tofsee | bc51cad0a8ed5eb57551f034a5f693b4d1c135201a38ff4b3d7c1eb6151745c2

General

Target

JaffaCakes118_f5a99263467440a04da884e37b581577.exe
Size

14.2MB
MD5

f5a99263467440a04da884e37b581577
SHA1

58c016d9dae50898c03dc602997db96b14fbc2fe
SHA256

bc51cad0a8ed5eb57551f034a5f693b4d1c135201a38ff4b3d7c1eb6151745c2
SHA512

b5255af60ca12756011398e5907ef6587cd9ea77401b55b30c0812c2c616ab492eff9d2bba6c5a7ba7732e2f4f0eba80d702bb0d98e767499d182219e16f45af
SSDEEP

196608:H4TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTH:H

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

defeatwax.ru

refabyd.info

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
456	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\yhlucjwl\ImagePath = "C:\\Windows\\SysWOW64\\yhlucjwl\\fzisfinz.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	JaffaCakes118_f5a99263467440a04da884e37b581577.exe

Deletes itself 1 IoCs

pid	Process
2072	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2800	fzisfinz.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2800 set thread context of 2072	2800	fzisfinz.exe	103

Launches sc.exe 3 IoCs

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

pid	Process
832	sc.exe
4856	sc.exe
5108	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
2444	1220	WerFault.exe	84
4296	2800	WerFault.exe	96

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	JaffaCakes118_f5a99263467440a04da884e37b581577.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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fzisfinz.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	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1220 wrote to memory of 2144	1220	JaffaCakes118_f5a99263467440a04da884e37b581577.exe	85
PID 1220 wrote to memory of 2144	1220	JaffaCakes118_f5a99263467440a04da884e37b581577.exe	85
PID 1220 wrote to memory of 2144	1220	JaffaCakes118_f5a99263467440a04da884e37b581577.exe	85
PID 1220 wrote to memory of 1632	1220	JaffaCakes118_f5a99263467440a04da884e37b581577.exe	87
PID 1220 wrote to memory of 1632	1220	JaffaCakes118_f5a99263467440a04da884e37b581577.exe	87
PID 1220 wrote to memory of 1632	1220	JaffaCakes118_f5a99263467440a04da884e37b581577.exe	87
PID 1220 wrote to memory of 832	1220	JaffaCakes118_f5a99263467440a04da884e37b581577.exe	89
PID 1220 wrote to memory of 832	1220	JaffaCakes118_f5a99263467440a04da884e37b581577.exe	89
PID 1220 wrote to memory of 832	1220	JaffaCakes118_f5a99263467440a04da884e37b581577.exe	89
PID 1220 wrote to memory of 4856	1220	JaffaCakes118_f5a99263467440a04da884e37b581577.exe	92
PID 1220 wrote to memory of 4856	1220	JaffaCakes118_f5a99263467440a04da884e37b581577.exe	92
PID 1220 wrote to memory of 4856	1220	JaffaCakes118_f5a99263467440a04da884e37b581577.exe	92
PID 1220 wrote to memory of 5108	1220	JaffaCakes118_f5a99263467440a04da884e37b581577.exe	94
PID 1220 wrote to memory of 5108	1220	JaffaCakes118_f5a99263467440a04da884e37b581577.exe	94
PID 1220 wrote to memory of 5108	1220	JaffaCakes118_f5a99263467440a04da884e37b581577.exe	94
PID 1220 wrote to memory of 456	1220	JaffaCakes118_f5a99263467440a04da884e37b581577.exe	97
PID 1220 wrote to memory of 456	1220	JaffaCakes118_f5a99263467440a04da884e37b581577.exe	97
PID 1220 wrote to memory of 456	1220	JaffaCakes118_f5a99263467440a04da884e37b581577.exe	97
PID 2800 wrote to memory of 2072	2800	fzisfinz.exe	103
PID 2800 wrote to memory of 2072	2800	fzisfinz.exe	103
PID 2800 wrote to memory of 2072	2800	fzisfinz.exe	103
PID 2800 wrote to memory of 2072	2800	fzisfinz.exe	103
PID 2800 wrote to memory of 2072	2800	fzisfinz.exe	103

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_f5a99263467440a04da884e37b581577.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_f5a99263467440a04da884e37b581577.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1220
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\yhlucjwl\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2144
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\fzisfinz.exe" C:\Windows\SysWOW64\yhlucjwl\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1632
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create yhlucjwl binPath= "C:\Windows\SysWOW64\yhlucjwl\fzisfinz.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_f5a99263467440a04da884e37b581577.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:832
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description yhlucjwl "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4856
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start yhlucjwl
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:5108
- 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:456
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1220 -s 1036
  2⤵
  - Program crash
  PID:2444

C:\Windows\SysWOW64\yhlucjwl\fzisfinz.exe
C:\Windows\SysWOW64\yhlucjwl\fzisfinz.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_f5a99263467440a04da884e37b581577.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2800
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2072
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2800 -s 512
  2⤵
  - Program crash
  PID:4296

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 1220 -ip 1220
1⤵
PID:60

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 484 -p 2800 -ip 2800
1⤵
PID:2664

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\fzisfinz.exe

Filesize
11.9MB

MD5
1276ea324582b26d0ec899a98be829ef

SHA1
fff5f7f929677e58a34313122b24836015669ec2

SHA256
edbf31729546082277d558d35aa30e6f74829c816174eb1ec66d8761016b5884

SHA512
e893abc4adcae40db3753c13d614b6d1a6f1aa6c36a7ea0346ffa5f21566a98787bbb0e4d42f9bd083343f36c57023cf510a78303dbee460184a95904274667b

Download Submit
memory/1220-8-0x0000000000400000-0x0000000000870000-memory.dmp

Filesize
4.4MB

Download
memory/1220-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1220-1-0x0000000000B50000-0x0000000000C50000-memory.dmp

Filesize
1024KB

Download
memory/1220-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1220-9-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/1220-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/2072-14-0x00000000003B0000-0x00000000003C5000-memory.dmp

Filesize
84KB

Download
memory/2072-12-0x00000000003B0000-0x00000000003C5000-memory.dmp

Filesize
84KB

Download
memory/2072-17-0x00000000003B0000-0x00000000003C5000-memory.dmp

Filesize
84KB

Download
memory/2800-11-0x0000000000400000-0x0000000000870000-memory.dmp

Filesize
4.4MB

Download
memory/2800-15-0x0000000000400000-0x0000000000870000-memory.dmp

Filesize
4.4MB

Download
memory/2800-16-0x0000000000400000-0x0000000000870000-memory.dmp

Filesize
4.4MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads