tofsee | 36a91e9e960776f49ee5bc32abe2c39e57e1bf4f6d20d7c1c3dc29ee26cca7c9

General

Target

b1e9e8aa6e9fb7e6eecc2ff67a5c3a49_JaffaCakes118.exe
Size

14.4MB
MD5

b1e9e8aa6e9fb7e6eecc2ff67a5c3a49
SHA1

6dcb58533fbb4e8e70161fe38459670504daaf59
SHA256

36a91e9e960776f49ee5bc32abe2c39e57e1bf4f6d20d7c1c3dc29ee26cca7c9
SHA512

94e0e4ab1b541d92cbce3f82addc732c49f13add925840edb410a0bd7e28fbba0e706283a9c69e4938c8e71aa40f61316d2d3acdc5b5ef34daab92e34afbc7d1
SSDEEP

49152:R66666666666666666666666666666666666666666666666666666666666666m:

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.6

lazystax.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
3820	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\fxjzatfu\ImagePath = "C:\\Windows\\SysWOW64\\fxjzatfu\\rsuvpsnf.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-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	b1e9e8aa6e9fb7e6eecc2ff67a5c3a49_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
2892	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1848	rsuvpsnf.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1848 set thread context of 2892	1848	rsuvpsnf.exe	100

Launches sc.exe 3 IoCs

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

pid	Process
2028	sc.exe
5004	sc.exe
1352	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
1448	2452	WerFault.exe	83
1992	1848	WerFault.exe	94

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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b1e9e8aa6e9fb7e6eecc2ff67a5c3a49_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	svchost.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	rsuvpsnf.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2452 wrote to memory of 3364	2452	b1e9e8aa6e9fb7e6eecc2ff67a5c3a49_JaffaCakes118.exe	84
PID 2452 wrote to memory of 3364	2452	b1e9e8aa6e9fb7e6eecc2ff67a5c3a49_JaffaCakes118.exe	84
PID 2452 wrote to memory of 3364	2452	b1e9e8aa6e9fb7e6eecc2ff67a5c3a49_JaffaCakes118.exe	84
PID 2452 wrote to memory of 5108	2452	b1e9e8aa6e9fb7e6eecc2ff67a5c3a49_JaffaCakes118.exe	86
PID 2452 wrote to memory of 5108	2452	b1e9e8aa6e9fb7e6eecc2ff67a5c3a49_JaffaCakes118.exe	86
PID 2452 wrote to memory of 5108	2452	b1e9e8aa6e9fb7e6eecc2ff67a5c3a49_JaffaCakes118.exe	86
PID 2452 wrote to memory of 1352	2452	b1e9e8aa6e9fb7e6eecc2ff67a5c3a49_JaffaCakes118.exe	88
PID 2452 wrote to memory of 1352	2452	b1e9e8aa6e9fb7e6eecc2ff67a5c3a49_JaffaCakes118.exe	88
PID 2452 wrote to memory of 1352	2452	b1e9e8aa6e9fb7e6eecc2ff67a5c3a49_JaffaCakes118.exe	88
PID 2452 wrote to memory of 2028	2452	b1e9e8aa6e9fb7e6eecc2ff67a5c3a49_JaffaCakes118.exe	90
PID 2452 wrote to memory of 2028	2452	b1e9e8aa6e9fb7e6eecc2ff67a5c3a49_JaffaCakes118.exe	90
PID 2452 wrote to memory of 2028	2452	b1e9e8aa6e9fb7e6eecc2ff67a5c3a49_JaffaCakes118.exe	90
PID 2452 wrote to memory of 5004	2452	b1e9e8aa6e9fb7e6eecc2ff67a5c3a49_JaffaCakes118.exe	92
PID 2452 wrote to memory of 5004	2452	b1e9e8aa6e9fb7e6eecc2ff67a5c3a49_JaffaCakes118.exe	92
PID 2452 wrote to memory of 5004	2452	b1e9e8aa6e9fb7e6eecc2ff67a5c3a49_JaffaCakes118.exe	92
PID 2452 wrote to memory of 3820	2452	b1e9e8aa6e9fb7e6eecc2ff67a5c3a49_JaffaCakes118.exe	95
PID 2452 wrote to memory of 3820	2452	b1e9e8aa6e9fb7e6eecc2ff67a5c3a49_JaffaCakes118.exe	95
PID 2452 wrote to memory of 3820	2452	b1e9e8aa6e9fb7e6eecc2ff67a5c3a49_JaffaCakes118.exe	95
PID 1848 wrote to memory of 2892	1848	rsuvpsnf.exe	100
PID 1848 wrote to memory of 2892	1848	rsuvpsnf.exe	100
PID 1848 wrote to memory of 2892	1848	rsuvpsnf.exe	100
PID 1848 wrote to memory of 2892	1848	rsuvpsnf.exe	100
PID 1848 wrote to memory of 2892	1848	rsuvpsnf.exe	100

C:\Users\Admin\AppData\Local\Temp\b1e9e8aa6e9fb7e6eecc2ff67a5c3a49_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\b1e9e8aa6e9fb7e6eecc2ff67a5c3a49_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2452
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\fxjzatfu\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3364
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rsuvpsnf.exe" C:\Windows\SysWOW64\fxjzatfu\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:5108
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create fxjzatfu binPath= "C:\Windows\SysWOW64\fxjzatfu\rsuvpsnf.exe /d\"C:\Users\Admin\AppData\Local\Temp\b1e9e8aa6e9fb7e6eecc2ff67a5c3a49_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1352
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description fxjzatfu "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2028
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start fxjzatfu
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:5004
- 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:3820
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2452 -s 672
  2⤵
  - Program crash
  PID:1448

C:\Windows\SysWOW64\fxjzatfu\rsuvpsnf.exe
C:\Windows\SysWOW64\fxjzatfu\rsuvpsnf.exe /d"C:\Users\Admin\AppData\Local\Temp\b1e9e8aa6e9fb7e6eecc2ff67a5c3a49_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1848
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2892
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1848 -s 512
  2⤵
  - Program crash
  PID:1992

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 2452 -ip 2452
1⤵
PID:2472

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1848 -ip 1848
1⤵
PID:3584

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\rsuvpsnf.exe

Filesize
11.6MB

MD5
07a6c7e08d6a6f0acc0ba386a0591263

SHA1
4455d8bb4cc6c212611afc15091f4be201985d6a

SHA256
60b6bc6d06d72214a314ef8af648bb7208d6f76788af93433aea67a06b0d2fc0

SHA512
e775f90786334ea525916b1cd8bc35555949ef8a906d0e1be0852a36a0911b10a6121607ef6ac435838fc9683473a4e8b18d77eb7bbecabf45cf03f39ec15142

Download Submit
memory/1848-15-0x0000000000400000-0x0000000000C0A000-memory.dmp

Filesize
8.0MB

Download
memory/2452-1-0x0000000000E50000-0x0000000000F50000-memory.dmp

Filesize
1024KB

Download
memory/2452-2-0x0000000002950000-0x0000000002963000-memory.dmp

Filesize
76KB

Download
memory/2452-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2452-7-0x0000000000400000-0x0000000000C0A000-memory.dmp

Filesize
8.0MB

Download
memory/2452-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2452-8-0x0000000002950000-0x0000000002963000-memory.dmp

Filesize
76KB

Download
memory/2892-11-0x0000000000560000-0x0000000000575000-memory.dmp

Filesize
84KB

Download
memory/2892-13-0x0000000000560000-0x0000000000575000-memory.dmp

Filesize
84KB

Download
memory/2892-14-0x0000000000560000-0x0000000000575000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads