tofsee | c6c06657dda6548688bc99410737e0ec5c39c172bdb50eefa6cd05b1352ea3d0

General

Target

JaffaCakes118_c6c06657dda6548688bc99410737e0ec5c39c172bdb50eefa6cd05b1352ea3d0.exe
Size

166KB
MD5

315de4a0db7d9b0d353dafa247fa65fb
SHA1

9f960397454775ecfad00fc7d2c2a1f70f3bd5ac
SHA256

c6c06657dda6548688bc99410737e0ec5c39c172bdb50eefa6cd05b1352ea3d0
SHA512

1ea4bc3c55d105ba76b6181350a1a3376491f8954ff3eac5ae69249b45558bed940a0646b274a59d2a2dc48f1e6878a849b7cfe95262430067e02bbd71e5b7fa
SSDEEP

1536:WkvcK8csDbh4DNXrtsokWJAntJioiGHA0vhyTEuEJT9AoLSI+xNZStnYa5OxfcGp:l6D4NZsPLrA0EEFF2ZN2Ya5OJcexDX

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
2300	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\rfrrabmi\ImagePath = "C:\\Windows\\SysWOW64\\rfrrabmi\\cwsyjtlr.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	JaffaCakes118_c6c06657dda6548688bc99410737e0ec5c39c172bdb50eefa6cd05b1352ea3d0.exe

Deletes itself 1 IoCs

pid	Process
4820	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3960	cwsyjtlr.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3960 set thread context of 4820	3960	cwsyjtlr.exe	100

Launches sc.exe 3 IoCs

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

pid	Process
5032	sc.exe
1288	sc.exe
848	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
5068	688	WerFault.exe	83
212	3960	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	JaffaCakes118_c6c06657dda6548688bc99410737e0ec5c39c172bdb50eefa6cd05b1352ea3d0.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	cwsyjtlr.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	netsh.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 688 wrote to memory of 1088	688	JaffaCakes118_c6c06657dda6548688bc99410737e0ec5c39c172bdb50eefa6cd05b1352ea3d0.exe	84
PID 688 wrote to memory of 1088	688	JaffaCakes118_c6c06657dda6548688bc99410737e0ec5c39c172bdb50eefa6cd05b1352ea3d0.exe	84
PID 688 wrote to memory of 1088	688	JaffaCakes118_c6c06657dda6548688bc99410737e0ec5c39c172bdb50eefa6cd05b1352ea3d0.exe	84
PID 688 wrote to memory of 972	688	JaffaCakes118_c6c06657dda6548688bc99410737e0ec5c39c172bdb50eefa6cd05b1352ea3d0.exe	86
PID 688 wrote to memory of 972	688	JaffaCakes118_c6c06657dda6548688bc99410737e0ec5c39c172bdb50eefa6cd05b1352ea3d0.exe	86
PID 688 wrote to memory of 972	688	JaffaCakes118_c6c06657dda6548688bc99410737e0ec5c39c172bdb50eefa6cd05b1352ea3d0.exe	86
PID 688 wrote to memory of 5032	688	JaffaCakes118_c6c06657dda6548688bc99410737e0ec5c39c172bdb50eefa6cd05b1352ea3d0.exe	88
PID 688 wrote to memory of 5032	688	JaffaCakes118_c6c06657dda6548688bc99410737e0ec5c39c172bdb50eefa6cd05b1352ea3d0.exe	88
PID 688 wrote to memory of 5032	688	JaffaCakes118_c6c06657dda6548688bc99410737e0ec5c39c172bdb50eefa6cd05b1352ea3d0.exe	88
PID 688 wrote to memory of 1288	688	JaffaCakes118_c6c06657dda6548688bc99410737e0ec5c39c172bdb50eefa6cd05b1352ea3d0.exe	90
PID 688 wrote to memory of 1288	688	JaffaCakes118_c6c06657dda6548688bc99410737e0ec5c39c172bdb50eefa6cd05b1352ea3d0.exe	90
PID 688 wrote to memory of 1288	688	JaffaCakes118_c6c06657dda6548688bc99410737e0ec5c39c172bdb50eefa6cd05b1352ea3d0.exe	90
PID 688 wrote to memory of 848	688	JaffaCakes118_c6c06657dda6548688bc99410737e0ec5c39c172bdb50eefa6cd05b1352ea3d0.exe	92
PID 688 wrote to memory of 848	688	JaffaCakes118_c6c06657dda6548688bc99410737e0ec5c39c172bdb50eefa6cd05b1352ea3d0.exe	92
PID 688 wrote to memory of 848	688	JaffaCakes118_c6c06657dda6548688bc99410737e0ec5c39c172bdb50eefa6cd05b1352ea3d0.exe	92
PID 688 wrote to memory of 2300	688	JaffaCakes118_c6c06657dda6548688bc99410737e0ec5c39c172bdb50eefa6cd05b1352ea3d0.exe	95
PID 688 wrote to memory of 2300	688	JaffaCakes118_c6c06657dda6548688bc99410737e0ec5c39c172bdb50eefa6cd05b1352ea3d0.exe	95
PID 688 wrote to memory of 2300	688	JaffaCakes118_c6c06657dda6548688bc99410737e0ec5c39c172bdb50eefa6cd05b1352ea3d0.exe	95
PID 3960 wrote to memory of 4820	3960	cwsyjtlr.exe	100
PID 3960 wrote to memory of 4820	3960	cwsyjtlr.exe	100
PID 3960 wrote to memory of 4820	3960	cwsyjtlr.exe	100
PID 3960 wrote to memory of 4820	3960	cwsyjtlr.exe	100
PID 3960 wrote to memory of 4820	3960	cwsyjtlr.exe	100

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_c6c06657dda6548688bc99410737e0ec5c39c172bdb50eefa6cd05b1352ea3d0.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_c6c06657dda6548688bc99410737e0ec5c39c172bdb50eefa6cd05b1352ea3d0.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:688
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rfrrabmi\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1088
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\cwsyjtlr.exe" C:\Windows\SysWOW64\rfrrabmi\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:972
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create rfrrabmi binPath= "C:\Windows\SysWOW64\rfrrabmi\cwsyjtlr.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_c6c06657dda6548688bc99410737e0ec5c39c172bdb50eefa6cd05b1352ea3d0.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:5032
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description rfrrabmi "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1288
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start rfrrabmi
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:848
- 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:2300
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 688 -s 1168
  2⤵
  - Program crash
  PID:5068

C:\Windows\SysWOW64\rfrrabmi\cwsyjtlr.exe
C:\Windows\SysWOW64\rfrrabmi\cwsyjtlr.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_c6c06657dda6548688bc99410737e0ec5c39c172bdb50eefa6cd05b1352ea3d0.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3960
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4820
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3960 -s 520
  2⤵
  - Program crash
  PID:212

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 688 -ip 688
1⤵
PID:4600

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 512 -p 3960 -ip 3960
1⤵
PID:1632

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\cwsyjtlr.exe

Filesize
11.1MB

MD5
6182450fb331904fa36fb16ae854e4d5

SHA1
430772ad7b4c3805a733df5ff7494fedfac7bf15

SHA256
4a76e26d52c53574b4c91cbafd0952c6c38be6929990b7ba2b4806fe168747fc

SHA512
74f4dba94c69fb6dfd59abb174b34f848ad342880217f3a119a6ce993eb75a4359cabf62bfb5c0b7b9c1cfb61bb92dde2479a6d0187adf6639d6f2e3eb4bdba3

Download Submit
memory/688-9-0x0000000000640000-0x0000000000653000-memory.dmp

Filesize
76KB

Download
memory/688-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/688-2-0x0000000000640000-0x0000000000653000-memory.dmp

Filesize
76KB

Download
memory/688-8-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/688-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/688-1-0x0000000000810000-0x0000000000910000-memory.dmp

Filesize
1024KB

Download
memory/3960-13-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/3960-12-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/3960-11-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/3960-18-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/4820-14-0x00000000009A0000-0x00000000009B5000-memory.dmp

Filesize
84KB

Download
memory/4820-16-0x00000000009A0000-0x00000000009B5000-memory.dmp

Filesize
84KB

Download
memory/4820-17-0x00000000009A0000-0x00000000009B5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads