tofsee | bd89ba4c450170d048d096197120db63d957a84bf4071a6e2a574a66abfb9dfe

General

Target

67603f228bce87b17b5f18d57e9ed789_JaffaCakes118.exe
Size

12.0MB
MD5

67603f228bce87b17b5f18d57e9ed789
SHA1

1487565bd34d8e478af5dfc3522476323e2a17ea
SHA256

bd89ba4c450170d048d096197120db63d957a84bf4071a6e2a574a66abfb9dfe
SHA512

2e5505c9918e6cee80e5ff706a94e722611006216012952fd513ff24a85997c2584e1996cd8ee1c70bc23133f94b08a867de17de8f25e7ac98659c59f5c466d8
SSDEEP

12288:2b22XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX:C2

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
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

Processes:

netsh.exe

pid process

1016 netsh.exe

pid	process
1016	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\fruxpssc\ImagePath = "C:\\Windows\\SysWOW64\\fruxpssc\\bexfdfnx.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

Processes:

67603f228bce87b17b5f18d57e9ed789_JaffaCakes118.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	67603f228bce87b17b5f18d57e9ed789_JaffaCakes118.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

972 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

bexfdfnx.exe

pid process

1492 bexfdfnx.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

bexfdfnx.exe

description pid process target process

PID 1492 set thread context of 972 1492 bexfdfnx.exe svchost.exe
Launches sc.exe 3 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exesc.exesc.exe

pid process

1680 sc.exe
4452 sc.exe
2744 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
972	svchost.exe

pid	process
1492	bexfdfnx.exe

description	pid	process	target process
PID 1492 set thread context of 972	1492	bexfdfnx.exe	svchost.exe

pid	process
1680	sc.exe
4452	sc.exe
2744	sc.exe

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

Processes:

netsh.exe

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

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

Processes:

cmd.exenetsh.exebexfdfnx.exe67603f228bce87b17b5f18d57e9ed789_JaffaCakes118.exesc.exesc.exesc.exesvchost.execmd.exe

description	ioc	process
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	bexfdfnx.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	67603f228bce87b17b5f18d57e9ed789_JaffaCakes118.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

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

67603f228bce87b17b5f18d57e9ed789_JaffaCakes118.exebexfdfnx.exe

description	pid	process	target process
PID 4568 wrote to memory of 1460	4568	67603f228bce87b17b5f18d57e9ed789_JaffaCakes118.exe	cmd.exe
PID 4568 wrote to memory of 1460	4568	67603f228bce87b17b5f18d57e9ed789_JaffaCakes118.exe	cmd.exe
PID 4568 wrote to memory of 1460	4568	67603f228bce87b17b5f18d57e9ed789_JaffaCakes118.exe	cmd.exe
PID 4568 wrote to memory of 3828	4568	67603f228bce87b17b5f18d57e9ed789_JaffaCakes118.exe	cmd.exe
PID 4568 wrote to memory of 3828	4568	67603f228bce87b17b5f18d57e9ed789_JaffaCakes118.exe	cmd.exe
PID 4568 wrote to memory of 3828	4568	67603f228bce87b17b5f18d57e9ed789_JaffaCakes118.exe	cmd.exe
PID 4568 wrote to memory of 1680	4568	67603f228bce87b17b5f18d57e9ed789_JaffaCakes118.exe	sc.exe
PID 4568 wrote to memory of 1680	4568	67603f228bce87b17b5f18d57e9ed789_JaffaCakes118.exe	sc.exe
PID 4568 wrote to memory of 1680	4568	67603f228bce87b17b5f18d57e9ed789_JaffaCakes118.exe	sc.exe
PID 4568 wrote to memory of 4452	4568	67603f228bce87b17b5f18d57e9ed789_JaffaCakes118.exe	sc.exe
PID 4568 wrote to memory of 4452	4568	67603f228bce87b17b5f18d57e9ed789_JaffaCakes118.exe	sc.exe
PID 4568 wrote to memory of 4452	4568	67603f228bce87b17b5f18d57e9ed789_JaffaCakes118.exe	sc.exe
PID 4568 wrote to memory of 2744	4568	67603f228bce87b17b5f18d57e9ed789_JaffaCakes118.exe	sc.exe
PID 4568 wrote to memory of 2744	4568	67603f228bce87b17b5f18d57e9ed789_JaffaCakes118.exe	sc.exe
PID 4568 wrote to memory of 2744	4568	67603f228bce87b17b5f18d57e9ed789_JaffaCakes118.exe	sc.exe
PID 4568 wrote to memory of 1016	4568	67603f228bce87b17b5f18d57e9ed789_JaffaCakes118.exe	netsh.exe
PID 4568 wrote to memory of 1016	4568	67603f228bce87b17b5f18d57e9ed789_JaffaCakes118.exe	netsh.exe
PID 4568 wrote to memory of 1016	4568	67603f228bce87b17b5f18d57e9ed789_JaffaCakes118.exe	netsh.exe
PID 1492 wrote to memory of 972	1492	bexfdfnx.exe	svchost.exe
PID 1492 wrote to memory of 972	1492	bexfdfnx.exe	svchost.exe
PID 1492 wrote to memory of 972	1492	bexfdfnx.exe	svchost.exe
PID 1492 wrote to memory of 972	1492	bexfdfnx.exe	svchost.exe
PID 1492 wrote to memory of 972	1492	bexfdfnx.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\67603f228bce87b17b5f18d57e9ed789_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\67603f228bce87b17b5f18d57e9ed789_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4568
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\fruxpssc\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1460
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bexfdfnx.exe" C:\Windows\SysWOW64\fruxpssc\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3828
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create fruxpssc binPath= "C:\Windows\SysWOW64\fruxpssc\bexfdfnx.exe /d\"C:\Users\Admin\AppData\Local\Temp\67603f228bce87b17b5f18d57e9ed789_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1680
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description fruxpssc "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4452
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start fruxpssc
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2744
- 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:1016

C:\Windows\SysWOW64\fruxpssc\bexfdfnx.exe
C:\Windows\SysWOW64\fruxpssc\bexfdfnx.exe /d"C:\Users\Admin\AppData\Local\Temp\67603f228bce87b17b5f18d57e9ed789_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1492
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:972

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\bexfdfnx.exe

Filesize
11.3MB

MD5
7e3efbc95ecf6475355e50206993e138

SHA1
3b95ba33dcf679f6443ba51841c9325566d3701e

SHA256
55550f0cfde690816d39d4c899837dee75fd7dce5f07e8f445a75d6ced01ccb9

SHA512
017a10ddf000f44c0dcf75e00be9869e995cd844da94269f697e5a91bab7716cfe384f61b7aa5f837774eb4375332424ea371a9369bbc9b5535a036d2823e093

Download Submit
memory/972-13-0x0000000000C00000-0x0000000000C15000-memory.dmp

Filesize
84KB

Download
memory/972-18-0x0000000000C00000-0x0000000000C15000-memory.dmp

Filesize
84KB

Download
memory/972-17-0x0000000000C00000-0x0000000000C15000-memory.dmp

Filesize
84KB

Download
memory/1492-11-0x0000000000400000-0x00000000004A9000-memory.dmp

Filesize
676KB

Download
memory/1492-12-0x0000000000400000-0x00000000004A9000-memory.dmp

Filesize
676KB

Download
memory/1492-15-0x0000000000400000-0x00000000004A9000-memory.dmp

Filesize
676KB

Download
memory/4568-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4568-2-0x00000000021F0000-0x0000000002203000-memory.dmp

Filesize
76KB

Download
memory/4568-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4568-9-0x00000000021F0000-0x0000000002203000-memory.dmp

Filesize
76KB

Download
memory/4568-8-0x0000000000400000-0x00000000004A9000-memory.dmp

Filesize
676KB

Download
memory/4568-1-0x0000000000580000-0x0000000000680000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads