tofsee | 00423b5dc446d975260c85ace9a92f27398430fd56bbb3d42e190d281de8d954

Analysis

max time kernel
145s
max time network
144s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
11-01-2025 06:28

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General

Target

JaffaCakes118_f97ac5a687cc94db960df62fb910a74a.exe
Size

11.6MB
MD5

f97ac5a687cc94db960df62fb910a74a
SHA1

24b5c7775506327081ea3ed0093c62d938dd50e4
SHA256

00423b5dc446d975260c85ace9a92f27398430fd56bbb3d42e190d281de8d954
SHA512

ab81fd40d42ad8dd102b48906d5fba078360001cb300743b8e90849bc38d22f40302b6e26ee5d45f0b6bf1bd082e0293adee78ed3e21668c3c55b014d9746c0b
SSDEEP

196608:QPHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHn:Q

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\gjjwlyid = "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
2856	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\gjjwlyid\ImagePath = "C:\\Windows\\SysWOW64\\gjjwlyid\\cjvirefz.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
1712	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2868	cjvirefz.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2868 set thread context of 1712	2868	cjvirefz.exe	43

Launches sc.exe 3 IoCs

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

pid	Process
3000	sc.exe
2168	sc.exe
2756	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	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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cjvirefz.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_f97ac5a687cc94db960df62fb910a74a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2520 wrote to memory of 2384	2520	JaffaCakes118_f97ac5a687cc94db960df62fb910a74a.exe	30
PID 2520 wrote to memory of 2384	2520	JaffaCakes118_f97ac5a687cc94db960df62fb910a74a.exe	30
PID 2520 wrote to memory of 2384	2520	JaffaCakes118_f97ac5a687cc94db960df62fb910a74a.exe	30
PID 2520 wrote to memory of 2384	2520	JaffaCakes118_f97ac5a687cc94db960df62fb910a74a.exe	30
PID 2520 wrote to memory of 1812	2520	JaffaCakes118_f97ac5a687cc94db960df62fb910a74a.exe	32
PID 2520 wrote to memory of 1812	2520	JaffaCakes118_f97ac5a687cc94db960df62fb910a74a.exe	32
PID 2520 wrote to memory of 1812	2520	JaffaCakes118_f97ac5a687cc94db960df62fb910a74a.exe	32
PID 2520 wrote to memory of 1812	2520	JaffaCakes118_f97ac5a687cc94db960df62fb910a74a.exe	32
PID 2520 wrote to memory of 3000	2520	JaffaCakes118_f97ac5a687cc94db960df62fb910a74a.exe	34
PID 2520 wrote to memory of 3000	2520	JaffaCakes118_f97ac5a687cc94db960df62fb910a74a.exe	34
PID 2520 wrote to memory of 3000	2520	JaffaCakes118_f97ac5a687cc94db960df62fb910a74a.exe	34
PID 2520 wrote to memory of 3000	2520	JaffaCakes118_f97ac5a687cc94db960df62fb910a74a.exe	34
PID 2520 wrote to memory of 2168	2520	JaffaCakes118_f97ac5a687cc94db960df62fb910a74a.exe	36
PID 2520 wrote to memory of 2168	2520	JaffaCakes118_f97ac5a687cc94db960df62fb910a74a.exe	36
PID 2520 wrote to memory of 2168	2520	JaffaCakes118_f97ac5a687cc94db960df62fb910a74a.exe	36
PID 2520 wrote to memory of 2168	2520	JaffaCakes118_f97ac5a687cc94db960df62fb910a74a.exe	36
PID 2520 wrote to memory of 2756	2520	JaffaCakes118_f97ac5a687cc94db960df62fb910a74a.exe	38
PID 2520 wrote to memory of 2756	2520	JaffaCakes118_f97ac5a687cc94db960df62fb910a74a.exe	38
PID 2520 wrote to memory of 2756	2520	JaffaCakes118_f97ac5a687cc94db960df62fb910a74a.exe	38
PID 2520 wrote to memory of 2756	2520	JaffaCakes118_f97ac5a687cc94db960df62fb910a74a.exe	38
PID 2520 wrote to memory of 2856	2520	JaffaCakes118_f97ac5a687cc94db960df62fb910a74a.exe	41
PID 2520 wrote to memory of 2856	2520	JaffaCakes118_f97ac5a687cc94db960df62fb910a74a.exe	41
PID 2520 wrote to memory of 2856	2520	JaffaCakes118_f97ac5a687cc94db960df62fb910a74a.exe	41
PID 2520 wrote to memory of 2856	2520	JaffaCakes118_f97ac5a687cc94db960df62fb910a74a.exe	41
PID 2868 wrote to memory of 1712	2868	cjvirefz.exe	43
PID 2868 wrote to memory of 1712	2868	cjvirefz.exe	43
PID 2868 wrote to memory of 1712	2868	cjvirefz.exe	43
PID 2868 wrote to memory of 1712	2868	cjvirefz.exe	43
PID 2868 wrote to memory of 1712	2868	cjvirefz.exe	43
PID 2868 wrote to memory of 1712	2868	cjvirefz.exe	43

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_f97ac5a687cc94db960df62fb910a74a.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_f97ac5a687cc94db960df62fb910a74a.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2520
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\gjjwlyid\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2384
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\cjvirefz.exe" C:\Windows\SysWOW64\gjjwlyid\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1812
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create gjjwlyid binPath= "C:\Windows\SysWOW64\gjjwlyid\cjvirefz.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_f97ac5a687cc94db960df62fb910a74a.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3000
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description gjjwlyid "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2168
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start gjjwlyid
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2756
- 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:2856

C:\Windows\SysWOW64\gjjwlyid\cjvirefz.exe
C:\Windows\SysWOW64\gjjwlyid\cjvirefz.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_f97ac5a687cc94db960df62fb910a74a.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2868
- 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:1712

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\cjvirefz.exe

Filesize
14.7MB

MD5
3e6fb58e514a7dd43822a66f55def1b6

SHA1
869bcd89a6de04a9d48951e0e77985ab1ae24384

SHA256
af00db84105b9cfd7d7c215ec0d8cbd8971cea30585beaf3bef39f085f91d4d8

SHA512
4beb41d83780161ae999803e63be3b063f2201a6a9bce462d39e12c1c8cb4e66a792e11d18e173c84397c8ec44bf9e66e9695fb3ce814730bb02777eb7518966

Download Submit
memory/1712-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1712-16-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1712-14-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1712-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1712-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2520-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2520-2-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2520-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2520-9-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2520-8-0x0000000000400000-0x0000000000870000-memory.dmp

Filesize
4.4MB

Download
memory/2520-1-0x00000000009C0000-0x0000000000AC0000-memory.dmp

Filesize
1024KB

Download
memory/2868-17-0x0000000000400000-0x0000000000870000-memory.dmp

Filesize
4.4MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads