tofsee | e795596b2e5113cab4a35820e92b959f34d80073f37cad1ed3562f211e78eea8

General

Target

JaffaCakes118_e795596b2e5113cab4a35820e92b959f34d80073f37cad1ed3562f211e78eea8.exe
Size

169KB
MD5

45be4376d6c6903addb6ad864275bcb7
SHA1

e732be614af25f4fa951daf78c4ac329c824caec
SHA256

e795596b2e5113cab4a35820e92b959f34d80073f37cad1ed3562f211e78eea8
SHA512

71ceb49d51d971a0d21c5257cee5f16b604bb5f95bbda983f4f4dbc1ed297e3710428ec25d3512d7eb340462a13430736b400b8210e33aeed4d5d7646cff63bd
SSDEEP

3072:sPnHfTpEBgSJMflwsC7kAobUaKbEOdqSd89MRrGZbZFAR2:unHLpEBgzwpdsUdE2xqMRrGZb

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

quadoil.ru

lakeflex.ru

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
2364	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\rsfmbtuk\ImagePath = "C:\\Windows\\SysWOW64\\rsfmbtuk\\nfxedufm.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-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	JaffaCakes118_e795596b2e5113cab4a35820e92b959f34d80073f37cad1ed3562f211e78eea8.exe

Deletes itself 1 IoCs

pid	Process
1492	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2472	nfxedufm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2472 set thread context of 1492	2472	nfxedufm.exe	94

Launches sc.exe 3 IoCs

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

pid	Process
1608	sc.exe
4500	sc.exe
3728	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
2120	1808	WerFault.exe	82
3688	2472	WerFault.exe	93

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_e795596b2e5113cab4a35820e92b959f34d80073f37cad1ed3562f211e78eea8.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	nfxedufm.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	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 1808 wrote to memory of 5112	1808	JaffaCakes118_e795596b2e5113cab4a35820e92b959f34d80073f37cad1ed3562f211e78eea8.exe	83
PID 1808 wrote to memory of 5112	1808	JaffaCakes118_e795596b2e5113cab4a35820e92b959f34d80073f37cad1ed3562f211e78eea8.exe	83
PID 1808 wrote to memory of 5112	1808	JaffaCakes118_e795596b2e5113cab4a35820e92b959f34d80073f37cad1ed3562f211e78eea8.exe	83
PID 1808 wrote to memory of 3260	1808	JaffaCakes118_e795596b2e5113cab4a35820e92b959f34d80073f37cad1ed3562f211e78eea8.exe	85
PID 1808 wrote to memory of 3260	1808	JaffaCakes118_e795596b2e5113cab4a35820e92b959f34d80073f37cad1ed3562f211e78eea8.exe	85
PID 1808 wrote to memory of 3260	1808	JaffaCakes118_e795596b2e5113cab4a35820e92b959f34d80073f37cad1ed3562f211e78eea8.exe	85
PID 1808 wrote to memory of 3728	1808	JaffaCakes118_e795596b2e5113cab4a35820e92b959f34d80073f37cad1ed3562f211e78eea8.exe	87
PID 1808 wrote to memory of 3728	1808	JaffaCakes118_e795596b2e5113cab4a35820e92b959f34d80073f37cad1ed3562f211e78eea8.exe	87
PID 1808 wrote to memory of 3728	1808	JaffaCakes118_e795596b2e5113cab4a35820e92b959f34d80073f37cad1ed3562f211e78eea8.exe	87
PID 1808 wrote to memory of 1608	1808	JaffaCakes118_e795596b2e5113cab4a35820e92b959f34d80073f37cad1ed3562f211e78eea8.exe	89
PID 1808 wrote to memory of 1608	1808	JaffaCakes118_e795596b2e5113cab4a35820e92b959f34d80073f37cad1ed3562f211e78eea8.exe	89
PID 1808 wrote to memory of 1608	1808	JaffaCakes118_e795596b2e5113cab4a35820e92b959f34d80073f37cad1ed3562f211e78eea8.exe	89
PID 1808 wrote to memory of 4500	1808	JaffaCakes118_e795596b2e5113cab4a35820e92b959f34d80073f37cad1ed3562f211e78eea8.exe	91
PID 1808 wrote to memory of 4500	1808	JaffaCakes118_e795596b2e5113cab4a35820e92b959f34d80073f37cad1ed3562f211e78eea8.exe	91
PID 1808 wrote to memory of 4500	1808	JaffaCakes118_e795596b2e5113cab4a35820e92b959f34d80073f37cad1ed3562f211e78eea8.exe	91
PID 2472 wrote to memory of 1492	2472	nfxedufm.exe	94
PID 2472 wrote to memory of 1492	2472	nfxedufm.exe	94
PID 2472 wrote to memory of 1492	2472	nfxedufm.exe	94
PID 2472 wrote to memory of 1492	2472	nfxedufm.exe	94
PID 2472 wrote to memory of 1492	2472	nfxedufm.exe	94
PID 1808 wrote to memory of 2364	1808	JaffaCakes118_e795596b2e5113cab4a35820e92b959f34d80073f37cad1ed3562f211e78eea8.exe	96
PID 1808 wrote to memory of 2364	1808	JaffaCakes118_e795596b2e5113cab4a35820e92b959f34d80073f37cad1ed3562f211e78eea8.exe	96
PID 1808 wrote to memory of 2364	1808	JaffaCakes118_e795596b2e5113cab4a35820e92b959f34d80073f37cad1ed3562f211e78eea8.exe	96

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_e795596b2e5113cab4a35820e92b959f34d80073f37cad1ed3562f211e78eea8.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_e795596b2e5113cab4a35820e92b959f34d80073f37cad1ed3562f211e78eea8.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1808
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rsfmbtuk\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:5112
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nfxedufm.exe" C:\Windows\SysWOW64\rsfmbtuk\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3260
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create rsfmbtuk binPath= "C:\Windows\SysWOW64\rsfmbtuk\nfxedufm.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_e795596b2e5113cab4a35820e92b959f34d80073f37cad1ed3562f211e78eea8.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3728
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description rsfmbtuk "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1608
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start rsfmbtuk
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4500
- 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:2364
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1808 -s 1348
  2⤵
  - Program crash
  PID:2120

C:\Windows\SysWOW64\rsfmbtuk\nfxedufm.exe
C:\Windows\SysWOW64\rsfmbtuk\nfxedufm.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_e795596b2e5113cab4a35820e92b959f34d80073f37cad1ed3562f211e78eea8.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2472
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1492
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2472 -s 524
  2⤵
  - Program crash
  PID:3688

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 2472 -ip 2472
1⤵
PID:3880

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 496 -p 1808 -ip 1808
1⤵
PID:2684

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\nfxedufm.exe

Filesize
10.7MB

MD5
fcc396a7480f85f0023cea15eab0914a

SHA1
e3543f87e8fdbf2db1f4b42392c0a9da212a07af

SHA256
adc746824d4895315e0d263561569e94bc9cb6638f225e08aee4e9167d582170

SHA512
e6b765bc99f3149f252059ee25874b5f35e21811706c10584c0a9443d9a8f17919cae36fecd5020d0bc27dc939a0d79bc5d9b289b32263ac8e77fdee883cfdd8

Download Submit
memory/1492-8-0x0000000000570000-0x0000000000585000-memory.dmp

Filesize
84KB

Download
memory/1492-20-0x0000000000570000-0x0000000000585000-memory.dmp

Filesize
84KB

Download
memory/1492-18-0x0000000000570000-0x0000000000585000-memory.dmp

Filesize
84KB

Download
memory/1492-11-0x0000000000570000-0x0000000000585000-memory.dmp

Filesize
84KB

Download
memory/1492-19-0x0000000000570000-0x0000000000585000-memory.dmp

Filesize
84KB

Download
memory/1808-2-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1808-1-0x0000000000700000-0x0000000000713000-memory.dmp

Filesize
76KB

Download
memory/1808-0-0x00000000005D0000-0x00000000005DD000-memory.dmp

Filesize
52KB

Download
memory/1808-16-0x0000000000700000-0x0000000000713000-memory.dmp

Filesize
76KB

Download
memory/1808-17-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1808-14-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/1808-15-0x00000000005D0000-0x00000000005DD000-memory.dmp

Filesize
52KB

Download
memory/2472-6-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2472-13-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2472-7-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads