	2348	gohxczrb.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\5ff6edb9d95818ca99a6d559c287552009a4af4e943592d79a0f42efb44671aa.exe
"C:\Users\Admin\AppData\Local\Temp\5ff6edb9d95818ca99a6d559c287552009a4af4e943592d79a0f42efb44671aa.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2220

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\maqjaoyj\
2⤵
PID:912

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gohxczrb.exe" C:\Windows\SysWOW64\maqjaoyj\
2⤵
PID:2356

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create maqjaoyj binPath= "C:\Windows\SysWOW64\maqjaoyj\gohxczrb.exe /d\"C:\Users\Admin\AppData\Local\Temp\5ff6edb9d95818ca99a6d559c287552009a4af4e943592d79a0f42efb44671aa.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:2900

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description maqjaoyj "wifi internet conection"
2⤵
- Launches sc.exe
PID:3496

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start maqjaoyj
2⤵
- Launches sc.exe
PID:3476

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:1496

C:\Windows\SysWOW64\maqjaoyj\gohxczrb.exe
C:\Windows\SysWOW64\maqjaoyj\gohxczrb.exe /d"C:\Users\Admin\AppData\Local\Temp\5ff6edb9d95818ca99a6d559c287552009a4af4e943592d79a0f42efb44671aa.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2348

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
PID:5040

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\gohxczrb.exe
Filesize
12.9MB

MD5
79b5a3780c0807d1eba2b58d9c994e96

SHA1
3a17993b1732d28d2cbec9034f35a776752dbe50

SHA256
e1e6857f7d5eca7214c4d7b3ff80b4a57bd91f062b77b51c49cb8709039a0b9b

SHA512
49ff51924f94a44ac4021522d1c57bf1007c86b434edb0b6c5830bd378c006c77598847213126d96084a4ab5ea9ec3a1dc9d4f4463ed14ed473b0bd8b0142b1d

Download Submit
C:\Windows\SysWOW64\maqjaoyj\gohxczrb.exe
Filesize
12.9MB

MD5
79b5a3780c0807d1eba2b58d9c994e96

SHA1
3a17993b1732d28d2cbec9034f35a776752dbe50

SHA256
e1e6857f7d5eca7214c4d7b3ff80b4a57bd91f062b77b51c49cb8709039a0b9b

SHA512
49ff51924f94a44ac4021522d1c57bf1007c86b434edb0b6c5830bd378c006c77598847213126d96084a4ab5ea9ec3a1dc9d4f4463ed14ed473b0bd8b0142b1d

Download Submit
memory/912-131-0x0000000000000000-mapping.dmp

Download
memory/1496-137-0x0000000000000000-mapping.dmp

Download
memory/2220-130-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/2348-139-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/2356-132-0x0000000000000000-mapping.dmp

Download
memory/2900-134-0x0000000000000000-mapping.dmp

Download
memory/3476-136-0x0000000000000000-mapping.dmp

Download
memory/3496-135-0x0000000000000000-mapping.dmp

Download
memory/5040-141-0x0000000000790000-0x00000000007A5000-memory.dmp

Filesize
84KB

Download
memory/5040-140-0x0000000000000000-mapping.dmp

Download
memory/5040-144-0x0000000000790000-0x00000000007A5000-memory.dmp

Filesize
84KB

Download
memory/5040-145-0x0000000000790000-0x00000000007A5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads