tofsee | a70e2a08fe6c8b63eeb217dc9cf3731f70cb41c0c683f57fdfeb5039fceafbf9

General

Target

d00c99b9f288f44b0ec8fdf5cea5e825_JaffaCakes118.exe
Size

13.2MB
MD5

d00c99b9f288f44b0ec8fdf5cea5e825
SHA1

42fc05b2a1a94ae6ebf7a33636a14c083601da0a
SHA256

a70e2a08fe6c8b63eeb217dc9cf3731f70cb41c0c683f57fdfeb5039fceafbf9
SHA512

2e92a6626e745d05436bd6f93dc35d6007581d078dfb7542dbd82ad2193b1d023bee2be4927d8fc7d0de11c86d23f4bcf2421823b4ccdc254877f358d3541abc
SSDEEP

24576:w8l6/KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKq:t

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.ru

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

pid	Process
828	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\hxhvwasd\ImagePath = "C:\\Windows\\SysWOW64\\hxhvwasd\\udxcutok.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-1-5-21-4182098368-2521458979-3782681353-1000\Control Panel\International\Geo\Nation	d00c99b9f288f44b0ec8fdf5cea5e825_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
2980	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4640	udxcutok.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4640 set thread context of 2980	4640	udxcutok.exe	106

Launches sc.exe 3 IoCs

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

pid	Process
3640	sc.exe
5432	sc.exe
6088	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
5576	3612	WerFault.exe	82
5472	4640	WerFault.exe	98

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	cmd.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	d00c99b9f288f44b0ec8fdf5cea5e825_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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	udxcutok.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3612 wrote to memory of 5272	3612	d00c99b9f288f44b0ec8fdf5cea5e825_JaffaCakes118.exe	86
PID 3612 wrote to memory of 5272	3612	d00c99b9f288f44b0ec8fdf5cea5e825_JaffaCakes118.exe	86
PID 3612 wrote to memory of 5272	3612	d00c99b9f288f44b0ec8fdf5cea5e825_JaffaCakes118.exe	86
PID 3612 wrote to memory of 5632	3612	d00c99b9f288f44b0ec8fdf5cea5e825_JaffaCakes118.exe	88
PID 3612 wrote to memory of 5632	3612	d00c99b9f288f44b0ec8fdf5cea5e825_JaffaCakes118.exe	88
PID 3612 wrote to memory of 5632	3612	d00c99b9f288f44b0ec8fdf5cea5e825_JaffaCakes118.exe	88
PID 3612 wrote to memory of 3640	3612	d00c99b9f288f44b0ec8fdf5cea5e825_JaffaCakes118.exe	90
PID 3612 wrote to memory of 3640	3612	d00c99b9f288f44b0ec8fdf5cea5e825_JaffaCakes118.exe	90
PID 3612 wrote to memory of 3640	3612	d00c99b9f288f44b0ec8fdf5cea5e825_JaffaCakes118.exe	90
PID 3612 wrote to memory of 5432	3612	d00c99b9f288f44b0ec8fdf5cea5e825_JaffaCakes118.exe	92
PID 3612 wrote to memory of 5432	3612	d00c99b9f288f44b0ec8fdf5cea5e825_JaffaCakes118.exe	92
PID 3612 wrote to memory of 5432	3612	d00c99b9f288f44b0ec8fdf5cea5e825_JaffaCakes118.exe	92
PID 3612 wrote to memory of 6088	3612	d00c99b9f288f44b0ec8fdf5cea5e825_JaffaCakes118.exe	96
PID 3612 wrote to memory of 6088	3612	d00c99b9f288f44b0ec8fdf5cea5e825_JaffaCakes118.exe	96
PID 3612 wrote to memory of 6088	3612	d00c99b9f288f44b0ec8fdf5cea5e825_JaffaCakes118.exe	96
PID 3612 wrote to memory of 828	3612	d00c99b9f288f44b0ec8fdf5cea5e825_JaffaCakes118.exe	99
PID 3612 wrote to memory of 828	3612	d00c99b9f288f44b0ec8fdf5cea5e825_JaffaCakes118.exe	99
PID 3612 wrote to memory of 828	3612	d00c99b9f288f44b0ec8fdf5cea5e825_JaffaCakes118.exe	99
PID 4640 wrote to memory of 2980	4640	udxcutok.exe	106
PID 4640 wrote to memory of 2980	4640	udxcutok.exe	106
PID 4640 wrote to memory of 2980	4640	udxcutok.exe	106
PID 4640 wrote to memory of 2980	4640	udxcutok.exe	106
PID 4640 wrote to memory of 2980	4640	udxcutok.exe	106

C:\Users\Admin\AppData\Local\Temp\d00c99b9f288f44b0ec8fdf5cea5e825_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\d00c99b9f288f44b0ec8fdf5cea5e825_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3612
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hxhvwasd\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:5272
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\udxcutok.exe" C:\Windows\SysWOW64\hxhvwasd\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:5632
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create hxhvwasd binPath= "C:\Windows\SysWOW64\hxhvwasd\udxcutok.exe /d\"C:\Users\Admin\AppData\Local\Temp\d00c99b9f288f44b0ec8fdf5cea5e825_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3640
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description hxhvwasd "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:5432
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start hxhvwasd
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:6088
- 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:828
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3612 -s 1160
  2⤵
  - Program crash
  PID:5576

C:\Windows\SysWOW64\hxhvwasd\udxcutok.exe
C:\Windows\SysWOW64\hxhvwasd\udxcutok.exe /d"C:\Users\Admin\AppData\Local\Temp\d00c99b9f288f44b0ec8fdf5cea5e825_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4640
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2980
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4640 -s 508
  2⤵
  - Program crash
  PID:5472

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 3612 -ip 3612
1⤵
PID:2528

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 476 -p 4640 -ip 4640
1⤵
PID:4804

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\udxcutok.exe

Filesize
12.2MB

MD5
145c6a66532d0dced5870e24474f5ef6

SHA1
e76aa763e99bbd09b1bcf0f62f6b8c375fd2b00d

SHA256
556db1444b81575a09aa0eec17fd42a8c37f92295e4ce33b1d4f6e1b3d476b47

SHA512
69286357bcbebc738ee5243c1a4a2de25dca06ac41771e240ae556cb4e71216f4f074da9191ea3cea27e270e7cabacec371ec8c3bfe427e9265d6158195fe1eb

Download Submit
memory/2980-13-0x0000000000A50000-0x0000000000A65000-memory.dmp

Filesize
84KB

Download
memory/2980-17-0x0000000000A50000-0x0000000000A65000-memory.dmp

Filesize
84KB

Download
memory/2980-16-0x0000000000A50000-0x0000000000A65000-memory.dmp

Filesize
84KB

Download
memory/3612-8-0x0000000000630000-0x0000000000643000-memory.dmp

Filesize
76KB

Download
memory/3612-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3612-2-0x0000000000630000-0x0000000000643000-memory.dmp

Filesize
76KB

Download
memory/3612-7-0x0000000000400000-0x00000000004DD000-memory.dmp

Filesize
884KB

Download
memory/3612-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3612-1-0x0000000000730000-0x0000000000830000-memory.dmp

Filesize
1024KB

Download
memory/4640-12-0x0000000000400000-0x00000000004DD000-memory.dmp

Filesize
884KB

Download
memory/4640-15-0x0000000000400000-0x00000000004DD000-memory.dmp

Filesize
884KB

Download
memory/4640-11-0x0000000000400000-0x00000000004DD000-memory.dmp

Filesize
884KB

Download
memory/4640-19-0x0000000000400000-0x00000000004DD000-memory.dmp

Filesize
884KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads