tofsee | 746beaa50c0b12ebe04c9e3cb94ce16af8eaef1faf42be65c6f75d3100f6f752

General

Target

JaffaCakes118_d0987197c55ff69af9b2a6f385be5ac4.exe
Size

12.7MB
MD5

d0987197c55ff69af9b2a6f385be5ac4
SHA1

1482d5d6a7f9557a6ad397e1e1bd52a693d0cf38
SHA256

746beaa50c0b12ebe04c9e3cb94ce16af8eaef1faf42be65c6f75d3100f6f752
SHA512

822348312e050b879c328dd5cd177db8eea35ded06566f59ec87c51bc3f59b9d702cd58e2b42917dc94695f8fb6937c55aaa44c4fba049a3115c5adbfcf2b109
SSDEEP

49152:j2mNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNH:C

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
3624	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\ysczspnx\ImagePath = "C:\\Windows\\SysWOW64\\ysczspnx\\nuxvwwma.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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	JaffaCakes118_d0987197c55ff69af9b2a6f385be5ac4.exe

Deletes itself 1 IoCs

pid	Process
812	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3500	nuxvwwma.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3500 set thread context of 812	3500	nuxvwwma.exe	98

Launches sc.exe 3 IoCs

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

pid	Process
3744	sc.exe
3108	sc.exe
1852	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
1336	3996	WerFault.exe	81
4084	3500	WerFault.exe	92

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	nuxvwwma.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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_d0987197c55ff69af9b2a6f385be5ac4.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3996 wrote to memory of 392	3996	JaffaCakes118_d0987197c55ff69af9b2a6f385be5ac4.exe	82
PID 3996 wrote to memory of 392	3996	JaffaCakes118_d0987197c55ff69af9b2a6f385be5ac4.exe	82
PID 3996 wrote to memory of 392	3996	JaffaCakes118_d0987197c55ff69af9b2a6f385be5ac4.exe	82
PID 3996 wrote to memory of 3256	3996	JaffaCakes118_d0987197c55ff69af9b2a6f385be5ac4.exe	84
PID 3996 wrote to memory of 3256	3996	JaffaCakes118_d0987197c55ff69af9b2a6f385be5ac4.exe	84
PID 3996 wrote to memory of 3256	3996	JaffaCakes118_d0987197c55ff69af9b2a6f385be5ac4.exe	84
PID 3996 wrote to memory of 3108	3996	JaffaCakes118_d0987197c55ff69af9b2a6f385be5ac4.exe	86
PID 3996 wrote to memory of 3108	3996	JaffaCakes118_d0987197c55ff69af9b2a6f385be5ac4.exe	86
PID 3996 wrote to memory of 3108	3996	JaffaCakes118_d0987197c55ff69af9b2a6f385be5ac4.exe	86
PID 3996 wrote to memory of 1852	3996	JaffaCakes118_d0987197c55ff69af9b2a6f385be5ac4.exe	88
PID 3996 wrote to memory of 1852	3996	JaffaCakes118_d0987197c55ff69af9b2a6f385be5ac4.exe	88
PID 3996 wrote to memory of 1852	3996	JaffaCakes118_d0987197c55ff69af9b2a6f385be5ac4.exe	88
PID 3996 wrote to memory of 3744	3996	JaffaCakes118_d0987197c55ff69af9b2a6f385be5ac4.exe	90
PID 3996 wrote to memory of 3744	3996	JaffaCakes118_d0987197c55ff69af9b2a6f385be5ac4.exe	90
PID 3996 wrote to memory of 3744	3996	JaffaCakes118_d0987197c55ff69af9b2a6f385be5ac4.exe	90
PID 3996 wrote to memory of 3624	3996	JaffaCakes118_d0987197c55ff69af9b2a6f385be5ac4.exe	93
PID 3996 wrote to memory of 3624	3996	JaffaCakes118_d0987197c55ff69af9b2a6f385be5ac4.exe	93
PID 3996 wrote to memory of 3624	3996	JaffaCakes118_d0987197c55ff69af9b2a6f385be5ac4.exe	93
PID 3500 wrote to memory of 812	3500	nuxvwwma.exe	98
PID 3500 wrote to memory of 812	3500	nuxvwwma.exe	98
PID 3500 wrote to memory of 812	3500	nuxvwwma.exe	98
PID 3500 wrote to memory of 812	3500	nuxvwwma.exe	98
PID 3500 wrote to memory of 812	3500	nuxvwwma.exe	98

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_d0987197c55ff69af9b2a6f385be5ac4.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_d0987197c55ff69af9b2a6f385be5ac4.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3996
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ysczspnx\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:392
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nuxvwwma.exe" C:\Windows\SysWOW64\ysczspnx\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3256
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ysczspnx binPath= "C:\Windows\SysWOW64\ysczspnx\nuxvwwma.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_d0987197c55ff69af9b2a6f385be5ac4.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3108
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ysczspnx "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1852
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ysczspnx
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3744
- 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:3624
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3996 -s 1040
  2⤵
  - Program crash
  PID:1336

C:\Windows\SysWOW64\ysczspnx\nuxvwwma.exe
C:\Windows\SysWOW64\ysczspnx\nuxvwwma.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_d0987197c55ff69af9b2a6f385be5ac4.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3500
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:812
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3500 -s 520
  2⤵
  - Program crash
  PID:4084

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3996 -ip 3996
1⤵
PID:756

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 3500 -ip 3500
1⤵
PID:1492

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\nuxvwwma.exe

Filesize
14.7MB

MD5
12aaaeaff4e6c3c008c414a366427c1e

SHA1
1ab9e72af687dd3a961aafb9fd22fc924edf151e

SHA256
031f7428efd998cc6a06c9a605f387f33b12415b3b218bad80d3f7af0ca0d217

SHA512
fc8493096f798891885a9309e212fd142240451d01a5dd810559b9e846fd28ae4470cc5f8b9002e5bdb6023656243e851c8e6f83ec53932823130b9fb8505cfa

Download Submit
memory/812-15-0x00000000004E0000-0x00000000004F5000-memory.dmp

Filesize
84KB

Download
memory/812-12-0x00000000004E0000-0x00000000004F5000-memory.dmp

Filesize
84KB

Download
memory/812-17-0x00000000004E0000-0x00000000004F5000-memory.dmp

Filesize
84KB

Download
memory/3500-11-0x0000000000400000-0x000000000086B000-memory.dmp

Filesize
4.4MB

Download
memory/3500-14-0x0000000000400000-0x000000000086B000-memory.dmp

Filesize
4.4MB

Download
memory/3500-16-0x0000000000400000-0x000000000086B000-memory.dmp

Filesize
4.4MB

Download
memory/3500-19-0x0000000000400000-0x000000000086B000-memory.dmp

Filesize
4.4MB

Download
memory/3996-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3996-2-0x00000000009B0000-0x00000000009C3000-memory.dmp

Filesize
76KB

Download
memory/3996-8-0x0000000000400000-0x000000000086B000-memory.dmp

Filesize
4.4MB

Download
memory/3996-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3996-9-0x00000000009B0000-0x00000000009C3000-memory.dmp

Filesize
76KB

Download
memory/3996-1-0x0000000000B20000-0x0000000000C20000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads