tofsee | fa13796202274817d010806ff9d36e68d00e7fb16303a81294b982eaa9c49614

General

Target
fa13796202274817d010806ff9d36e68d00e7fb16303a81294b982eaa9c49614.exe
Size 11.9MB
Sample261109-ne5tmseh34
SHA256 fa13796202274817d010806ff9d36e68d00e7fb16303a81294b982eaa9c49614
MD5 c2ee05f4b80a7f4f48bbbf55540d3ea2
SHA1 d36ea75b38e99f801a48aca7a76848e03aa66bb0
SHA512 b91fda7ea86aa92ca9084776ed1ba545660fd7d85cdd90a548c7d2be304f751018ee3d5565d66c4b83a6fe1130579ada22c43110ede2bc15aaafa1ea12597ec6
SSDEEP 49152:6Ep0Jrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrv7:6l
TLSH
T172C6436676D86ED9D0CA0FBC09A1C42B5DECFB34043A553096D1504F98AE78A973CBB3
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
1132	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
5952	ayiggwfv.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5952 set thread context of 4076	5952	ayiggwfv.exe	102

Launches sc.exe 3 IoCs

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

pid	Process
3084	sc.exe
2544	sc.exe
4600	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
4020	cmd.exe
4040	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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fa13796202274817d010806ff9d36e68d00e7fb16303a81294b982eaa9c49614.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	ayiggwfv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4460 wrote to memory of 4020	4460	fa13796202274817d010806ff9d36e68d00e7fb16303a81294b982eaa9c49614.exe	90
PID 4460 wrote to memory of 4040	4460	fa13796202274817d010806ff9d36e68d00e7fb16303a81294b982eaa9c49614.exe	92
PID 4460 wrote to memory of 3084	4460	fa13796202274817d010806ff9d36e68d00e7fb16303a81294b982eaa9c49614.exe	94
PID 4460 wrote to memory of 2544	4460	fa13796202274817d010806ff9d36e68d00e7fb16303a81294b982eaa9c49614.exe	97
PID 4460 wrote to memory of 4600	4460	fa13796202274817d010806ff9d36e68d00e7fb16303a81294b982eaa9c49614.exe	99
PID 5952 wrote to memory of 4076	5952	ayiggwfv.exe	102
PID 5952 wrote to memory of 4076	5952	ayiggwfv.exe	102
PID 4460 wrote to memory of 1132	4460	fa13796202274817d010806ff9d36e68d00e7fb16303a81294b982eaa9c49614.exe	103

C:\Users\Admin\AppData\Local\Temp\fa13796202274817d010806ff9d36e68d00e7fb16303a81294b982eaa9c49614.exe
"C:\Users\Admin\AppData\Local\Temp\fa13796202274817d010806ff9d36e68d00e7fb16303a81294b982eaa9c49614.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4460
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rajbcqnl\
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  PID:4020
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ayiggwfv.exe" C:\Windows\SysWOW64\rajbcqnl\
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  PID:4040
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create rajbcqnl binPath= "C:\Windows\SysWOW64\rajbcqnl\ayiggwfv.exe /d\"C:\Users\Admin\AppData\Local\Temp\fa13796202274817d010806ff9d36e68d00e7fb16303a81294b982eaa9c49614.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3084
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description rajbcqnl "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2544
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start rajbcqnl
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4600
- 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:1132

C:\Windows\SysWOW64\rajbcqnl\ayiggwfv.exe
C:\Windows\SysWOW64\rajbcqnl\ayiggwfv.exe /d"C:\Users\Admin\AppData\Local\Temp\fa13796202274817d010806ff9d36e68d00e7fb16303a81294b982eaa9c49614.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5952
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  PID:4076

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k GPSvcGroup
1⤵
PID:2940

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

ayiggwfv.exe

Path C:\Users\Admin\AppData\Local\Temp\ayiggwfv.exe
Size 11.2MB
SHA256 03d005ab795f0eb117d8a33dd4e831d50426fd690efb8df0906d7dfec218baf3
MD5 5790d8c0d07e7ea054b715db7b66716e
SHA1 b959a9911ad2354fc9279811b9bc572e77b99bb0
SHA512 7028eacdc394f3b2cdff6a2b1309e43a92428e3e25f13b0269ef0f9697fddd6961b406edd39e7555bbf7328323b76fd1463a910d59ea71c9de70b2c1badcf30b
SSDEEP 49152:3Ep0Jrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvrvf:3l
TLSH
T1C8C6436676D86ED9D0CA0FBC09A1C42B5DECFB34043A553096D1504F98AE78A973CBB3
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4076-6-0x0000000001040000-0x0000000001089000-memory.dmp

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memory/4460-0-0x0000000000400000-0x0000000000449000-memory.dmp

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memory/4460-10-0x0000000000400000-0x0000000000449000-memory.dmp

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memory/5952-5-0x0000000000400000-0x0000000000449000-memory.dmp

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memory/5952-9-0x0000000000400000-0x0000000000449000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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