tofsee | 16ad57aecbfa943ed105d550c94a348aa013c8dea6b3e9281b317d464d74d9f6

General

Target

e3b05fdf50cf2ba019181a935c1fdde5_JaffaCakes118.exe
Size

12.6MB
MD5

e3b05fdf50cf2ba019181a935c1fdde5
SHA1

8b5aaf25c9f5001089b7b60380e3173c5d98f8dc
SHA256

16ad57aecbfa943ed105d550c94a348aa013c8dea6b3e9281b317d464d74d9f6
SHA512

e5e3586be6916888237dfac294ab57c753212f270efd4f9c4c8206912fc953bcdcb21a2400797266e1e0ada4ae69bde0a1cdd274f9a52407edd077d123909e8b
SSDEEP

24576:iBYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYP:i

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
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

2368 netsh.exe

pid	process
2368	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\lsyyefqa\ImagePath = "C:\\Windows\\SysWOW64\\lsyyefqa\\nzuryxxl.exe"	svchost.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

e3b05fdf50cf2ba019181a935c1fdde5_JaffaCakes118.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-523280732-2327480845-3730041215-1000\Control Panel\International\Geo\Nation	e3b05fdf50cf2ba019181a935c1fdde5_JaffaCakes118.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

788 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

nzuryxxl.exe

pid process

5104 nzuryxxl.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

nzuryxxl.exe

description pid process target process

PID 5104 set thread context of 788 5104 nzuryxxl.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

1320 sc.exe
2504 sc.exe
2944 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
788	svchost.exe

pid	process
5104	nzuryxxl.exe

description	pid	process	target process
PID 5104 set thread context of 788	5104	nzuryxxl.exe	svchost.exe

pid	process
1320	sc.exe
2504	sc.exe
2944	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

Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid pid_target process target process

4856 4444 WerFault.exe e3b05fdf50cf2ba019181a935c1fdde5_JaffaCakes118.exe
2656 5104 WerFault.exe nzuryxxl.exe

pid	pid_target	process	target process
4856	4444	WerFault.exe	e3b05fdf50cf2ba019181a935c1fdde5_JaffaCakes118.exe
2656	5104	WerFault.exe	nzuryxxl.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:

e3b05fdf50cf2ba019181a935c1fdde5_JaffaCakes118.execmd.execmd.exesc.exesvchost.exesc.exesc.exenetsh.exenzuryxxl.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e3b05fdf50cf2ba019181a935c1fdde5_JaffaCakes118.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	svchost.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	nzuryxxl.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

e3b05fdf50cf2ba019181a935c1fdde5_JaffaCakes118.exenzuryxxl.exe

description	pid	process	target process
PID 4444 wrote to memory of 2756	4444	e3b05fdf50cf2ba019181a935c1fdde5_JaffaCakes118.exe	cmd.exe
PID 4444 wrote to memory of 2756	4444	e3b05fdf50cf2ba019181a935c1fdde5_JaffaCakes118.exe	cmd.exe
PID 4444 wrote to memory of 2756	4444	e3b05fdf50cf2ba019181a935c1fdde5_JaffaCakes118.exe	cmd.exe
PID 4444 wrote to memory of 3904	4444	e3b05fdf50cf2ba019181a935c1fdde5_JaffaCakes118.exe	cmd.exe
PID 4444 wrote to memory of 3904	4444	e3b05fdf50cf2ba019181a935c1fdde5_JaffaCakes118.exe	cmd.exe
PID 4444 wrote to memory of 3904	4444	e3b05fdf50cf2ba019181a935c1fdde5_JaffaCakes118.exe	cmd.exe
PID 4444 wrote to memory of 1320	4444	e3b05fdf50cf2ba019181a935c1fdde5_JaffaCakes118.exe	sc.exe
PID 4444 wrote to memory of 1320	4444	e3b05fdf50cf2ba019181a935c1fdde5_JaffaCakes118.exe	sc.exe
PID 4444 wrote to memory of 1320	4444	e3b05fdf50cf2ba019181a935c1fdde5_JaffaCakes118.exe	sc.exe
PID 4444 wrote to memory of 2504	4444	e3b05fdf50cf2ba019181a935c1fdde5_JaffaCakes118.exe	sc.exe
PID 4444 wrote to memory of 2504	4444	e3b05fdf50cf2ba019181a935c1fdde5_JaffaCakes118.exe	sc.exe
PID 4444 wrote to memory of 2504	4444	e3b05fdf50cf2ba019181a935c1fdde5_JaffaCakes118.exe	sc.exe
PID 4444 wrote to memory of 2944	4444	e3b05fdf50cf2ba019181a935c1fdde5_JaffaCakes118.exe	sc.exe
PID 4444 wrote to memory of 2944	4444	e3b05fdf50cf2ba019181a935c1fdde5_JaffaCakes118.exe	sc.exe
PID 4444 wrote to memory of 2944	4444	e3b05fdf50cf2ba019181a935c1fdde5_JaffaCakes118.exe	sc.exe
PID 4444 wrote to memory of 2368	4444	e3b05fdf50cf2ba019181a935c1fdde5_JaffaCakes118.exe	netsh.exe
PID 4444 wrote to memory of 2368	4444	e3b05fdf50cf2ba019181a935c1fdde5_JaffaCakes118.exe	netsh.exe
PID 4444 wrote to memory of 2368	4444	e3b05fdf50cf2ba019181a935c1fdde5_JaffaCakes118.exe	netsh.exe
PID 5104 wrote to memory of 788	5104	nzuryxxl.exe	svchost.exe
PID 5104 wrote to memory of 788	5104	nzuryxxl.exe	svchost.exe
PID 5104 wrote to memory of 788	5104	nzuryxxl.exe	svchost.exe
PID 5104 wrote to memory of 788	5104	nzuryxxl.exe	svchost.exe
PID 5104 wrote to memory of 788	5104	nzuryxxl.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\e3b05fdf50cf2ba019181a935c1fdde5_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\e3b05fdf50cf2ba019181a935c1fdde5_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4444
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lsyyefqa\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2756
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nzuryxxl.exe" C:\Windows\SysWOW64\lsyyefqa\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3904
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create lsyyefqa binPath= "C:\Windows\SysWOW64\lsyyefqa\nzuryxxl.exe /d\"C:\Users\Admin\AppData\Local\Temp\e3b05fdf50cf2ba019181a935c1fdde5_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1320
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description lsyyefqa "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2504
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start lsyyefqa
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2944
- 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:2368
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4444 -s 1236
  2⤵
  - Program crash
  PID:4856

C:\Windows\SysWOW64\lsyyefqa\nzuryxxl.exe
C:\Windows\SysWOW64\lsyyefqa\nzuryxxl.exe /d"C:\Users\Admin\AppData\Local\Temp\e3b05fdf50cf2ba019181a935c1fdde5_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5104
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:788
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5104 -s 532
  2⤵
  - Program crash
  PID:2656

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 4444 -ip 4444
1⤵
PID:4260

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 5104 -ip 5104
1⤵
PID:3552

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

1

T1562

Disable or Modify System Firewall

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

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\nzuryxxl.exe

Filesize
14.5MB

MD5
cc53591e5405f56cea855a544ad01c45

SHA1
d7fff82f18e39e482979039ae331eae2305c273a

SHA256
c1c977a5511940bbe9d2fa5462d1e0adbf00bceb83d9cd3adbe7ec5f507a8c8e

SHA512
21f4583e58966f9117aa6a13036436ae7eaaa969b57f735cd88859031ce879715163f514d38a762e0204347a1fda95b62eade9667381269b1fd2d4b44ba8c548

Download Submit
memory/788-14-0x0000000000760000-0x0000000000775000-memory.dmp

Filesize
84KB

Download
memory/788-19-0x0000000000760000-0x0000000000775000-memory.dmp

Filesize
84KB

Download
memory/788-16-0x0000000000760000-0x0000000000775000-memory.dmp

Filesize
84KB

Download
memory/4444-9-0x0000000000600000-0x0000000000613000-memory.dmp

Filesize
76KB

Download
memory/4444-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4444-1-0x0000000000630000-0x0000000000730000-memory.dmp

Filesize
1024KB

Download
memory/4444-8-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/4444-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4444-2-0x0000000000600000-0x0000000000613000-memory.dmp

Filesize
76KB

Download
memory/5104-13-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/5104-11-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/5104-12-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/5104-18-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads