tofsee | 6a6941267ae0c7a98e3854814083c17dfe43da830acd256a74ac072d8a00a7e8

General

Target

5d2e671530ea99e8d6211a1c38fdbbbe.exe
Size

10.5MB
MD5

5d2e671530ea99e8d6211a1c38fdbbbe
SHA1

26e4576726810b824d299e6b36bf33cbdffa4643
SHA256

6a6941267ae0c7a98e3854814083c17dfe43da830acd256a74ac072d8a00a7e8
SHA512

3ea51bf4ff4ae6ab2aa965f8b4e67379efa8a6c6d7b0e7079deb05b9b526e77605a2d4208b0b9970ad58a247ef7419938f7a422aa163321602670c95cb2b4a54
SSDEEP

6144:A+rWO2zeSPDjMXMH7Ll4aFpWVqIwUAP97GEwHrG2+e1x2:A+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

3860 netsh.exe

pid	process
3860	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\trwaogmg\ImagePath = "C:\\Windows\\SysWOW64\\trwaogmg\\cfnnljnw.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:

5d2e671530ea99e8d6211a1c38fdbbbe.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2447855248-390457009-3660902674-1000\Control Panel\International\Geo\Nation	5d2e671530ea99e8d6211a1c38fdbbbe.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

4668 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

cfnnljnw.exe

pid process

3992 cfnnljnw.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

cfnnljnw.exe

description pid process target process

PID 3992 set thread context of 4668 3992 cfnnljnw.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

3476 sc.exe
4716 sc.exe
1064 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
4668	svchost.exe

pid	process
3992	cfnnljnw.exe

description	pid	process	target process
PID 3992 set thread context of 4668	3992	cfnnljnw.exe	svchost.exe

pid	process
3476	sc.exe
4716	sc.exe
1064	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 opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

5d2e671530ea99e8d6211a1c38fdbbbe.execfnnljnw.exe

description	pid	process	target process
PID 2884 wrote to memory of 2928	2884	5d2e671530ea99e8d6211a1c38fdbbbe.exe	cmd.exe
PID 2884 wrote to memory of 2928	2884	5d2e671530ea99e8d6211a1c38fdbbbe.exe	cmd.exe
PID 2884 wrote to memory of 2928	2884	5d2e671530ea99e8d6211a1c38fdbbbe.exe	cmd.exe
PID 2884 wrote to memory of 4044	2884	5d2e671530ea99e8d6211a1c38fdbbbe.exe	cmd.exe
PID 2884 wrote to memory of 4044	2884	5d2e671530ea99e8d6211a1c38fdbbbe.exe	cmd.exe
PID 2884 wrote to memory of 4044	2884	5d2e671530ea99e8d6211a1c38fdbbbe.exe	cmd.exe
PID 2884 wrote to memory of 3476	2884	5d2e671530ea99e8d6211a1c38fdbbbe.exe	sc.exe
PID 2884 wrote to memory of 3476	2884	5d2e671530ea99e8d6211a1c38fdbbbe.exe	sc.exe
PID 2884 wrote to memory of 3476	2884	5d2e671530ea99e8d6211a1c38fdbbbe.exe	sc.exe
PID 2884 wrote to memory of 4716	2884	5d2e671530ea99e8d6211a1c38fdbbbe.exe	sc.exe
PID 2884 wrote to memory of 4716	2884	5d2e671530ea99e8d6211a1c38fdbbbe.exe	sc.exe
PID 2884 wrote to memory of 4716	2884	5d2e671530ea99e8d6211a1c38fdbbbe.exe	sc.exe
PID 2884 wrote to memory of 1064	2884	5d2e671530ea99e8d6211a1c38fdbbbe.exe	sc.exe
PID 2884 wrote to memory of 1064	2884	5d2e671530ea99e8d6211a1c38fdbbbe.exe	sc.exe
PID 2884 wrote to memory of 1064	2884	5d2e671530ea99e8d6211a1c38fdbbbe.exe	sc.exe
PID 2884 wrote to memory of 3860	2884	5d2e671530ea99e8d6211a1c38fdbbbe.exe	netsh.exe
PID 2884 wrote to memory of 3860	2884	5d2e671530ea99e8d6211a1c38fdbbbe.exe	netsh.exe
PID 2884 wrote to memory of 3860	2884	5d2e671530ea99e8d6211a1c38fdbbbe.exe	netsh.exe
PID 3992 wrote to memory of 4668	3992	cfnnljnw.exe	svchost.exe
PID 3992 wrote to memory of 4668	3992	cfnnljnw.exe	svchost.exe
PID 3992 wrote to memory of 4668	3992	cfnnljnw.exe	svchost.exe
PID 3992 wrote to memory of 4668	3992	cfnnljnw.exe	svchost.exe
PID 3992 wrote to memory of 4668	3992	cfnnljnw.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\5d2e671530ea99e8d6211a1c38fdbbbe.exe
"C:\Users\Admin\AppData\Local\Temp\5d2e671530ea99e8d6211a1c38fdbbbe.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2884

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\trwaogmg\
2⤵
PID:2928

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\cfnnljnw.exe" C:\Windows\SysWOW64\trwaogmg\
2⤵
PID:4044

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create trwaogmg binPath= "C:\Windows\SysWOW64\trwaogmg\cfnnljnw.exe /d\"C:\Users\Admin\AppData\Local\Temp\5d2e671530ea99e8d6211a1c38fdbbbe.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:3476

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description trwaogmg "wifi internet conection"
2⤵
- Launches sc.exe
PID:4716

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start trwaogmg
2⤵
- Launches sc.exe
PID:1064

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:3860

C:\Windows\SysWOW64\trwaogmg\cfnnljnw.exe
C:\Windows\SysWOW64\trwaogmg\cfnnljnw.exe /d"C:\Users\Admin\AppData\Local\Temp\5d2e671530ea99e8d6211a1c38fdbbbe.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3992

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
- Deletes itself
PID:4668

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\cfnnljnw.exe
Filesize
12.9MB

MD5
9a4f9526e16fa85338c54f4077e93932

SHA1
817787aaae95266e9ff5cfa0c467f4819fd29f17

SHA256
111aa8bc20db028a8073bb22f551836fb608a5791a5f435699a5a92c2df3e38a

SHA512
404d914f0e0506d0ced66a11a5e725ca420ab50cb0b1c91b9d9e96a2910f59dedecea8ea55dede604229c02d6f042068d2949b8ff6869bf8375a7e77e80468bb

Download Submit
memory/2884-1-0x00000000005B0000-0x00000000006B0000-memory.dmp

Filesize
1024KB

Download
memory/2884-2-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2884-7-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2884-6-0x0000000000400000-0x000000000051A000-memory.dmp

Filesize
1.1MB

Download
memory/3992-9-0x0000000000400000-0x000000000051A000-memory.dmp

Filesize
1.1MB

Download
memory/3992-10-0x0000000000400000-0x000000000051A000-memory.dmp

Filesize
1.1MB

Download
memory/3992-14-0x0000000000400000-0x000000000051A000-memory.dmp

Filesize
1.1MB

Download
memory/4668-11-0x0000000000B10000-0x0000000000B25000-memory.dmp

Filesize
84KB

Download
memory/4668-15-0x0000000000B10000-0x0000000000B25000-memory.dmp

Filesize
84KB

Download
memory/4668-16-0x0000000000B10000-0x0000000000B25000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads