tofsee | 91fb824a61a9ddb8c1f961e2f3b1acde927c129ea64c117272fbb5f25f40f91d

General

Target

91fb824a61a9ddb8c1f961e2f3b1acde927c129ea64c117272fbb5f25f40f91d.exe
Size

10.1MB
MD5

fbebf7e29e3295a4d97c825b1efd17f0
SHA1

84dbfb2b72a828c9bd7024dac9e0344f68c2c6c9
SHA256

91fb824a61a9ddb8c1f961e2f3b1acde927c129ea64c117272fbb5f25f40f91d
SHA512

f1d905a77db3160010c8aa19bdc4522b6f0900ebab5e585331f7724a30d887f6b35714f420f6a13f6a775e77b7f2c6bbf6a3387168e935f2a0e56de8d05c3a66
SSDEEP

49152:3vUWkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkn:3

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
464	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\ovhjwzml\ImagePath = "C:\\Windows\\SysWOW64\\ovhjwzml\\ogyfevgn.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-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	91fb824a61a9ddb8c1f961e2f3b1acde927c129ea64c117272fbb5f25f40f91d.exe

Deletes itself 1 IoCs

pid	Process
3464	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2828	ogyfevgn.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2828 set thread context of 3464	2828	ogyfevgn.exe	105

Launches sc.exe 3 IoCs

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

pid	Process
4040	sc.exe
2524	sc.exe
3064	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
1452	5004	WerFault.exe	82
2936	2828	WerFault.exe	96

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	svchost.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	ogyfevgn.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	91fb824a61a9ddb8c1f961e2f3b1acde927c129ea64c117272fbb5f25f40f91d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 5004 wrote to memory of 4056	5004	91fb824a61a9ddb8c1f961e2f3b1acde927c129ea64c117272fbb5f25f40f91d.exe	83
PID 5004 wrote to memory of 4056	5004	91fb824a61a9ddb8c1f961e2f3b1acde927c129ea64c117272fbb5f25f40f91d.exe	83
PID 5004 wrote to memory of 4056	5004	91fb824a61a9ddb8c1f961e2f3b1acde927c129ea64c117272fbb5f25f40f91d.exe	83
PID 5004 wrote to memory of 4820	5004	91fb824a61a9ddb8c1f961e2f3b1acde927c129ea64c117272fbb5f25f40f91d.exe	85
PID 5004 wrote to memory of 4820	5004	91fb824a61a9ddb8c1f961e2f3b1acde927c129ea64c117272fbb5f25f40f91d.exe	85
PID 5004 wrote to memory of 4820	5004	91fb824a61a9ddb8c1f961e2f3b1acde927c129ea64c117272fbb5f25f40f91d.exe	85
PID 5004 wrote to memory of 4040	5004	91fb824a61a9ddb8c1f961e2f3b1acde927c129ea64c117272fbb5f25f40f91d.exe	88
PID 5004 wrote to memory of 4040	5004	91fb824a61a9ddb8c1f961e2f3b1acde927c129ea64c117272fbb5f25f40f91d.exe	88
PID 5004 wrote to memory of 4040	5004	91fb824a61a9ddb8c1f961e2f3b1acde927c129ea64c117272fbb5f25f40f91d.exe	88
PID 5004 wrote to memory of 2524	5004	91fb824a61a9ddb8c1f961e2f3b1acde927c129ea64c117272fbb5f25f40f91d.exe	92
PID 5004 wrote to memory of 2524	5004	91fb824a61a9ddb8c1f961e2f3b1acde927c129ea64c117272fbb5f25f40f91d.exe	92
PID 5004 wrote to memory of 2524	5004	91fb824a61a9ddb8c1f961e2f3b1acde927c129ea64c117272fbb5f25f40f91d.exe	92
PID 5004 wrote to memory of 3064	5004	91fb824a61a9ddb8c1f961e2f3b1acde927c129ea64c117272fbb5f25f40f91d.exe	94
PID 5004 wrote to memory of 3064	5004	91fb824a61a9ddb8c1f961e2f3b1acde927c129ea64c117272fbb5f25f40f91d.exe	94
PID 5004 wrote to memory of 3064	5004	91fb824a61a9ddb8c1f961e2f3b1acde927c129ea64c117272fbb5f25f40f91d.exe	94
PID 5004 wrote to memory of 464	5004	91fb824a61a9ddb8c1f961e2f3b1acde927c129ea64c117272fbb5f25f40f91d.exe	100
PID 5004 wrote to memory of 464	5004	91fb824a61a9ddb8c1f961e2f3b1acde927c129ea64c117272fbb5f25f40f91d.exe	100
PID 5004 wrote to memory of 464	5004	91fb824a61a9ddb8c1f961e2f3b1acde927c129ea64c117272fbb5f25f40f91d.exe	100
PID 2828 wrote to memory of 3464	2828	ogyfevgn.exe	105
PID 2828 wrote to memory of 3464	2828	ogyfevgn.exe	105
PID 2828 wrote to memory of 3464	2828	ogyfevgn.exe	105
PID 2828 wrote to memory of 3464	2828	ogyfevgn.exe	105
PID 2828 wrote to memory of 3464	2828	ogyfevgn.exe	105

C:\Users\Admin\AppData\Local\Temp\91fb824a61a9ddb8c1f961e2f3b1acde927c129ea64c117272fbb5f25f40f91d.exe
"C:\Users\Admin\AppData\Local\Temp\91fb824a61a9ddb8c1f961e2f3b1acde927c129ea64c117272fbb5f25f40f91d.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5004
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ovhjwzml\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4056
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ogyfevgn.exe" C:\Windows\SysWOW64\ovhjwzml\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4820
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ovhjwzml binPath= "C:\Windows\SysWOW64\ovhjwzml\ogyfevgn.exe /d\"C:\Users\Admin\AppData\Local\Temp\91fb824a61a9ddb8c1f961e2f3b1acde927c129ea64c117272fbb5f25f40f91d.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4040
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ovhjwzml "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2524
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ovhjwzml
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3064
- 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:464
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5004 -s 1192
  2⤵
  - Program crash
  PID:1452

C:\Windows\SysWOW64\ovhjwzml\ogyfevgn.exe
C:\Windows\SysWOW64\ovhjwzml\ogyfevgn.exe /d"C:\Users\Admin\AppData\Local\Temp\91fb824a61a9ddb8c1f961e2f3b1acde927c129ea64c117272fbb5f25f40f91d.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2828
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3464
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2828 -s 516
  2⤵
  - Program crash
  PID:2936

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 5004 -ip 5004
1⤵
PID:388

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 2828 -ip 2828
1⤵
PID:4264

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\ogyfevgn.exe

Filesize
12.6MB

MD5
ea01de63afac8fb6f8dc50994b462055

SHA1
57cc6ef535cd2b68ccdf579bbf0989e4cd03765f

SHA256
f8a4788ec2b8d8a136339d333f0046143a3db12b502546bbf63c9d499cd89d5c

SHA512
356f8c02746a5a2dbd84bb669ef09a2ff03f9ce625f01bdf3b600d760d3319ef73acd54d747904141c20d6e2cbce7b788f9b14f915eacf3266d2e1179369c509

Download Submit
memory/2828-15-0x0000000000400000-0x0000000002DA4000-memory.dmp

Filesize
41.6MB

Download
memory/3464-11-0x0000000000610000-0x0000000000625000-memory.dmp

Filesize
84KB

Download
memory/3464-13-0x0000000000610000-0x0000000000625000-memory.dmp

Filesize
84KB

Download
memory/3464-14-0x0000000000610000-0x0000000000625000-memory.dmp

Filesize
84KB

Download
memory/5004-1-0x0000000002E00000-0x0000000002F00000-memory.dmp

Filesize
1024KB

Download
memory/5004-2-0x0000000002F30000-0x0000000002F43000-memory.dmp

Filesize
76KB

Download
memory/5004-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/5004-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/5004-9-0x0000000002F30000-0x0000000002F43000-memory.dmp

Filesize
76KB

Download
memory/5004-8-0x0000000000400000-0x0000000002DA4000-memory.dmp

Filesize
41.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads