tofsee | b0fb789b12fe519394c6e06244144714dc69e11aedef07afae8613825a334232

General

Target

b0fb789b12fe519394c6e06244144714dc69e11aedef07afae8613825a334232.exe
Size

10.2MB
MD5

6a0022b6a2cd33ab4b1101994ecc83b0
SHA1

bdf20c798bbaf6e8c8fa7da8a9485046a03b02fb
SHA256

b0fb789b12fe519394c6e06244144714dc69e11aedef07afae8613825a334232
SHA512

dbf1341b52c6970151073494c1c398b9e1bed803a10f7f907a4fe079c5632569902fcc3729c85d8760b404ab92be302b57ac963c3658158d1dcba50fc4fd82bc
SSDEEP

24576:nW6y/MK+Iw9zXIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII:W7X

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

patmushta.info

parubey.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
4872	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\cxdyrprt\ImagePath = "C:\\Windows\\SysWOW64\\cxdyrprt\\vcxotykr.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-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	b0fb789b12fe519394c6e06244144714dc69e11aedef07afae8613825a334232.exe

Deletes itself 1 IoCs

pid	Process
5012	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2992	vcxotykr.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2992 set thread context of 5012	2992	vcxotykr.exe	103

Launches sc.exe 3 IoCs

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

pid	Process
2472	sc.exe
1344	sc.exe
2888	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
1680	3208	WerFault.exe	83
968	2992	WerFault.exe	97

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	vcxotykr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b0fb789b12fe519394c6e06244144714dc69e11aedef07afae8613825a334232.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	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3208 wrote to memory of 4860	3208	b0fb789b12fe519394c6e06244144714dc69e11aedef07afae8613825a334232.exe	87
PID 3208 wrote to memory of 4860	3208	b0fb789b12fe519394c6e06244144714dc69e11aedef07afae8613825a334232.exe	87
PID 3208 wrote to memory of 4860	3208	b0fb789b12fe519394c6e06244144714dc69e11aedef07afae8613825a334232.exe	87
PID 3208 wrote to memory of 2796	3208	b0fb789b12fe519394c6e06244144714dc69e11aedef07afae8613825a334232.exe	89
PID 3208 wrote to memory of 2796	3208	b0fb789b12fe519394c6e06244144714dc69e11aedef07afae8613825a334232.exe	89
PID 3208 wrote to memory of 2796	3208	b0fb789b12fe519394c6e06244144714dc69e11aedef07afae8613825a334232.exe	89
PID 3208 wrote to memory of 2472	3208	b0fb789b12fe519394c6e06244144714dc69e11aedef07afae8613825a334232.exe	91
PID 3208 wrote to memory of 2472	3208	b0fb789b12fe519394c6e06244144714dc69e11aedef07afae8613825a334232.exe	91
PID 3208 wrote to memory of 2472	3208	b0fb789b12fe519394c6e06244144714dc69e11aedef07afae8613825a334232.exe	91
PID 3208 wrote to memory of 1344	3208	b0fb789b12fe519394c6e06244144714dc69e11aedef07afae8613825a334232.exe	93
PID 3208 wrote to memory of 1344	3208	b0fb789b12fe519394c6e06244144714dc69e11aedef07afae8613825a334232.exe	93
PID 3208 wrote to memory of 1344	3208	b0fb789b12fe519394c6e06244144714dc69e11aedef07afae8613825a334232.exe	93
PID 3208 wrote to memory of 2888	3208	b0fb789b12fe519394c6e06244144714dc69e11aedef07afae8613825a334232.exe	95
PID 3208 wrote to memory of 2888	3208	b0fb789b12fe519394c6e06244144714dc69e11aedef07afae8613825a334232.exe	95
PID 3208 wrote to memory of 2888	3208	b0fb789b12fe519394c6e06244144714dc69e11aedef07afae8613825a334232.exe	95
PID 3208 wrote to memory of 4872	3208	b0fb789b12fe519394c6e06244144714dc69e11aedef07afae8613825a334232.exe	98
PID 3208 wrote to memory of 4872	3208	b0fb789b12fe519394c6e06244144714dc69e11aedef07afae8613825a334232.exe	98
PID 3208 wrote to memory of 4872	3208	b0fb789b12fe519394c6e06244144714dc69e11aedef07afae8613825a334232.exe	98
PID 2992 wrote to memory of 5012	2992	vcxotykr.exe	103
PID 2992 wrote to memory of 5012	2992	vcxotykr.exe	103
PID 2992 wrote to memory of 5012	2992	vcxotykr.exe	103
PID 2992 wrote to memory of 5012	2992	vcxotykr.exe	103
PID 2992 wrote to memory of 5012	2992	vcxotykr.exe	103

C:\Users\Admin\AppData\Local\Temp\b0fb789b12fe519394c6e06244144714dc69e11aedef07afae8613825a334232.exe
"C:\Users\Admin\AppData\Local\Temp\b0fb789b12fe519394c6e06244144714dc69e11aedef07afae8613825a334232.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3208
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\cxdyrprt\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4860
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vcxotykr.exe" C:\Windows\SysWOW64\cxdyrprt\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2796
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create cxdyrprt binPath= "C:\Windows\SysWOW64\cxdyrprt\vcxotykr.exe /d\"C:\Users\Admin\AppData\Local\Temp\b0fb789b12fe519394c6e06244144714dc69e11aedef07afae8613825a334232.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2472
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description cxdyrprt "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1344
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start cxdyrprt
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2888
- 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:4872
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3208 -s 1040
  2⤵
  - Program crash
  PID:1680

C:\Windows\SysWOW64\cxdyrprt\vcxotykr.exe
C:\Windows\SysWOW64\cxdyrprt\vcxotykr.exe /d"C:\Users\Admin\AppData\Local\Temp\b0fb789b12fe519394c6e06244144714dc69e11aedef07afae8613825a334232.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2992
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:5012
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2992 -s 512
  2⤵
  - Program crash
  PID:968

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 3208 -ip 3208
1⤵
PID:4408

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 508 -p 2992 -ip 2992
1⤵
PID:4980

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\vcxotykr.exe

Filesize
13.7MB

MD5
7932d47017fa70662eb8a562311e387d

SHA1
a959450277e8760cdd0a8a7d2e78d9f048bfe1d7

SHA256
06f708843d20041b2b2038a4468feb8fd0f1196799cecd408d6f8e200fa66811

SHA512
aa1982ad1aedcc6cda740959592b6d7571accf028e00ba46b1f19823137fe918830d98a668d8231b0ef5f1ac1ac75c1328ab4b2a04e8ba0d3b8ecc2f54d31b29

Download Submit
memory/2992-11-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download
memory/2992-17-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download
memory/3208-1-0x0000000000730000-0x0000000000830000-memory.dmp

Filesize
1024KB

Download
memory/3208-2-0x00000000020D0000-0x00000000020E3000-memory.dmp

Filesize
76KB

Download
memory/3208-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3208-8-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download
memory/3208-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3208-9-0x00000000020D0000-0x00000000020E3000-memory.dmp

Filesize
76KB

Download
memory/5012-12-0x00000000012B0000-0x00000000012C5000-memory.dmp

Filesize
84KB

Download
memory/5012-14-0x00000000012B0000-0x00000000012C5000-memory.dmp

Filesize
84KB

Download
memory/5012-15-0x00000000012B0000-0x00000000012C5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads