tofsee | bb07448d9a17097cf6476c0adc3b3443d942b30049de82590351b66fccacb4ca

General

Target

c2b875ec37a9272c9f6913e5e51c8c2f.exe
Size

13.8MB
MD5

c2b875ec37a9272c9f6913e5e51c8c2f
SHA1

25f1fcfd9bf08b879bb1fd13a42578e72cc3ad98
SHA256

bb07448d9a17097cf6476c0adc3b3443d942b30049de82590351b66fccacb4ca
SHA512

6c285a552db5de631f5e293292c4bcd426fb982579113c4817c84d9d9a72702cf7038d62b3c3ec1814c6bb1ef0a99f5603dd92e31d5ed89f0f163855e0759350
SSDEEP

6144:x+rWO2zeSPDjMXMH7Ll4aFpWVqIwUAP97GEwHrG2+e1x2:x+r1IeSXMXc7LlxWV4Ug97GZ+ej

Score

10^/10

tofsee evasion execution persistence privilege_escalation 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) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002
Modifies Windows Firewall 2 TTPs 1 IoCs
evasion

Windows Service
T1543.003

Disable or Modify System Firewall
T1562.004

Processes:

netsh.exe

pid process

3308 netsh.exe

pid	process
3308	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\kqadyljg\ImagePath = "C:\\Windows\\SysWOW64\\kqadyljg\\okekqskb.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:

c2b875ec37a9272c9f6913e5e51c8c2f.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4204450073-1267028356-951339405-1000\Control Panel\International\Geo\Nation	c2b875ec37a9272c9f6913e5e51c8c2f.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

2928 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

okekqskb.exe

pid process

1452 okekqskb.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

okekqskb.exe

description pid process target process

PID 1452 set thread context of 2928 1452 okekqskb.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

2804 sc.exe
2872 sc.exe
3680 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2928	svchost.exe

pid	process
1452	okekqskb.exe

description	pid	process	target process
PID 1452 set thread context of 2928	1452	okekqskb.exe	svchost.exe

pid	process
2804	sc.exe
2872	sc.exe
3680	sc.exe

Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

persistence privilege_escalation

Netsh Helper DLL

T1546.007

Processes:

netsh.exe

description	ioc	process
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

c2b875ec37a9272c9f6913e5e51c8c2f.exeokekqskb.exe

description	pid	process	target process
PID 3928 wrote to memory of 2008	3928	c2b875ec37a9272c9f6913e5e51c8c2f.exe	cmd.exe
PID 3928 wrote to memory of 2008	3928	c2b875ec37a9272c9f6913e5e51c8c2f.exe	cmd.exe
PID 3928 wrote to memory of 2008	3928	c2b875ec37a9272c9f6913e5e51c8c2f.exe	cmd.exe
PID 3928 wrote to memory of 5048	3928	c2b875ec37a9272c9f6913e5e51c8c2f.exe	cmd.exe
PID 3928 wrote to memory of 5048	3928	c2b875ec37a9272c9f6913e5e51c8c2f.exe	cmd.exe
PID 3928 wrote to memory of 5048	3928	c2b875ec37a9272c9f6913e5e51c8c2f.exe	cmd.exe
PID 3928 wrote to memory of 2804	3928	c2b875ec37a9272c9f6913e5e51c8c2f.exe	sc.exe
PID 3928 wrote to memory of 2804	3928	c2b875ec37a9272c9f6913e5e51c8c2f.exe	sc.exe
PID 3928 wrote to memory of 2804	3928	c2b875ec37a9272c9f6913e5e51c8c2f.exe	sc.exe
PID 3928 wrote to memory of 2872	3928	c2b875ec37a9272c9f6913e5e51c8c2f.exe	sc.exe
PID 3928 wrote to memory of 2872	3928	c2b875ec37a9272c9f6913e5e51c8c2f.exe	sc.exe
PID 3928 wrote to memory of 2872	3928	c2b875ec37a9272c9f6913e5e51c8c2f.exe	sc.exe
PID 3928 wrote to memory of 3680	3928	c2b875ec37a9272c9f6913e5e51c8c2f.exe	sc.exe
PID 3928 wrote to memory of 3680	3928	c2b875ec37a9272c9f6913e5e51c8c2f.exe	sc.exe
PID 3928 wrote to memory of 3680	3928	c2b875ec37a9272c9f6913e5e51c8c2f.exe	sc.exe
PID 3928 wrote to memory of 3308	3928	c2b875ec37a9272c9f6913e5e51c8c2f.exe	netsh.exe
PID 3928 wrote to memory of 3308	3928	c2b875ec37a9272c9f6913e5e51c8c2f.exe	netsh.exe
PID 3928 wrote to memory of 3308	3928	c2b875ec37a9272c9f6913e5e51c8c2f.exe	netsh.exe
PID 1452 wrote to memory of 2928	1452	okekqskb.exe	svchost.exe
PID 1452 wrote to memory of 2928	1452	okekqskb.exe	svchost.exe
PID 1452 wrote to memory of 2928	1452	okekqskb.exe	svchost.exe
PID 1452 wrote to memory of 2928	1452	okekqskb.exe	svchost.exe
PID 1452 wrote to memory of 2928	1452	okekqskb.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\c2b875ec37a9272c9f6913e5e51c8c2f.exe
"C:\Users\Admin\AppData\Local\Temp\c2b875ec37a9272c9f6913e5e51c8c2f.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3928

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kqadyljg\
2⤵
PID:2008

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\okekqskb.exe" C:\Windows\SysWOW64\kqadyljg\
2⤵
PID:5048

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create kqadyljg binPath= "C:\Windows\SysWOW64\kqadyljg\okekqskb.exe /d\"C:\Users\Admin\AppData\Local\Temp\c2b875ec37a9272c9f6913e5e51c8c2f.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:2804

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description kqadyljg "wifi internet conection"
2⤵
- Launches sc.exe
PID:2872

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start kqadyljg
2⤵
- Launches sc.exe
PID:3680

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
- Event Triggered Execution: Netsh Helper DLL
PID:3308

C:\Windows\SysWOW64\kqadyljg\okekqskb.exe
C:\Windows\SysWOW64\kqadyljg\okekqskb.exe /d"C:\Users\Admin\AppData\Local\Temp\c2b875ec37a9272c9f6913e5e51c8c2f.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1452

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
- Deletes itself
PID:2928

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

1

T1569

Service Execution

1

T1569.002

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Defense Evasion

Impair Defenses

1

T1562

Disable or Modify System Firewall

Modify Registry

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\okekqskb.exe
Filesize
12.2MB

MD5
bc6a93eb22c2af8345d2ffaba30fa4c5

SHA1
ba2361d66075af7a3e28488a9f65d0e4cb54dade

SHA256
b7d25bd98379aed9d2168dac12c2bcc3a87e1baaddc961347ea043a822f65214

SHA512
650926518d48ad67e0c7986c961446b471d377630e755114056d4c5c68649d4e3cbc0f2902895a0e37bc205f9c76ba3f80a9e654218571a53d9127db5019d5e6

Download Submit
memory/1452-9-0x0000000000400000-0x000000000051A000-memory.dmp

Filesize
1.1MB

Download
memory/1452-11-0x0000000000400000-0x000000000051A000-memory.dmp

Filesize
1.1MB

Download
memory/1452-14-0x0000000000400000-0x000000000051A000-memory.dmp

Filesize
1.1MB

Download
memory/2928-15-0x0000000000BE0000-0x0000000000BF5000-memory.dmp

Filesize
84KB

Download
memory/2928-10-0x0000000000BE0000-0x0000000000BF5000-memory.dmp

Filesize
84KB

Download
memory/2928-16-0x0000000000BE0000-0x0000000000BF5000-memory.dmp

Filesize
84KB

Download
memory/3928-1-0x0000000000780000-0x0000000000880000-memory.dmp

Filesize
1024KB

Download
memory/3928-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3928-7-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3928-6-0x0000000000400000-0x000000000051A000-memory.dmp

Filesize
1.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads