tofsee | 72eabb98b030c60e324f6234552c30a1e5732ff719add8b1108ebc7715d1784f

Analysis

max time kernel
150s
max time network
156s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
20-10-2024 03:56

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General

Target

603b77f0ac8874df7836569314c53bc4_JaffaCakes118.exe
Size

239KB
MD5

603b77f0ac8874df7836569314c53bc4
SHA1

a602ae142dee77dfef51a47c1cf5eafe040198bd
SHA256

72eabb98b030c60e324f6234552c30a1e5732ff719add8b1108ebc7715d1784f
SHA512

ef87dc2390def2f156490712f596b3f1f4016a7e59a4a3e8e9c1ade04caaaff6f2ab2648993d3de5bf740513317e6b4219b4c3acd5f49d42b42e2ad02ea6e255
SSDEEP

3072:EMvoJ8oyOUQmaEa1otqKjHJSQEb/PUNnrU0vyHeN2hFRsGcPEH/UnpkWxeVxENO:EMvw8F3QDEFgIpb8U92ebznbxe4

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

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\nsrvhrsl = "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
2756	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\nsrvhrsl\ImagePath = "C:\\Windows\\SysWOW64\\nsrvhrsl\\brrrgxdv.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2572	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2772	brrrgxdv.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2772 set thread context of 2572	2772	brrrgxdv.exe	42

Launches sc.exe 3 IoCs

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

pid	Process
3032	sc.exe
2840	sc.exe
3024	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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	brrrgxdv.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	603b77f0ac8874df7836569314c53bc4_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2904 wrote to memory of 2436	2904	603b77f0ac8874df7836569314c53bc4_JaffaCakes118.exe	29
PID 2904 wrote to memory of 2436	2904	603b77f0ac8874df7836569314c53bc4_JaffaCakes118.exe	29
PID 2904 wrote to memory of 2436	2904	603b77f0ac8874df7836569314c53bc4_JaffaCakes118.exe	29
PID 2904 wrote to memory of 2436	2904	603b77f0ac8874df7836569314c53bc4_JaffaCakes118.exe	29
PID 2904 wrote to memory of 3012	2904	603b77f0ac8874df7836569314c53bc4_JaffaCakes118.exe	31
PID 2904 wrote to memory of 3012	2904	603b77f0ac8874df7836569314c53bc4_JaffaCakes118.exe	31
PID 2904 wrote to memory of 3012	2904	603b77f0ac8874df7836569314c53bc4_JaffaCakes118.exe	31
PID 2904 wrote to memory of 3012	2904	603b77f0ac8874df7836569314c53bc4_JaffaCakes118.exe	31
PID 2904 wrote to memory of 2840	2904	603b77f0ac8874df7836569314c53bc4_JaffaCakes118.exe	33
PID 2904 wrote to memory of 2840	2904	603b77f0ac8874df7836569314c53bc4_JaffaCakes118.exe	33
PID 2904 wrote to memory of 2840	2904	603b77f0ac8874df7836569314c53bc4_JaffaCakes118.exe	33
PID 2904 wrote to memory of 2840	2904	603b77f0ac8874df7836569314c53bc4_JaffaCakes118.exe	33
PID 2904 wrote to memory of 3024	2904	603b77f0ac8874df7836569314c53bc4_JaffaCakes118.exe	35
PID 2904 wrote to memory of 3024	2904	603b77f0ac8874df7836569314c53bc4_JaffaCakes118.exe	35
PID 2904 wrote to memory of 3024	2904	603b77f0ac8874df7836569314c53bc4_JaffaCakes118.exe	35
PID 2904 wrote to memory of 3024	2904	603b77f0ac8874df7836569314c53bc4_JaffaCakes118.exe	35
PID 2904 wrote to memory of 3032	2904	603b77f0ac8874df7836569314c53bc4_JaffaCakes118.exe	37
PID 2904 wrote to memory of 3032	2904	603b77f0ac8874df7836569314c53bc4_JaffaCakes118.exe	37
PID 2904 wrote to memory of 3032	2904	603b77f0ac8874df7836569314c53bc4_JaffaCakes118.exe	37
PID 2904 wrote to memory of 3032	2904	603b77f0ac8874df7836569314c53bc4_JaffaCakes118.exe	37
PID 2904 wrote to memory of 2756	2904	603b77f0ac8874df7836569314c53bc4_JaffaCakes118.exe	39
PID 2904 wrote to memory of 2756	2904	603b77f0ac8874df7836569314c53bc4_JaffaCakes118.exe	39
PID 2904 wrote to memory of 2756	2904	603b77f0ac8874df7836569314c53bc4_JaffaCakes118.exe	39
PID 2904 wrote to memory of 2756	2904	603b77f0ac8874df7836569314c53bc4_JaffaCakes118.exe	39
PID 2772 wrote to memory of 2572	2772	brrrgxdv.exe	42
PID 2772 wrote to memory of 2572	2772	brrrgxdv.exe	42
PID 2772 wrote to memory of 2572	2772	brrrgxdv.exe	42
PID 2772 wrote to memory of 2572	2772	brrrgxdv.exe	42
PID 2772 wrote to memory of 2572	2772	brrrgxdv.exe	42
PID 2772 wrote to memory of 2572	2772	brrrgxdv.exe	42

C:\Users\Admin\AppData\Local\Temp\603b77f0ac8874df7836569314c53bc4_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\603b77f0ac8874df7836569314c53bc4_JaffaCakes118.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2904
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\nsrvhrsl\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2436
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\brrrgxdv.exe" C:\Windows\SysWOW64\nsrvhrsl\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3012
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create nsrvhrsl binPath= "C:\Windows\SysWOW64\nsrvhrsl\brrrgxdv.exe /d\"C:\Users\Admin\AppData\Local\Temp\603b77f0ac8874df7836569314c53bc4_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2840
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description nsrvhrsl "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3024
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start nsrvhrsl
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3032
- 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:2756

C:\Windows\SysWOW64\nsrvhrsl\brrrgxdv.exe
C:\Windows\SysWOW64\nsrvhrsl\brrrgxdv.exe /d"C:\Users\Admin\AppData\Local\Temp\603b77f0ac8874df7836569314c53bc4_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2772
- 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:2572

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\brrrgxdv.exe

Filesize
11.7MB

MD5
17a1531c3006f1e6058f3cefe0a4d905

SHA1
435d73c9e3deeb00663adbc1cd09f8d34ec0eae6

SHA256
334ae6fd3fd5188e34627d63559124745dad82517ef00d0b5fd1317edd2949ca

SHA512
45dc07aa6ad25072b616cc432e2d3a7af027c3a955af77572b5948e986d8fa472431062210a91f9f10bede1162a308cb891fa1391e5feb2214709e99f76c3448

Download Submit
memory/2572-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2572-14-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2572-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2572-17-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2572-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2772-15-0x0000000000400000-0x000000000086B000-memory.dmp

Filesize
4.4MB

Download
memory/2904-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2904-2-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2904-8-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2904-7-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2904-6-0x0000000000400000-0x000000000086B000-memory.dmp

Filesize
4.4MB

Download
memory/2904-1-0x0000000000290000-0x0000000000390000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads