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

Windows security bypass 2 TTPs 1 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\wyszsxks = "0"	svchost.exe

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

2592 netsh.exe

pid	process
2592	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\wyszsxks\ImagePath = "C:\\Windows\\SysWOW64\\wyszsxks\\juzzdufg.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

1528 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

juzzdufg.exe

pid process

2576 juzzdufg.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

juzzdufg.exe

description pid process target process

PID 2576 set thread context of 1528 2576 juzzdufg.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

2736 sc.exe
2812 sc.exe
2624 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
1528	svchost.exe

pid	process
2576	juzzdufg.exe

description	pid	process	target process
PID 2576 set thread context of 1528	2576	juzzdufg.exe	svchost.exe

pid	process
2736	sc.exe
2812	sc.exe
2624	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

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:

sc.exeb41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.execmd.exesc.exesc.exenetsh.exejuzzdufg.exesvchost.execmd.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.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	sc.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	juzzdufg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exejuzzdufg.exe

description	pid	process	target process
PID 2176 wrote to memory of 2792	2176	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	cmd.exe
PID 2176 wrote to memory of 2792	2176	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	cmd.exe
PID 2176 wrote to memory of 2792	2176	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	cmd.exe
PID 2176 wrote to memory of 2792	2176	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	cmd.exe
PID 2176 wrote to memory of 2960	2176	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	cmd.exe
PID 2176 wrote to memory of 2960	2176	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	cmd.exe
PID 2176 wrote to memory of 2960	2176	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	cmd.exe
PID 2176 wrote to memory of 2960	2176	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	cmd.exe
PID 2176 wrote to memory of 2736	2176	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	sc.exe
PID 2176 wrote to memory of 2736	2176	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	sc.exe
PID 2176 wrote to memory of 2736	2176	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	sc.exe
PID 2176 wrote to memory of 2736	2176	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	sc.exe
PID 2176 wrote to memory of 2812	2176	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	sc.exe
PID 2176 wrote to memory of 2812	2176	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	sc.exe
PID 2176 wrote to memory of 2812	2176	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	sc.exe
PID 2176 wrote to memory of 2812	2176	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	sc.exe
PID 2176 wrote to memory of 2624	2176	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	sc.exe
PID 2176 wrote to memory of 2624	2176	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	sc.exe
PID 2176 wrote to memory of 2624	2176	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	sc.exe
PID 2176 wrote to memory of 2624	2176	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	sc.exe
PID 2176 wrote to memory of 2592	2176	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	netsh.exe
PID 2176 wrote to memory of 2592	2176	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	netsh.exe
PID 2176 wrote to memory of 2592	2176	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	netsh.exe
PID 2176 wrote to memory of 2592	2176	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	netsh.exe
PID 2576 wrote to memory of 1528	2576	juzzdufg.exe	svchost.exe
PID 2576 wrote to memory of 1528	2576	juzzdufg.exe	svchost.exe
PID 2576 wrote to memory of 1528	2576	juzzdufg.exe	svchost.exe
PID 2576 wrote to memory of 1528	2576	juzzdufg.exe	svchost.exe
PID 2576 wrote to memory of 1528	2576	juzzdufg.exe	svchost.exe
PID 2576 wrote to memory of 1528	2576	juzzdufg.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe
"C:\Users\Admin\AppData\Local\Temp\b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2176
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wyszsxks\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2792
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\juzzdufg.exe" C:\Windows\SysWOW64\wyszsxks\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2960
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create wyszsxks binPath= "C:\Windows\SysWOW64\wyszsxks\juzzdufg.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:2736
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description wyszsxks "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2812
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start wyszsxks
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2624
- 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:2592

C:\Windows\SysWOW64\wyszsxks\juzzdufg.exe
C:\Windows\SysWOW64\wyszsxks\juzzdufg.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:2576
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1528

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

2

T1562

Disable or Modify System Firewall

1

T1562.004

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

System Information Discovery

1

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\juzzdufg.exe

Filesize
13.7MB

MD5
9e0053add54c26d02c5060d73202c9a6

SHA1
04590a54cfd7350a302a6f312335479c7263b079

SHA256
cec3c552d9b46411d58b52c474817bb538c4994a615250aace71f8f1bd1d5325

SHA512
ba5017c503f9d42e4aeb0f700004810a83c36f06bd07bac38b3d4622bbcf2bb940cdcb0803a77c1e5630467809b6c105a718bc409425c61942f00e4dbbeb7b3c

Download Submit
memory/1528-16-0x0000000000100000-0x0000000000115000-memory.dmp

Filesize
84KB

Download
memory/1528-11-0x0000000000100000-0x0000000000115000-memory.dmp

Filesize
84KB

Download
memory/1528-14-0x0000000000100000-0x0000000000115000-memory.dmp

Filesize
84KB

Download
memory/1528-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1528-18-0x0000000000100000-0x0000000000115000-memory.dmp

Filesize
84KB

Download
memory/2176-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2176-2-0x00000000002B0000-0x00000000002C3000-memory.dmp

Filesize
76KB

Download
memory/2176-7-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download
memory/2176-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2176-8-0x00000000002B0000-0x00000000002C3000-memory.dmp

Filesize
76KB

Download
memory/2176-1-0x0000000000560000-0x0000000000660000-memory.dmp

Filesize
1024KB

Download
memory/2576-17-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads