tofsee | c00afb3d9875303bb1ca957e8ef8b5f1d086a614fb9d16d91f4a21fe13189145

General

Target

JaffaCakes118_bff20a936e3bc424b95a2eee2989f0dc.exe
Size

11.3MB
MD5

bff20a936e3bc424b95a2eee2989f0dc
SHA1

a6844a289cc3be0c8d6859006066deec2c67d80a
SHA256

c00afb3d9875303bb1ca957e8ef8b5f1d086a614fb9d16d91f4a21fe13189145
SHA512

470e3e5d3def60222b629c94ec543ecfbfe30948fc488a3869bbbadd50c7da81ba24057c10a1911e02c86a346a754671f272309db5022e12a707d56f073be0b2
SSDEEP

6144:09ee3eUmeaedGxyF1t9cj9lxbxaMPaMfh4EfzowLG7:0Ie6TSsyF+jdxacX6kzo4O

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
1292	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\ncrlmvfk\ImagePath = "C:\\Windows\\SysWOW64\\ncrlmvfk\\jzugamqi.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_bff20a936e3bc424b95a2eee2989f0dc.exe

Deletes itself 1 IoCs

pid	Process
620	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1748	jzugamqi.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1748 set thread context of 620	1748	jzugamqi.exe	98

Launches sc.exe 3 IoCs

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

pid	Process
3744	sc.exe
232	sc.exe
1140	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
2916	400	WerFault.exe	81
5000	1748	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	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	jzugamqi.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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_bff20a936e3bc424b95a2eee2989f0dc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 400 wrote to memory of 2784	400	JaffaCakes118_bff20a936e3bc424b95a2eee2989f0dc.exe	82
PID 400 wrote to memory of 2784	400	JaffaCakes118_bff20a936e3bc424b95a2eee2989f0dc.exe	82
PID 400 wrote to memory of 2784	400	JaffaCakes118_bff20a936e3bc424b95a2eee2989f0dc.exe	82
PID 400 wrote to memory of 5072	400	JaffaCakes118_bff20a936e3bc424b95a2eee2989f0dc.exe	84
PID 400 wrote to memory of 5072	400	JaffaCakes118_bff20a936e3bc424b95a2eee2989f0dc.exe	84
PID 400 wrote to memory of 5072	400	JaffaCakes118_bff20a936e3bc424b95a2eee2989f0dc.exe	84
PID 400 wrote to memory of 3744	400	JaffaCakes118_bff20a936e3bc424b95a2eee2989f0dc.exe	86
PID 400 wrote to memory of 3744	400	JaffaCakes118_bff20a936e3bc424b95a2eee2989f0dc.exe	86
PID 400 wrote to memory of 3744	400	JaffaCakes118_bff20a936e3bc424b95a2eee2989f0dc.exe	86
PID 400 wrote to memory of 232	400	JaffaCakes118_bff20a936e3bc424b95a2eee2989f0dc.exe	88
PID 400 wrote to memory of 232	400	JaffaCakes118_bff20a936e3bc424b95a2eee2989f0dc.exe	88
PID 400 wrote to memory of 232	400	JaffaCakes118_bff20a936e3bc424b95a2eee2989f0dc.exe	88
PID 400 wrote to memory of 1140	400	JaffaCakes118_bff20a936e3bc424b95a2eee2989f0dc.exe	90
PID 400 wrote to memory of 1140	400	JaffaCakes118_bff20a936e3bc424b95a2eee2989f0dc.exe	90
PID 400 wrote to memory of 1140	400	JaffaCakes118_bff20a936e3bc424b95a2eee2989f0dc.exe	90
PID 400 wrote to memory of 1292	400	JaffaCakes118_bff20a936e3bc424b95a2eee2989f0dc.exe	93
PID 400 wrote to memory of 1292	400	JaffaCakes118_bff20a936e3bc424b95a2eee2989f0dc.exe	93
PID 400 wrote to memory of 1292	400	JaffaCakes118_bff20a936e3bc424b95a2eee2989f0dc.exe	93
PID 1748 wrote to memory of 620	1748	jzugamqi.exe	98
PID 1748 wrote to memory of 620	1748	jzugamqi.exe	98
PID 1748 wrote to memory of 620	1748	jzugamqi.exe	98
PID 1748 wrote to memory of 620	1748	jzugamqi.exe	98
PID 1748 wrote to memory of 620	1748	jzugamqi.exe	98

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_bff20a936e3bc424b95a2eee2989f0dc.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_bff20a936e3bc424b95a2eee2989f0dc.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:400
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ncrlmvfk\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2784
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jzugamqi.exe" C:\Windows\SysWOW64\ncrlmvfk\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:5072
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ncrlmvfk binPath= "C:\Windows\SysWOW64\ncrlmvfk\jzugamqi.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_bff20a936e3bc424b95a2eee2989f0dc.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3744
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ncrlmvfk "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:232
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ncrlmvfk
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1140
- 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:1292
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 400 -s 1176
  2⤵
  - Program crash
  PID:2916

C:\Windows\SysWOW64\ncrlmvfk\jzugamqi.exe
C:\Windows\SysWOW64\ncrlmvfk\jzugamqi.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_bff20a936e3bc424b95a2eee2989f0dc.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1748
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:620
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1748 -s 516
  2⤵
  - Program crash
  PID:5000

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 400 -ip 400
1⤵
PID:3132

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 1748 -ip 1748
1⤵
PID:1332

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\jzugamqi.exe

Filesize
13.8MB

MD5
f766ee54c7927f63a5dcf1e55c7d74ef

SHA1
645c2e89b482fc4305f76e7662bb68a24f9b3be6

SHA256
0c81fb8593216c003a964b565235c3864ef1850ad6f6547466c52ca753bef922

SHA512
ea5e6f0b4e5d7658648855943e000bb2a19795c01a9e610875b5b5b125755fda2a85ad3d881590ee1b7257646c3e297f14eff0eb250e023c434d872760b7439b

Download Submit
memory/400-12-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/400-4-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/400-1-0x00000000005D0000-0x00000000006D0000-memory.dmp

Filesize
1024KB

Download
memory/400-13-0x00000000005B0000-0x00000000005C3000-memory.dmp

Filesize
76KB

Download
memory/400-14-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/400-2-0x00000000005B0000-0x00000000005C3000-memory.dmp

Filesize
76KB

Download
memory/620-10-0x0000000001080000-0x0000000001095000-memory.dmp

Filesize
84KB

Download
memory/620-17-0x0000000001080000-0x0000000001095000-memory.dmp

Filesize
84KB

Download
memory/620-18-0x0000000001080000-0x0000000001095000-memory.dmp

Filesize
84KB

Download
memory/1748-8-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/1748-9-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/1748-16-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads