tofsee | 8e89363cc4699cf8b0cafdc315b3f7812bdfaed7d08fc12405d57819a578c409

General

Target

8e89363cc4699cf8b0cafdc315b3f7812bdfaed7d08fc12405d57819a578c409.exe
Size

12.2MB
MD5

6d34bacd46809e859bff58500bf02794
SHA1

a75d1bcc9dda02dd6bb8dd886d626bdc88d5195d
SHA256

8e89363cc4699cf8b0cafdc315b3f7812bdfaed7d08fc12405d57819a578c409
SHA512

61636f313ebeabd34cc4d320a2efe23d45c8c7118da83d96800d7cdeffcd23495cbf7a5a018204c9b16d58a9e9d6b644ce18e7680cfb6f8122d49924d65be3f9
SSDEEP

6144:d9fvApQ0bA3aGmYv+943cj9G+LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLW:d9fvApQ0bjGme84Mj90

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
1132	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\xiqybwuo\ImagePath = "C:\\Windows\\SysWOW64\\xiqybwuo\\iubvagtb.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-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	8e89363cc4699cf8b0cafdc315b3f7812bdfaed7d08fc12405d57819a578c409.exe

Deletes itself 1 IoCs

pid	Process
528	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1700	iubvagtb.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1700 set thread context of 528	1700	iubvagtb.exe	100

Launches sc.exe 3 IoCs

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

pid	Process
3740	sc.exe
2160	sc.exe
4300	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
3356	2368	WerFault.exe	81
1040	1700	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	iubvagtb.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8e89363cc4699cf8b0cafdc315b3f7812bdfaed7d08fc12405d57819a578c409.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2368 wrote to memory of 1028	2368	8e89363cc4699cf8b0cafdc315b3f7812bdfaed7d08fc12405d57819a578c409.exe	82
PID 2368 wrote to memory of 1028	2368	8e89363cc4699cf8b0cafdc315b3f7812bdfaed7d08fc12405d57819a578c409.exe	82
PID 2368 wrote to memory of 1028	2368	8e89363cc4699cf8b0cafdc315b3f7812bdfaed7d08fc12405d57819a578c409.exe	82
PID 2368 wrote to memory of 3528	2368	8e89363cc4699cf8b0cafdc315b3f7812bdfaed7d08fc12405d57819a578c409.exe	84
PID 2368 wrote to memory of 3528	2368	8e89363cc4699cf8b0cafdc315b3f7812bdfaed7d08fc12405d57819a578c409.exe	84
PID 2368 wrote to memory of 3528	2368	8e89363cc4699cf8b0cafdc315b3f7812bdfaed7d08fc12405d57819a578c409.exe	84
PID 2368 wrote to memory of 2160	2368	8e89363cc4699cf8b0cafdc315b3f7812bdfaed7d08fc12405d57819a578c409.exe	86
PID 2368 wrote to memory of 2160	2368	8e89363cc4699cf8b0cafdc315b3f7812bdfaed7d08fc12405d57819a578c409.exe	86
PID 2368 wrote to memory of 2160	2368	8e89363cc4699cf8b0cafdc315b3f7812bdfaed7d08fc12405d57819a578c409.exe	86
PID 2368 wrote to memory of 4300	2368	8e89363cc4699cf8b0cafdc315b3f7812bdfaed7d08fc12405d57819a578c409.exe	88
PID 2368 wrote to memory of 4300	2368	8e89363cc4699cf8b0cafdc315b3f7812bdfaed7d08fc12405d57819a578c409.exe	88
PID 2368 wrote to memory of 4300	2368	8e89363cc4699cf8b0cafdc315b3f7812bdfaed7d08fc12405d57819a578c409.exe	88
PID 2368 wrote to memory of 3740	2368	8e89363cc4699cf8b0cafdc315b3f7812bdfaed7d08fc12405d57819a578c409.exe	92
PID 2368 wrote to memory of 3740	2368	8e89363cc4699cf8b0cafdc315b3f7812bdfaed7d08fc12405d57819a578c409.exe	92
PID 2368 wrote to memory of 3740	2368	8e89363cc4699cf8b0cafdc315b3f7812bdfaed7d08fc12405d57819a578c409.exe	92
PID 2368 wrote to memory of 1132	2368	8e89363cc4699cf8b0cafdc315b3f7812bdfaed7d08fc12405d57819a578c409.exe	95
PID 2368 wrote to memory of 1132	2368	8e89363cc4699cf8b0cafdc315b3f7812bdfaed7d08fc12405d57819a578c409.exe	95
PID 2368 wrote to memory of 1132	2368	8e89363cc4699cf8b0cafdc315b3f7812bdfaed7d08fc12405d57819a578c409.exe	95
PID 1700 wrote to memory of 528	1700	iubvagtb.exe	100
PID 1700 wrote to memory of 528	1700	iubvagtb.exe	100
PID 1700 wrote to memory of 528	1700	iubvagtb.exe	100
PID 1700 wrote to memory of 528	1700	iubvagtb.exe	100
PID 1700 wrote to memory of 528	1700	iubvagtb.exe	100

C:\Users\Admin\AppData\Local\Temp\8e89363cc4699cf8b0cafdc315b3f7812bdfaed7d08fc12405d57819a578c409.exe
"C:\Users\Admin\AppData\Local\Temp\8e89363cc4699cf8b0cafdc315b3f7812bdfaed7d08fc12405d57819a578c409.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2368
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xiqybwuo\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1028
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\iubvagtb.exe" C:\Windows\SysWOW64\xiqybwuo\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3528
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create xiqybwuo binPath= "C:\Windows\SysWOW64\xiqybwuo\iubvagtb.exe /d\"C:\Users\Admin\AppData\Local\Temp\8e89363cc4699cf8b0cafdc315b3f7812bdfaed7d08fc12405d57819a578c409.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2160
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description xiqybwuo "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4300
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start xiqybwuo
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3740
- 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:1132
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2368 -s 1036
  2⤵
  - Program crash
  PID:3356

C:\Windows\SysWOW64\xiqybwuo\iubvagtb.exe
C:\Windows\SysWOW64\xiqybwuo\iubvagtb.exe /d"C:\Users\Admin\AppData\Local\Temp\8e89363cc4699cf8b0cafdc315b3f7812bdfaed7d08fc12405d57819a578c409.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1700
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:528
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1700 -s 512
  2⤵
  - Program crash
  PID:1040

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 2368 -ip 2368
1⤵
PID:2264

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 1700 -ip 1700
1⤵
PID:4212

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\iubvagtb.exe

Filesize
10.8MB

MD5
09e162771a4f9bd0a5d19eb16bf31bba

SHA1
1bf8dc4bf5966f76e90f6afde093374ba9dd958e

SHA256
3272eff396caa479f1d10eca069878bf407fa85f2bb87a134c9f08c00b851a50

SHA512
f8bd3b68360d9769f82cf786a8e0ed021b10ea9d2315aeec004ec59a0a3e62b5056e9b470e6564192ffedc1a8172f4879910c8b8f6628169e372e5a09e719d50

Download Submit
memory/528-11-0x0000000000C40000-0x0000000000C55000-memory.dmp

Filesize
84KB

Download
memory/528-13-0x0000000000C40000-0x0000000000C55000-memory.dmp

Filesize
84KB

Download
memory/528-15-0x0000000000C40000-0x0000000000C55000-memory.dmp

Filesize
84KB

Download
memory/1700-14-0x0000000000400000-0x0000000002B8F000-memory.dmp

Filesize
39.6MB

Download
memory/2368-1-0x0000000002D40000-0x0000000002E40000-memory.dmp

Filesize
1024KB

Download
memory/2368-2-0x0000000002C60000-0x0000000002C73000-memory.dmp

Filesize
76KB

Download
memory/2368-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2368-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2368-9-0x0000000002C60000-0x0000000002C73000-memory.dmp

Filesize
76KB

Download
memory/2368-8-0x0000000000400000-0x0000000002B8F000-memory.dmp

Filesize
39.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads