tofsee | 3aa7557525a4ff59a8cd3aecd67c987afaa744274019f2a94ae6ac87c076cbb4

General

Target

bf36675d6c02b283f1c2586de365331a_JaffaCakes118.exe
Size

255KB
MD5

bf36675d6c02b283f1c2586de365331a
SHA1

211ee565c3a4b1f6c2e145886765fda29a0e2f82
SHA256

3aa7557525a4ff59a8cd3aecd67c987afaa744274019f2a94ae6ac87c076cbb4
SHA512

19a28b13b3f07131e5f1fb95dcefed9cf35cf9b634486e135dc6712ab4ce56a4030db95a3da09c1842bc7b02ab94c223596aa9f4a1613b9a2bb84844c43772a3
SSDEEP

6144:ZoNWDuj1aozoPz1mCO6fXuWmsQfscFIPW7z:Zhq8okPz+6/uWlQJV

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

defeatwax.ru

refabyd.info

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan 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
512	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\cvdnpnmx\ImagePath = "C:\\Windows\\SysWOW64\\cvdnpnmx\\vtiuokvl.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-1-5-21-945322488-2060912225-3527527000-1000\Control Panel\International\Geo\Nation	bf36675d6c02b283f1c2586de365331a_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
4004	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3256	vtiuokvl.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3256 set thread context of 4004	3256	vtiuokvl.exe	105

Launches sc.exe 3 IoCs

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

pid	Process
1080	sc.exe
992	sc.exe
4932	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
1932	424	WerFault.exe	83
4312	3256	WerFault.exe	99

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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bf36675d6c02b283f1c2586de365331a_JaffaCakes118.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vtiuokvl.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 424 wrote to memory of 2016	424	bf36675d6c02b283f1c2586de365331a_JaffaCakes118.exe	87
PID 424 wrote to memory of 2016	424	bf36675d6c02b283f1c2586de365331a_JaffaCakes118.exe	87
PID 424 wrote to memory of 2016	424	bf36675d6c02b283f1c2586de365331a_JaffaCakes118.exe	87
PID 424 wrote to memory of 2352	424	bf36675d6c02b283f1c2586de365331a_JaffaCakes118.exe	89
PID 424 wrote to memory of 2352	424	bf36675d6c02b283f1c2586de365331a_JaffaCakes118.exe	89
PID 424 wrote to memory of 2352	424	bf36675d6c02b283f1c2586de365331a_JaffaCakes118.exe	89
PID 424 wrote to memory of 4932	424	bf36675d6c02b283f1c2586de365331a_JaffaCakes118.exe	91
PID 424 wrote to memory of 4932	424	bf36675d6c02b283f1c2586de365331a_JaffaCakes118.exe	91
PID 424 wrote to memory of 4932	424	bf36675d6c02b283f1c2586de365331a_JaffaCakes118.exe	91
PID 424 wrote to memory of 1080	424	bf36675d6c02b283f1c2586de365331a_JaffaCakes118.exe	93
PID 424 wrote to memory of 1080	424	bf36675d6c02b283f1c2586de365331a_JaffaCakes118.exe	93
PID 424 wrote to memory of 1080	424	bf36675d6c02b283f1c2586de365331a_JaffaCakes118.exe	93
PID 424 wrote to memory of 992	424	bf36675d6c02b283f1c2586de365331a_JaffaCakes118.exe	97
PID 424 wrote to memory of 992	424	bf36675d6c02b283f1c2586de365331a_JaffaCakes118.exe	97
PID 424 wrote to memory of 992	424	bf36675d6c02b283f1c2586de365331a_JaffaCakes118.exe	97
PID 424 wrote to memory of 512	424	bf36675d6c02b283f1c2586de365331a_JaffaCakes118.exe	100
PID 424 wrote to memory of 512	424	bf36675d6c02b283f1c2586de365331a_JaffaCakes118.exe	100
PID 424 wrote to memory of 512	424	bf36675d6c02b283f1c2586de365331a_JaffaCakes118.exe	100
PID 3256 wrote to memory of 4004	3256	vtiuokvl.exe	105
PID 3256 wrote to memory of 4004	3256	vtiuokvl.exe	105
PID 3256 wrote to memory of 4004	3256	vtiuokvl.exe	105
PID 3256 wrote to memory of 4004	3256	vtiuokvl.exe	105
PID 3256 wrote to memory of 4004	3256	vtiuokvl.exe	105

C:\Users\Admin\AppData\Local\Temp\bf36675d6c02b283f1c2586de365331a_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\bf36675d6c02b283f1c2586de365331a_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:424
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\cvdnpnmx\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2016
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vtiuokvl.exe" C:\Windows\SysWOW64\cvdnpnmx\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2352
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create cvdnpnmx binPath= "C:\Windows\SysWOW64\cvdnpnmx\vtiuokvl.exe /d\"C:\Users\Admin\AppData\Local\Temp\bf36675d6c02b283f1c2586de365331a_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4932
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description cvdnpnmx "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1080
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start cvdnpnmx
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:992
- 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:512
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 424 -s 1048
  2⤵
  - Program crash
  PID:1932

C:\Windows\SysWOW64\cvdnpnmx\vtiuokvl.exe
C:\Windows\SysWOW64\cvdnpnmx\vtiuokvl.exe /d"C:\Users\Admin\AppData\Local\Temp\bf36675d6c02b283f1c2586de365331a_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3256
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4004
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3256 -s 516
  2⤵
  - Program crash
  PID:4312

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 424 -ip 424
1⤵
PID:2712

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 488 -p 3256 -ip 3256
1⤵
PID:620

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\vtiuokvl.exe

Filesize
13.1MB

MD5
5c1d6a3269a2d26210307597be20efd5

SHA1
1c1bd5b00589feaf6d5e43df84011c97abc2a78e

SHA256
a96840f764f4bb5d66962429a5bf9fb6db954c19fbabbc7fb7aa7505070e7fd1

SHA512
b7b22341d25f8be1a9910b0c2998da8a878bb89b291cc07555b7ee5449ee99646266a58fe9852b0af853f95c42c66196bc018cc75c2608c8deb3829597cdcbef

Download Submit
memory/424-14-0x00000000008E0000-0x00000000008F3000-memory.dmp

Filesize
76KB

Download
memory/424-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/424-1-0x0000000000980000-0x0000000000A80000-memory.dmp

Filesize
1024KB

Download
memory/424-2-0x00000000008E0000-0x00000000008F3000-memory.dmp

Filesize
76KB

Download
memory/424-12-0x0000000000400000-0x000000000086F000-memory.dmp

Filesize
4.4MB

Download
memory/424-15-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3256-8-0x0000000000400000-0x000000000086F000-memory.dmp

Filesize
4.4MB

Download
memory/3256-13-0x0000000000400000-0x000000000086F000-memory.dmp

Filesize
4.4MB

Download
memory/3256-11-0x0000000000400000-0x000000000086F000-memory.dmp

Filesize
4.4MB

Download
memory/4004-9-0x0000000000C60000-0x0000000000C75000-memory.dmp

Filesize
84KB

Download
memory/4004-17-0x0000000000C60000-0x0000000000C75000-memory.dmp

Filesize
84KB

Download
memory/4004-18-0x0000000000C60000-0x0000000000C75000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads