tofsee | 38b1c41c5fefba7748d9c832b2f2ad6223a37f27afb3eb8b72f8d16bd30cbf13

Analysis

max time kernel
150s
max time network
150s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
06-01-2025 09:20

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General

Target

JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe
Size

13.9MB
MD5

1b5150200509334e86b497d0eb143cb0
SHA1

5ad9fc641d3c4c8a11aa8132b9e38b4a900015e1
SHA256

38b1c41c5fefba7748d9c832b2f2ad6223a37f27afb3eb8b72f8d16bd30cbf13
SHA512

18429d3d9f0c7070dbb10902a0d5d8547442d4358f2627f6247b3244b04850d652ee6766d88a1e6dfac4e908e8e9087157500d63be26b9020f884ea00b8b764c
SSDEEP

49152:2yzapZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZh:2C

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

quadoil.ru

lakeflex.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\bquvuwgr = "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
2712	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\bquvuwgr\ImagePath = "C:\\Windows\\SysWOW64\\bquvuwgr\\zayileju.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2880	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2772	zayileju.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2772 set thread context of 2880	2772	zayileju.exe	44

Launches sc.exe 3 IoCs

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

pid	Process
2844	sc.exe
860	sc.exe
2768	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 value enumerated	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key queried	\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_1b5150200509334e86b497d0eb143cb0.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.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	zayileju.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 3016 wrote to memory of 2340	3016	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	31
PID 3016 wrote to memory of 2340	3016	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	31
PID 3016 wrote to memory of 2340	3016	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	31
PID 3016 wrote to memory of 2340	3016	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	31
PID 3016 wrote to memory of 1264	3016	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	33
PID 3016 wrote to memory of 1264	3016	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	33
PID 3016 wrote to memory of 1264	3016	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	33
PID 3016 wrote to memory of 1264	3016	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	33
PID 3016 wrote to memory of 2844	3016	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	35
PID 3016 wrote to memory of 2844	3016	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	35
PID 3016 wrote to memory of 2844	3016	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	35
PID 3016 wrote to memory of 2844	3016	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	35
PID 3016 wrote to memory of 860	3016	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	37
PID 3016 wrote to memory of 860	3016	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	37
PID 3016 wrote to memory of 860	3016	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	37
PID 3016 wrote to memory of 860	3016	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	37
PID 3016 wrote to memory of 2768	3016	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	39
PID 3016 wrote to memory of 2768	3016	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	39
PID 3016 wrote to memory of 2768	3016	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	39
PID 3016 wrote to memory of 2768	3016	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	39
PID 3016 wrote to memory of 2712	3016	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	42
PID 3016 wrote to memory of 2712	3016	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	42
PID 3016 wrote to memory of 2712	3016	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	42
PID 3016 wrote to memory of 2712	3016	JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe	42
PID 2772 wrote to memory of 2880	2772	zayileju.exe	44
PID 2772 wrote to memory of 2880	2772	zayileju.exe	44
PID 2772 wrote to memory of 2880	2772	zayileju.exe	44
PID 2772 wrote to memory of 2880	2772	zayileju.exe	44
PID 2772 wrote to memory of 2880	2772	zayileju.exe	44
PID 2772 wrote to memory of 2880	2772	zayileju.exe	44

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3016
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bquvuwgr\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2340
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zayileju.exe" C:\Windows\SysWOW64\bquvuwgr\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1264
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create bquvuwgr binPath= "C:\Windows\SysWOW64\bquvuwgr\zayileju.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1b5150200509334e86b497d0eb143cb0.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2844
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description bquvuwgr "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:860
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start bquvuwgr
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2768
- 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:2712

C:\Windows\SysWOW64\bquvuwgr\zayileju.exe
C:\Windows\SysWOW64\bquvuwgr\zayileju.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1b5150200509334e86b497d0eb143cb0.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:2880

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\zayileju.exe

Filesize
14.9MB

MD5
f468cdfa036081e304548d2b3eab23d9

SHA1
db8147ecf96d2ff9fda05e5d4602f1f6226b48d8

SHA256
23a37ee91e3bbba84865bd0d6bb615a74cd18126c507cd4ec1393f796a01cbfc

SHA512
5803dcc94241606d596873241732f04b8a7833c38cfe8cdef2706ee4b9937f88426f81613507c797e76bf18002a105a2798bb645923de93585b265ac180ddb0e

Download Submit
memory/2772-17-0x0000000000400000-0x00000000016BD000-memory.dmp

Filesize
18.7MB

Download
memory/2880-12-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2880-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2880-15-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2880-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2880-19-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/3016-4-0x0000000000400000-0x00000000016BD000-memory.dmp

Filesize
18.7MB

Download
memory/3016-11-0x00000000017A0000-0x00000000018A0000-memory.dmp

Filesize
1024KB

Download
memory/3016-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3016-9-0x0000000000400000-0x00000000016BD000-memory.dmp

Filesize
18.7MB

Download
memory/3016-1-0x00000000017A0000-0x00000000018A0000-memory.dmp

Filesize
1024KB

Download
memory/3016-2-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads