tofsee | baaf5d81ae65db81c169c4da786d971683a1bafb848662d0202d80b0d0266d0c

Analysis

max time kernel
147s
max time network
143s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
14/08/2024, 07:31

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General

Target
9529373105174adc561ae1e09488e8a6_JaffaCakes118.exe
Size 10.9MB
Sample240814-jcv47szelc
SHA256 baaf5d81ae65db81c169c4da786d971683a1bafb848662d0202d80b0d0266d0c
MD5 9529373105174adc561ae1e09488e8a6
SHA1 37d8a3f5cacc07f043212479e5a116010e455b17
SHA512 5fab1a29fc6f6cdc13c5eba140d0b6b76efe895358aeb550aced11b2609905899ed4926a9ab02b315c5cd1b108b99640782d57a8a5108f021d032fa0128fea2a
SSDEEP 196608:Xsvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv:X
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
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
4680	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\yuuqttuq\ImagePath = "C:\\Windows\\SysWOW64\\yuuqttuq\\pnxvvluk.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-1-5-21-1194130065-3471212556-1656947724-1000\Control Panel\International\Geo\Nation	9529373105174adc561ae1e09488e8a6_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
1276	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4932	pnxvvluk.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4932 set thread context of 1276	4932	pnxvvluk.exe	104

Launches sc.exe 3 IoCs

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

pid	Process
4844	sc.exe
5028	sc.exe
220	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 queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
3620	916	WerFault.exe	83
2240	4932	WerFault.exe	98

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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	pnxvvluk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	9529373105174adc561ae1e09488e8a6_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 916 wrote to memory of 3332	916	9529373105174adc561ae1e09488e8a6_JaffaCakes118.exe	88
PID 916 wrote to memory of 3332	916	9529373105174adc561ae1e09488e8a6_JaffaCakes118.exe	88
PID 916 wrote to memory of 3332	916	9529373105174adc561ae1e09488e8a6_JaffaCakes118.exe	88
PID 916 wrote to memory of 4060	916	9529373105174adc561ae1e09488e8a6_JaffaCakes118.exe	90
PID 916 wrote to memory of 4060	916	9529373105174adc561ae1e09488e8a6_JaffaCakes118.exe	90
PID 916 wrote to memory of 4060	916	9529373105174adc561ae1e09488e8a6_JaffaCakes118.exe	90
PID 916 wrote to memory of 4844	916	9529373105174adc561ae1e09488e8a6_JaffaCakes118.exe	92
PID 916 wrote to memory of 4844	916	9529373105174adc561ae1e09488e8a6_JaffaCakes118.exe	92
PID 916 wrote to memory of 4844	916	9529373105174adc561ae1e09488e8a6_JaffaCakes118.exe	92
PID 916 wrote to memory of 5028	916	9529373105174adc561ae1e09488e8a6_JaffaCakes118.exe	94
PID 916 wrote to memory of 5028	916	9529373105174adc561ae1e09488e8a6_JaffaCakes118.exe	94
PID 916 wrote to memory of 5028	916	9529373105174adc561ae1e09488e8a6_JaffaCakes118.exe	94
PID 916 wrote to memory of 220	916	9529373105174adc561ae1e09488e8a6_JaffaCakes118.exe	96
PID 916 wrote to memory of 220	916	9529373105174adc561ae1e09488e8a6_JaffaCakes118.exe	96
PID 916 wrote to memory of 220	916	9529373105174adc561ae1e09488e8a6_JaffaCakes118.exe	96
PID 916 wrote to memory of 4680	916	9529373105174adc561ae1e09488e8a6_JaffaCakes118.exe	99
PID 916 wrote to memory of 4680	916	9529373105174adc561ae1e09488e8a6_JaffaCakes118.exe	99
PID 916 wrote to memory of 4680	916	9529373105174adc561ae1e09488e8a6_JaffaCakes118.exe	99
PID 4932 wrote to memory of 1276	4932	pnxvvluk.exe	104
PID 4932 wrote to memory of 1276	4932	pnxvvluk.exe	104
PID 4932 wrote to memory of 1276	4932	pnxvvluk.exe	104
PID 4932 wrote to memory of 1276	4932	pnxvvluk.exe	104
PID 4932 wrote to memory of 1276	4932	pnxvvluk.exe	104

C:\Users\Admin\AppData\Local\Temp\9529373105174adc561ae1e09488e8a6_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\9529373105174adc561ae1e09488e8a6_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:916
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\yuuqttuq\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3332
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pnxvvluk.exe" C:\Windows\SysWOW64\yuuqttuq\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4060
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create yuuqttuq binPath= "C:\Windows\SysWOW64\yuuqttuq\pnxvvluk.exe /d\"C:\Users\Admin\AppData\Local\Temp\9529373105174adc561ae1e09488e8a6_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4844
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description yuuqttuq "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:5028
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start yuuqttuq
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:220
- 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:4680
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 916 -s 1036
  2⤵
  - Program crash
  PID:3620

C:\Windows\SysWOW64\yuuqttuq\pnxvvluk.exe
C:\Windows\SysWOW64\yuuqttuq\pnxvvluk.exe /d"C:\Users\Admin\AppData\Local\Temp\9529373105174adc561ae1e09488e8a6_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4932
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1276
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4932 -s 512
  2⤵
  - Program crash
  PID:2240

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 916 -ip 916
1⤵
PID:1264

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 4932 -ip 4932
1⤵
PID:3488

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

pnxvvluk.exe

Path C:\Users\Admin\AppData\Local\Temp\pnxvvluk.exe
Size 11.3MB
SHA256 0b9953f4dbe165486392e20285201e88bfb227284d993fd3299516611a1f1498
MD5 8ae1d587744a0ed3e0f25646e60476ca
SHA1 c8648a31f8310581911847b530a380dbfa506954
SHA512 bce4f1a9c6ae863d2af8ee2b51aa2645637ed515aa489383ea88339db3eb1e439aab493c914aa92d94dc8ac80910d049cda48d0aaa3ae8cb961b510d5151c7bb
SSDEEP 196608:wsvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvn:w
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/916-9-0x00000000001C0000-0x00000000001D3000-memory.dmp

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memory/916-4-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/916-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

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memory/916-10-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/916-8-0x0000000000400000-0x0000000000871000-memory.dmp

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memory/916-1-0x0000000000B50000-0x0000000000C50000-memory.dmp

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memory/1276-15-0x0000000000B50000-0x0000000000B65000-memory.dmp

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memory/1276-13-0x0000000000B50000-0x0000000000B65000-memory.dmp

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memory/1276-16-0x0000000000B50000-0x0000000000B65000-memory.dmp

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memory/4932-11-0x0000000000400000-0x0000000000871000-memory.dmp

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memory/4932-12-0x0000000000400000-0x0000000000871000-memory.dmp

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memory/4932-18-0x0000000000400000-0x0000000000871000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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