tofsee | 3524db898f877769c05f7ddf2d8ce8aaeab657f72101c37cf1cb6e1dae27db60

General

Target

JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe
Size

11.7MB
MD5

33e82123f4c295fa0a745a2e8a7494bf
SHA1

98a77e79583752b4525e3db66c8c72ef1b3e6727
SHA256

3524db898f877769c05f7ddf2d8ce8aaeab657f72101c37cf1cb6e1dae27db60
SHA512

877296d2ea7720b52faec155e7cb850d0d59315bb7b274b6eb2e1c558bdb4d0eb9467110b58e0773ed248a19ee385c8fe18cf16bf3ed257f3260818592e70542
SSDEEP

6144:qpZQURQYSIyx87mtw370yh8hcihvqFAjUF:oZ6Iyx87R0ymGihiOjU

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
5020	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\vkopncyr\ImagePath = "C:\\Windows\\SysWOW64\\vkopncyr\\krusttjx.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-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe

Deletes itself 1 IoCs

pid	Process
1084	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3520	krusttjx.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3520 set thread context of 1084	3520	krusttjx.exe	101

Launches sc.exe 3 IoCs

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

pid	Process
4108	sc.exe
3204	sc.exe
1600	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 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

Program crash 2 IoCs

pid	pid_target	Process	procid_target
1492	4944	WerFault.exe	82
3484	3520	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	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	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.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	krusttjx.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4944 wrote to memory of 1916	4944	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	83
PID 4944 wrote to memory of 1916	4944	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	83
PID 4944 wrote to memory of 1916	4944	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	83
PID 4944 wrote to memory of 4040	4944	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	85
PID 4944 wrote to memory of 4040	4944	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	85
PID 4944 wrote to memory of 4040	4944	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	85
PID 4944 wrote to memory of 1600	4944	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	87
PID 4944 wrote to memory of 1600	4944	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	87
PID 4944 wrote to memory of 1600	4944	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	87
PID 4944 wrote to memory of 4108	4944	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	90
PID 4944 wrote to memory of 4108	4944	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	90
PID 4944 wrote to memory of 4108	4944	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	90
PID 4944 wrote to memory of 3204	4944	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	92
PID 4944 wrote to memory of 3204	4944	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	92
PID 4944 wrote to memory of 3204	4944	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	92
PID 4944 wrote to memory of 5020	4944	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	95
PID 4944 wrote to memory of 5020	4944	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	95
PID 4944 wrote to memory of 5020	4944	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	95
PID 3520 wrote to memory of 1084	3520	krusttjx.exe	101
PID 3520 wrote to memory of 1084	3520	krusttjx.exe	101
PID 3520 wrote to memory of 1084	3520	krusttjx.exe	101
PID 3520 wrote to memory of 1084	3520	krusttjx.exe	101
PID 3520 wrote to memory of 1084	3520	krusttjx.exe	101

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4944
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vkopncyr\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1916
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\krusttjx.exe" C:\Windows\SysWOW64\vkopncyr\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4040
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create vkopncyr binPath= "C:\Windows\SysWOW64\vkopncyr\krusttjx.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1600
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description vkopncyr "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4108
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start vkopncyr
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3204
- 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:5020
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4944 -s 876
  2⤵
  - Program crash
  PID:1492

C:\Windows\SysWOW64\vkopncyr\krusttjx.exe
C:\Windows\SysWOW64\vkopncyr\krusttjx.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3520
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1084
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3520 -s 528
  2⤵
  - Program crash
  PID:3484

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 4944 -ip 4944
1⤵
PID:4952

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 3520 -ip 3520
1⤵
PID:3296

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\krusttjx.exe

Filesize
11.8MB

MD5
9f978351453261aad1d3c8e69faef756

SHA1
a891a79e7269f77cdfa3058392f257df41dbb961

SHA256
737ff69fefcb23c1067fba3417bfb74d6e7c0ce56e739f3b28a0abecf1f636a1

SHA512
fda4652e1e661efdf4abcdb5f12d4968d8b9b86783fd9394d9f6f5384398bac0c301cc63141ca8395ddf60185c508dae5b4b6ea1b8e1b565c6cdfc94f9368936

Download Submit
memory/1084-16-0x00000000005E0000-0x00000000005F5000-memory.dmp

Filesize
84KB

Download
memory/1084-19-0x00000000005E0000-0x00000000005F5000-memory.dmp

Filesize
84KB

Download
memory/1084-14-0x00000000005E0000-0x00000000005F5000-memory.dmp

Filesize
84KB

Download
memory/3520-11-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/3520-13-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/3520-12-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/3520-18-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/4944-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4944-8-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/4944-1-0x00000000005B0000-0x00000000006B0000-memory.dmp

Filesize
1024KB

Download
memory/4944-9-0x0000000000590000-0x00000000005A3000-memory.dmp

Filesize
76KB

Download
memory/4944-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4944-2-0x0000000000590000-0x00000000005A3000-memory.dmp

Filesize
76KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads