tofsee | dfb026acc3b422e65c75bc4d105d8f383e97fa0990b5631123e47ff9b7abb08f

General

Target

JaffaCakes118_dfb026acc3b422e65c75bc4d105d8f383e97fa0990b5631123e47ff9b7abb08f.exe
Size

287KB
MD5

df10072c1fc4a8e3b0544afa68a86296
SHA1

77b06d7aae6a21ba7e3b5a668f252108276e8f77
SHA256

dfb026acc3b422e65c75bc4d105d8f383e97fa0990b5631123e47ff9b7abb08f
SHA512

cf54a8c9c40934091c05bd5d01f07db90525497fad403b966d5a5b36e6218292734bb3c894c30d263893e68baf9974d3e29458a5a9d5368c9a55e3c26294c34b
SSDEEP

3072:EcJFj9Ec2xTndjpPsEluBFWP3Dlu0ay/MCZryAGs4AB37NryJvMT8RROhSm4+lXU:DbjPwndjpxlubC3TKTs4AqCTYMI2K

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
400	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\rxgbevmg\ImagePath = "C:\\Windows\\SysWOW64\\rxgbevmg\\tayjojxl.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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	JaffaCakes118_dfb026acc3b422e65c75bc4d105d8f383e97fa0990b5631123e47ff9b7abb08f.exe

Deletes itself 1 IoCs

pid	Process
4688	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2220	tayjojxl.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2220 set thread context of 4688	2220	tayjojxl.exe	102

Launches sc.exe 3 IoCs

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

pid	Process
808	sc.exe
5052	sc.exe
620	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 queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
3972	2304	WerFault.exe	83
2960	2220	WerFault.exe	95

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_dfb026acc3b422e65c75bc4d105d8f383e97fa0990b5631123e47ff9b7abb08f.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	tayjojxl.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	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2304 wrote to memory of 1036	2304	JaffaCakes118_dfb026acc3b422e65c75bc4d105d8f383e97fa0990b5631123e47ff9b7abb08f.exe	84
PID 2304 wrote to memory of 1036	2304	JaffaCakes118_dfb026acc3b422e65c75bc4d105d8f383e97fa0990b5631123e47ff9b7abb08f.exe	84
PID 2304 wrote to memory of 1036	2304	JaffaCakes118_dfb026acc3b422e65c75bc4d105d8f383e97fa0990b5631123e47ff9b7abb08f.exe	84
PID 2304 wrote to memory of 3364	2304	JaffaCakes118_dfb026acc3b422e65c75bc4d105d8f383e97fa0990b5631123e47ff9b7abb08f.exe	86
PID 2304 wrote to memory of 3364	2304	JaffaCakes118_dfb026acc3b422e65c75bc4d105d8f383e97fa0990b5631123e47ff9b7abb08f.exe	86
PID 2304 wrote to memory of 3364	2304	JaffaCakes118_dfb026acc3b422e65c75bc4d105d8f383e97fa0990b5631123e47ff9b7abb08f.exe	86
PID 2304 wrote to memory of 808	2304	JaffaCakes118_dfb026acc3b422e65c75bc4d105d8f383e97fa0990b5631123e47ff9b7abb08f.exe	88
PID 2304 wrote to memory of 808	2304	JaffaCakes118_dfb026acc3b422e65c75bc4d105d8f383e97fa0990b5631123e47ff9b7abb08f.exe	88
PID 2304 wrote to memory of 808	2304	JaffaCakes118_dfb026acc3b422e65c75bc4d105d8f383e97fa0990b5631123e47ff9b7abb08f.exe	88
PID 2304 wrote to memory of 5052	2304	JaffaCakes118_dfb026acc3b422e65c75bc4d105d8f383e97fa0990b5631123e47ff9b7abb08f.exe	91
PID 2304 wrote to memory of 5052	2304	JaffaCakes118_dfb026acc3b422e65c75bc4d105d8f383e97fa0990b5631123e47ff9b7abb08f.exe	91
PID 2304 wrote to memory of 5052	2304	JaffaCakes118_dfb026acc3b422e65c75bc4d105d8f383e97fa0990b5631123e47ff9b7abb08f.exe	91
PID 2304 wrote to memory of 620	2304	JaffaCakes118_dfb026acc3b422e65c75bc4d105d8f383e97fa0990b5631123e47ff9b7abb08f.exe	93
PID 2304 wrote to memory of 620	2304	JaffaCakes118_dfb026acc3b422e65c75bc4d105d8f383e97fa0990b5631123e47ff9b7abb08f.exe	93
PID 2304 wrote to memory of 620	2304	JaffaCakes118_dfb026acc3b422e65c75bc4d105d8f383e97fa0990b5631123e47ff9b7abb08f.exe	93
PID 2304 wrote to memory of 400	2304	JaffaCakes118_dfb026acc3b422e65c75bc4d105d8f383e97fa0990b5631123e47ff9b7abb08f.exe	96
PID 2304 wrote to memory of 400	2304	JaffaCakes118_dfb026acc3b422e65c75bc4d105d8f383e97fa0990b5631123e47ff9b7abb08f.exe	96
PID 2304 wrote to memory of 400	2304	JaffaCakes118_dfb026acc3b422e65c75bc4d105d8f383e97fa0990b5631123e47ff9b7abb08f.exe	96
PID 2220 wrote to memory of 4688	2220	tayjojxl.exe	102
PID 2220 wrote to memory of 4688	2220	tayjojxl.exe	102
PID 2220 wrote to memory of 4688	2220	tayjojxl.exe	102
PID 2220 wrote to memory of 4688	2220	tayjojxl.exe	102
PID 2220 wrote to memory of 4688	2220	tayjojxl.exe	102

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_dfb026acc3b422e65c75bc4d105d8f383e97fa0990b5631123e47ff9b7abb08f.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_dfb026acc3b422e65c75bc4d105d8f383e97fa0990b5631123e47ff9b7abb08f.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2304
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rxgbevmg\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1036
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\tayjojxl.exe" C:\Windows\SysWOW64\rxgbevmg\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3364
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create rxgbevmg binPath= "C:\Windows\SysWOW64\rxgbevmg\tayjojxl.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_dfb026acc3b422e65c75bc4d105d8f383e97fa0990b5631123e47ff9b7abb08f.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:808
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description rxgbevmg "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:5052
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start rxgbevmg
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:620
- 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:400
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2304 -s 1236
  2⤵
  - Program crash
  PID:3972

C:\Windows\SysWOW64\rxgbevmg\tayjojxl.exe
C:\Windows\SysWOW64\rxgbevmg\tayjojxl.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_dfb026acc3b422e65c75bc4d105d8f383e97fa0990b5631123e47ff9b7abb08f.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2220
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4688
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2220 -s 516
  2⤵
  - Program crash
  PID:2960

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 2304 -ip 2304
1⤵
PID:1600

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 2220 -ip 2220
1⤵
PID:208

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\tayjojxl.exe

Filesize
12.0MB

MD5
1dd171c3c03fad5036cd6b6aa99ba419

SHA1
54c970817011c0112130ba5a48ab44dcb53b7330

SHA256
6fe6edbccd5744f14f8fae934d22947275864ba2ddc60755b69cd7bb294ff571

SHA512
bd49452cf80ea615542158967a045de8862da9b2047696b8589bf7ae9a491fe74188f4daa9bd3218b6712da143b2687c911560eb1471f8a2c99703064b74610c

Download Submit
memory/2220-15-0x0000000000400000-0x0000000002B91000-memory.dmp

Filesize
39.6MB

Download
memory/2304-1-0x0000000002D00000-0x0000000002E00000-memory.dmp

Filesize
1024KB

Download
memory/2304-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/2304-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2304-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2304-9-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/2304-8-0x0000000000400000-0x0000000002B91000-memory.dmp

Filesize
39.6MB

Download
memory/4688-11-0x00000000009C0000-0x00000000009D5000-memory.dmp

Filesize
84KB

Download
memory/4688-13-0x00000000009C0000-0x00000000009D5000-memory.dmp

Filesize
84KB

Download
memory/4688-14-0x00000000009C0000-0x00000000009D5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads