tofsee | c837cd078824befc2f5bcd696d0b7eece7c6ef2b706bc5332d5b1155aac06531

General

Target

JaffaCakes118_c837cd078824befc2f5bcd696d0b7eece7c6ef2b706bc5332d5b1155aac06531.exe
Size

270KB
MD5

4572e49963d2e5a2f834c3f66647c313
SHA1

5133ea013005b1867d964c1c7b68ae9919c11a60
SHA256

c837cd078824befc2f5bcd696d0b7eece7c6ef2b706bc5332d5b1155aac06531
SHA512

f200d03c74068ef8afdb4d69b8e145806c4dcab3c46ebef9f101ee4cf15faafde8107d302033e71ec785e21e47c9a407f68d89bc3aefdd8135ac02e6150c4d38
SSDEEP

6144:VlKUqyUmgpzhSMzmZqIPFphSn0zl19pDJH:fwyUmyAKn0B19b

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
3468	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\bsxtlday\ImagePath = "C:\\Windows\\SysWOW64\\bsxtlday\\jylhtslx.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-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	JaffaCakes118_c837cd078824befc2f5bcd696d0b7eece7c6ef2b706bc5332d5b1155aac06531.exe

Deletes itself 1 IoCs

pid	Process
1736	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2744	jylhtslx.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2744 set thread context of 1736	2744	jylhtslx.exe	101

Launches sc.exe 3 IoCs

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

pid	Process
5044	sc.exe
764	sc.exe
2228	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 value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
880	3236	WerFault.exe	82
4384	2744	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	jylhtslx.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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_c837cd078824befc2f5bcd696d0b7eece7c6ef2b706bc5332d5b1155aac06531.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3236 wrote to memory of 2928	3236	JaffaCakes118_c837cd078824befc2f5bcd696d0b7eece7c6ef2b706bc5332d5b1155aac06531.exe	83
PID 3236 wrote to memory of 2928	3236	JaffaCakes118_c837cd078824befc2f5bcd696d0b7eece7c6ef2b706bc5332d5b1155aac06531.exe	83
PID 3236 wrote to memory of 2928	3236	JaffaCakes118_c837cd078824befc2f5bcd696d0b7eece7c6ef2b706bc5332d5b1155aac06531.exe	83
PID 3236 wrote to memory of 1984	3236	JaffaCakes118_c837cd078824befc2f5bcd696d0b7eece7c6ef2b706bc5332d5b1155aac06531.exe	86
PID 3236 wrote to memory of 1984	3236	JaffaCakes118_c837cd078824befc2f5bcd696d0b7eece7c6ef2b706bc5332d5b1155aac06531.exe	86
PID 3236 wrote to memory of 1984	3236	JaffaCakes118_c837cd078824befc2f5bcd696d0b7eece7c6ef2b706bc5332d5b1155aac06531.exe	86
PID 3236 wrote to memory of 5044	3236	JaffaCakes118_c837cd078824befc2f5bcd696d0b7eece7c6ef2b706bc5332d5b1155aac06531.exe	88
PID 3236 wrote to memory of 5044	3236	JaffaCakes118_c837cd078824befc2f5bcd696d0b7eece7c6ef2b706bc5332d5b1155aac06531.exe	88
PID 3236 wrote to memory of 5044	3236	JaffaCakes118_c837cd078824befc2f5bcd696d0b7eece7c6ef2b706bc5332d5b1155aac06531.exe	88
PID 3236 wrote to memory of 764	3236	JaffaCakes118_c837cd078824befc2f5bcd696d0b7eece7c6ef2b706bc5332d5b1155aac06531.exe	90
PID 3236 wrote to memory of 764	3236	JaffaCakes118_c837cd078824befc2f5bcd696d0b7eece7c6ef2b706bc5332d5b1155aac06531.exe	90
PID 3236 wrote to memory of 764	3236	JaffaCakes118_c837cd078824befc2f5bcd696d0b7eece7c6ef2b706bc5332d5b1155aac06531.exe	90
PID 3236 wrote to memory of 2228	3236	JaffaCakes118_c837cd078824befc2f5bcd696d0b7eece7c6ef2b706bc5332d5b1155aac06531.exe	92
PID 3236 wrote to memory of 2228	3236	JaffaCakes118_c837cd078824befc2f5bcd696d0b7eece7c6ef2b706bc5332d5b1155aac06531.exe	92
PID 3236 wrote to memory of 2228	3236	JaffaCakes118_c837cd078824befc2f5bcd696d0b7eece7c6ef2b706bc5332d5b1155aac06531.exe	92
PID 3236 wrote to memory of 3468	3236	JaffaCakes118_c837cd078824befc2f5bcd696d0b7eece7c6ef2b706bc5332d5b1155aac06531.exe	95
PID 3236 wrote to memory of 3468	3236	JaffaCakes118_c837cd078824befc2f5bcd696d0b7eece7c6ef2b706bc5332d5b1155aac06531.exe	95
PID 3236 wrote to memory of 3468	3236	JaffaCakes118_c837cd078824befc2f5bcd696d0b7eece7c6ef2b706bc5332d5b1155aac06531.exe	95
PID 2744 wrote to memory of 1736	2744	jylhtslx.exe	101
PID 2744 wrote to memory of 1736	2744	jylhtslx.exe	101
PID 2744 wrote to memory of 1736	2744	jylhtslx.exe	101
PID 2744 wrote to memory of 1736	2744	jylhtslx.exe	101
PID 2744 wrote to memory of 1736	2744	jylhtslx.exe	101

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_c837cd078824befc2f5bcd696d0b7eece7c6ef2b706bc5332d5b1155aac06531.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_c837cd078824befc2f5bcd696d0b7eece7c6ef2b706bc5332d5b1155aac06531.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3236
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bsxtlday\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2928
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jylhtslx.exe" C:\Windows\SysWOW64\bsxtlday\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1984
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create bsxtlday binPath= "C:\Windows\SysWOW64\bsxtlday\jylhtslx.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_c837cd078824befc2f5bcd696d0b7eece7c6ef2b706bc5332d5b1155aac06531.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:5044
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description bsxtlday "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:764
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start bsxtlday
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2228
- 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:3468
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3236 -s 1040
  2⤵
  - Program crash
  PID:880

C:\Windows\SysWOW64\bsxtlday\jylhtslx.exe
C:\Windows\SysWOW64\bsxtlday\jylhtslx.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_c837cd078824befc2f5bcd696d0b7eece7c6ef2b706bc5332d5b1155aac06531.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2744
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1736
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2744 -s 508
  2⤵
  - Program crash
  PID:4384

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3236 -ip 3236
1⤵
PID:1052

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 2744 -ip 2744
1⤵
PID:1448

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\jylhtslx.exe

Filesize
14.1MB

MD5
f5e852beb25143e53b9217ae502e9cce

SHA1
ea1e9db03617f9961113e90282b81a15eb0444a2

SHA256
67ba5953abbaebd91b87381b02a64d413a668ccdff02036dbbc77365a0ad095c

SHA512
f1b0f0b27ee3459fe3b3f9bf883f5800c0792bf79f865b4295199aa796730008c2abfb7a7bd52472d47069c606a26fe4b4d46dc676bd14c7876cd744c1d1ae2d

Download Submit
memory/1736-14-0x0000000000450000-0x0000000000465000-memory.dmp

Filesize
84KB

Download
memory/1736-17-0x0000000000450000-0x0000000000465000-memory.dmp

Filesize
84KB

Download
memory/1736-16-0x0000000000450000-0x0000000000465000-memory.dmp

Filesize
84KB

Download
memory/2744-13-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/2744-12-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/2744-11-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/2744-18-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/3236-9-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/3236-8-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/3236-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/3236-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3236-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3236-1-0x00000000005F0000-0x00000000006F0000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads