tofsee | 4e3668f0f386e6854c53e3a7ab396c19eea40b7eb7d36cbdce35cafd1dc15c7a

General

Target

4e3668f0f386e6854c53e3a7ab396c19eea40b7eb7d36cbdce35cafd1dc15c7a.exe
Size

13.3MB
MD5

e88821744c45591e4dce49cec3a5f86a
SHA1

6c7f9cd938e3a60563f5ef4aafb889e4fc29fff5
SHA256

4e3668f0f386e6854c53e3a7ab396c19eea40b7eb7d36cbdce35cafd1dc15c7a
SHA512

dbd92c778e4507e80a77e7a285230e3e4d99961df963ac7aa9a38e42deccfe636b7b774b73d8888999518a9edf14de74ab3af343cf6866bcf3131b3e2e09748e
SSDEEP

24576:RCoZopQ3TmLgqkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk/:Msjms

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

patmushta.info

ovicrush.cn

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
2496	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\dulvsrsc\ImagePath = "C:\\Windows\\SysWOW64\\dulvsrsc\\mdzsyvzf.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-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	4e3668f0f386e6854c53e3a7ab396c19eea40b7eb7d36cbdce35cafd1dc15c7a.exe

Deletes itself 1 IoCs

pid	Process
4752	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1032	mdzsyvzf.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1032 set thread context of 4752	1032	mdzsyvzf.exe	98

Launches sc.exe 3 IoCs

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

pid	Process
1692	sc.exe
4596	sc.exe
4984	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
4948	2920	WerFault.exe	82
2652	1032	WerFault.exe	93

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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4e3668f0f386e6854c53e3a7ab396c19eea40b7eb7d36cbdce35cafd1dc15c7a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mdzsyvzf.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	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 2920 wrote to memory of 512	2920	4e3668f0f386e6854c53e3a7ab396c19eea40b7eb7d36cbdce35cafd1dc15c7a.exe	83
PID 2920 wrote to memory of 512	2920	4e3668f0f386e6854c53e3a7ab396c19eea40b7eb7d36cbdce35cafd1dc15c7a.exe	83
PID 2920 wrote to memory of 512	2920	4e3668f0f386e6854c53e3a7ab396c19eea40b7eb7d36cbdce35cafd1dc15c7a.exe	83
PID 2920 wrote to memory of 4408	2920	4e3668f0f386e6854c53e3a7ab396c19eea40b7eb7d36cbdce35cafd1dc15c7a.exe	85
PID 2920 wrote to memory of 4408	2920	4e3668f0f386e6854c53e3a7ab396c19eea40b7eb7d36cbdce35cafd1dc15c7a.exe	85
PID 2920 wrote to memory of 4408	2920	4e3668f0f386e6854c53e3a7ab396c19eea40b7eb7d36cbdce35cafd1dc15c7a.exe	85
PID 2920 wrote to memory of 1692	2920	4e3668f0f386e6854c53e3a7ab396c19eea40b7eb7d36cbdce35cafd1dc15c7a.exe	87
PID 2920 wrote to memory of 1692	2920	4e3668f0f386e6854c53e3a7ab396c19eea40b7eb7d36cbdce35cafd1dc15c7a.exe	87
PID 2920 wrote to memory of 1692	2920	4e3668f0f386e6854c53e3a7ab396c19eea40b7eb7d36cbdce35cafd1dc15c7a.exe	87
PID 2920 wrote to memory of 4596	2920	4e3668f0f386e6854c53e3a7ab396c19eea40b7eb7d36cbdce35cafd1dc15c7a.exe	89
PID 2920 wrote to memory of 4596	2920	4e3668f0f386e6854c53e3a7ab396c19eea40b7eb7d36cbdce35cafd1dc15c7a.exe	89
PID 2920 wrote to memory of 4596	2920	4e3668f0f386e6854c53e3a7ab396c19eea40b7eb7d36cbdce35cafd1dc15c7a.exe	89
PID 2920 wrote to memory of 4984	2920	4e3668f0f386e6854c53e3a7ab396c19eea40b7eb7d36cbdce35cafd1dc15c7a.exe	91
PID 2920 wrote to memory of 4984	2920	4e3668f0f386e6854c53e3a7ab396c19eea40b7eb7d36cbdce35cafd1dc15c7a.exe	91
PID 2920 wrote to memory of 4984	2920	4e3668f0f386e6854c53e3a7ab396c19eea40b7eb7d36cbdce35cafd1dc15c7a.exe	91
PID 2920 wrote to memory of 2496	2920	4e3668f0f386e6854c53e3a7ab396c19eea40b7eb7d36cbdce35cafd1dc15c7a.exe	94
PID 2920 wrote to memory of 2496	2920	4e3668f0f386e6854c53e3a7ab396c19eea40b7eb7d36cbdce35cafd1dc15c7a.exe	94
PID 2920 wrote to memory of 2496	2920	4e3668f0f386e6854c53e3a7ab396c19eea40b7eb7d36cbdce35cafd1dc15c7a.exe	94
PID 1032 wrote to memory of 4752	1032	mdzsyvzf.exe	98
PID 1032 wrote to memory of 4752	1032	mdzsyvzf.exe	98
PID 1032 wrote to memory of 4752	1032	mdzsyvzf.exe	98
PID 1032 wrote to memory of 4752	1032	mdzsyvzf.exe	98
PID 1032 wrote to memory of 4752	1032	mdzsyvzf.exe	98

C:\Users\Admin\AppData\Local\Temp\4e3668f0f386e6854c53e3a7ab396c19eea40b7eb7d36cbdce35cafd1dc15c7a.exe
"C:\Users\Admin\AppData\Local\Temp\4e3668f0f386e6854c53e3a7ab396c19eea40b7eb7d36cbdce35cafd1dc15c7a.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2920
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\dulvsrsc\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:512
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\mdzsyvzf.exe" C:\Windows\SysWOW64\dulvsrsc\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4408
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create dulvsrsc binPath= "C:\Windows\SysWOW64\dulvsrsc\mdzsyvzf.exe /d\"C:\Users\Admin\AppData\Local\Temp\4e3668f0f386e6854c53e3a7ab396c19eea40b7eb7d36cbdce35cafd1dc15c7a.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1692
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description dulvsrsc "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4596
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start dulvsrsc
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4984
- 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:2496
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2920 -s 1204
  2⤵
  - Program crash
  PID:4948

C:\Windows\SysWOW64\dulvsrsc\mdzsyvzf.exe
C:\Windows\SysWOW64\dulvsrsc\mdzsyvzf.exe /d"C:\Users\Admin\AppData\Local\Temp\4e3668f0f386e6854c53e3a7ab396c19eea40b7eb7d36cbdce35cafd1dc15c7a.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1032
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4752
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1032 -s 512
  2⤵
  - Program crash
  PID:2652

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 2920 -ip 2920
1⤵
PID:4880

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 1032 -ip 1032
1⤵
PID:1436

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\mdzsyvzf.exe

Filesize
12.7MB

MD5
acef82fabc9dc3c71c3930d6198f4266

SHA1
010c6e4c4c8a537b55181b8cde61364a2726aafa

SHA256
6bea5c2ad81511fab9ab6c3bb1c6ee07843f53d8963ce155fd0dacc0c69f8920

SHA512
6ea68205fcf4dced434ab6cc3d1c509a0899dca0817aa3dfe1ac18e0de2d1b422289a5520eb5b69a1ece8555cc81859fe1d7726b2fb3f92b162202ceb8f84c8e

Download Submit
memory/1032-8-0x0000000000400000-0x0000000000477000-memory.dmp

Filesize
476KB

Download
memory/1032-18-0x0000000000400000-0x0000000000477000-memory.dmp

Filesize
476KB

Download
memory/1032-9-0x0000000000400000-0x0000000000477000-memory.dmp

Filesize
476KB

Download
memory/2920-16-0x0000000000400000-0x0000000000477000-memory.dmp

Filesize
476KB

Download
memory/2920-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2920-13-0x0000000000570000-0x0000000000670000-memory.dmp

Filesize
1024KB

Download
memory/2920-19-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2920-2-0x0000000000550000-0x0000000000563000-memory.dmp

Filesize
76KB

Download
memory/2920-17-0x0000000000550000-0x0000000000563000-memory.dmp

Filesize
76KB

Download
memory/2920-1-0x0000000000570000-0x0000000000670000-memory.dmp

Filesize
1024KB

Download
memory/4752-14-0x0000000000F30000-0x0000000000F45000-memory.dmp

Filesize
84KB

Download
memory/4752-10-0x0000000000F30000-0x0000000000F45000-memory.dmp

Filesize
84KB

Download
memory/4752-20-0x0000000000F30000-0x0000000000F45000-memory.dmp

Filesize
84KB

Download
memory/4752-21-0x0000000000F30000-0x0000000000F45000-memory.dmp

Filesize
84KB

Download
memory/4752-22-0x0000000000F30000-0x0000000000F45000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads