tofsee | 20cc06d671ab83cddc766d05e4395cfc0d198d78d259779ed8cab81d3cbe253c

General

Target
20cc06d671ab83cddc766d05e4395cfc0d198d78d259779ed8cab81d3cbe253c.exe
Size 11.0MB
Sample261109-294fysst8m
SHA256 20cc06d671ab83cddc766d05e4395cfc0d198d78d259779ed8cab81d3cbe253c
MD5 5a7ed06a13222d572d9f9468ff95bafb
SHA1 17f147936b4af16b575c38adf18cb77ce9136c1d
SHA512 0cd4c4145865b42f0cbd8452005550ac1fb71834bee996145d12873162e77c2873b61fc03b5cc0dc158fd8186e38b7a4e9075832eba955df4e3df8ad7be464be
SSDEEP 49152:QlpGfrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvn:QO
TLSH
T129C6436676D86ED9D0CA0FBC09A1C42B5DECFB34043A553096D1504F98AE78A973CBB3
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

defense_evasion discovery execution tofsee persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

defeatwax.ru
refabyd.info

Signatures

Family: Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee

Modifies Windows Firewall 2 TTPs 1 IoCs

defense_evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
1288	netsh.exe

Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002

Executes dropped EXE 1 IoCs

pid	Process
5584	qxjwfstn.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5584 set thread context of 3952	5584	qxjwfstn.exe	100

Launches sc.exe 3 IoCs

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

pid	Process
3276	sc.exe
4764	sc.exe
4240	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

Executes a command shell one-liner 1 TTPs 2 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
4604	cmd.exe
4160	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 8 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	20cc06d671ab83cddc766d05e4395cfc0d198d78d259779ed8cab81d3cbe253c.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	qxjwfstn.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2448 wrote to memory of 4604	2448	20cc06d671ab83cddc766d05e4395cfc0d198d78d259779ed8cab81d3cbe253c.exe	89
PID 2448 wrote to memory of 4160	2448	20cc06d671ab83cddc766d05e4395cfc0d198d78d259779ed8cab81d3cbe253c.exe	91
PID 2448 wrote to memory of 3276	2448	20cc06d671ab83cddc766d05e4395cfc0d198d78d259779ed8cab81d3cbe253c.exe	93
PID 2448 wrote to memory of 4764	2448	20cc06d671ab83cddc766d05e4395cfc0d198d78d259779ed8cab81d3cbe253c.exe	95
PID 2448 wrote to memory of 4240	2448	20cc06d671ab83cddc766d05e4395cfc0d198d78d259779ed8cab81d3cbe253c.exe	97
PID 5584 wrote to memory of 3952	5584	qxjwfstn.exe	100
PID 5584 wrote to memory of 3952	5584	qxjwfstn.exe	100
PID 2448 wrote to memory of 1288	2448	20cc06d671ab83cddc766d05e4395cfc0d198d78d259779ed8cab81d3cbe253c.exe	102

C:\Users\Admin\AppData\Local\Temp\20cc06d671ab83cddc766d05e4395cfc0d198d78d259779ed8cab81d3cbe253c.exe
"C:\Users\Admin\AppData\Local\Temp\20cc06d671ab83cddc766d05e4395cfc0d198d78d259779ed8cab81d3cbe253c.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2448
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lqfvbswg\
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  PID:4604
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qxjwfstn.exe" C:\Windows\SysWOW64\lqfvbswg\
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  PID:4160
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create lqfvbswg binPath= "C:\Windows\SysWOW64\lqfvbswg\qxjwfstn.exe /d\"C:\Users\Admin\AppData\Local\Temp\20cc06d671ab83cddc766d05e4395cfc0d198d78d259779ed8cab81d3cbe253c.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3276
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description lqfvbswg "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4764
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start lqfvbswg
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4240
- 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:1288

C:\Windows\SysWOW64\lqfvbswg\qxjwfstn.exe
C:\Windows\SysWOW64\lqfvbswg\qxjwfstn.exe /d"C:\Users\Admin\AppData\Local\Temp\20cc06d671ab83cddc766d05e4395cfc0d198d78d259779ed8cab81d3cbe253c.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5584
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  PID:3952

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

System Services

1

T1569

Service Execution

1

T1569.002

Persistence

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

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

1

T1562.004

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

qxjwfstn.exe

Path C:\Users\Admin\AppData\Local\Temp\qxjwfstn.exe
Size 11.5MB
SHA256 cace1cc125524c53dff4f68db4a5bf0bb3a25b797b9fa2b6c9c37f72fb556782
MD5 3a64c48e0558cabfa63ed52815154b5f
SHA1 b39a2be540137f265cf75ee6a633b63625c2edfc
SHA512 e35eae86845c8b5cc3389ce4fcd903c98372df39112ba5057bfaeaeef784becb54cc6104a613847c589cf119a80f6c8134ac830cfab8e2fdb7049981cf656a0a
SSDEEP 49152:hlpGfrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvH:hO
TLSH
T1EBC6436676D86ED9D0CA0FBC09A1C42B5DECFB34043A553096D1504F98AE78A973CBB3
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2448-0-0x0000000000400000-0x0000000000449000-memory.dmp

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memory/2448-10-0x0000000000400000-0x0000000000449000-memory.dmp

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memory/3952-6-0x0000000000C10000-0x0000000000C59000-memory.dmp

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memory/5584-5-0x0000000000400000-0x0000000000449000-memory.dmp

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memory/5584-9-0x0000000000400000-0x0000000000449000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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