tofsee | f497600b793c965a69df6cbc73af3df664b635fd098e463fab3d9badf0dccea4

General

Target

f497600b793c965a69df6cbc73af3df664b635fd098e463fab3d9badf0dccea4.exe
Size

11.0MB
MD5

3a73e3f5ff0ad1e222cac36e03b9fe66
SHA1

155126c64e86e8f6830dd377417bd750b3f0b6e3
SHA256

f497600b793c965a69df6cbc73af3df664b635fd098e463fab3d9badf0dccea4
SHA512

b97bd61b89eafacf4e652a8f0ab9b284018d18911f4a5604a4e1ff3d16cbb4d1345265ee226d0dd26d1690fe4e3056ed682c659207b7a60ccd1a0e9ec73abc1c
SSDEEP

49152:wNxtFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFg:WO

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

quadoil.ru

lakeflex.ru

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

pid	Process
2920	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\vdwhgrwl\ImagePath = "C:\\Windows\\SysWOW64\\vdwhgrwl\\iaszypah.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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	f497600b793c965a69df6cbc73af3df664b635fd098e463fab3d9badf0dccea4.exe

Deletes itself 1 IoCs

pid	Process
1480	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2380	iaszypah.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2380 set thread context of 1480	2380	iaszypah.exe	108

Launches sc.exe 3 IoCs

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

pid	Process
3892	sc.exe
2272	sc.exe
440	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

Program crash 2 IoCs

pid	pid_target	Process	procid_target
2544	3576	WerFault.exe	82
4288	2380	WerFault.exe	100

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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	iaszypah.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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f497600b793c965a69df6cbc73af3df664b635fd098e463fab3d9badf0dccea4.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3576 wrote to memory of 3208	3576	f497600b793c965a69df6cbc73af3df664b635fd098e463fab3d9badf0dccea4.exe	86
PID 3576 wrote to memory of 3208	3576	f497600b793c965a69df6cbc73af3df664b635fd098e463fab3d9badf0dccea4.exe	86
PID 3576 wrote to memory of 3208	3576	f497600b793c965a69df6cbc73af3df664b635fd098e463fab3d9badf0dccea4.exe	86
PID 3576 wrote to memory of 4596	3576	f497600b793c965a69df6cbc73af3df664b635fd098e463fab3d9badf0dccea4.exe	92
PID 3576 wrote to memory of 4596	3576	f497600b793c965a69df6cbc73af3df664b635fd098e463fab3d9badf0dccea4.exe	92
PID 3576 wrote to memory of 4596	3576	f497600b793c965a69df6cbc73af3df664b635fd098e463fab3d9badf0dccea4.exe	92
PID 3576 wrote to memory of 3892	3576	f497600b793c965a69df6cbc73af3df664b635fd098e463fab3d9badf0dccea4.exe	94
PID 3576 wrote to memory of 3892	3576	f497600b793c965a69df6cbc73af3df664b635fd098e463fab3d9badf0dccea4.exe	94
PID 3576 wrote to memory of 3892	3576	f497600b793c965a69df6cbc73af3df664b635fd098e463fab3d9badf0dccea4.exe	94
PID 3576 wrote to memory of 2272	3576	f497600b793c965a69df6cbc73af3df664b635fd098e463fab3d9badf0dccea4.exe	96
PID 3576 wrote to memory of 2272	3576	f497600b793c965a69df6cbc73af3df664b635fd098e463fab3d9badf0dccea4.exe	96
PID 3576 wrote to memory of 2272	3576	f497600b793c965a69df6cbc73af3df664b635fd098e463fab3d9badf0dccea4.exe	96
PID 3576 wrote to memory of 440	3576	f497600b793c965a69df6cbc73af3df664b635fd098e463fab3d9badf0dccea4.exe	98
PID 3576 wrote to memory of 440	3576	f497600b793c965a69df6cbc73af3df664b635fd098e463fab3d9badf0dccea4.exe	98
PID 3576 wrote to memory of 440	3576	f497600b793c965a69df6cbc73af3df664b635fd098e463fab3d9badf0dccea4.exe	98
PID 3576 wrote to memory of 2920	3576	f497600b793c965a69df6cbc73af3df664b635fd098e463fab3d9badf0dccea4.exe	101
PID 3576 wrote to memory of 2920	3576	f497600b793c965a69df6cbc73af3df664b635fd098e463fab3d9badf0dccea4.exe	101
PID 3576 wrote to memory of 2920	3576	f497600b793c965a69df6cbc73af3df664b635fd098e463fab3d9badf0dccea4.exe	101
PID 2380 wrote to memory of 1480	2380	iaszypah.exe	108
PID 2380 wrote to memory of 1480	2380	iaszypah.exe	108
PID 2380 wrote to memory of 1480	2380	iaszypah.exe	108
PID 2380 wrote to memory of 1480	2380	iaszypah.exe	108
PID 2380 wrote to memory of 1480	2380	iaszypah.exe	108

C:\Users\Admin\AppData\Local\Temp\f497600b793c965a69df6cbc73af3df664b635fd098e463fab3d9badf0dccea4.exe
"C:\Users\Admin\AppData\Local\Temp\f497600b793c965a69df6cbc73af3df664b635fd098e463fab3d9badf0dccea4.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3576
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vdwhgrwl\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3208
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\iaszypah.exe" C:\Windows\SysWOW64\vdwhgrwl\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4596
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create vdwhgrwl binPath= "C:\Windows\SysWOW64\vdwhgrwl\iaszypah.exe /d\"C:\Users\Admin\AppData\Local\Temp\f497600b793c965a69df6cbc73af3df664b635fd098e463fab3d9badf0dccea4.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3892
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description vdwhgrwl "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2272
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start vdwhgrwl
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:440
- 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:2920
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3576 -s 1048
  2⤵
  - Program crash
  PID:2544

C:\Windows\SysWOW64\vdwhgrwl\iaszypah.exe
C:\Windows\SysWOW64\vdwhgrwl\iaszypah.exe /d"C:\Users\Admin\AppData\Local\Temp\f497600b793c965a69df6cbc73af3df664b635fd098e463fab3d9badf0dccea4.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2380
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1480
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2380 -s 520
  2⤵
  - Program crash
  PID:4288

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 3576 -ip 3576
1⤵
PID:1544

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 2380 -ip 2380
1⤵
PID:2412

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\iaszypah.exe

Filesize
10.9MB

MD5
1ab7a87a54a66e22ac16924d831065e8

SHA1
31440b5fdff1bd2417e0db41fa46b20de562290d

SHA256
ba4dd84c028fd3cc5a763342133b4ae92414aeb19b9ffdd837f7a8a94b57ddf0

SHA512
a8df907dda36e512e44b63fa8da32cbc7df4d18001f9169b3b95c8bdf549fdb77cab07417f80252a5de38e3876c8083d8ddf3bc88396d017bf4a083fa5649beb

Download Submit
memory/1480-10-0x0000000000E70000-0x0000000000E85000-memory.dmp

Filesize
84KB

Download
memory/1480-12-0x0000000000E70000-0x0000000000E85000-memory.dmp

Filesize
84KB

Download
memory/1480-13-0x0000000000E70000-0x0000000000E85000-memory.dmp

Filesize
84KB

Download
memory/2380-14-0x0000000000400000-0x0000000002F06000-memory.dmp

Filesize
43.0MB

Download
memory/3576-0-0x0000000002FA0000-0x0000000002FAD000-memory.dmp

Filesize
52KB

Download
memory/3576-1-0x0000000004C70000-0x0000000004C83000-memory.dmp

Filesize
76KB

Download
memory/3576-2-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3576-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3576-8-0x0000000004C70000-0x0000000004C83000-memory.dmp

Filesize
76KB

Download
memory/3576-7-0x0000000002FA0000-0x0000000002FAD000-memory.dmp

Filesize
52KB

Download
memory/3576-6-0x0000000000400000-0x0000000002F06000-memory.dmp

Filesize
43.0MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads