tofsee | 8f4455c865efb65d8ff1395429873ebadb7f52e44da1398fa8ea6ee3e9cc0457

Analysis

max time kernel
147s
max time network
147s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
16/12/2024, 04:02

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General

Target

f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe
Size

10.4MB
MD5

f7337c874dc52cb9c05855846b4cc0c2
SHA1

557ea34cad7f5de0f875220ea32f1891392362ae
SHA256

8f4455c865efb65d8ff1395429873ebadb7f52e44da1398fa8ea6ee3e9cc0457
SHA512

783aae33663a4db32f88ea6321a696103ba060b0776436f0aebfeff00a2672fb049dab66594a3809f7fc794d15d7e451bffb0c77f2eb2c39038ce4f808fb07fd
SSDEEP

24576:DoGUbmtvDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD/:P9t

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

Windows security bypass 2 TTPs 1 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\rnnzklak = "0"	svchost.exe

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
2728	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\rnnzklak\ImagePath = "C:\\Windows\\SysWOW64\\rnnzklak\\gvieqpiu.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2808	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2848	gvieqpiu.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2848 set thread context of 2808	2848	gvieqpiu.exe	44

Launches sc.exe 3 IoCs

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

pid	Process
2760	sc.exe
2720	sc.exe
2836	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

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	f7337c874dc52cb9c05855846b4cc0c2_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	netsh.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	gvieqpiu.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2544 wrote to memory of 2348	2544	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	31
PID 2544 wrote to memory of 2348	2544	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	31
PID 2544 wrote to memory of 2348	2544	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	31
PID 2544 wrote to memory of 2348	2544	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	31
PID 2544 wrote to memory of 2496	2544	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	33
PID 2544 wrote to memory of 2496	2544	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	33
PID 2544 wrote to memory of 2496	2544	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	33
PID 2544 wrote to memory of 2496	2544	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	33
PID 2544 wrote to memory of 2760	2544	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	35
PID 2544 wrote to memory of 2760	2544	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	35
PID 2544 wrote to memory of 2760	2544	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	35
PID 2544 wrote to memory of 2760	2544	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	35
PID 2544 wrote to memory of 2720	2544	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	37
PID 2544 wrote to memory of 2720	2544	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	37
PID 2544 wrote to memory of 2720	2544	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	37
PID 2544 wrote to memory of 2720	2544	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	37
PID 2544 wrote to memory of 2836	2544	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	39
PID 2544 wrote to memory of 2836	2544	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	39
PID 2544 wrote to memory of 2836	2544	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	39
PID 2544 wrote to memory of 2836	2544	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	39
PID 2544 wrote to memory of 2728	2544	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	42
PID 2544 wrote to memory of 2728	2544	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	42
PID 2544 wrote to memory of 2728	2544	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	42
PID 2544 wrote to memory of 2728	2544	f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe	42
PID 2848 wrote to memory of 2808	2848	gvieqpiu.exe	44
PID 2848 wrote to memory of 2808	2848	gvieqpiu.exe	44
PID 2848 wrote to memory of 2808	2848	gvieqpiu.exe	44
PID 2848 wrote to memory of 2808	2848	gvieqpiu.exe	44
PID 2848 wrote to memory of 2808	2848	gvieqpiu.exe	44
PID 2848 wrote to memory of 2808	2848	gvieqpiu.exe	44

C:\Users\Admin\AppData\Local\Temp\f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2544
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rnnzklak\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2348
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gvieqpiu.exe" C:\Windows\SysWOW64\rnnzklak\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2496
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create rnnzklak binPath= "C:\Windows\SysWOW64\rnnzklak\gvieqpiu.exe /d\"C:\Users\Admin\AppData\Local\Temp\f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2760
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description rnnzklak "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2720
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start rnnzklak
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2836
- 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:2728

C:\Windows\SysWOW64\rnnzklak\gvieqpiu.exe
C:\Windows\SysWOW64\rnnzklak\gvieqpiu.exe /d"C:\Users\Admin\AppData\Local\Temp\f7337c874dc52cb9c05855846b4cc0c2_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2848
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2808

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

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

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

C:\Users\Admin\AppData\Local\Temp\gvieqpiu.exe

Filesize
10.0MB

MD5
e2ad15bd158d5bfe98d7ebcdbc8da710

SHA1
6c2d1d15e0a94bde8af93c84411fabbf9583e2d6

SHA256
b94b7910a58ca855836ae7574575f9514bc859a313d2b5e0580550757c1c07a3

SHA512
6ce2c6f415bd649260b96d79492f6f9810d0ae0a0e449dc6ee61697db8911bf51b70c42f33399f98a868c815389726173f751a8d7f52c973efdea5eee917b415

Download Submit
memory/2544-9-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2544-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2544-2-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2544-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2544-8-0x0000000000400000-0x0000000002B8F000-memory.dmp

Filesize
39.6MB

Download
memory/2544-1-0x0000000002C80000-0x0000000002D80000-memory.dmp

Filesize
1024KB

Download
memory/2808-11-0x00000000000E0000-0x00000000000F5000-memory.dmp

Filesize
84KB

Download
memory/2808-14-0x00000000000E0000-0x00000000000F5000-memory.dmp

Filesize
84KB

Download
memory/2808-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2808-17-0x00000000000E0000-0x00000000000F5000-memory.dmp

Filesize
84KB

Download
memory/2808-18-0x00000000000E0000-0x00000000000F5000-memory.dmp

Filesize
84KB

Download
memory/2848-15-0x0000000000400000-0x0000000002B8F000-memory.dmp

Filesize
39.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads