tofsee | 4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8

General

Target

4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe
Size

333KB
MD5

76a120236d4a3c44182016bd9a05417c
SHA1

c548777e9a3fb26597525edee630c79231357a5b
SHA256

4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8
SHA512

e773fa8ed3eeb3aae4ce818553f5f06a9f3c8f7e7b89135c10743bffb989b16862d0e29d855194203aef3a1fe19420308bddad92922b3b1bd1a6357e09ffe246
SSDEEP

6144:xOYmVlRyNQpj0ViCx2xKxc9Sh/KXl/wLWlWC8RzZap6j:xW7Rw2j0VmKqgJKXlwGeVZL

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
4464	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\kizdnnky\ImagePath = "C:\\Windows\\SysWOW64\\kizdnnky\\zsnzdsd.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-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe

Deletes itself 1 IoCs

pid	Process
3476	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2344	zsnzdsd.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2344 set thread context of 3476	2344	zsnzdsd.exe	94

Launches sc.exe 3 IoCs

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

pid	Process
536	sc.exe
1092	sc.exe
1396	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 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

Program crash 2 IoCs

pid	pid_target	Process	procid_target
4948	2344	WerFault.exe	93
724	1508	WerFault.exe	82

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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	zsnzdsd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1508 wrote to memory of 4120	1508	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	83
PID 1508 wrote to memory of 4120	1508	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	83
PID 1508 wrote to memory of 4120	1508	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	83
PID 1508 wrote to memory of 4996	1508	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	85
PID 1508 wrote to memory of 4996	1508	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	85
PID 1508 wrote to memory of 4996	1508	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	85
PID 1508 wrote to memory of 536	1508	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	87
PID 1508 wrote to memory of 536	1508	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	87
PID 1508 wrote to memory of 536	1508	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	87
PID 1508 wrote to memory of 1092	1508	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	89
PID 1508 wrote to memory of 1092	1508	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	89
PID 1508 wrote to memory of 1092	1508	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	89
PID 1508 wrote to memory of 1396	1508	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	91
PID 1508 wrote to memory of 1396	1508	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	91
PID 1508 wrote to memory of 1396	1508	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	91
PID 2344 wrote to memory of 3476	2344	zsnzdsd.exe	94
PID 2344 wrote to memory of 3476	2344	zsnzdsd.exe	94
PID 2344 wrote to memory of 3476	2344	zsnzdsd.exe	94
PID 2344 wrote to memory of 3476	2344	zsnzdsd.exe	94
PID 2344 wrote to memory of 3476	2344	zsnzdsd.exe	94
PID 1508 wrote to memory of 4464	1508	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	97
PID 1508 wrote to memory of 4464	1508	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	97
PID 1508 wrote to memory of 4464	1508	4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe	97

C:\Users\Admin\AppData\Local\Temp\4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe
"C:\Users\Admin\AppData\Local\Temp\4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1508
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kizdnnky\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4120
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zsnzdsd.exe" C:\Windows\SysWOW64\kizdnnky\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4996
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create kizdnnky binPath= "C:\Windows\SysWOW64\kizdnnky\zsnzdsd.exe /d\"C:\Users\Admin\AppData\Local\Temp\4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:536
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description kizdnnky "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1092
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start kizdnnky
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1396
- 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:4464
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1508 -s 664
  2⤵
  - Program crash
  PID:724

C:\Windows\SysWOW64\kizdnnky\zsnzdsd.exe
C:\Windows\SysWOW64\kizdnnky\zsnzdsd.exe /d"C:\Users\Admin\AppData\Local\Temp\4b2eae5f660d21810fb7d69e18c361751faa4bc3518d6803c64984cdd6cac5a8.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2344
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3476
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2344 -s 564
  2⤵
  - Program crash
  PID:4948

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 1508 -ip 1508
1⤵
PID:4392

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 2344 -ip 2344
1⤵
PID:4688

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\zsnzdsd.exe

Filesize
10.9MB

MD5
165d8b852ccfbeaf695c8c8898ea3826

SHA1
bab0b9ac1f5a981d5c1917fa09b70ca09467a2f3

SHA256
2e9e60c8cc9320842e59d89cff9eeb883fd1bd078a91b4b82d5834172880b0cd

SHA512
658c219cb9e1260c102f2929595dc955cb657f513b7a6b228f65dd99c9c903ef27a7789baf88bdcd1b269c913c0fa04be88a3b50bcfbdbd17ca328d0f817e74f

Download Submit
memory/1508-18-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1508-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1508-2-0x0000000000CE0000-0x0000000000CF3000-memory.dmp

Filesize
76KB

Download
memory/1508-17-0x0000000000CE0000-0x0000000000CF3000-memory.dmp

Filesize
76KB

Download
memory/1508-16-0x0000000000400000-0x0000000000882000-memory.dmp

Filesize
4.5MB

Download
memory/1508-1-0x0000000000890000-0x0000000000990000-memory.dmp

Filesize
1024KB

Download
memory/2344-15-0x0000000000400000-0x0000000000882000-memory.dmp

Filesize
4.5MB

Download
memory/2344-9-0x0000000000400000-0x0000000000882000-memory.dmp

Filesize
4.5MB

Download
memory/2344-8-0x0000000000400000-0x0000000000882000-memory.dmp

Filesize
4.5MB

Download
memory/3476-13-0x0000000000BD0000-0x0000000000BE5000-memory.dmp

Filesize
84KB

Download
memory/3476-10-0x0000000000BD0000-0x0000000000BE5000-memory.dmp

Filesize
84KB

Download
memory/3476-19-0x0000000000BD0000-0x0000000000BE5000-memory.dmp

Filesize
84KB

Download
memory/3476-20-0x0000000000BD0000-0x0000000000BE5000-memory.dmp

Filesize
84KB

Download
memory/3476-21-0x0000000000BD0000-0x0000000000BE5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads