tofsee | 1a9635e2c0826b41c605607cba1a1894d89f150b241904305125991c898329c0

General

Target

JaffaCakes118_f079c6c46c53a7a3204bd06eea7155dd.exe
Size

11.9MB
MD5

f079c6c46c53a7a3204bd06eea7155dd
SHA1

19d3e8f4dfb84955bbeec82dc3ad0144fabc54e6
SHA256

1a9635e2c0826b41c605607cba1a1894d89f150b241904305125991c898329c0
SHA512

af24ceabbcf886f70d6b662a4ca7e1501c3d9db0173e7f445671d53d6d8bfb028a5078c621b8cb2f62f8b320c8bc6634dfaa9b8cd1d8db69aca590f927198698
SSDEEP

98304:gwfDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDr:gw

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
4544	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\wtjeznjr\ImagePath = "C:\\Windows\\SysWOW64\\wtjeznjr\\pbwtazzn.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-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	JaffaCakes118_f079c6c46c53a7a3204bd06eea7155dd.exe

Deletes itself 1 IoCs

pid	Process
2524	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3856	pbwtazzn.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3856 set thread context of 2524	3856	pbwtazzn.exe	100

Launches sc.exe 3 IoCs

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

pid	Process
2780	sc.exe
4964	sc.exe
2016	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
1936	3644	WerFault.exe	83
4428	3856	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	JaffaCakes118_f079c6c46c53a7a3204bd06eea7155dd.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	pbwtazzn.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.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

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3644 wrote to memory of 4032	3644	JaffaCakes118_f079c6c46c53a7a3204bd06eea7155dd.exe	84
PID 3644 wrote to memory of 4032	3644	JaffaCakes118_f079c6c46c53a7a3204bd06eea7155dd.exe	84
PID 3644 wrote to memory of 4032	3644	JaffaCakes118_f079c6c46c53a7a3204bd06eea7155dd.exe	84
PID 3644 wrote to memory of 4384	3644	JaffaCakes118_f079c6c46c53a7a3204bd06eea7155dd.exe	86
PID 3644 wrote to memory of 4384	3644	JaffaCakes118_f079c6c46c53a7a3204bd06eea7155dd.exe	86
PID 3644 wrote to memory of 4384	3644	JaffaCakes118_f079c6c46c53a7a3204bd06eea7155dd.exe	86
PID 3644 wrote to memory of 4964	3644	JaffaCakes118_f079c6c46c53a7a3204bd06eea7155dd.exe	88
PID 3644 wrote to memory of 4964	3644	JaffaCakes118_f079c6c46c53a7a3204bd06eea7155dd.exe	88
PID 3644 wrote to memory of 4964	3644	JaffaCakes118_f079c6c46c53a7a3204bd06eea7155dd.exe	88
PID 3644 wrote to memory of 2016	3644	JaffaCakes118_f079c6c46c53a7a3204bd06eea7155dd.exe	90
PID 3644 wrote to memory of 2016	3644	JaffaCakes118_f079c6c46c53a7a3204bd06eea7155dd.exe	90
PID 3644 wrote to memory of 2016	3644	JaffaCakes118_f079c6c46c53a7a3204bd06eea7155dd.exe	90
PID 3644 wrote to memory of 2780	3644	JaffaCakes118_f079c6c46c53a7a3204bd06eea7155dd.exe	92
PID 3644 wrote to memory of 2780	3644	JaffaCakes118_f079c6c46c53a7a3204bd06eea7155dd.exe	92
PID 3644 wrote to memory of 2780	3644	JaffaCakes118_f079c6c46c53a7a3204bd06eea7155dd.exe	92
PID 3644 wrote to memory of 4544	3644	JaffaCakes118_f079c6c46c53a7a3204bd06eea7155dd.exe	95
PID 3644 wrote to memory of 4544	3644	JaffaCakes118_f079c6c46c53a7a3204bd06eea7155dd.exe	95
PID 3644 wrote to memory of 4544	3644	JaffaCakes118_f079c6c46c53a7a3204bd06eea7155dd.exe	95
PID 3856 wrote to memory of 2524	3856	pbwtazzn.exe	100
PID 3856 wrote to memory of 2524	3856	pbwtazzn.exe	100
PID 3856 wrote to memory of 2524	3856	pbwtazzn.exe	100
PID 3856 wrote to memory of 2524	3856	pbwtazzn.exe	100
PID 3856 wrote to memory of 2524	3856	pbwtazzn.exe	100

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_f079c6c46c53a7a3204bd06eea7155dd.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_f079c6c46c53a7a3204bd06eea7155dd.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3644
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wtjeznjr\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4032
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pbwtazzn.exe" C:\Windows\SysWOW64\wtjeznjr\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4384
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create wtjeznjr binPath= "C:\Windows\SysWOW64\wtjeznjr\pbwtazzn.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_f079c6c46c53a7a3204bd06eea7155dd.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4964
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description wtjeznjr "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2016
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start wtjeznjr
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2780
- 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:4544
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3644 -s 1284
  2⤵
  - Program crash
  PID:1936

C:\Windows\SysWOW64\wtjeznjr\pbwtazzn.exe
C:\Windows\SysWOW64\wtjeznjr\pbwtazzn.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_f079c6c46c53a7a3204bd06eea7155dd.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3856
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2524
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3856 -s 508
  2⤵
  - Program crash
  PID:4428

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3644 -ip 3644
1⤵
PID:972

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3856 -ip 3856
1⤵
PID:516

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\pbwtazzn.exe

Filesize
14.1MB

MD5
778523d96ba181777f59339c9576f425

SHA1
cbb3f497a6ff380a36f9410545eac57f9a2b63ea

SHA256
5a5e2c8039628a0f4c056d406570d69c4606f36b28204bd5b5197c83c6d7337d

SHA512
ddba409353579ba711687c78336b53960d5f5ecefd26451c494284f7338283212d31e048048ce8794fffe594240210f0e1e13071608dce4c76a530f4f8bef364

Download Submit
memory/2524-14-0x0000000000620000-0x0000000000635000-memory.dmp

Filesize
84KB

Download
memory/2524-17-0x0000000000620000-0x0000000000635000-memory.dmp

Filesize
84KB

Download
memory/2524-16-0x0000000000620000-0x0000000000635000-memory.dmp

Filesize
84KB

Download
memory/3644-8-0x0000000000400000-0x0000000000446000-memory.dmp

Filesize
280KB

Download
memory/3644-9-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/3644-1-0x00000000006F0000-0x00000000007F0000-memory.dmp

Filesize
1024KB

Download
memory/3644-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3644-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3644-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/3856-11-0x0000000000400000-0x0000000000446000-memory.dmp

Filesize
280KB

Download
memory/3856-12-0x0000000000400000-0x0000000000446000-memory.dmp

Filesize
280KB

Download
memory/3856-13-0x0000000000400000-0x0000000000446000-memory.dmp

Filesize
280KB

Download
memory/3856-18-0x0000000000400000-0x0000000000446000-memory.dmp

Filesize
280KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads