tofsee | 88f3d40feec95d20183876907c7d0588b1cb2da778fbad1b698ee2baa8126b90

Analysis

max time kernel
150s
max time network
143s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
22/12/2024, 09:39

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General

Target
JaffaCakes118_88f3d40feec95d20183876907c7d0588b1cb2da778fbad1b698ee2baa8126b90.exe
Size 257KB
Sample241222-lms4pstlan
SHA256 88f3d40feec95d20183876907c7d0588b1cb2da778fbad1b698ee2baa8126b90
MD5 adcb18a3e4453106ece75a6f10668aca
SHA1 80ac8879cb657167b740fd9cc92457cb4b911f8e
SHA512 2965869d8a4305cc852f229a7d320a5fad21cd06739881183ff1c7ca261f1ddcb4c72f3c248e9f5afe34acb14bcb0b4bfd099b570029b2eb35af9293bc4b20d7
SSDEEP 6144:vv9dBGUFJFctQpYMCbTh3Sew3+Ubw9koXpDCoIK:v1rLFJFdpMZSJb0JDIK
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

defeatwax.ru
refabyd.info

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
3312	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\lritfyy\ImagePath = "C:\\Windows\\SysWOW64\\lritfyy\\bvrxiskq.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_88f3d40feec95d20183876907c7d0588b1cb2da778fbad1b698ee2baa8126b90.exe

Deletes itself 1 IoCs

pid	Process
3700	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2248	bvrxiskq.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2248 set thread context of 3700	2248	bvrxiskq.exe	98

Launches sc.exe 3 IoCs

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

pid	Process
2952	sc.exe
4800	sc.exe
2888	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
1344	1764	WerFault.exe	81
240	2248	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	netsh.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	sc.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	bvrxiskq.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_88f3d40feec95d20183876907c7d0588b1cb2da778fbad1b698ee2baa8126b90.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1764 wrote to memory of 3004	1764	JaffaCakes118_88f3d40feec95d20183876907c7d0588b1cb2da778fbad1b698ee2baa8126b90.exe	82
PID 1764 wrote to memory of 3004	1764	JaffaCakes118_88f3d40feec95d20183876907c7d0588b1cb2da778fbad1b698ee2baa8126b90.exe	82
PID 1764 wrote to memory of 3004	1764	JaffaCakes118_88f3d40feec95d20183876907c7d0588b1cb2da778fbad1b698ee2baa8126b90.exe	82
PID 1764 wrote to memory of 3092	1764	JaffaCakes118_88f3d40feec95d20183876907c7d0588b1cb2da778fbad1b698ee2baa8126b90.exe	84
PID 1764 wrote to memory of 3092	1764	JaffaCakes118_88f3d40feec95d20183876907c7d0588b1cb2da778fbad1b698ee2baa8126b90.exe	84
PID 1764 wrote to memory of 3092	1764	JaffaCakes118_88f3d40feec95d20183876907c7d0588b1cb2da778fbad1b698ee2baa8126b90.exe	84
PID 1764 wrote to memory of 2888	1764	JaffaCakes118_88f3d40feec95d20183876907c7d0588b1cb2da778fbad1b698ee2baa8126b90.exe	86
PID 1764 wrote to memory of 2888	1764	JaffaCakes118_88f3d40feec95d20183876907c7d0588b1cb2da778fbad1b698ee2baa8126b90.exe	86
PID 1764 wrote to memory of 2888	1764	JaffaCakes118_88f3d40feec95d20183876907c7d0588b1cb2da778fbad1b698ee2baa8126b90.exe	86
PID 1764 wrote to memory of 2952	1764	JaffaCakes118_88f3d40feec95d20183876907c7d0588b1cb2da778fbad1b698ee2baa8126b90.exe	88
PID 1764 wrote to memory of 2952	1764	JaffaCakes118_88f3d40feec95d20183876907c7d0588b1cb2da778fbad1b698ee2baa8126b90.exe	88
PID 1764 wrote to memory of 2952	1764	JaffaCakes118_88f3d40feec95d20183876907c7d0588b1cb2da778fbad1b698ee2baa8126b90.exe	88
PID 1764 wrote to memory of 4800	1764	JaffaCakes118_88f3d40feec95d20183876907c7d0588b1cb2da778fbad1b698ee2baa8126b90.exe	90
PID 1764 wrote to memory of 4800	1764	JaffaCakes118_88f3d40feec95d20183876907c7d0588b1cb2da778fbad1b698ee2baa8126b90.exe	90
PID 1764 wrote to memory of 4800	1764	JaffaCakes118_88f3d40feec95d20183876907c7d0588b1cb2da778fbad1b698ee2baa8126b90.exe	90
PID 1764 wrote to memory of 3312	1764	JaffaCakes118_88f3d40feec95d20183876907c7d0588b1cb2da778fbad1b698ee2baa8126b90.exe	93
PID 1764 wrote to memory of 3312	1764	JaffaCakes118_88f3d40feec95d20183876907c7d0588b1cb2da778fbad1b698ee2baa8126b90.exe	93
PID 1764 wrote to memory of 3312	1764	JaffaCakes118_88f3d40feec95d20183876907c7d0588b1cb2da778fbad1b698ee2baa8126b90.exe	93
PID 2248 wrote to memory of 3700	2248	bvrxiskq.exe	98
PID 2248 wrote to memory of 3700	2248	bvrxiskq.exe	98
PID 2248 wrote to memory of 3700	2248	bvrxiskq.exe	98
PID 2248 wrote to memory of 3700	2248	bvrxiskq.exe	98
PID 2248 wrote to memory of 3700	2248	bvrxiskq.exe	98

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_88f3d40feec95d20183876907c7d0588b1cb2da778fbad1b698ee2baa8126b90.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_88f3d40feec95d20183876907c7d0588b1cb2da778fbad1b698ee2baa8126b90.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1764
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lritfyy\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3004
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bvrxiskq.exe" C:\Windows\SysWOW64\lritfyy\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3092
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create lritfyy binPath= "C:\Windows\SysWOW64\lritfyy\bvrxiskq.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_88f3d40feec95d20183876907c7d0588b1cb2da778fbad1b698ee2baa8126b90.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2888
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description lritfyy "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2952
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start lritfyy
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4800
- 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:3312
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1764 -s 1236
  2⤵
  - Program crash
  PID:1344

C:\Windows\SysWOW64\lritfyy\bvrxiskq.exe
C:\Windows\SysWOW64\lritfyy\bvrxiskq.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_88f3d40feec95d20183876907c7d0588b1cb2da778fbad1b698ee2baa8126b90.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2248
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3700
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2248 -s 516
  2⤵
  - Program crash
  PID:240

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 1764 -ip 1764
1⤵
PID:1256

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 492 -p 2248 -ip 2248
1⤵
PID:5064

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

bvrxiskq.exe

Path C:\Users\Admin\AppData\Local\Temp\bvrxiskq.exe
Size 14.2MB
SHA256 673c77d157185050861d3a4df5a3ddb21c528986adc5834366bf6523906e52c6
MD5 9e7c3bc1ec6251fa9b25bc0410e3fe6b
SHA1 2cb866920a09b42aaed2688a589e6ed9c124cbc8
SHA512 60e95c467fd76ef11382996081fbabec6b7fe4d848376e073081162d4735630c8533c0d4b48f70ad634845725d730c67bf805104178f2e83a951f1eda1188414
SSDEEP 196608:Z4TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTH:Z
MD5 SHA1 SHA512 SSDEEP

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memory/1764-8-0x0000000000400000-0x0000000000870000-memory.dmp

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memory/1764-4-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/1764-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

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memory/1764-9-0x00000000001C0000-0x00000000001D3000-memory.dmp

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memory/1764-10-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/1764-1-0x0000000000940000-0x0000000000A40000-memory.dmp

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memory/2248-11-0x0000000000400000-0x0000000000870000-memory.dmp

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memory/2248-15-0x0000000000400000-0x0000000000870000-memory.dmp

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memory/2248-12-0x0000000000400000-0x0000000000870000-memory.dmp

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memory/2248-19-0x0000000000400000-0x0000000000870000-memory.dmp

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memory/3700-13-0x00000000006A0000-0x00000000006B5000-memory.dmp

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memory/3700-16-0x00000000006A0000-0x00000000006B5000-memory.dmp

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memory/3700-17-0x00000000006A0000-0x00000000006B5000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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