tofsee | 94f3a611c239a6b1c3299127bdfcc989d979e6e701cf0662a1f8cabdeaea5227

General

Target

JaffaCakes118_75a2fd988159ad2855f0d8e85b72a5e6.exe
Size

14.1MB
MD5

75a2fd988159ad2855f0d8e85b72a5e6
SHA1

86bc86cddb0fb7c8a1e9297a5587ba5e2e027003
SHA256

94f3a611c239a6b1c3299127bdfcc989d979e6e701cf0662a1f8cabdeaea5227
SHA512

0f152c1e9f026d8cc5302c26b356cca73aabaf177d20a8de471dd9a944eb57d49f5c08b038ffa2db1ef96092fadb480eb2fe0e48013180b06b53326744b30ca8
SSDEEP

196608:EFIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIP:E

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
3992	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\urjpfwk\ImagePath = "C:\\Windows\\SysWOW64\\urjpfwk\\eyualvnt.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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	JaffaCakes118_75a2fd988159ad2855f0d8e85b72a5e6.exe

Deletes itself 1 IoCs

pid	Process
1400	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
748	eyualvnt.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 748 set thread context of 1400	748	eyualvnt.exe	100

Launches sc.exe 3 IoCs

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

pid	Process
4556	sc.exe
3872	sc.exe
3784	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
3252	448	WerFault.exe	82
3820	748	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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	eyualvnt.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	JaffaCakes118_75a2fd988159ad2855f0d8e85b72a5e6.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 448 wrote to memory of 3620	448	JaffaCakes118_75a2fd988159ad2855f0d8e85b72a5e6.exe	83
PID 448 wrote to memory of 3620	448	JaffaCakes118_75a2fd988159ad2855f0d8e85b72a5e6.exe	83
PID 448 wrote to memory of 3620	448	JaffaCakes118_75a2fd988159ad2855f0d8e85b72a5e6.exe	83
PID 448 wrote to memory of 4296	448	JaffaCakes118_75a2fd988159ad2855f0d8e85b72a5e6.exe	85
PID 448 wrote to memory of 4296	448	JaffaCakes118_75a2fd988159ad2855f0d8e85b72a5e6.exe	85
PID 448 wrote to memory of 4296	448	JaffaCakes118_75a2fd988159ad2855f0d8e85b72a5e6.exe	85
PID 448 wrote to memory of 3784	448	JaffaCakes118_75a2fd988159ad2855f0d8e85b72a5e6.exe	87
PID 448 wrote to memory of 3784	448	JaffaCakes118_75a2fd988159ad2855f0d8e85b72a5e6.exe	87
PID 448 wrote to memory of 3784	448	JaffaCakes118_75a2fd988159ad2855f0d8e85b72a5e6.exe	87
PID 448 wrote to memory of 4556	448	JaffaCakes118_75a2fd988159ad2855f0d8e85b72a5e6.exe	89
PID 448 wrote to memory of 4556	448	JaffaCakes118_75a2fd988159ad2855f0d8e85b72a5e6.exe	89
PID 448 wrote to memory of 4556	448	JaffaCakes118_75a2fd988159ad2855f0d8e85b72a5e6.exe	89
PID 448 wrote to memory of 3872	448	JaffaCakes118_75a2fd988159ad2855f0d8e85b72a5e6.exe	91
PID 448 wrote to memory of 3872	448	JaffaCakes118_75a2fd988159ad2855f0d8e85b72a5e6.exe	91
PID 448 wrote to memory of 3872	448	JaffaCakes118_75a2fd988159ad2855f0d8e85b72a5e6.exe	91
PID 448 wrote to memory of 3992	448	JaffaCakes118_75a2fd988159ad2855f0d8e85b72a5e6.exe	94
PID 448 wrote to memory of 3992	448	JaffaCakes118_75a2fd988159ad2855f0d8e85b72a5e6.exe	94
PID 448 wrote to memory of 3992	448	JaffaCakes118_75a2fd988159ad2855f0d8e85b72a5e6.exe	94
PID 748 wrote to memory of 1400	748	eyualvnt.exe	100
PID 748 wrote to memory of 1400	748	eyualvnt.exe	100
PID 748 wrote to memory of 1400	748	eyualvnt.exe	100
PID 748 wrote to memory of 1400	748	eyualvnt.exe	100
PID 748 wrote to memory of 1400	748	eyualvnt.exe	100

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_75a2fd988159ad2855f0d8e85b72a5e6.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_75a2fd988159ad2855f0d8e85b72a5e6.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:448
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\urjpfwk\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3620
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\eyualvnt.exe" C:\Windows\SysWOW64\urjpfwk\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4296
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create urjpfwk binPath= "C:\Windows\SysWOW64\urjpfwk\eyualvnt.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_75a2fd988159ad2855f0d8e85b72a5e6.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3784
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description urjpfwk "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4556
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start urjpfwk
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3872
- 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:3992
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 448 -s 1044
  2⤵
  - Program crash
  PID:3252

C:\Windows\SysWOW64\urjpfwk\eyualvnt.exe
C:\Windows\SysWOW64\urjpfwk\eyualvnt.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_75a2fd988159ad2855f0d8e85b72a5e6.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:748
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1400
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 748 -s 528
  2⤵
  - Program crash
  PID:3820

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 448 -ip 448
1⤵
PID:228

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 748 -ip 748
1⤵
PID:2884

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\eyualvnt.exe

Filesize
14.9MB

MD5
9080aae4e87f293792ca9bf20d12eaed

SHA1
d2a86946b1956e3d68fcd89f8043ed5dac18113f

SHA256
3bbc56717390f69f31289e2c43d4cf61d970180ce794720e62319dfcf7f28065

SHA512
fce0dc1058be85121a84ed0d235ed5af81d0f75cc5c168447d7fd56df0fd87f43f7059394584ce2ea09c96b91f145d5e9e775e33406e07ba90e45a0ee5a78860

Download Submit
memory/448-9-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/448-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/448-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/448-8-0x0000000000400000-0x0000000000871000-memory.dmp

Filesize
4.4MB

Download
memory/448-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/448-1-0x00000000008E0000-0x00000000009E0000-memory.dmp

Filesize
1024KB

Download
memory/748-11-0x0000000000400000-0x0000000000871000-memory.dmp

Filesize
4.4MB

Download
memory/748-12-0x0000000000400000-0x0000000000871000-memory.dmp

Filesize
4.4MB

Download
memory/748-17-0x0000000000400000-0x0000000000871000-memory.dmp

Filesize
4.4MB

Download
memory/1400-15-0x0000000000F50000-0x0000000000F65000-memory.dmp

Filesize
84KB

Download
memory/1400-13-0x0000000000F50000-0x0000000000F65000-memory.dmp

Filesize
84KB

Download
memory/1400-16-0x0000000000F50000-0x0000000000F65000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads