tofsee | b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb

General

Target

b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe
Size

12.1MB
MD5

ffa1b8f70c8986ed5d92cc065e09e9d0
SHA1

a3dc175cbaf7da499dd09298e303144fac0ec032
SHA256

b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb
SHA512

60dcb3bb2d9720b8012452c57bfb4633ae5e14892bc99306a5d70864fa72dbdceae8278aec6ebf1223baf5d2ff2664b1fe88a728f8254a71ab41cd2fde3d8e4d
SSDEEP

24576:iW6y/MK+Iw9zXIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII:Z7X

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

Processes:

netsh.exe

pid process

560 netsh.exe

pid	process
560	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\oimwinqf\ImagePath = "C:\\Windows\\SysWOW64\\oimwinqf\\ecfbjrfy.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

Processes:

b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

3228 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

ecfbjrfy.exe

pid process

1388 ecfbjrfy.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

ecfbjrfy.exe

description pid process target process

PID 1388 set thread context of 3228 1388 ecfbjrfy.exe svchost.exe
Launches sc.exe 3 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exesc.exesc.exe

pid process

3248 sc.exe
4820 sc.exe
4024 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
3228	svchost.exe

pid	process
1388	ecfbjrfy.exe

description	pid	process	target process
PID 1388 set thread context of 3228	1388	ecfbjrfy.exe	svchost.exe

pid	process
3248	sc.exe
4820	sc.exe
4024	sc.exe

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

Processes:

netsh.exe

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

Processes:

WerFault.exeWerFault.exe

pid	pid_target	process	target process
4284	3944	WerFault.exe	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe
2672	1388	WerFault.exe	ecfbjrfy.exe

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

Processes:

svchost.exeb41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.execmd.execmd.exesc.exesc.exesc.exeecfbjrfy.exenetsh.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ecfbjrfy.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exeecfbjrfy.exe

description	pid	process	target process
PID 3944 wrote to memory of 4528	3944	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	cmd.exe
PID 3944 wrote to memory of 4528	3944	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	cmd.exe
PID 3944 wrote to memory of 4528	3944	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	cmd.exe
PID 3944 wrote to memory of 2240	3944	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	cmd.exe
PID 3944 wrote to memory of 2240	3944	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	cmd.exe
PID 3944 wrote to memory of 2240	3944	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	cmd.exe
PID 3944 wrote to memory of 3248	3944	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	sc.exe
PID 3944 wrote to memory of 3248	3944	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	sc.exe
PID 3944 wrote to memory of 3248	3944	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	sc.exe
PID 3944 wrote to memory of 4820	3944	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	sc.exe
PID 3944 wrote to memory of 4820	3944	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	sc.exe
PID 3944 wrote to memory of 4820	3944	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	sc.exe
PID 3944 wrote to memory of 4024	3944	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	sc.exe
PID 3944 wrote to memory of 4024	3944	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	sc.exe
PID 3944 wrote to memory of 4024	3944	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	sc.exe
PID 3944 wrote to memory of 560	3944	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	netsh.exe
PID 3944 wrote to memory of 560	3944	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	netsh.exe
PID 3944 wrote to memory of 560	3944	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	netsh.exe
PID 1388 wrote to memory of 3228	1388	ecfbjrfy.exe	svchost.exe
PID 1388 wrote to memory of 3228	1388	ecfbjrfy.exe	svchost.exe
PID 1388 wrote to memory of 3228	1388	ecfbjrfy.exe	svchost.exe
PID 1388 wrote to memory of 3228	1388	ecfbjrfy.exe	svchost.exe
PID 1388 wrote to memory of 3228	1388	ecfbjrfy.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe
"C:\Users\Admin\AppData\Local\Temp\b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3944
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\oimwinqf\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4528
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ecfbjrfy.exe" C:\Windows\SysWOW64\oimwinqf\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2240
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create oimwinqf binPath= "C:\Windows\SysWOW64\oimwinqf\ecfbjrfy.exe /d\"C:\Users\Admin\AppData\Local\Temp\b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3248
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description oimwinqf "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4820
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start oimwinqf
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4024
- 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:560
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3944 -s 1040
  2⤵
  - Program crash
  PID:4284

C:\Windows\SysWOW64\oimwinqf\ecfbjrfy.exe
C:\Windows\SysWOW64\oimwinqf\ecfbjrfy.exe /d"C:\Users\Admin\AppData\Local\Temp\b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1388
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3228
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1388 -s 516
  2⤵
  - Program crash
  PID:2672

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 3944 -ip 3944
1⤵
PID:3976

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 1388 -ip 1388
1⤵
PID:3104

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\ecfbjrfy.exe

Filesize
12.6MB

MD5
97c2d1cee690fb4dd637734195c70b50

SHA1
039400787ed8d2550ed4799183b6b1b51ee9f093

SHA256
5e4540a8b45b6baae927f86d35a0958ba9279cb4671fc6218e43f2b5caa87956

SHA512
bd3b45123f041346b41a0be46b108ac123cb8b87c8634bb372f314de9b27d6ea0002e41a31ef135ae73c677464bb13277043a30eb6ce1909e2fecaf6c52120b3

Download Submit
memory/1388-12-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download
memory/1388-8-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download
memory/3228-9-0x00000000006E0000-0x00000000006F5000-memory.dmp

Filesize
84KB

Download
memory/3228-13-0x00000000006E0000-0x00000000006F5000-memory.dmp

Filesize
84KB

Download
memory/3228-18-0x00000000006E0000-0x00000000006F5000-memory.dmp

Filesize
84KB

Download
memory/3228-19-0x00000000006E0000-0x00000000006F5000-memory.dmp

Filesize
84KB

Download
memory/3228-20-0x00000000006E0000-0x00000000006F5000-memory.dmp

Filesize
84KB

Download
memory/3944-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3944-2-0x0000000000780000-0x0000000000793000-memory.dmp

Filesize
76KB

Download
memory/3944-1-0x00000000007C0000-0x00000000008C0000-memory.dmp

Filesize
1024KB

Download
memory/3944-17-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3944-16-0x0000000000780000-0x0000000000793000-memory.dmp

Filesize
76KB

Download
memory/3944-15-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads