tofsee | be5f6be838cda666934c8154d4f504f55af259d4bd3642406c539148e673a905

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
08/10/2024, 20:24

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General

Target

24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe
Size

14.3MB
MD5

24f65dcc42b6801b30a7eb679b571372
SHA1

cc39a9bc20d111ea4654e326774cb74d84abd3cd
SHA256

be5f6be838cda666934c8154d4f504f55af259d4bd3642406c539148e673a905
SHA512

d21b631b35140f7d24910857cc45fee17dd2b64d05cde3469d27d7b00a603225d73b88af80ac48d4b4055ce881224fcaceab2cb0516b0044b96ce55730ee628e
SSDEEP

196608:CvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvP:

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\pbvxukkf = "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
3068	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\pbvxukkf\ImagePath = "C:\\Windows\\SysWOW64\\pbvxukkf\\ylhxfmhr.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
580	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2648	ylhxfmhr.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2648 set thread context of 580	2648	ylhxfmhr.exe	43

Launches sc.exe 3 IoCs

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

pid	Process
2308	sc.exe
2596	sc.exe
2720	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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ylhxfmhr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2844 wrote to memory of 2592	2844	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	30
PID 2844 wrote to memory of 2592	2844	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	30
PID 2844 wrote to memory of 2592	2844	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	30
PID 2844 wrote to memory of 2592	2844	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	30
PID 2844 wrote to memory of 2892	2844	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	32
PID 2844 wrote to memory of 2892	2844	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	32
PID 2844 wrote to memory of 2892	2844	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	32
PID 2844 wrote to memory of 2892	2844	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	32
PID 2844 wrote to memory of 2720	2844	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	34
PID 2844 wrote to memory of 2720	2844	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	34
PID 2844 wrote to memory of 2720	2844	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	34
PID 2844 wrote to memory of 2720	2844	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	34
PID 2844 wrote to memory of 2308	2844	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	36
PID 2844 wrote to memory of 2308	2844	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	36
PID 2844 wrote to memory of 2308	2844	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	36
PID 2844 wrote to memory of 2308	2844	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	36
PID 2844 wrote to memory of 2596	2844	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	38
PID 2844 wrote to memory of 2596	2844	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	38
PID 2844 wrote to memory of 2596	2844	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	38
PID 2844 wrote to memory of 2596	2844	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	38
PID 2844 wrote to memory of 3068	2844	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	41
PID 2844 wrote to memory of 3068	2844	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	41
PID 2844 wrote to memory of 3068	2844	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	41
PID 2844 wrote to memory of 3068	2844	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	41
PID 2648 wrote to memory of 580	2648	ylhxfmhr.exe	43
PID 2648 wrote to memory of 580	2648	ylhxfmhr.exe	43
PID 2648 wrote to memory of 580	2648	ylhxfmhr.exe	43
PID 2648 wrote to memory of 580	2648	ylhxfmhr.exe	43
PID 2648 wrote to memory of 580	2648	ylhxfmhr.exe	43
PID 2648 wrote to memory of 580	2648	ylhxfmhr.exe	43

C:\Users\Admin\AppData\Local\Temp\24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2844
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\pbvxukkf\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2592
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ylhxfmhr.exe" C:\Windows\SysWOW64\pbvxukkf\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2892
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create pbvxukkf binPath= "C:\Windows\SysWOW64\pbvxukkf\ylhxfmhr.exe /d\"C:\Users\Admin\AppData\Local\Temp\24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2720
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description pbvxukkf "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2308
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start pbvxukkf
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2596
- 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:3068

C:\Windows\SysWOW64\pbvxukkf\ylhxfmhr.exe
C:\Windows\SysWOW64\pbvxukkf\ylhxfmhr.exe /d"C:\Users\Admin\AppData\Local\Temp\24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2648
- 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:580

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\ylhxfmhr.exe

Filesize
10.2MB

MD5
d710da2c72712a5234c12cbc19c9ce38

SHA1
3287b628791bffbc35f07d8ad2d2257fcdcd931b

SHA256
9b67f3a84d397896a8119a69bf0f52a0013df1392ad7f76b525cdfa3320844c8

SHA512
69ec218075e472144947b246b0adb7f5487762a554118fc8f97e2a0e8275e5d33733ba8718c7d57e41517ab0697cc0679eebc9e1ffc5ad2f942707b924f01ba5

Download Submit
memory/580-14-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/580-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/580-16-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/580-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/580-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2648-17-0x0000000000400000-0x0000000002C6D000-memory.dmp

Filesize
40.4MB

Download
memory/2844-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2844-2-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2844-9-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2844-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2844-8-0x0000000000400000-0x0000000002C6D000-memory.dmp

Filesize
40.4MB

Download
memory/2844-1-0x0000000002DF0000-0x0000000002EF0000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads