tofsee | c655e59546447547e0b3a212f95ec11f56a2180b9fcbe07d13b32e1ca824d07d

General

Target

JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe
Size

13.0MB
MD5

1fe610316eb9a8d8526f9942a34cef4f
SHA1

0c8fc94e795a25cfe499447432ac55b13618ca2b
SHA256

c655e59546447547e0b3a212f95ec11f56a2180b9fcbe07d13b32e1ca824d07d
SHA512

b91713bd86f0bdfde263588f517b4ddf8aafc370efa04a836235307e31489a4bb862992de0486839bfdc84e8c17d004c6d81d4d77bde867fc59d2711acb57e0f
SSDEEP

196608:lYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYv:

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
4956	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\zkuswbkv\ImagePath = "C:\\Windows\\SysWOW64\\zkuswbkv\\kuzmtonc.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_1fe610316eb9a8d8526f9942a34cef4f.exe

Deletes itself 1 IoCs

pid	Process
2792	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4800	kuzmtonc.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4800 set thread context of 2792	4800	kuzmtonc.exe	104

Launches sc.exe 3 IoCs

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

pid	Process
4892	sc.exe
3312	sc.exe
3376	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 queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
2936	2248	WerFault.exe	82
4740	4800	WerFault.exe	95

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_1fe610316eb9a8d8526f9942a34cef4f.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
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	kuzmtonc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2248 wrote to memory of 4772	2248	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	83
PID 2248 wrote to memory of 4772	2248	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	83
PID 2248 wrote to memory of 4772	2248	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	83
PID 2248 wrote to memory of 764	2248	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	85
PID 2248 wrote to memory of 764	2248	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	85
PID 2248 wrote to memory of 764	2248	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	85
PID 2248 wrote to memory of 4892	2248	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	87
PID 2248 wrote to memory of 4892	2248	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	87
PID 2248 wrote to memory of 4892	2248	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	87
PID 2248 wrote to memory of 3312	2248	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	89
PID 2248 wrote to memory of 3312	2248	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	89
PID 2248 wrote to memory of 3312	2248	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	89
PID 2248 wrote to memory of 3376	2248	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	93
PID 2248 wrote to memory of 3376	2248	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	93
PID 2248 wrote to memory of 3376	2248	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	93
PID 2248 wrote to memory of 4956	2248	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	96
PID 2248 wrote to memory of 4956	2248	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	96
PID 2248 wrote to memory of 4956	2248	JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe	96
PID 4800 wrote to memory of 2792	4800	kuzmtonc.exe	104
PID 4800 wrote to memory of 2792	4800	kuzmtonc.exe	104
PID 4800 wrote to memory of 2792	4800	kuzmtonc.exe	104
PID 4800 wrote to memory of 2792	4800	kuzmtonc.exe	104
PID 4800 wrote to memory of 2792	4800	kuzmtonc.exe	104

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2248
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zkuswbkv\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4772
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\kuzmtonc.exe" C:\Windows\SysWOW64\zkuswbkv\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:764
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create zkuswbkv binPath= "C:\Windows\SysWOW64\zkuswbkv\kuzmtonc.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4892
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description zkuswbkv "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3312
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start zkuswbkv
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3376
- 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:4956
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2248 -s 1032
  2⤵
  - Program crash
  PID:2936

C:\Windows\SysWOW64\zkuswbkv\kuzmtonc.exe
C:\Windows\SysWOW64\zkuswbkv\kuzmtonc.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1fe610316eb9a8d8526f9942a34cef4f.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4800
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2792
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4800 -s 512
  2⤵
  - Program crash
  PID:4740

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2248 -ip 2248
1⤵
PID:3912

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 4800 -ip 4800
1⤵
PID:4216

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\kuzmtonc.exe

Filesize
12.7MB

MD5
a7c67cc15f11747444f996a7ceff8f3f

SHA1
cb0af4c32f0e1348b3d8227abffe6333649fe733

SHA256
cd51d20991b38bc37fe21404c0c67805c8241881b129968b19fcce74215e49cb

SHA512
4c1f3c7685ca0861fa44a826d18072927a3c8bd6a4beb0c61409587b410bc90acb7077ef158d41b5600cbfc16b44d2e1e055a8d5f5055e3772fdbece3c6aeacf

Download Submit
memory/2248-1-0x00000000030B0000-0x00000000031B0000-memory.dmp

Filesize
1024KB

Download
memory/2248-2-0x0000000004C50000-0x0000000004C63000-memory.dmp

Filesize
76KB

Download
memory/2248-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2248-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2248-9-0x0000000004C50000-0x0000000004C63000-memory.dmp

Filesize
76KB

Download
memory/2248-8-0x0000000000400000-0x0000000002F0D000-memory.dmp

Filesize
43.1MB

Download
memory/2792-11-0x0000000000C70000-0x0000000000C85000-memory.dmp

Filesize
84KB

Download
memory/2792-13-0x0000000000C70000-0x0000000000C85000-memory.dmp

Filesize
84KB

Download
memory/2792-14-0x0000000000C70000-0x0000000000C85000-memory.dmp

Filesize
84KB

Download
memory/4800-15-0x0000000000400000-0x0000000002F0D000-memory.dmp

Filesize
43.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads