tofsee | 1a2930f4c27f868ebeaf35539931c849b83172e8c8d932fdb78c7117e87e7ed8

General

Target

f37390a26f9c15b9b1272b6cdd3ee383_JaffaCakes118.exe
Size

14.6MB
MD5

f37390a26f9c15b9b1272b6cdd3ee383
SHA1

7b01075a1374f02fddbe51d2fee3525d11fc382b
SHA256

1a2930f4c27f868ebeaf35539931c849b83172e8c8d932fdb78c7117e87e7ed8
SHA512

d34b05867a9c582758ae7423a0a8e0c613ec2628002acd669409ff692d21b4e905ef350706ef6cc58c6db59045bcb27c0ba1e098a89a7a970a3c82ec26a74912
SSDEEP

24576:ZMV9biUnMNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN3:+Fn

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
4124	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\hqtwfxxc\ImagePath = "C:\\Windows\\SysWOW64\\hqtwfxxc\\icyepzrx.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	f37390a26f9c15b9b1272b6cdd3ee383_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
4924	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3808	icyepzrx.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3808 set thread context of 4924	3808	icyepzrx.exe	101

Launches sc.exe 3 IoCs

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

pid	Process
3352	sc.exe
1172	sc.exe
1512	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
3636	2992	WerFault.exe	82
3556	3808	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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f37390a26f9c15b9b1272b6cdd3ee383_JaffaCakes118.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
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	icyepzrx.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2992 wrote to memory of 4136	2992	f37390a26f9c15b9b1272b6cdd3ee383_JaffaCakes118.exe	83
PID 2992 wrote to memory of 4136	2992	f37390a26f9c15b9b1272b6cdd3ee383_JaffaCakes118.exe	83
PID 2992 wrote to memory of 4136	2992	f37390a26f9c15b9b1272b6cdd3ee383_JaffaCakes118.exe	83
PID 2992 wrote to memory of 348	2992	f37390a26f9c15b9b1272b6cdd3ee383_JaffaCakes118.exe	85
PID 2992 wrote to memory of 348	2992	f37390a26f9c15b9b1272b6cdd3ee383_JaffaCakes118.exe	85
PID 2992 wrote to memory of 348	2992	f37390a26f9c15b9b1272b6cdd3ee383_JaffaCakes118.exe	85
PID 2992 wrote to memory of 3352	2992	f37390a26f9c15b9b1272b6cdd3ee383_JaffaCakes118.exe	87
PID 2992 wrote to memory of 3352	2992	f37390a26f9c15b9b1272b6cdd3ee383_JaffaCakes118.exe	87
PID 2992 wrote to memory of 3352	2992	f37390a26f9c15b9b1272b6cdd3ee383_JaffaCakes118.exe	87
PID 2992 wrote to memory of 1172	2992	f37390a26f9c15b9b1272b6cdd3ee383_JaffaCakes118.exe	90
PID 2992 wrote to memory of 1172	2992	f37390a26f9c15b9b1272b6cdd3ee383_JaffaCakes118.exe	90
PID 2992 wrote to memory of 1172	2992	f37390a26f9c15b9b1272b6cdd3ee383_JaffaCakes118.exe	90
PID 2992 wrote to memory of 1512	2992	f37390a26f9c15b9b1272b6cdd3ee383_JaffaCakes118.exe	92
PID 2992 wrote to memory of 1512	2992	f37390a26f9c15b9b1272b6cdd3ee383_JaffaCakes118.exe	92
PID 2992 wrote to memory of 1512	2992	f37390a26f9c15b9b1272b6cdd3ee383_JaffaCakes118.exe	92
PID 2992 wrote to memory of 4124	2992	f37390a26f9c15b9b1272b6cdd3ee383_JaffaCakes118.exe	95
PID 2992 wrote to memory of 4124	2992	f37390a26f9c15b9b1272b6cdd3ee383_JaffaCakes118.exe	95
PID 2992 wrote to memory of 4124	2992	f37390a26f9c15b9b1272b6cdd3ee383_JaffaCakes118.exe	95
PID 3808 wrote to memory of 4924	3808	icyepzrx.exe	101
PID 3808 wrote to memory of 4924	3808	icyepzrx.exe	101
PID 3808 wrote to memory of 4924	3808	icyepzrx.exe	101
PID 3808 wrote to memory of 4924	3808	icyepzrx.exe	101
PID 3808 wrote to memory of 4924	3808	icyepzrx.exe	101

C:\Users\Admin\AppData\Local\Temp\f37390a26f9c15b9b1272b6cdd3ee383_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f37390a26f9c15b9b1272b6cdd3ee383_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2992
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hqtwfxxc\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4136
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\icyepzrx.exe" C:\Windows\SysWOW64\hqtwfxxc\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:348
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create hqtwfxxc binPath= "C:\Windows\SysWOW64\hqtwfxxc\icyepzrx.exe /d\"C:\Users\Admin\AppData\Local\Temp\f37390a26f9c15b9b1272b6cdd3ee383_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3352
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description hqtwfxxc "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1172
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start hqtwfxxc
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1512
- 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:4124
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2992 -s 1040
  2⤵
  - Program crash
  PID:3636

C:\Windows\SysWOW64\hqtwfxxc\icyepzrx.exe
C:\Windows\SysWOW64\hqtwfxxc\icyepzrx.exe /d"C:\Users\Admin\AppData\Local\Temp\f37390a26f9c15b9b1272b6cdd3ee383_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3808
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4924
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3808 -s 516
  2⤵
  - Program crash
  PID:3556

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 2992 -ip 2992
1⤵
PID:2780

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 3808 -ip 3808
1⤵
PID:2672

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\icyepzrx.exe

Filesize
13.4MB

MD5
527e0579037b121482935592ba7156b7

SHA1
888f1dbdda3410ba624d896f01233a4016f91867

SHA256
7704e5b50ce33ff27b55b29e3a02a7a8bd62cb25ab3eb12d1086e860078a1448

SHA512
4a7d73bcae57ddb88c1b9da99ad49dade83902434e6123ddacc67f487142d0d8a2ccc9474c3eac2186a8bf17f32abb75242cce15fd16f1dc07ee767eb7e0aae9

Download Submit
memory/2992-1-0x0000000002C60000-0x0000000002D60000-memory.dmp

Filesize
1024KB

Download
memory/2992-2-0x0000000002FE0000-0x0000000002FF3000-memory.dmp

Filesize
76KB

Download
memory/2992-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2992-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2992-9-0x0000000002FE0000-0x0000000002FF3000-memory.dmp

Filesize
76KB

Download
memory/2992-8-0x0000000000400000-0x0000000002B8F000-memory.dmp

Filesize
39.6MB

Download
memory/3808-15-0x0000000000400000-0x0000000002B8F000-memory.dmp

Filesize
39.6MB

Download
memory/4924-11-0x0000000000EE0000-0x0000000000EF5000-memory.dmp

Filesize
84KB

Download
memory/4924-13-0x0000000000EE0000-0x0000000000EF5000-memory.dmp

Filesize
84KB

Download
memory/4924-14-0x0000000000EE0000-0x0000000000EF5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads