tofsee | 17c8e089ef56e32ac844760c25000893f39816928a17758bb9ebef6b253ddf9c

General

Target

02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe
Size

238KB
MD5

02a4be2bb32a8c16aeccc58a036fb973
SHA1

108b94317a15d4b268130d3028e46b66ed82ae07
SHA256

17c8e089ef56e32ac844760c25000893f39816928a17758bb9ebef6b253ddf9c
SHA512

56ca2e2b277f6a4a9c4d8d143efa9086d1f08caa4a61dddd5268b8cf0aba49862d9d36c285aacef89980e9a0a21e70ed5672210f1bd51f555334be4388bebf3a
SSDEEP

6144:xeaRFeYiZtnsLs/Xyihb124uKPoifbY/3sGIU5N5:xF7/iZtRXpu3ijwf5T

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

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

Processes:

svchost.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\bltrzhst = "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

Processes:

netsh.exe

pid process

2556 netsh.exe

pid	process
2556	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\bltrzhst\ImagePath = "C:\\Windows\\SysWOW64\\bltrzhst\\gnlwbwky.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

2372 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

gnlwbwky.exe

pid process

2612 gnlwbwky.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

gnlwbwky.exe

description pid process target process

PID 2612 set thread context of 2372 2612 gnlwbwky.exe svchost.exe
Launches sc.exe 3 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exesc.exesc.exe

pid process

2900 sc.exe
568 sc.exe
2744 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2372	svchost.exe

pid	process
2612	gnlwbwky.exe

description	pid	process	target process
PID 2612 set thread context of 2372	2612	gnlwbwky.exe	svchost.exe

pid	process
2900	sc.exe
568	sc.exe
2744	sc.exe

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

Processes:

netsh.exe

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

Processes:

02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exesc.exesc.exenetsh.execmd.execmd.exesc.exegnlwbwky.exesvchost.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.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
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	gnlwbwky.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exegnlwbwky.exe

description	pid	process	target process
PID 1904 wrote to memory of 2792	1904	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	cmd.exe
PID 1904 wrote to memory of 2792	1904	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	cmd.exe
PID 1904 wrote to memory of 2792	1904	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	cmd.exe
PID 1904 wrote to memory of 2792	1904	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	cmd.exe
PID 1904 wrote to memory of 2788	1904	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	cmd.exe
PID 1904 wrote to memory of 2788	1904	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	cmd.exe
PID 1904 wrote to memory of 2788	1904	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	cmd.exe
PID 1904 wrote to memory of 2788	1904	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	cmd.exe
PID 1904 wrote to memory of 2744	1904	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	sc.exe
PID 1904 wrote to memory of 2744	1904	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	sc.exe
PID 1904 wrote to memory of 2744	1904	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	sc.exe
PID 1904 wrote to memory of 2744	1904	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	sc.exe
PID 1904 wrote to memory of 2900	1904	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	sc.exe
PID 1904 wrote to memory of 2900	1904	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	sc.exe
PID 1904 wrote to memory of 2900	1904	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	sc.exe
PID 1904 wrote to memory of 2900	1904	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	sc.exe
PID 1904 wrote to memory of 568	1904	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	sc.exe
PID 1904 wrote to memory of 568	1904	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	sc.exe
PID 1904 wrote to memory of 568	1904	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	sc.exe
PID 1904 wrote to memory of 568	1904	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	sc.exe
PID 1904 wrote to memory of 2556	1904	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	netsh.exe
PID 1904 wrote to memory of 2556	1904	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	netsh.exe
PID 1904 wrote to memory of 2556	1904	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	netsh.exe
PID 1904 wrote to memory of 2556	1904	02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe	netsh.exe
PID 2612 wrote to memory of 2372	2612	gnlwbwky.exe	svchost.exe
PID 2612 wrote to memory of 2372	2612	gnlwbwky.exe	svchost.exe
PID 2612 wrote to memory of 2372	2612	gnlwbwky.exe	svchost.exe
PID 2612 wrote to memory of 2372	2612	gnlwbwky.exe	svchost.exe
PID 2612 wrote to memory of 2372	2612	gnlwbwky.exe	svchost.exe
PID 2612 wrote to memory of 2372	2612	gnlwbwky.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1904
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bltrzhst\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2792
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gnlwbwky.exe" C:\Windows\SysWOW64\bltrzhst\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2788
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create bltrzhst binPath= "C:\Windows\SysWOW64\bltrzhst\gnlwbwky.exe /d\"C:\Users\Admin\AppData\Local\Temp\02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2744
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description bltrzhst "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2900
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start bltrzhst
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:568
- 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:2556

C:\Windows\SysWOW64\bltrzhst\gnlwbwky.exe
C:\Windows\SysWOW64\bltrzhst\gnlwbwky.exe /d"C:\Users\Admin\AppData\Local\Temp\02a4be2bb32a8c16aeccc58a036fb973_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2612
- 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:2372

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

1

T1569

Service Execution

1

T1569.002

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Defense Evasion

Impair Defenses

2

T1562

Disable or Modify System Firewall

1

T1562.004

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\gnlwbwky.exe

Filesize
11.7MB

MD5
f494fe8cf5d5777ab2d622407d74da10

SHA1
28645afe1d13ba9c0326ff9e5915bd0e9833a1f6

SHA256
1bb1b70fc6896d513c9e3da33e7220ddc5f64f4676a8a466dc8e982b20232484

SHA512
72fa5f6cc5512956eb3253e8e2f1934b02eaca89a44844f7ae8569814279d81a65e37d5a668dfe7c604ea3d40463e952f0c9b753f1bf24bf9415168875aaaff0

Download Submit
memory/1904-9-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/1904-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1904-2-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/1904-8-0x0000000000400000-0x000000000086B000-memory.dmp

Filesize
4.4MB

Download
memory/1904-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1904-1-0x0000000000950000-0x0000000000A50000-memory.dmp

Filesize
1024KB

Download
memory/2372-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2372-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2372-14-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2372-16-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2372-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2612-17-0x0000000000400000-0x000000000086B000-memory.dmp

Filesize
4.4MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads