tofsee | e000777678e885983bbbea7fc659bcf79c7c4ba38d548d3411a58347666dc92a

General

Target

59f4267dae33e83b59d952b7d5fe31bc.exe
Size

14.9MB
MD5

59f4267dae33e83b59d952b7d5fe31bc
SHA1

d1e6de12cc46bdb05943adde0c03b4b212685efb
SHA256

e000777678e885983bbbea7fc659bcf79c7c4ba38d548d3411a58347666dc92a
SHA512

927ffd0a7382a54b6561c5d2dc0b948e95498f56dfa194bec4c35f18c2af45e27ed496c884a0d3702537dc50c57fcd967cadda39464e7979e6fe7715f56ee14b
SSDEEP

6144:v+rWO2zeSPDjMXMH7Ll4aFpWVqIwUAP97GEwHrG2+e1x2:v+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

4692 netsh.exe

pid	process
4692	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\gknsikc\ImagePath = "C:\\Windows\\SysWOW64\\gknsikc\\tyllondi.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:

59f4267dae33e83b59d952b7d5fe31bc.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	59f4267dae33e83b59d952b7d5fe31bc.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

3008 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

tyllondi.exe

pid process

3884 tyllondi.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

tyllondi.exe

description pid process target process

PID 3884 set thread context of 3008 3884 tyllondi.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

1652 sc.exe
1528 sc.exe
4336 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
3008	svchost.exe

pid	process
3884	tyllondi.exe

description	pid	process	target process
PID 3884 set thread context of 3008	3884	tyllondi.exe	svchost.exe

pid	process
1652	sc.exe
1528	sc.exe
4336	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 queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

59f4267dae33e83b59d952b7d5fe31bc.exetyllondi.exe

description	pid	process	target process
PID 3004 wrote to memory of 5108	3004	59f4267dae33e83b59d952b7d5fe31bc.exe	cmd.exe
PID 3004 wrote to memory of 5108	3004	59f4267dae33e83b59d952b7d5fe31bc.exe	cmd.exe
PID 3004 wrote to memory of 5108	3004	59f4267dae33e83b59d952b7d5fe31bc.exe	cmd.exe
PID 3004 wrote to memory of 1072	3004	59f4267dae33e83b59d952b7d5fe31bc.exe	cmd.exe
PID 3004 wrote to memory of 1072	3004	59f4267dae33e83b59d952b7d5fe31bc.exe	cmd.exe
PID 3004 wrote to memory of 1072	3004	59f4267dae33e83b59d952b7d5fe31bc.exe	cmd.exe
PID 3004 wrote to memory of 4336	3004	59f4267dae33e83b59d952b7d5fe31bc.exe	sc.exe
PID 3004 wrote to memory of 4336	3004	59f4267dae33e83b59d952b7d5fe31bc.exe	sc.exe
PID 3004 wrote to memory of 4336	3004	59f4267dae33e83b59d952b7d5fe31bc.exe	sc.exe
PID 3004 wrote to memory of 1652	3004	59f4267dae33e83b59d952b7d5fe31bc.exe	sc.exe
PID 3004 wrote to memory of 1652	3004	59f4267dae33e83b59d952b7d5fe31bc.exe	sc.exe
PID 3004 wrote to memory of 1652	3004	59f4267dae33e83b59d952b7d5fe31bc.exe	sc.exe
PID 3004 wrote to memory of 1528	3004	59f4267dae33e83b59d952b7d5fe31bc.exe	sc.exe
PID 3004 wrote to memory of 1528	3004	59f4267dae33e83b59d952b7d5fe31bc.exe	sc.exe
PID 3004 wrote to memory of 1528	3004	59f4267dae33e83b59d952b7d5fe31bc.exe	sc.exe
PID 3004 wrote to memory of 4692	3004	59f4267dae33e83b59d952b7d5fe31bc.exe	netsh.exe
PID 3004 wrote to memory of 4692	3004	59f4267dae33e83b59d952b7d5fe31bc.exe	netsh.exe
PID 3004 wrote to memory of 4692	3004	59f4267dae33e83b59d952b7d5fe31bc.exe	netsh.exe
PID 3884 wrote to memory of 3008	3884	tyllondi.exe	svchost.exe
PID 3884 wrote to memory of 3008	3884	tyllondi.exe	svchost.exe
PID 3884 wrote to memory of 3008	3884	tyllondi.exe	svchost.exe
PID 3884 wrote to memory of 3008	3884	tyllondi.exe	svchost.exe
PID 3884 wrote to memory of 3008	3884	tyllondi.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\59f4267dae33e83b59d952b7d5fe31bc.exe
"C:\Users\Admin\AppData\Local\Temp\59f4267dae33e83b59d952b7d5fe31bc.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3004

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\gknsikc\
2⤵
PID:5108

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\tyllondi.exe" C:\Windows\SysWOW64\gknsikc\
2⤵
PID:1072

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create gknsikc binPath= "C:\Windows\SysWOW64\gknsikc\tyllondi.exe /d\"C:\Users\Admin\AppData\Local\Temp\59f4267dae33e83b59d952b7d5fe31bc.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:4336

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description gknsikc "wifi internet conection"
2⤵
- Launches sc.exe
PID:1652

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start gknsikc
2⤵
- Launches sc.exe
PID:1528

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:4692

C:\Windows\SysWOW64\gknsikc\tyllondi.exe
C:\Windows\SysWOW64\gknsikc\tyllondi.exe /d"C:\Users\Admin\AppData\Local\Temp\59f4267dae33e83b59d952b7d5fe31bc.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3884

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
- Deletes itself
PID:3008

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\tyllondi.exe

Filesize
13.8MB

MD5
2a9701121556eee98f6ba4ecaca9e938

SHA1
ef8810b0f64b6c623e773c38993ffcc0bf43ebb7

SHA256
cc5934a57c316800a61be10f4ad9eea46d0339bf5fbabd88f46a048cd846e106

SHA512
22195c5981e2d2f1d0e596c9f6173726297cabc86f2917a687cca92cbda163533a929ce059da8ebf77e5416c80a439aecbb6899096792032c3280f8fa89cb9a7

Download Submit
memory/3004-1-0x00000000006C0000-0x00000000007C0000-memory.dmp

Filesize
1024KB

Download
memory/3004-2-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3004-7-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3004-6-0x0000000000400000-0x000000000051A000-memory.dmp

Filesize
1.1MB

Download
memory/3008-10-0x00000000010E0000-0x00000000010F5000-memory.dmp

Filesize
84KB

Download
memory/3008-13-0x00000000010E0000-0x00000000010F5000-memory.dmp

Filesize
84KB

Download
memory/3008-16-0x00000000010E0000-0x00000000010F5000-memory.dmp

Filesize
84KB

Download
memory/3884-15-0x0000000000400000-0x000000000051A000-memory.dmp

Filesize
1.1MB

Download
memory/3884-11-0x0000000000400000-0x000000000051A000-memory.dmp

Filesize
1.1MB

Download
memory/3884-9-0x0000000000400000-0x000000000051A000-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