tofsee | 8b375f518fff7dbc1a19a8a088f0b29607a4edd6341f5edf32fc17d2aca29c20

Analysis

max time kernel
147s
max time network
147s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
31-12-2024 22:02

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

JaffaCakes118_39a4223734b3e0de32868512cbb0caea.exe
Size

12.2MB
MD5

39a4223734b3e0de32868512cbb0caea
SHA1

9a37a54a9c3746471928a4256c2de833430e429d
SHA256

8b375f518fff7dbc1a19a8a088f0b29607a4edd6341f5edf32fc17d2aca29c20
SHA512

b9a1aca79b459e58f2a9cdf0757a3c344a4e8145da057601f44e7699ee81a5bb1f801105ead8f15f79eaa49666347ae923882552a065d42a2ae82e97540b5f82
SSDEEP

98304:nUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUE:

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\gvvdrebf = "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
2212	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\gvvdrebf\ImagePath = "C:\\Windows\\SysWOW64\\gvvdrebf\\eupbvhld.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2872	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2852	eupbvhld.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2852 set thread context of 2872	2852	eupbvhld.exe	44

Launches sc.exe 3 IoCs

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

pid	Process
2524	sc.exe
2464	sc.exe
2980	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	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	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	eupbvhld.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_39a4223734b3e0de32868512cbb0caea.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 3064 wrote to memory of 2604	3064	JaffaCakes118_39a4223734b3e0de32868512cbb0caea.exe	30
PID 3064 wrote to memory of 2604	3064	JaffaCakes118_39a4223734b3e0de32868512cbb0caea.exe	30
PID 3064 wrote to memory of 2604	3064	JaffaCakes118_39a4223734b3e0de32868512cbb0caea.exe	30
PID 3064 wrote to memory of 2604	3064	JaffaCakes118_39a4223734b3e0de32868512cbb0caea.exe	30
PID 3064 wrote to memory of 2548	3064	JaffaCakes118_39a4223734b3e0de32868512cbb0caea.exe	32
PID 3064 wrote to memory of 2548	3064	JaffaCakes118_39a4223734b3e0de32868512cbb0caea.exe	32
PID 3064 wrote to memory of 2548	3064	JaffaCakes118_39a4223734b3e0de32868512cbb0caea.exe	32
PID 3064 wrote to memory of 2548	3064	JaffaCakes118_39a4223734b3e0de32868512cbb0caea.exe	32
PID 3064 wrote to memory of 2524	3064	JaffaCakes118_39a4223734b3e0de32868512cbb0caea.exe	34
PID 3064 wrote to memory of 2524	3064	JaffaCakes118_39a4223734b3e0de32868512cbb0caea.exe	34
PID 3064 wrote to memory of 2524	3064	JaffaCakes118_39a4223734b3e0de32868512cbb0caea.exe	34
PID 3064 wrote to memory of 2524	3064	JaffaCakes118_39a4223734b3e0de32868512cbb0caea.exe	34
PID 3064 wrote to memory of 2464	3064	JaffaCakes118_39a4223734b3e0de32868512cbb0caea.exe	36
PID 3064 wrote to memory of 2464	3064	JaffaCakes118_39a4223734b3e0de32868512cbb0caea.exe	36
PID 3064 wrote to memory of 2464	3064	JaffaCakes118_39a4223734b3e0de32868512cbb0caea.exe	36
PID 3064 wrote to memory of 2464	3064	JaffaCakes118_39a4223734b3e0de32868512cbb0caea.exe	36
PID 3064 wrote to memory of 2980	3064	JaffaCakes118_39a4223734b3e0de32868512cbb0caea.exe	38
PID 3064 wrote to memory of 2980	3064	JaffaCakes118_39a4223734b3e0de32868512cbb0caea.exe	38
PID 3064 wrote to memory of 2980	3064	JaffaCakes118_39a4223734b3e0de32868512cbb0caea.exe	38
PID 3064 wrote to memory of 2980	3064	JaffaCakes118_39a4223734b3e0de32868512cbb0caea.exe	38
PID 3064 wrote to memory of 2212	3064	JaffaCakes118_39a4223734b3e0de32868512cbb0caea.exe	41
PID 3064 wrote to memory of 2212	3064	JaffaCakes118_39a4223734b3e0de32868512cbb0caea.exe	41
PID 3064 wrote to memory of 2212	3064	JaffaCakes118_39a4223734b3e0de32868512cbb0caea.exe	41
PID 3064 wrote to memory of 2212	3064	JaffaCakes118_39a4223734b3e0de32868512cbb0caea.exe	41
PID 2852 wrote to memory of 2872	2852	eupbvhld.exe	44
PID 2852 wrote to memory of 2872	2852	eupbvhld.exe	44
PID 2852 wrote to memory of 2872	2852	eupbvhld.exe	44
PID 2852 wrote to memory of 2872	2852	eupbvhld.exe	44
PID 2852 wrote to memory of 2872	2852	eupbvhld.exe	44
PID 2852 wrote to memory of 2872	2852	eupbvhld.exe	44

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_39a4223734b3e0de32868512cbb0caea.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_39a4223734b3e0de32868512cbb0caea.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3064
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\gvvdrebf\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2604
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\eupbvhld.exe" C:\Windows\SysWOW64\gvvdrebf\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2548
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create gvvdrebf binPath= "C:\Windows\SysWOW64\gvvdrebf\eupbvhld.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_39a4223734b3e0de32868512cbb0caea.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2524
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description gvvdrebf "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2464
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start gvvdrebf
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2980
- 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:2212

C:\Windows\SysWOW64\gvvdrebf\eupbvhld.exe
C:\Windows\SysWOW64\gvvdrebf\eupbvhld.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_39a4223734b3e0de32868512cbb0caea.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2852
- 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:2872

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

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
13.8MB

MD5
03c46ee1635f1deeda74ba8572c9678d

SHA1
c41105955c1f9a207432472ed737e19d9e689170

SHA256
1a2167936b52200341afad72300454eb948ef1b05a34a805cbd261236565acb9

SHA512
7c8320e7ae4f0e3e59f60c7d3015e4900049efe2ff4a8b1c7c377103308fb54f42acfa9799abcf46d3c257b68b20a28dd9bc14f56825cb2dbe689be86ede3511

Download Submit
memory/2852-17-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/2872-16-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2872-14-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2872-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2872-11-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2872-18-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/3064-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3064-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3064-9-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/3064-8-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/3064-1-0x0000000000550000-0x0000000000650000-memory.dmp

Filesize
1024KB

Download
memory/3064-2-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads