tofsee | 8a02b485f82fcf55b775350e77c3fc0a1d1bdc514e984342e5da21998c373ae5

Analysis

max time kernel
145s
max time network
122s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
06-01-2025 23:30

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General

Target

JaffaCakes118_40b4f77308772ba74d7e44905d9d0802.exe
Size

14.9MB
MD5

40b4f77308772ba74d7e44905d9d0802
SHA1

3298eca6413ecb835ebc4b2883aa5a117fa0fb45
SHA256

8a02b485f82fcf55b775350e77c3fc0a1d1bdc514e984342e5da21998c373ae5
SHA512

dc38793f92936c5aabeadbdb63dc4c1019bb1f0c4af51940a986d7c986349ee4429d3f6018efa5877a1adbd9ea068f3dbae2f480c89cc9fb7e5e3b9cff7ff259
SSDEEP

1536:3VZK1I9rn2BHELrWh9iuDdJm7CyY8rhGDNDxTWNdUhUFIq:bK1Mn2BHsrt4mYnrMdUh

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

43.231.4.7

lazystax.ru

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\jxgoufdd = "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
2864	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\jxgoufdd\ImagePath = "C:\\Windows\\SysWOW64\\jxgoufdd\\cfnnljnw.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2636	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2448	cfnnljnw.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2448 set thread context of 2636	2448	cfnnljnw.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
2356	sc.exe
2368	sc.exe
2392	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	JaffaCakes118_40b4f77308772ba74d7e44905d9d0802.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	cfnnljnw.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1740 wrote to memory of 2544	1740	JaffaCakes118_40b4f77308772ba74d7e44905d9d0802.exe	30
PID 1740 wrote to memory of 2544	1740	JaffaCakes118_40b4f77308772ba74d7e44905d9d0802.exe	30
PID 1740 wrote to memory of 2544	1740	JaffaCakes118_40b4f77308772ba74d7e44905d9d0802.exe	30
PID 1740 wrote to memory of 2544	1740	JaffaCakes118_40b4f77308772ba74d7e44905d9d0802.exe	30
PID 1740 wrote to memory of 1200	1740	JaffaCakes118_40b4f77308772ba74d7e44905d9d0802.exe	32
PID 1740 wrote to memory of 1200	1740	JaffaCakes118_40b4f77308772ba74d7e44905d9d0802.exe	32
PID 1740 wrote to memory of 1200	1740	JaffaCakes118_40b4f77308772ba74d7e44905d9d0802.exe	32
PID 1740 wrote to memory of 1200	1740	JaffaCakes118_40b4f77308772ba74d7e44905d9d0802.exe	32
PID 1740 wrote to memory of 2356	1740	JaffaCakes118_40b4f77308772ba74d7e44905d9d0802.exe	34
PID 1740 wrote to memory of 2356	1740	JaffaCakes118_40b4f77308772ba74d7e44905d9d0802.exe	34
PID 1740 wrote to memory of 2356	1740	JaffaCakes118_40b4f77308772ba74d7e44905d9d0802.exe	34
PID 1740 wrote to memory of 2356	1740	JaffaCakes118_40b4f77308772ba74d7e44905d9d0802.exe	34
PID 1740 wrote to memory of 2368	1740	JaffaCakes118_40b4f77308772ba74d7e44905d9d0802.exe	36
PID 1740 wrote to memory of 2368	1740	JaffaCakes118_40b4f77308772ba74d7e44905d9d0802.exe	36
PID 1740 wrote to memory of 2368	1740	JaffaCakes118_40b4f77308772ba74d7e44905d9d0802.exe	36
PID 1740 wrote to memory of 2368	1740	JaffaCakes118_40b4f77308772ba74d7e44905d9d0802.exe	36
PID 1740 wrote to memory of 2392	1740	JaffaCakes118_40b4f77308772ba74d7e44905d9d0802.exe	38
PID 1740 wrote to memory of 2392	1740	JaffaCakes118_40b4f77308772ba74d7e44905d9d0802.exe	38
PID 1740 wrote to memory of 2392	1740	JaffaCakes118_40b4f77308772ba74d7e44905d9d0802.exe	38
PID 1740 wrote to memory of 2392	1740	JaffaCakes118_40b4f77308772ba74d7e44905d9d0802.exe	38
PID 2448 wrote to memory of 2636	2448	cfnnljnw.exe	41
PID 2448 wrote to memory of 2636	2448	cfnnljnw.exe	41
PID 2448 wrote to memory of 2636	2448	cfnnljnw.exe	41
PID 2448 wrote to memory of 2636	2448	cfnnljnw.exe	41
PID 2448 wrote to memory of 2636	2448	cfnnljnw.exe	41
PID 2448 wrote to memory of 2636	2448	cfnnljnw.exe	41
PID 1740 wrote to memory of 2864	1740	JaffaCakes118_40b4f77308772ba74d7e44905d9d0802.exe	42
PID 1740 wrote to memory of 2864	1740	JaffaCakes118_40b4f77308772ba74d7e44905d9d0802.exe	42
PID 1740 wrote to memory of 2864	1740	JaffaCakes118_40b4f77308772ba74d7e44905d9d0802.exe	42
PID 1740 wrote to memory of 2864	1740	JaffaCakes118_40b4f77308772ba74d7e44905d9d0802.exe	42

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40b4f77308772ba74d7e44905d9d0802.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40b4f77308772ba74d7e44905d9d0802.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1740
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jxgoufdd\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2544
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\cfnnljnw.exe" C:\Windows\SysWOW64\jxgoufdd\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1200
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create jxgoufdd binPath= "C:\Windows\SysWOW64\jxgoufdd\cfnnljnw.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40b4f77308772ba74d7e44905d9d0802.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2356
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description jxgoufdd "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2368
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start jxgoufdd
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2392
- 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:2864

C:\Windows\SysWOW64\jxgoufdd\cfnnljnw.exe
C:\Windows\SysWOW64\jxgoufdd\cfnnljnw.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_40b4f77308772ba74d7e44905d9d0802.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2448
- 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:2636

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\cfnnljnw.exe

Filesize
14.6MB

MD5
551517f8486806f0628c305afda60211

SHA1
7ac61c183fe81f0ae44e1b599182098b80edabbc

SHA256
f388c60f0cb30f30f0b60c232a63086aeba8e11344d232a2792597f59e45ee43

SHA512
f1d817c156ca7a474a367ba31f686a584d4185eb3e27bddef4bce7ab482f4422d345003b1dd87850f1b22cca7b31b04baf15d0241a07c319f8507e65160d3264

Download Submit
memory/1740-0-0x00000000001E0000-0x00000000001E1000-memory.dmp

Filesize
4KB

Download
memory/1740-1-0x00000000001F0000-0x00000000001F1000-memory.dmp

Filesize
4KB

Download
memory/1740-2-0x0000000000400000-0x000000000041A000-memory.dmp

Filesize
104KB

Download
memory/1740-13-0x0000000000400000-0x000000000041A000-memory.dmp

Filesize
104KB

Download
memory/2448-12-0x0000000000400000-0x000000000041A000-memory.dmp

Filesize
104KB

Download
memory/2636-10-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2636-9-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2636-7-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2636-14-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2636-15-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads