tofsee | 1868c1cbcb3587d158d0465a1a6f7abfe8af106aef076ceb916e746a0d184adc

General

Target

1868c1cbcb3587d158d0465a1a6f7abfe8af106aef076ceb916e746a0d184adc.exe
Size

15.0MB
MD5

f480f6c7401bffe8b0f86af3ebcd0182
SHA1

af882623b8c62e80b69fe4b2d5841be744364665
SHA256

1868c1cbcb3587d158d0465a1a6f7abfe8af106aef076ceb916e746a0d184adc
SHA512

84f00f4a7a2ad086a4f9fae8c08d854db6ec9c5df2feca1a4c76d01a5726522e86123d85e81fe01fdaca7569ff35805438ce0fa398a6e1e6a5c424c10eae00a6
SSDEEP

24576:PCoZopQ3TmLgqkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkP:Ksjms

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
4024	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\ryoftud\ImagePath = "C:\\Windows\\SysWOW64\\ryoftud\\iqyfexwe.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-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	1868c1cbcb3587d158d0465a1a6f7abfe8af106aef076ceb916e746a0d184adc.exe

Deletes itself 1 IoCs

pid	Process
1292	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
736	iqyfexwe.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 736 set thread context of 1292	736	iqyfexwe.exe	96

Launches sc.exe 3 IoCs

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

pid	Process
456	sc.exe
4808	sc.exe
3972	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
3680	3100	WerFault.exe	81
644	736	WerFault.exe	92

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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	iqyfexwe.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	1868c1cbcb3587d158d0465a1a6f7abfe8af106aef076ceb916e746a0d184adc.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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3100 wrote to memory of 972	3100	1868c1cbcb3587d158d0465a1a6f7abfe8af106aef076ceb916e746a0d184adc.exe	82
PID 3100 wrote to memory of 972	3100	1868c1cbcb3587d158d0465a1a6f7abfe8af106aef076ceb916e746a0d184adc.exe	82
PID 3100 wrote to memory of 972	3100	1868c1cbcb3587d158d0465a1a6f7abfe8af106aef076ceb916e746a0d184adc.exe	82
PID 3100 wrote to memory of 3344	3100	1868c1cbcb3587d158d0465a1a6f7abfe8af106aef076ceb916e746a0d184adc.exe	84
PID 3100 wrote to memory of 3344	3100	1868c1cbcb3587d158d0465a1a6f7abfe8af106aef076ceb916e746a0d184adc.exe	84
PID 3100 wrote to memory of 3344	3100	1868c1cbcb3587d158d0465a1a6f7abfe8af106aef076ceb916e746a0d184adc.exe	84
PID 3100 wrote to memory of 4808	3100	1868c1cbcb3587d158d0465a1a6f7abfe8af106aef076ceb916e746a0d184adc.exe	86
PID 3100 wrote to memory of 4808	3100	1868c1cbcb3587d158d0465a1a6f7abfe8af106aef076ceb916e746a0d184adc.exe	86
PID 3100 wrote to memory of 4808	3100	1868c1cbcb3587d158d0465a1a6f7abfe8af106aef076ceb916e746a0d184adc.exe	86
PID 3100 wrote to memory of 3972	3100	1868c1cbcb3587d158d0465a1a6f7abfe8af106aef076ceb916e746a0d184adc.exe	88
PID 3100 wrote to memory of 3972	3100	1868c1cbcb3587d158d0465a1a6f7abfe8af106aef076ceb916e746a0d184adc.exe	88
PID 3100 wrote to memory of 3972	3100	1868c1cbcb3587d158d0465a1a6f7abfe8af106aef076ceb916e746a0d184adc.exe	88
PID 3100 wrote to memory of 456	3100	1868c1cbcb3587d158d0465a1a6f7abfe8af106aef076ceb916e746a0d184adc.exe	90
PID 3100 wrote to memory of 456	3100	1868c1cbcb3587d158d0465a1a6f7abfe8af106aef076ceb916e746a0d184adc.exe	90
PID 3100 wrote to memory of 456	3100	1868c1cbcb3587d158d0465a1a6f7abfe8af106aef076ceb916e746a0d184adc.exe	90
PID 3100 wrote to memory of 4024	3100	1868c1cbcb3587d158d0465a1a6f7abfe8af106aef076ceb916e746a0d184adc.exe	93
PID 3100 wrote to memory of 4024	3100	1868c1cbcb3587d158d0465a1a6f7abfe8af106aef076ceb916e746a0d184adc.exe	93
PID 3100 wrote to memory of 4024	3100	1868c1cbcb3587d158d0465a1a6f7abfe8af106aef076ceb916e746a0d184adc.exe	93
PID 736 wrote to memory of 1292	736	iqyfexwe.exe	96
PID 736 wrote to memory of 1292	736	iqyfexwe.exe	96
PID 736 wrote to memory of 1292	736	iqyfexwe.exe	96
PID 736 wrote to memory of 1292	736	iqyfexwe.exe	96
PID 736 wrote to memory of 1292	736	iqyfexwe.exe	96

C:\Users\Admin\AppData\Local\Temp\1868c1cbcb3587d158d0465a1a6f7abfe8af106aef076ceb916e746a0d184adc.exe
"C:\Users\Admin\AppData\Local\Temp\1868c1cbcb3587d158d0465a1a6f7abfe8af106aef076ceb916e746a0d184adc.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3100
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ryoftud\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:972
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\iqyfexwe.exe" C:\Windows\SysWOW64\ryoftud\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3344
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ryoftud binPath= "C:\Windows\SysWOW64\ryoftud\iqyfexwe.exe /d\"C:\Users\Admin\AppData\Local\Temp\1868c1cbcb3587d158d0465a1a6f7abfe8af106aef076ceb916e746a0d184adc.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4808
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ryoftud "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3972
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ryoftud
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:456
- 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:4024
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3100 -s 1040
  2⤵
  - Program crash
  PID:3680

C:\Windows\SysWOW64\ryoftud\iqyfexwe.exe
C:\Windows\SysWOW64\ryoftud\iqyfexwe.exe /d"C:\Users\Admin\AppData\Local\Temp\1868c1cbcb3587d158d0465a1a6f7abfe8af106aef076ceb916e746a0d184adc.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:736
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1292
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 736 -s 560
  2⤵
  - Program crash
  PID:644

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 736 -ip 736
1⤵
PID:2316

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 476 -p 3100 -ip 3100
1⤵
PID:1332

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\iqyfexwe.exe

Filesize
12.7MB

MD5
d8fc2e73c72c2320b72c4449d42003f5

SHA1
59681cc0f26b2e9e243020c59f0d0ecb0a2ee921

SHA256
36d0b9b56c6a211255618cf20d7ae5dd428eabec1f6e8487674dd3aec524a6fb

SHA512
36adec38926d6b4da1288dafd4a088043a77b6e3e047a5541324912cc417d22a8cdbb695e6d8e3d8d7d2ce0b35098d23f6b0ddae2f93d68834187f8b3ff114f4

Download Submit
memory/736-8-0x0000000000400000-0x0000000000477000-memory.dmp

Filesize
476KB

Download
memory/736-9-0x0000000000400000-0x0000000000477000-memory.dmp

Filesize
476KB

Download
memory/736-15-0x0000000000400000-0x0000000000477000-memory.dmp

Filesize
476KB

Download
memory/1292-10-0x0000000000FD0000-0x0000000000FE5000-memory.dmp

Filesize
84KB

Download
memory/1292-13-0x0000000000FD0000-0x0000000000FE5000-memory.dmp

Filesize
84KB

Download
memory/1292-19-0x0000000000FD0000-0x0000000000FE5000-memory.dmp

Filesize
84KB

Download
memory/1292-20-0x0000000000FD0000-0x0000000000FE5000-memory.dmp

Filesize
84KB

Download
memory/1292-21-0x0000000000FD0000-0x0000000000FE5000-memory.dmp

Filesize
84KB

Download
memory/3100-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3100-1-0x00000000004A0000-0x00000000005A0000-memory.dmp

Filesize
1024KB

Download
memory/3100-2-0x00000000021D0000-0x00000000021E3000-memory.dmp

Filesize
76KB

Download
memory/3100-18-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3100-17-0x00000000021D0000-0x00000000021E3000-memory.dmp

Filesize
76KB

Download
memory/3100-16-0x0000000000400000-0x0000000000477000-memory.dmp

Filesize
476KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads