tofsee | 5bca9de0eabcbd74c4f04427a643fa084671b8260b90e7309f41a30c5f145b95

General

Target

JaffaCakes118_5bca9de0eabcbd74c4f04427a643fa084671b8260b90e7309f41a30c5f145b95.exe
Size

254KB
MD5

9d849c8ca21b5adea5bcf3f673b74517
SHA1

728ddd3fad37b744a26621e3bcae9f65cc743c9d
SHA256

5bca9de0eabcbd74c4f04427a643fa084671b8260b90e7309f41a30c5f145b95
SHA512

453761d3d8486e1f406db3700f60a469b8b5855b16cc52923bb59f22901a414b305a6cfacfd5abcba802e53376c63f568cbf61f364ff7c4d05ba17184f04e674
SSDEEP

6144:XvcjRGQr7zfreXSM7h0V9beG5k+zbZ0rpPRxN+JxU:XUVPr7zfCXfe9bOQbZspPRPq

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
3872	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\yrnptgjt\ImagePath = "C:\\Windows\\SysWOW64\\yrnptgjt\\gsztyerz.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-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	JaffaCakes118_5bca9de0eabcbd74c4f04427a643fa084671b8260b90e7309f41a30c5f145b95.exe

Deletes itself 1 IoCs

pid	Process
2624	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
880	gsztyerz.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 880 set thread context of 2624	880	gsztyerz.exe	101

Launches sc.exe 3 IoCs

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

pid	Process
3960	sc.exe
5032	sc.exe
4500	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
4144	2788	WerFault.exe	82
4736	880	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	cmd.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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_5bca9de0eabcbd74c4f04427a643fa084671b8260b90e7309f41a30c5f145b95.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	gsztyerz.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2788 wrote to memory of 4652	2788	JaffaCakes118_5bca9de0eabcbd74c4f04427a643fa084671b8260b90e7309f41a30c5f145b95.exe	83
PID 2788 wrote to memory of 4652	2788	JaffaCakes118_5bca9de0eabcbd74c4f04427a643fa084671b8260b90e7309f41a30c5f145b95.exe	83
PID 2788 wrote to memory of 4652	2788	JaffaCakes118_5bca9de0eabcbd74c4f04427a643fa084671b8260b90e7309f41a30c5f145b95.exe	83
PID 2788 wrote to memory of 4468	2788	JaffaCakes118_5bca9de0eabcbd74c4f04427a643fa084671b8260b90e7309f41a30c5f145b95.exe	85
PID 2788 wrote to memory of 4468	2788	JaffaCakes118_5bca9de0eabcbd74c4f04427a643fa084671b8260b90e7309f41a30c5f145b95.exe	85
PID 2788 wrote to memory of 4468	2788	JaffaCakes118_5bca9de0eabcbd74c4f04427a643fa084671b8260b90e7309f41a30c5f145b95.exe	85
PID 2788 wrote to memory of 5032	2788	JaffaCakes118_5bca9de0eabcbd74c4f04427a643fa084671b8260b90e7309f41a30c5f145b95.exe	87
PID 2788 wrote to memory of 5032	2788	JaffaCakes118_5bca9de0eabcbd74c4f04427a643fa084671b8260b90e7309f41a30c5f145b95.exe	87
PID 2788 wrote to memory of 5032	2788	JaffaCakes118_5bca9de0eabcbd74c4f04427a643fa084671b8260b90e7309f41a30c5f145b95.exe	87
PID 2788 wrote to memory of 4500	2788	JaffaCakes118_5bca9de0eabcbd74c4f04427a643fa084671b8260b90e7309f41a30c5f145b95.exe	90
PID 2788 wrote to memory of 4500	2788	JaffaCakes118_5bca9de0eabcbd74c4f04427a643fa084671b8260b90e7309f41a30c5f145b95.exe	90
PID 2788 wrote to memory of 4500	2788	JaffaCakes118_5bca9de0eabcbd74c4f04427a643fa084671b8260b90e7309f41a30c5f145b95.exe	90
PID 2788 wrote to memory of 3960	2788	JaffaCakes118_5bca9de0eabcbd74c4f04427a643fa084671b8260b90e7309f41a30c5f145b95.exe	92
PID 2788 wrote to memory of 3960	2788	JaffaCakes118_5bca9de0eabcbd74c4f04427a643fa084671b8260b90e7309f41a30c5f145b95.exe	92
PID 2788 wrote to memory of 3960	2788	JaffaCakes118_5bca9de0eabcbd74c4f04427a643fa084671b8260b90e7309f41a30c5f145b95.exe	92
PID 2788 wrote to memory of 3872	2788	JaffaCakes118_5bca9de0eabcbd74c4f04427a643fa084671b8260b90e7309f41a30c5f145b95.exe	95
PID 2788 wrote to memory of 3872	2788	JaffaCakes118_5bca9de0eabcbd74c4f04427a643fa084671b8260b90e7309f41a30c5f145b95.exe	95
PID 2788 wrote to memory of 3872	2788	JaffaCakes118_5bca9de0eabcbd74c4f04427a643fa084671b8260b90e7309f41a30c5f145b95.exe	95
PID 880 wrote to memory of 2624	880	gsztyerz.exe	101
PID 880 wrote to memory of 2624	880	gsztyerz.exe	101
PID 880 wrote to memory of 2624	880	gsztyerz.exe	101
PID 880 wrote to memory of 2624	880	gsztyerz.exe	101
PID 880 wrote to memory of 2624	880	gsztyerz.exe	101

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_5bca9de0eabcbd74c4f04427a643fa084671b8260b90e7309f41a30c5f145b95.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_5bca9de0eabcbd74c4f04427a643fa084671b8260b90e7309f41a30c5f145b95.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2788
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\yrnptgjt\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4652
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gsztyerz.exe" C:\Windows\SysWOW64\yrnptgjt\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4468
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create yrnptgjt binPath= "C:\Windows\SysWOW64\yrnptgjt\gsztyerz.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_5bca9de0eabcbd74c4f04427a643fa084671b8260b90e7309f41a30c5f145b95.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 yrnptgjt "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4500
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start yrnptgjt
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3960
- 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:3872
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2788 -s 1248
  2⤵
  - Program crash
  PID:4144

C:\Windows\SysWOW64\yrnptgjt\gsztyerz.exe
C:\Windows\SysWOW64\yrnptgjt\gsztyerz.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_5bca9de0eabcbd74c4f04427a643fa084671b8260b90e7309f41a30c5f145b95.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:880
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2624
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 880 -s 244
  2⤵
  - Program crash
  PID:4736

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 2788 -ip 2788
1⤵
PID:1692

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 880 -ip 880
1⤵
PID:3972

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\gsztyerz.exe

Filesize
12.2MB

MD5
4bc62f8c2469e76a79f66cabb4c78611

SHA1
d6c47da352282896e86706d72c35eaa3055b2170

SHA256
9d717e06d13b66f2226090ab22fee54cc92446e7c41f72a1dcd3f4550ee4e24e

SHA512
0bcd1a696a8a22634c9e3970036bcf648e7d8c537d0281e712d004761dafa8ad1e416fc5e27480ac14b816af83435c3830394e1cbabe32fdf7c9f050225cf8a1

Download Submit
memory/880-11-0x0000000000400000-0x000000000086F000-memory.dmp

Filesize
4.4MB

Download
memory/880-19-0x0000000000400000-0x000000000086F000-memory.dmp

Filesize
4.4MB

Download
memory/880-12-0x0000000000400000-0x000000000086F000-memory.dmp

Filesize
4.4MB

Download
memory/880-16-0x0000000000400000-0x000000000086F000-memory.dmp

Filesize
4.4MB

Download
memory/2624-15-0x00000000010C0000-0x00000000010D5000-memory.dmp

Filesize
84KB

Download
memory/2624-13-0x00000000010C0000-0x00000000010D5000-memory.dmp

Filesize
84KB

Download
memory/2624-17-0x00000000010C0000-0x00000000010D5000-memory.dmp

Filesize
84KB

Download
memory/2788-8-0x0000000000400000-0x000000000086F000-memory.dmp

Filesize
4.4MB

Download
memory/2788-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2788-9-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/2788-1-0x0000000000AA0000-0x0000000000BA0000-memory.dmp

Filesize
1024KB

Download
memory/2788-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2788-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads