tofsee | 2477e4fdf1faf8de44ab120dc92ed7f485ce0c4cb734574907a7776b70265aee

General

Target

673fd280acc70fb5a29c183c583b5435_JaffaCakes118.exe
Size

12.2MB
MD5

673fd280acc70fb5a29c183c583b5435
SHA1

18a44308d157d47d534c6d8059a831ac38c43125
SHA256

2477e4fdf1faf8de44ab120dc92ed7f485ce0c4cb734574907a7776b70265aee
SHA512

b38862ecebf3aadb59ada9efba0ebec09ec23903352b36735f9e8c17b324c1800791af1bd5a95153dcb29ed99c10ab7dd04ec9fb6cecfc2a70827707788206e5
SSDEEP

12288:06oEnffffffffffffffffffffffffffffffffffffffffffffffffffffffffff/:06

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
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

Processes:

netsh.exe

pid	Process
4616	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\jmijyenw\ImagePath = "C:\\Windows\\SysWOW64\\jmijyenw\\nusdidrf.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

Processes:

673fd280acc70fb5a29c183c583b5435_JaffaCakes118.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	673fd280acc70fb5a29c183c583b5435_JaffaCakes118.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid	Process
3740	svchost.exe

Executes dropped EXE 1 IoCs

Processes:

nusdidrf.exe

pid	Process
444	nusdidrf.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

nusdidrf.exe

description	pid	Process	procid_target
PID 444 set thread context of 3740	444	nusdidrf.exe	108

Launches sc.exe 3 IoCs

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

Processes:

sc.exesc.exesc.exe

pid	Process
1156	sc.exe
2772	sc.exe
4876	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

Processes:

netsh.exe

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

Processes:

WerFault.exeWerFault.exe

pid	pid_target	Process	procid_target
1692	4908	WerFault.exe	83
4824	444	WerFault.exe	102

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

Processes:

cmd.exesc.exesc.exenusdidrf.exesvchost.exe673fd280acc70fb5a29c183c583b5435_JaffaCakes118.execmd.exesc.exenetsh.exe

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	nusdidrf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	673fd280acc70fb5a29c183c583b5435_JaffaCakes118.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

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

673fd280acc70fb5a29c183c583b5435_JaffaCakes118.exenusdidrf.exe

description	pid	Process	procid_target
PID 4908 wrote to memory of 3824	4908	673fd280acc70fb5a29c183c583b5435_JaffaCakes118.exe	87
PID 4908 wrote to memory of 3824	4908	673fd280acc70fb5a29c183c583b5435_JaffaCakes118.exe	87
PID 4908 wrote to memory of 3824	4908	673fd280acc70fb5a29c183c583b5435_JaffaCakes118.exe	87
PID 4908 wrote to memory of 3532	4908	673fd280acc70fb5a29c183c583b5435_JaffaCakes118.exe	92
PID 4908 wrote to memory of 3532	4908	673fd280acc70fb5a29c183c583b5435_JaffaCakes118.exe	92
PID 4908 wrote to memory of 3532	4908	673fd280acc70fb5a29c183c583b5435_JaffaCakes118.exe	92
PID 4908 wrote to memory of 1156	4908	673fd280acc70fb5a29c183c583b5435_JaffaCakes118.exe	94
PID 4908 wrote to memory of 1156	4908	673fd280acc70fb5a29c183c583b5435_JaffaCakes118.exe	94
PID 4908 wrote to memory of 1156	4908	673fd280acc70fb5a29c183c583b5435_JaffaCakes118.exe	94
PID 4908 wrote to memory of 2772	4908	673fd280acc70fb5a29c183c583b5435_JaffaCakes118.exe	98
PID 4908 wrote to memory of 2772	4908	673fd280acc70fb5a29c183c583b5435_JaffaCakes118.exe	98
PID 4908 wrote to memory of 2772	4908	673fd280acc70fb5a29c183c583b5435_JaffaCakes118.exe	98
PID 4908 wrote to memory of 4876	4908	673fd280acc70fb5a29c183c583b5435_JaffaCakes118.exe	100
PID 4908 wrote to memory of 4876	4908	673fd280acc70fb5a29c183c583b5435_JaffaCakes118.exe	100
PID 4908 wrote to memory of 4876	4908	673fd280acc70fb5a29c183c583b5435_JaffaCakes118.exe	100
PID 4908 wrote to memory of 4616	4908	673fd280acc70fb5a29c183c583b5435_JaffaCakes118.exe	103
PID 4908 wrote to memory of 4616	4908	673fd280acc70fb5a29c183c583b5435_JaffaCakes118.exe	103
PID 4908 wrote to memory of 4616	4908	673fd280acc70fb5a29c183c583b5435_JaffaCakes118.exe	103
PID 444 wrote to memory of 3740	444	nusdidrf.exe	108
PID 444 wrote to memory of 3740	444	nusdidrf.exe	108
PID 444 wrote to memory of 3740	444	nusdidrf.exe	108
PID 444 wrote to memory of 3740	444	nusdidrf.exe	108
PID 444 wrote to memory of 3740	444	nusdidrf.exe	108

C:\Users\Admin\AppData\Local\Temp\673fd280acc70fb5a29c183c583b5435_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\673fd280acc70fb5a29c183c583b5435_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4908
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jmijyenw\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3824
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nusdidrf.exe" C:\Windows\SysWOW64\jmijyenw\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3532
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create jmijyenw binPath= "C:\Windows\SysWOW64\jmijyenw\nusdidrf.exe /d\"C:\Users\Admin\AppData\Local\Temp\673fd280acc70fb5a29c183c583b5435_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1156
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description jmijyenw "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2772
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start jmijyenw
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4876
- 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:4616
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4908 -s 800
  2⤵
  - Program crash
  PID:1692

C:\Windows\SysWOW64\jmijyenw\nusdidrf.exe
C:\Windows\SysWOW64\jmijyenw\nusdidrf.exe /d"C:\Users\Admin\AppData\Local\Temp\673fd280acc70fb5a29c183c583b5435_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:444
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3740
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 444 -s 512
  2⤵
  - Program crash
  PID:4824

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 4908 -ip 4908
1⤵
PID:3700

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 444 -ip 444
1⤵
PID:4088

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\nusdidrf.exe

Filesize
11.2MB

MD5
6bc86a020a87a6332312376e2e343c5b

SHA1
6a185be14ae8294ede919b4fc8df376a0e67b47a

SHA256
55746f2609fe4d1224acac4e8806ab75395baced18843a85d7164a070c87580c

SHA512
4e1b9ca57f302a80d8e6669423902596411eb7e9eace13a46bbf92cfc368a10f98b8752bfcc1c1062ec832a18516f7dd03e34e9b119900e5320d9ed0a0975031

Download Submit
memory/444-13-0x0000000000400000-0x00000000004AD000-memory.dmp

Filesize
692KB

Download
memory/444-12-0x0000000000400000-0x00000000004AD000-memory.dmp

Filesize
692KB

Download
memory/444-11-0x0000000000400000-0x00000000004AD000-memory.dmp

Filesize
692KB

Download
memory/444-18-0x0000000000400000-0x00000000004AD000-memory.dmp

Filesize
692KB

Download
memory/3740-14-0x0000000000F60000-0x0000000000F75000-memory.dmp

Filesize
84KB

Download
memory/3740-16-0x0000000000F60000-0x0000000000F75000-memory.dmp

Filesize
84KB

Download
memory/3740-17-0x0000000000F60000-0x0000000000F75000-memory.dmp

Filesize
84KB

Download
memory/4908-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4908-2-0x00000000021F0000-0x0000000002203000-memory.dmp

Filesize
76KB

Download
memory/4908-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4908-8-0x0000000000400000-0x00000000004AD000-memory.dmp

Filesize
692KB

Download
memory/4908-9-0x00000000021F0000-0x0000000002203000-memory.dmp

Filesize
76KB

Download
memory/4908-1-0x00000000004B0000-0x00000000005B0000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads