tofsee | 1664045584a46d45955ee6a8d0d47df589837c609232653413c515fc3e4bca62

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
31/12/2024, 03:36

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General

Target
JaffaCakes118_02dc80cd9cf3cff7d95588655037c2f2.exe
Size 11.7MB
Sample241231-d565aavrds
SHA256 1664045584a46d45955ee6a8d0d47df589837c609232653413c515fc3e4bca62
MD5 02dc80cd9cf3cff7d95588655037c2f2
SHA1 af16e4d5e970f82047ddb1bcf79b7fea1d1883a5
SHA512 cd97ca0c06a2d584b1417173db00def9b70dcfec97e699648bd0fec4f6378b93915dfa2b8abc5bbe211dbcbb92992ee6337755de03c1fcc8da06763e8f5d2123
SSDEEP 49152:+xYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYD:+
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

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
4040	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\zvsbncon\ImagePath = "C:\\Windows\\SysWOW64\\zvsbncon\\vnfmlcnu.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-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	JaffaCakes118_02dc80cd9cf3cff7d95588655037c2f2.exe

Deletes itself 1 IoCs

pid	Process
3616	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2388	vnfmlcnu.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2388 set thread context of 3616	2388	vnfmlcnu.exe	98

Launches sc.exe 3 IoCs

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

pid	Process
3988	sc.exe
2904	sc.exe
1252	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
3748	224	WerFault.exe	81
1108	2388	WerFault.exe	92

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	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	vnfmlcnu.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_02dc80cd9cf3cff7d95588655037c2f2.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	netsh.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 224 wrote to memory of 4780	224	JaffaCakes118_02dc80cd9cf3cff7d95588655037c2f2.exe	82
PID 224 wrote to memory of 4780	224	JaffaCakes118_02dc80cd9cf3cff7d95588655037c2f2.exe	82
PID 224 wrote to memory of 4780	224	JaffaCakes118_02dc80cd9cf3cff7d95588655037c2f2.exe	82
PID 224 wrote to memory of 4852	224	JaffaCakes118_02dc80cd9cf3cff7d95588655037c2f2.exe	84
PID 224 wrote to memory of 4852	224	JaffaCakes118_02dc80cd9cf3cff7d95588655037c2f2.exe	84
PID 224 wrote to memory of 4852	224	JaffaCakes118_02dc80cd9cf3cff7d95588655037c2f2.exe	84
PID 224 wrote to memory of 3988	224	JaffaCakes118_02dc80cd9cf3cff7d95588655037c2f2.exe	86
PID 224 wrote to memory of 3988	224	JaffaCakes118_02dc80cd9cf3cff7d95588655037c2f2.exe	86
PID 224 wrote to memory of 3988	224	JaffaCakes118_02dc80cd9cf3cff7d95588655037c2f2.exe	86
PID 224 wrote to memory of 2904	224	JaffaCakes118_02dc80cd9cf3cff7d95588655037c2f2.exe	88
PID 224 wrote to memory of 2904	224	JaffaCakes118_02dc80cd9cf3cff7d95588655037c2f2.exe	88
PID 224 wrote to memory of 2904	224	JaffaCakes118_02dc80cd9cf3cff7d95588655037c2f2.exe	88
PID 224 wrote to memory of 1252	224	JaffaCakes118_02dc80cd9cf3cff7d95588655037c2f2.exe	90
PID 224 wrote to memory of 1252	224	JaffaCakes118_02dc80cd9cf3cff7d95588655037c2f2.exe	90
PID 224 wrote to memory of 1252	224	JaffaCakes118_02dc80cd9cf3cff7d95588655037c2f2.exe	90
PID 224 wrote to memory of 4040	224	JaffaCakes118_02dc80cd9cf3cff7d95588655037c2f2.exe	93
PID 224 wrote to memory of 4040	224	JaffaCakes118_02dc80cd9cf3cff7d95588655037c2f2.exe	93
PID 224 wrote to memory of 4040	224	JaffaCakes118_02dc80cd9cf3cff7d95588655037c2f2.exe	93
PID 2388 wrote to memory of 3616	2388	vnfmlcnu.exe	98
PID 2388 wrote to memory of 3616	2388	vnfmlcnu.exe	98
PID 2388 wrote to memory of 3616	2388	vnfmlcnu.exe	98
PID 2388 wrote to memory of 3616	2388	vnfmlcnu.exe	98
PID 2388 wrote to memory of 3616	2388	vnfmlcnu.exe	98

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_02dc80cd9cf3cff7d95588655037c2f2.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_02dc80cd9cf3cff7d95588655037c2f2.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:224
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zvsbncon\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4780
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vnfmlcnu.exe" C:\Windows\SysWOW64\zvsbncon\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4852
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create zvsbncon binPath= "C:\Windows\SysWOW64\zvsbncon\vnfmlcnu.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_02dc80cd9cf3cff7d95588655037c2f2.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3988
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description zvsbncon "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2904
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start zvsbncon
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1252
- 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:4040
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 224 -s 1188
  2⤵
  - Program crash
  PID:3748

C:\Windows\SysWOW64\zvsbncon\vnfmlcnu.exe
C:\Windows\SysWOW64\zvsbncon\vnfmlcnu.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_02dc80cd9cf3cff7d95588655037c2f2.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2388
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3616
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2388 -s 520
  2⤵
  - Program crash
  PID:1108

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 224 -ip 224
1⤵
PID:2704

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 2388 -ip 2388
1⤵
PID:4472

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

T1569

Service Execution

T1569.002

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

vnfmlcnu.exe

Path C:\Users\Admin\AppData\Local\Temp\vnfmlcnu.exe
Size 10.9MB
SHA256 eac9a6c82c5e6685f429aaaa6cbd8f845c0cfa692f05579e1cee6620387d040a
MD5 58900c71f219092963e85da2542a7ccb
SHA1 1cfd28f4c9f7ff11cc4d28cc65778b32213a2bdd
SHA512 d391334dbebedf8fb1440895e152be9445a145dcb60eed8601c7663965284a4fa9bef50de0ff893fa4938c0383cd52fb5f8bece028689f76156db1c9022b2b43
SSDEEP 49152:+xYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYf:+
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/224-1-0x0000000001960000-0x0000000001A60000-memory.dmp

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memory/224-2-0x0000000003400000-0x0000000003413000-memory.dmp

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memory/224-3-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/224-9-0x0000000003400000-0x0000000003413000-memory.dmp

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memory/224-10-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/224-8-0x0000000000400000-0x00000000016BC000-memory.dmp

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memory/2388-14-0x0000000000400000-0x00000000016BC000-memory.dmp

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memory/2388-17-0x0000000000400000-0x00000000016BC000-memory.dmp

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memory/3616-13-0x00000000010C0000-0x00000000010D5000-memory.dmp

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memory/3616-11-0x00000000010C0000-0x00000000010D5000-memory.dmp

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memory/3616-15-0x00000000010C0000-0x00000000010D5000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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