tofsee | e72446ec15432b1960fa9fe6a6e468a6461433daf3e6cac79ad953ce0d10c686

General

Target

f399ef025b4aad20f8d6bc1e3e23822d_JaffaCakes118.exe
Size

12.2MB
MD5

f399ef025b4aad20f8d6bc1e3e23822d
SHA1

225ca5bec26218e9b2ac60ff741c5aa8dabe243a
SHA256

e72446ec15432b1960fa9fe6a6e468a6461433daf3e6cac79ad953ce0d10c686
SHA512

d9b6fdc3207fccd6e55d037c2f0111ff07e4c03304e6b1095e2388a38c3c666e349c949d337d4bc222938cb87a0bbd69c1eac5bbb8509febc593d235cae38a33
SSDEEP

24576:DRQITb1qsssssssssssssssssssssssssssssssssssssssssssssssssssssssr:n

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
4396	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\bmxqvrfx\ImagePath = "C:\\Windows\\SysWOW64\\bmxqvrfx\\fdnllbka.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-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	f399ef025b4aad20f8d6bc1e3e23822d_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
2968	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1656	fdnllbka.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1656 set thread context of 2968	1656	fdnllbka.exe	101

Launches sc.exe 3 IoCs

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

pid	Process
1824	sc.exe
232	sc.exe
4032	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
3840	4796	WerFault.exe	82
696	1656	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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f399ef025b4aad20f8d6bc1e3e23822d_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fdnllbka.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4796 wrote to memory of 1004	4796	f399ef025b4aad20f8d6bc1e3e23822d_JaffaCakes118.exe	83
PID 4796 wrote to memory of 1004	4796	f399ef025b4aad20f8d6bc1e3e23822d_JaffaCakes118.exe	83
PID 4796 wrote to memory of 1004	4796	f399ef025b4aad20f8d6bc1e3e23822d_JaffaCakes118.exe	83
PID 4796 wrote to memory of 408	4796	f399ef025b4aad20f8d6bc1e3e23822d_JaffaCakes118.exe	85
PID 4796 wrote to memory of 408	4796	f399ef025b4aad20f8d6bc1e3e23822d_JaffaCakes118.exe	85
PID 4796 wrote to memory of 408	4796	f399ef025b4aad20f8d6bc1e3e23822d_JaffaCakes118.exe	85
PID 4796 wrote to memory of 1824	4796	f399ef025b4aad20f8d6bc1e3e23822d_JaffaCakes118.exe	87
PID 4796 wrote to memory of 1824	4796	f399ef025b4aad20f8d6bc1e3e23822d_JaffaCakes118.exe	87
PID 4796 wrote to memory of 1824	4796	f399ef025b4aad20f8d6bc1e3e23822d_JaffaCakes118.exe	87
PID 4796 wrote to memory of 232	4796	f399ef025b4aad20f8d6bc1e3e23822d_JaffaCakes118.exe	90
PID 4796 wrote to memory of 232	4796	f399ef025b4aad20f8d6bc1e3e23822d_JaffaCakes118.exe	90
PID 4796 wrote to memory of 232	4796	f399ef025b4aad20f8d6bc1e3e23822d_JaffaCakes118.exe	90
PID 4796 wrote to memory of 4032	4796	f399ef025b4aad20f8d6bc1e3e23822d_JaffaCakes118.exe	92
PID 4796 wrote to memory of 4032	4796	f399ef025b4aad20f8d6bc1e3e23822d_JaffaCakes118.exe	92
PID 4796 wrote to memory of 4032	4796	f399ef025b4aad20f8d6bc1e3e23822d_JaffaCakes118.exe	92
PID 4796 wrote to memory of 4396	4796	f399ef025b4aad20f8d6bc1e3e23822d_JaffaCakes118.exe	95
PID 4796 wrote to memory of 4396	4796	f399ef025b4aad20f8d6bc1e3e23822d_JaffaCakes118.exe	95
PID 4796 wrote to memory of 4396	4796	f399ef025b4aad20f8d6bc1e3e23822d_JaffaCakes118.exe	95
PID 1656 wrote to memory of 2968	1656	fdnllbka.exe	101
PID 1656 wrote to memory of 2968	1656	fdnllbka.exe	101
PID 1656 wrote to memory of 2968	1656	fdnllbka.exe	101
PID 1656 wrote to memory of 2968	1656	fdnllbka.exe	101
PID 1656 wrote to memory of 2968	1656	fdnllbka.exe	101

C:\Users\Admin\AppData\Local\Temp\f399ef025b4aad20f8d6bc1e3e23822d_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f399ef025b4aad20f8d6bc1e3e23822d_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4796
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bmxqvrfx\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1004
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\fdnllbka.exe" C:\Windows\SysWOW64\bmxqvrfx\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:408
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create bmxqvrfx binPath= "C:\Windows\SysWOW64\bmxqvrfx\fdnllbka.exe /d\"C:\Users\Admin\AppData\Local\Temp\f399ef025b4aad20f8d6bc1e3e23822d_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1824
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description bmxqvrfx "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:232
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start bmxqvrfx
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4032
- 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:4396
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4796 -s 1028
  2⤵
  - Program crash
  PID:3840

C:\Windows\SysWOW64\bmxqvrfx\fdnllbka.exe
C:\Windows\SysWOW64\bmxqvrfx\fdnllbka.exe /d"C:\Users\Admin\AppData\Local\Temp\f399ef025b4aad20f8d6bc1e3e23822d_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1656
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2968
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1656 -s 512
  2⤵
  - Program crash
  PID:696

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 4796 -ip 4796
1⤵
PID:1488

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 1656 -ip 1656
1⤵
PID:3220

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\fdnllbka.exe

Filesize
12.3MB

MD5
5352f2ba23b1fad6c3bc1d0f25e90987

SHA1
60f6c8f83cea3b5faa09d7edcc415b0e1b251409

SHA256
7728f62cc2f3b1e708be06fd9b944705c849d86b89b71fdf7acbc9475950c367

SHA512
40a6f7d0ae65ab0541497376b3076ed1ccc8955b8e8b4cdc803a71a73cf25d49bb5f4ece476574420f63d6b649abe27e00efa1a63e54c1f11323bba0352c1441

Download Submit
memory/1656-13-0x0000000000400000-0x0000000002B90000-memory.dmp

Filesize
39.6MB

Download
memory/2968-9-0x0000000000A30000-0x0000000000A45000-memory.dmp

Filesize
84KB

Download
memory/2968-14-0x0000000000A30000-0x0000000000A45000-memory.dmp

Filesize
84KB

Download
memory/2968-15-0x0000000000A30000-0x0000000000A45000-memory.dmp

Filesize
84KB

Download
memory/4796-1-0x0000000002E10000-0x0000000002F10000-memory.dmp

Filesize
1024KB

Download
memory/4796-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/4796-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4796-12-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4796-11-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/4796-8-0x0000000000400000-0x0000000002B90000-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