tofsee | 8f4455c865efb65d8ff1395429873ebadb7f52e44da1398fa8ea6ee3e9cc0457

General

Target

f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe
Size

10.4MB
MD5

f7337c874dc52cb9c05855846b4cc0c2
SHA1

557ea34cad7f5de0f875220ea32f1891392362ae
SHA256

8f4455c865efb65d8ff1395429873ebadb7f52e44da1398fa8ea6ee3e9cc0457
SHA512

783aae33663a4db32f88ea6321a696103ba060b0776436f0aebfeff00a2672fb049dab66594a3809f7fc794d15d7e451bffb0c77f2eb2c39038ce4f808fb07fd
SSDEEP

24576:DoGUbmtvDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD/:P9t

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
1988	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\aoncgogu\ImagePath = "C:\\Windows\\SysWOW64\\aoncgogu\\pwzxyyoc.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	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
4744	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4540	pwzxyyoc.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4540 set thread context of 4744	4540	pwzxyyoc.exe	100

Launches sc.exe 3 IoCs

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

pid	Process
3408	sc.exe
1576	sc.exe
3056	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
4424	4940	WerFault.exe	83
4548	4540	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	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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	pwzxyyoc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4940 wrote to memory of 1924	4940	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	84
PID 4940 wrote to memory of 1924	4940	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	84
PID 4940 wrote to memory of 1924	4940	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	84
PID 4940 wrote to memory of 1700	4940	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	86
PID 4940 wrote to memory of 1700	4940	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	86
PID 4940 wrote to memory of 1700	4940	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	86
PID 4940 wrote to memory of 3056	4940	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	88
PID 4940 wrote to memory of 3056	4940	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	88
PID 4940 wrote to memory of 3056	4940	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	88
PID 4940 wrote to memory of 3408	4940	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	90
PID 4940 wrote to memory of 3408	4940	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	90
PID 4940 wrote to memory of 3408	4940	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	90
PID 4940 wrote to memory of 1576	4940	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	92
PID 4940 wrote to memory of 1576	4940	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	92
PID 4940 wrote to memory of 1576	4940	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	92
PID 4940 wrote to memory of 1988	4940	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	95
PID 4940 wrote to memory of 1988	4940	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	95
PID 4940 wrote to memory of 1988	4940	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	95
PID 4540 wrote to memory of 4744	4540	pwzxyyoc.exe	100
PID 4540 wrote to memory of 4744	4540	pwzxyyoc.exe	100
PID 4540 wrote to memory of 4744	4540	pwzxyyoc.exe	100
PID 4540 wrote to memory of 4744	4540	pwzxyyoc.exe	100
PID 4540 wrote to memory of 4744	4540	pwzxyyoc.exe	100

C:\Users\Admin\AppData\Local\Temp\f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4940
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\aoncgogu\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1924
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pwzxyyoc.exe" C:\Windows\SysWOW64\aoncgogu\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1700
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create aoncgogu binPath= "C:\Windows\SysWOW64\aoncgogu\pwzxyyoc.exe /d\"C:\Users\Admin\AppData\Local\Temp\f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3056
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description aoncgogu "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3408
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start aoncgogu
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1576
- 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:1988
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4940 -s 1224
  2⤵
  - Program crash
  PID:4424

C:\Windows\SysWOW64\aoncgogu\pwzxyyoc.exe
C:\Windows\SysWOW64\aoncgogu\pwzxyyoc.exe /d"C:\Users\Admin\AppData\Local\Temp\f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4540
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4744
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4540 -s 512
  2⤵
  - Program crash
  PID:4548

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 4940 -ip 4940
1⤵
PID:4032

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 4540 -ip 4540
1⤵
PID:3128

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\pwzxyyoc.exe

Filesize
14.0MB

MD5
1739a9659379fc8b717d6a068b06e120

SHA1
f1368cc956b1455e09ee2421728de3bf81e2da91

SHA256
5a8ffa3ff09aac3ba821d08f953fc91c458d55dc886f86720453b5441381f230

SHA512
59abe37acc13add749fa0f6cf8572322dfbe985a57201d847ae0637c942a75fd758e072c5f3c125f01513fbdb316c8657d1fef7c1bba7a59579f38cfa623ec71

Download Submit
memory/4540-13-0x0000000000400000-0x0000000002B8F000-memory.dmp

Filesize
39.6MB

Download
memory/4744-8-0x0000000000A00000-0x0000000000A15000-memory.dmp

Filesize
84KB

Download
memory/4744-14-0x0000000000A00000-0x0000000000A15000-memory.dmp

Filesize
84KB

Download
memory/4744-15-0x0000000000A00000-0x0000000000A15000-memory.dmp

Filesize
84KB

Download
memory/4940-1-0x0000000002CB0000-0x0000000002DB0000-memory.dmp

Filesize
1024KB

Download
memory/4940-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/4940-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4940-12-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4940-11-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/4940-10-0x0000000000400000-0x0000000002B8F000-memory.dmp

Filesize
39.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads