tofsee | 66f18394a4a52c67b3d4eb5a1a5cdfac8c1771bbc1b8442da0115d0cc1b6461b

General

Target

JaffaCakes118_f551f7f59207e7f04a535f18c0780be5.exe
Size

13.7MB
MD5

f551f7f59207e7f04a535f18c0780be5
SHA1

c88f1736924a055f2a54d904833a7c1b0d63689e
SHA256

66f18394a4a52c67b3d4eb5a1a5cdfac8c1771bbc1b8442da0115d0cc1b6461b
SHA512

57ea789d50e2c0fc32c83d625371ae5ae0721e4eae0839c2a529467e58e46835ad0032d2cc6ec30214b1110efa5cfb8226d7ea62202bdb75071dffadf9b23310
SSDEEP

49152://m3Ueeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee+:/

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
2928	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\wsxiwoil\ImagePath = "C:\\Windows\\SysWOW64\\wsxiwoil\\tclthzhq.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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	JaffaCakes118_f551f7f59207e7f04a535f18c0780be5.exe

Deletes itself 1 IoCs

pid	Process
764	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3376	tclthzhq.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3376 set thread context of 764	3376	tclthzhq.exe	100

Launches sc.exe 3 IoCs

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

pid	Process
3080	sc.exe
4132	sc.exe
1020	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
3712	704	WerFault.exe	82
4276	3376	WerFault.exe	93

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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_f551f7f59207e7f04a535f18c0780be5.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	tclthzhq.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

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 704 wrote to memory of 5108	704	JaffaCakes118_f551f7f59207e7f04a535f18c0780be5.exe	83
PID 704 wrote to memory of 5108	704	JaffaCakes118_f551f7f59207e7f04a535f18c0780be5.exe	83
PID 704 wrote to memory of 5108	704	JaffaCakes118_f551f7f59207e7f04a535f18c0780be5.exe	83
PID 704 wrote to memory of 1604	704	JaffaCakes118_f551f7f59207e7f04a535f18c0780be5.exe	85
PID 704 wrote to memory of 1604	704	JaffaCakes118_f551f7f59207e7f04a535f18c0780be5.exe	85
PID 704 wrote to memory of 1604	704	JaffaCakes118_f551f7f59207e7f04a535f18c0780be5.exe	85
PID 704 wrote to memory of 3080	704	JaffaCakes118_f551f7f59207e7f04a535f18c0780be5.exe	87
PID 704 wrote to memory of 3080	704	JaffaCakes118_f551f7f59207e7f04a535f18c0780be5.exe	87
PID 704 wrote to memory of 3080	704	JaffaCakes118_f551f7f59207e7f04a535f18c0780be5.exe	87
PID 704 wrote to memory of 4132	704	JaffaCakes118_f551f7f59207e7f04a535f18c0780be5.exe	89
PID 704 wrote to memory of 4132	704	JaffaCakes118_f551f7f59207e7f04a535f18c0780be5.exe	89
PID 704 wrote to memory of 4132	704	JaffaCakes118_f551f7f59207e7f04a535f18c0780be5.exe	89
PID 704 wrote to memory of 1020	704	JaffaCakes118_f551f7f59207e7f04a535f18c0780be5.exe	91
PID 704 wrote to memory of 1020	704	JaffaCakes118_f551f7f59207e7f04a535f18c0780be5.exe	91
PID 704 wrote to memory of 1020	704	JaffaCakes118_f551f7f59207e7f04a535f18c0780be5.exe	91
PID 704 wrote to memory of 2928	704	JaffaCakes118_f551f7f59207e7f04a535f18c0780be5.exe	94
PID 704 wrote to memory of 2928	704	JaffaCakes118_f551f7f59207e7f04a535f18c0780be5.exe	94
PID 704 wrote to memory of 2928	704	JaffaCakes118_f551f7f59207e7f04a535f18c0780be5.exe	94
PID 3376 wrote to memory of 764	3376	tclthzhq.exe	100
PID 3376 wrote to memory of 764	3376	tclthzhq.exe	100
PID 3376 wrote to memory of 764	3376	tclthzhq.exe	100
PID 3376 wrote to memory of 764	3376	tclthzhq.exe	100
PID 3376 wrote to memory of 764	3376	tclthzhq.exe	100

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_f551f7f59207e7f04a535f18c0780be5.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_f551f7f59207e7f04a535f18c0780be5.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:704
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wsxiwoil\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:5108
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\tclthzhq.exe" C:\Windows\SysWOW64\wsxiwoil\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1604
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create wsxiwoil binPath= "C:\Windows\SysWOW64\wsxiwoil\tclthzhq.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_f551f7f59207e7f04a535f18c0780be5.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3080
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description wsxiwoil "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4132
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start wsxiwoil
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1020
- 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:2928
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 704 -s 1036
  2⤵
  - Program crash
  PID:3712

C:\Windows\SysWOW64\wsxiwoil\tclthzhq.exe
C:\Windows\SysWOW64\wsxiwoil\tclthzhq.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_f551f7f59207e7f04a535f18c0780be5.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3376
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:764
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3376 -s 524
  2⤵
  - Program crash
  PID:4276

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 704 -ip 704
1⤵
PID:1296

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 3376 -ip 3376
1⤵
PID:5060

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

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
13.4MB

MD5
103b7fa5faccea68f9674f16b32c060e

SHA1
523a36ce19592aa31ea3ee56350bb7cc4fd442e0

SHA256
c44a09c07dbea7f9e646d7a716e3f13adf26a3c7a7cc089364732305442894ba

SHA512
03ddb99cca761b2fb7545fc8a977be82ac6b0e47c443bc2273460c05fe627a9ceb16027a74eaa842ead2e4fd1e9ff6d5d6a9b5d885fc4aa2b7bddbc57028cf0a

Download Submit
memory/704-1-0x00000000016E0000-0x00000000017E0000-memory.dmp

Filesize
1024KB

Download
memory/704-2-0x0000000003400000-0x0000000003413000-memory.dmp

Filesize
76KB

Download
memory/704-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/704-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/704-9-0x0000000003400000-0x0000000003413000-memory.dmp

Filesize
76KB

Download
memory/704-8-0x0000000000400000-0x00000000016BC000-memory.dmp

Filesize
18.7MB

Download
memory/764-11-0x0000000000930000-0x0000000000945000-memory.dmp

Filesize
84KB

Download
memory/764-13-0x0000000000930000-0x0000000000945000-memory.dmp

Filesize
84KB

Download
memory/764-15-0x0000000000930000-0x0000000000945000-memory.dmp

Filesize
84KB

Download
memory/3376-14-0x0000000000400000-0x00000000016BC000-memory.dmp

Filesize
18.7MB

Download
memory/3376-17-0x0000000000400000-0x00000000016BC000-memory.dmp

Filesize
18.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads