tofsee | 3524db898f877769c05f7ddf2d8ce8aaeab657f72101c37cf1cb6e1dae27db60

Analysis

max time kernel
146s
max time network
146s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
31-12-2024 20:07

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General

Target

JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe
Size

11.7MB
MD5

33e82123f4c295fa0a745a2e8a7494bf
SHA1

98a77e79583752b4525e3db66c8c72ef1b3e6727
SHA256

3524db898f877769c05f7ddf2d8ce8aaeab657f72101c37cf1cb6e1dae27db60
SHA512

877296d2ea7720b52faec155e7cb850d0d59315bb7b274b6eb2e1c558bdb4d0eb9467110b58e0773ed248a19ee385c8fe18cf16bf3ed257f3260818592e70542
SSDEEP

6144:qpZQURQYSIyx87mtw370yh8hcihvqFAjUF:oZ6Iyx87R0ymGihiOjU

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\bbmnpvar = "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
2544	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\bbmnpvar\ImagePath = "C:\\Windows\\SysWOW64\\bbmnpvar\\zlsmrxks.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2720	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2808	zlsmrxks.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2808 set thread context of 2720	2808	zlsmrxks.exe	43

Launches sc.exe 3 IoCs

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

pid	Process
2384	sc.exe
2828	sc.exe
888	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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	zlsmrxks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2212 wrote to memory of 2796	2212	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	30
PID 2212 wrote to memory of 2796	2212	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	30
PID 2212 wrote to memory of 2796	2212	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	30
PID 2212 wrote to memory of 2796	2212	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	30
PID 2212 wrote to memory of 2928	2212	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	32
PID 2212 wrote to memory of 2928	2212	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	32
PID 2212 wrote to memory of 2928	2212	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	32
PID 2212 wrote to memory of 2928	2212	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	32
PID 2212 wrote to memory of 2384	2212	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	34
PID 2212 wrote to memory of 2384	2212	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	34
PID 2212 wrote to memory of 2384	2212	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	34
PID 2212 wrote to memory of 2384	2212	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	34
PID 2212 wrote to memory of 2828	2212	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	36
PID 2212 wrote to memory of 2828	2212	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	36
PID 2212 wrote to memory of 2828	2212	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	36
PID 2212 wrote to memory of 2828	2212	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	36
PID 2212 wrote to memory of 888	2212	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	38
PID 2212 wrote to memory of 888	2212	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	38
PID 2212 wrote to memory of 888	2212	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	38
PID 2212 wrote to memory of 888	2212	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	38
PID 2212 wrote to memory of 2544	2212	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	41
PID 2212 wrote to memory of 2544	2212	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	41
PID 2212 wrote to memory of 2544	2212	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	41
PID 2212 wrote to memory of 2544	2212	JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe	41
PID 2808 wrote to memory of 2720	2808	zlsmrxks.exe	43
PID 2808 wrote to memory of 2720	2808	zlsmrxks.exe	43
PID 2808 wrote to memory of 2720	2808	zlsmrxks.exe	43
PID 2808 wrote to memory of 2720	2808	zlsmrxks.exe	43
PID 2808 wrote to memory of 2720	2808	zlsmrxks.exe	43
PID 2808 wrote to memory of 2720	2808	zlsmrxks.exe	43

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2212
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bbmnpvar\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2796
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zlsmrxks.exe" C:\Windows\SysWOW64\bbmnpvar\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2928
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create bbmnpvar binPath= "C:\Windows\SysWOW64\bbmnpvar\zlsmrxks.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2384
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description bbmnpvar "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2828
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start bbmnpvar
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:888
- 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:2544

C:\Windows\SysWOW64\bbmnpvar\zlsmrxks.exe
C:\Windows\SysWOW64\bbmnpvar\zlsmrxks.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_33e82123f4c295fa0a745a2e8a7494bf.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2808
- 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:2720

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\zlsmrxks.exe

Filesize
11.6MB

MD5
3c41fc16d67823edffdf71e29d10674a

SHA1
994893ff17be9195752e2305545c29fec6f1665f

SHA256
902b798f42e56b24fddda136aee4109c021d5ce9b6b70009ad0f957c883e244f

SHA512
dd36c081e5f0374397abf5ffc1c6ea523dcac4500604c28c383dbc6e7ebeabdcf812b0809111ca729e2b0faae2911e563c5cc7de71dcdab4b630d62433d7c301

Download Submit
memory/2212-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2212-2-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2212-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2212-11-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2212-10-0x0000000000500000-0x0000000000600000-memory.dmp

Filesize
1024KB

Download
memory/2212-1-0x0000000000500000-0x0000000000600000-memory.dmp

Filesize
1024KB

Download
memory/2212-8-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/2720-15-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2720-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2720-12-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2720-17-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2720-19-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2808-18-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads