tofsee | c274406591945ec59bd87c93586861c5bfd84b825657051a55e32185a064c2cf

General

Target
c274406591945ec59bd87c93586861c5bfd84b825657051a55e32185a064c2cf.exe
Size 13.2MB
Sample261106-k9p5wsbe65
SHA256 c274406591945ec59bd87c93586861c5bfd84b825657051a55e32185a064c2cf
MD5 3ff2e0be8f99e5161723116bb1974cce
SHA1 a8bbc1b9a89b4377b5b1f88e01bd339837799a6d
SHA512 592b6994bd91eefd4fcfea36ab7a009d72ba7b07990331c100683a2e52338030bee8f569407619e0efe6f8bc5a35476a4ab074dc88151e3374b13e5a7a21c4bc
SSDEEP 49152:3Ep0Jrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvn:3l
TLSH
T1D5D6436676D86ED9D0CA0FBC09A1C42B5DECFB34043A553096D1504F98AE78A973CBB3
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
2640	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
3276	zcavpwgq.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3276 set thread context of 5544	3276	zcavpwgq.exe	101

Launches sc.exe 3 IoCs

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

pid	Process
5516	sc.exe
3164	sc.exe
2556	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
464	cmd.exe
2812	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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	zcavpwgq.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c274406591945ec59bd87c93586861c5bfd84b825657051a55e32185a064c2cf.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

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4968 wrote to memory of 464	4968	c274406591945ec59bd87c93586861c5bfd84b825657051a55e32185a064c2cf.exe	89
PID 4968 wrote to memory of 2812	4968	c274406591945ec59bd87c93586861c5bfd84b825657051a55e32185a064c2cf.exe	91
PID 4968 wrote to memory of 5516	4968	c274406591945ec59bd87c93586861c5bfd84b825657051a55e32185a064c2cf.exe	93
PID 4968 wrote to memory of 3164	4968	c274406591945ec59bd87c93586861c5bfd84b825657051a55e32185a064c2cf.exe	95
PID 4968 wrote to memory of 2556	4968	c274406591945ec59bd87c93586861c5bfd84b825657051a55e32185a064c2cf.exe	98
PID 3276 wrote to memory of 5544	3276	zcavpwgq.exe	101
PID 3276 wrote to memory of 5544	3276	zcavpwgq.exe	101
PID 4968 wrote to memory of 2640	4968	c274406591945ec59bd87c93586861c5bfd84b825657051a55e32185a064c2cf.exe	102

C:\Users\Admin\AppData\Local\Temp\c274406591945ec59bd87c93586861c5bfd84b825657051a55e32185a064c2cf.exe
"C:\Users\Admin\AppData\Local\Temp\c274406591945ec59bd87c93586861c5bfd84b825657051a55e32185a064c2cf.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4968
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ejuveyjs\
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  PID:464
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zcavpwgq.exe" C:\Windows\SysWOW64\ejuveyjs\
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  PID:2812
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ejuveyjs binPath= "C:\Windows\SysWOW64\ejuveyjs\zcavpwgq.exe /d\"C:\Users\Admin\AppData\Local\Temp\c274406591945ec59bd87c93586861c5bfd84b825657051a55e32185a064c2cf.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:5516
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ejuveyjs "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3164
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ejuveyjs
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2556
- 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:2640

C:\Windows\SysWOW64\ejuveyjs\zcavpwgq.exe
C:\Windows\SysWOW64\ejuveyjs\zcavpwgq.exe /d"C:\Users\Admin\AppData\Local\Temp\c274406591945ec59bd87c93586861c5bfd84b825657051a55e32185a064c2cf.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3276
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  PID:5544

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

Replay Monitor

Loading Replay Monitor...

Downloads

zcavpwgq.exe

Path C:\Users\Admin\AppData\Local\Temp\zcavpwgq.exe
Size 10.8MB
SHA256 04b6bd17e001c5a4edefa34b8ae23e6f17baabacc7528df1f9922fca6e88e7fb
MD5 9cc20c7df12e3de7eb09f58f8e384ad0
SHA1 93c2126849b92c1840226a06cd4f256044af0cb6
SHA512 49e9837d48b10e28eb26291a650bc40040a41e0ba2ffd6505ed33d58a7b933821bad4f1227c630d436c365ec18a50ce7303c1412c75209cbdf3a3a13bd0588fa
SSDEEP 49152:sEp0Jrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvn:sl
TLSH
T1ABB6436676D86ED9D0CA0FBC09A1C42B5DECFB34043A553096D1504F98AE78A973CBB3
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3276-5-0x0000000000400000-0x0000000000449000-memory.dmp

Download

memory/3276-9-0x0000000000400000-0x0000000000449000-memory.dmp

Download

memory/4968-0-0x0000000000400000-0x0000000000449000-memory.dmp

Download

memory/4968-10-0x0000000000400000-0x0000000000449000-memory.dmp

Download

memory/5544-6-0x0000000000CD0000-0x0000000000D19000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

Loading Replay Monitor...

Downloads