tofsee | 38b1c41c5fefba7748d9c832b2f2ad6223a37f27afb3eb8b72f8d16bd30cbf13

General

Target

JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe
Size

13.9MB
MD5

1b5150200509334e86b497d0eb143cb0
SHA1

5ad9fc641d3c4c8a11aa8132b9e38b4a900015e1
SHA256

38b1c41c5fefba7748d9c832b2f2ad6223a37f27afb3eb8b72f8d16bd30cbf13
SHA512

18429d3d9f0c7070dbb10902a0d5d8547442d4358f2627f6247b3244b04850d652ee6766d88a1e6dfac4e908e8e9087157500d63be26b9020f884ea00b8b764c
SSDEEP

49152:2yzapZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZh:2C

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
3500	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\wumgysuk\ImagePath = "C:\\Windows\\SysWOW64\\wumgysuk\\uwqfbxtk.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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe

Deletes itself 1 IoCs

pid	Process
812	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3004	uwqfbxtk.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3004 set thread context of 812	3004	uwqfbxtk.exe	98

Launches sc.exe 3 IoCs

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

pid	Process
3164	sc.exe
1120	sc.exe
2324	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
2252	4120	WerFault.exe	81
4008	3004	WerFault.exe	92

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_1b5150200509334e86b497d0eb143cb0.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	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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	uwqfbxtk.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4120 wrote to memory of 392	4120	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	82
PID 4120 wrote to memory of 392	4120	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	82
PID 4120 wrote to memory of 392	4120	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	82
PID 4120 wrote to memory of 2948	4120	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	84
PID 4120 wrote to memory of 2948	4120	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	84
PID 4120 wrote to memory of 2948	4120	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	84
PID 4120 wrote to memory of 3164	4120	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	86
PID 4120 wrote to memory of 3164	4120	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	86
PID 4120 wrote to memory of 3164	4120	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	86
PID 4120 wrote to memory of 1120	4120	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	88
PID 4120 wrote to memory of 1120	4120	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	88
PID 4120 wrote to memory of 1120	4120	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	88
PID 4120 wrote to memory of 2324	4120	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	90
PID 4120 wrote to memory of 2324	4120	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	90
PID 4120 wrote to memory of 2324	4120	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	90
PID 4120 wrote to memory of 3500	4120	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	93
PID 4120 wrote to memory of 3500	4120	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	93
PID 4120 wrote to memory of 3500	4120	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	93
PID 3004 wrote to memory of 812	3004	uwqfbxtk.exe	98
PID 3004 wrote to memory of 812	3004	uwqfbxtk.exe	98
PID 3004 wrote to memory of 812	3004	uwqfbxtk.exe	98
PID 3004 wrote to memory of 812	3004	uwqfbxtk.exe	98
PID 3004 wrote to memory of 812	3004	uwqfbxtk.exe	98

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4120
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wumgysuk\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:392
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\uwqfbxtk.exe" C:\Windows\SysWOW64\wumgysuk\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2948
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create wumgysuk binPath= "C:\Windows\SysWOW64\wumgysuk\uwqfbxtk.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3164
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description wumgysuk "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1120
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start wumgysuk
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2324
- 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:3500
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4120 -s 1144
  2⤵
  - Program crash
  PID:2252

C:\Windows\SysWOW64\wumgysuk\uwqfbxtk.exe
C:\Windows\SysWOW64\wumgysuk\uwqfbxtk.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3004
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:812
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3004 -s 536
  2⤵
  - Program crash
  PID:4008

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 4120 -ip 4120
1⤵
PID:3496

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 552 -p 3004 -ip 3004
1⤵
PID:644

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\uwqfbxtk.exe

Filesize
10.2MB

MD5
e65d4b08f8ce41955fae89f9b9b2ca75

SHA1
b1afb9138e95582a5ae25a6f6cb2578bfb0cb9e9

SHA256
3b2b79337e98763b3f283820ce18928c5f17ae1277e5567937453b9436c60c48

SHA512
ba1982b057d29d5c1c2caa27a7493b571654289f31a806fbe58f180b4b1cd28668e05fccf823d08662a0fefe60921c51c19708dfbbab1075bb0f8659ef34addf

Download Submit
memory/812-11-0x0000000001270000-0x0000000001285000-memory.dmp

Filesize
84KB

Download
memory/812-16-0x0000000001270000-0x0000000001285000-memory.dmp

Filesize
84KB

Download
memory/812-13-0x0000000001270000-0x0000000001285000-memory.dmp

Filesize
84KB

Download
memory/3004-15-0x0000000000400000-0x00000000016BD000-memory.dmp

Filesize
18.7MB

Download
memory/3004-14-0x0000000000400000-0x00000000016BD000-memory.dmp

Filesize
18.7MB

Download
memory/3004-17-0x0000000000400000-0x00000000016BD000-memory.dmp

Filesize
18.7MB

Download
memory/4120-8-0x0000000000400000-0x00000000016BD000-memory.dmp

Filesize
18.7MB

Download
memory/4120-9-0x0000000001820000-0x0000000001833000-memory.dmp

Filesize
76KB

Download
memory/4120-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4120-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4120-1-0x00000000018B0000-0x00000000019B0000-memory.dmp

Filesize
1024KB

Download
memory/4120-2-0x0000000001820000-0x0000000001833000-memory.dmp

Filesize
76KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads