tofsee | d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416

General

Target

d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe
Size

12.8MB
MD5

92be29ef290920a9981893a1b0c28551
SHA1

8268a90e5c8860c467fcdac69e9765bac0b61782
SHA256

d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416
SHA512

f442b05da104a0f01dea2b6da54d2bf8da3b2c5f6c7087a22b026493ac9aeb2fbb62a1dfb545abc95fc0717452bd8b8d62e4742796394c50005380a9f5318e51
SSDEEP

6144:kNvMXNc7x72uNJFeTgkYIvpjkHp2e7z+/uyAmMGwDkqyyyyyyyyyyyyyyyyyyyyj:kNvM9i7fNJFeTgk9BjkHp2Euu1mrk

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

quadoil.ru

lakeflex.ru

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Tofsee family
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

pid	Process
2768	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\wysfxwvm\ImagePath = "C:\\Windows\\SysWOW64\\wysfxwvm\\glkiyenc.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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe

Deletes itself 1 IoCs

pid	Process
2296	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4148	glkiyenc.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4148 set thread context of 2296	4148	glkiyenc.exe	102

Launches sc.exe 3 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
4556	sc.exe
2232	sc.exe
1196	sc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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

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

Program crash 2 IoCs

pid	pid_target	Process	procid_target
4024	3588	WerFault.exe	81
2496	4148	WerFault.exe	94

System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	glkiyenc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3588 wrote to memory of 3136	3588	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	82
PID 3588 wrote to memory of 3136	3588	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	82
PID 3588 wrote to memory of 3136	3588	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	82
PID 3588 wrote to memory of 3640	3588	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	84
PID 3588 wrote to memory of 3640	3588	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	84
PID 3588 wrote to memory of 3640	3588	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	84
PID 3588 wrote to memory of 4556	3588	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	86
PID 3588 wrote to memory of 4556	3588	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	86
PID 3588 wrote to memory of 4556	3588	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	86
PID 3588 wrote to memory of 2232	3588	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	88
PID 3588 wrote to memory of 2232	3588	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	88
PID 3588 wrote to memory of 2232	3588	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	88
PID 3588 wrote to memory of 1196	3588	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	92
PID 3588 wrote to memory of 1196	3588	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	92
PID 3588 wrote to memory of 1196	3588	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	92
PID 3588 wrote to memory of 2768	3588	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	95
PID 3588 wrote to memory of 2768	3588	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	95
PID 3588 wrote to memory of 2768	3588	d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe	95
PID 4148 wrote to memory of 2296	4148	glkiyenc.exe	102
PID 4148 wrote to memory of 2296	4148	glkiyenc.exe	102
PID 4148 wrote to memory of 2296	4148	glkiyenc.exe	102
PID 4148 wrote to memory of 2296	4148	glkiyenc.exe	102
PID 4148 wrote to memory of 2296	4148	glkiyenc.exe	102

C:\Users\Admin\AppData\Local\Temp\d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe
"C:\Users\Admin\AppData\Local\Temp\d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3588
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wysfxwvm\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3136
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\glkiyenc.exe" C:\Windows\SysWOW64\wysfxwvm\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3640
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create wysfxwvm binPath= "C:\Windows\SysWOW64\wysfxwvm\glkiyenc.exe /d\"C:\Users\Admin\AppData\Local\Temp\d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4556
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description wysfxwvm "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2232
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start wysfxwvm
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1196
- 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
  - System Location Discovery: System Language Discovery
  PID:2768
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3588 -s 1200
  2⤵
  - Program crash
  PID:4024

C:\Windows\SysWOW64\wysfxwvm\glkiyenc.exe
C:\Windows\SysWOW64\wysfxwvm\glkiyenc.exe /d"C:\Users\Admin\AppData\Local\Temp\d92e9ff83aa1bea9d8934580419e139de0eb37cb6eb9c90b804f70b9b501d416.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4148
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2296
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4148 -s 532
  2⤵
  - Program crash
  PID:2496

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3588 -ip 3588
1⤵
PID:1900

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4148 -ip 4148
1⤵
PID:2480

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

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\glkiyenc.exe

Filesize
10.0MB

MD5
64c03eb95d1eeda5641287bf6874a678

SHA1
aedf8c8634c3654513e93efa97b0e0e48f04d692

SHA256
51ce5b05f552089dee7cf00ff49d3e0920797e5bf7fb44cdb7d01173eb139268

SHA512
5fdad889b699897c492284c18b1e4ce745396618a315bf21cb67d04dcaef0c5c70f875e00d09b6d7375efd6d821070bb40bf01e1f4ac7557a7fce96fdfce7b19

Download Submit
memory/2296-11-0x0000000000A70000-0x0000000000A85000-memory.dmp

Filesize
84KB

Download
memory/2296-13-0x0000000000A70000-0x0000000000A85000-memory.dmp

Filesize
84KB

Download
memory/2296-15-0x0000000000A70000-0x0000000000A85000-memory.dmp

Filesize
84KB

Download
memory/3588-2-0x0000000000A30000-0x0000000000A43000-memory.dmp

Filesize
76KB

Download
memory/3588-1-0x0000000000AA0000-0x0000000000BA0000-memory.dmp

Filesize
1024KB

Download
memory/3588-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3588-8-0x0000000000400000-0x0000000000784000-memory.dmp

Filesize
3.5MB

Download
memory/3588-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3588-9-0x0000000000A30000-0x0000000000A43000-memory.dmp

Filesize
76KB

Download
memory/4148-14-0x0000000000400000-0x0000000000784000-memory.dmp

Filesize
3.5MB

Download
memory/4148-16-0x0000000000400000-0x0000000000784000-memory.dmp

Filesize
3.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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