tofsee | d1b6ff4842c5e9ed4c82f2cc8abb8c449896dd3316be09c2ad8a8e64418480d0

General

Target

87f88fbd6fc1edef8d83bfaaee8f53fe_JaffaCakes118.exe
Size

14.6MB
MD5

87f88fbd6fc1edef8d83bfaaee8f53fe
SHA1

27509f29c2b3b490cf2a7322f7f2cd828806c88f
SHA256

d1b6ff4842c5e9ed4c82f2cc8abb8c449896dd3316be09c2ad8a8e64418480d0
SHA512

08edb0c2a5be848dcca234d3f5f2df9c7ff85b54e2ec7a2ba9ed43dd0b7e7e00ad7b06eaba3b34253ef6c852596f1dbca9aaca3d5a5029585748a094a6bc9c72
SSDEEP

12288:eZlC6v/5oQU6buXH53333333333333333333333333333333333333333333333H:ebjvluXH

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
Tofsee family
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\ywtrmbq = "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

2744 netsh.exe

pid	process
2744	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\ywtrmbq\ImagePath = "C:\\Windows\\SysWOW64\\ywtrmbq\\ejfxvyk.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

2360 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

ejfxvyk.exe

pid process

2724 ejfxvyk.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

ejfxvyk.exe

description pid process target process

PID 2724 set thread context of 2360 2724 ejfxvyk.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

2948 sc.exe
3068 sc.exe
2192 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2360	svchost.exe

pid	process
2724	ejfxvyk.exe

description	pid	process	target process
PID 2724 set thread context of 2360	2724	ejfxvyk.exe	svchost.exe

pid	process
2948	sc.exe
3068	sc.exe
2192	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:

sc.exesc.exesvchost.exe87f88fbd6fc1edef8d83bfaaee8f53fe_JaffaCakes118.execmd.exesc.exenetsh.exeejfxvyk.execmd.exe

description	ioc	process
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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	87f88fbd6fc1edef8d83bfaaee8f53fe_JaffaCakes118.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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ejfxvyk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

87f88fbd6fc1edef8d83bfaaee8f53fe_JaffaCakes118.exeejfxvyk.exe

description	pid	process	target process
PID 2552 wrote to memory of 2332	2552	87f88fbd6fc1edef8d83bfaaee8f53fe_JaffaCakes118.exe	cmd.exe
PID 2552 wrote to memory of 2332	2552	87f88fbd6fc1edef8d83bfaaee8f53fe_JaffaCakes118.exe	cmd.exe
PID 2552 wrote to memory of 2332	2552	87f88fbd6fc1edef8d83bfaaee8f53fe_JaffaCakes118.exe	cmd.exe
PID 2552 wrote to memory of 2332	2552	87f88fbd6fc1edef8d83bfaaee8f53fe_JaffaCakes118.exe	cmd.exe
PID 2552 wrote to memory of 2844	2552	87f88fbd6fc1edef8d83bfaaee8f53fe_JaffaCakes118.exe	cmd.exe
PID 2552 wrote to memory of 2844	2552	87f88fbd6fc1edef8d83bfaaee8f53fe_JaffaCakes118.exe	cmd.exe
PID 2552 wrote to memory of 2844	2552	87f88fbd6fc1edef8d83bfaaee8f53fe_JaffaCakes118.exe	cmd.exe
PID 2552 wrote to memory of 2844	2552	87f88fbd6fc1edef8d83bfaaee8f53fe_JaffaCakes118.exe	cmd.exe
PID 2552 wrote to memory of 2948	2552	87f88fbd6fc1edef8d83bfaaee8f53fe_JaffaCakes118.exe	sc.exe
PID 2552 wrote to memory of 2948	2552	87f88fbd6fc1edef8d83bfaaee8f53fe_JaffaCakes118.exe	sc.exe
PID 2552 wrote to memory of 2948	2552	87f88fbd6fc1edef8d83bfaaee8f53fe_JaffaCakes118.exe	sc.exe
PID 2552 wrote to memory of 2948	2552	87f88fbd6fc1edef8d83bfaaee8f53fe_JaffaCakes118.exe	sc.exe
PID 2552 wrote to memory of 3068	2552	87f88fbd6fc1edef8d83bfaaee8f53fe_JaffaCakes118.exe	sc.exe
PID 2552 wrote to memory of 3068	2552	87f88fbd6fc1edef8d83bfaaee8f53fe_JaffaCakes118.exe	sc.exe
PID 2552 wrote to memory of 3068	2552	87f88fbd6fc1edef8d83bfaaee8f53fe_JaffaCakes118.exe	sc.exe
PID 2552 wrote to memory of 3068	2552	87f88fbd6fc1edef8d83bfaaee8f53fe_JaffaCakes118.exe	sc.exe
PID 2552 wrote to memory of 2192	2552	87f88fbd6fc1edef8d83bfaaee8f53fe_JaffaCakes118.exe	sc.exe
PID 2552 wrote to memory of 2192	2552	87f88fbd6fc1edef8d83bfaaee8f53fe_JaffaCakes118.exe	sc.exe
PID 2552 wrote to memory of 2192	2552	87f88fbd6fc1edef8d83bfaaee8f53fe_JaffaCakes118.exe	sc.exe
PID 2552 wrote to memory of 2192	2552	87f88fbd6fc1edef8d83bfaaee8f53fe_JaffaCakes118.exe	sc.exe
PID 2552 wrote to memory of 2744	2552	87f88fbd6fc1edef8d83bfaaee8f53fe_JaffaCakes118.exe	netsh.exe
PID 2552 wrote to memory of 2744	2552	87f88fbd6fc1edef8d83bfaaee8f53fe_JaffaCakes118.exe	netsh.exe
PID 2552 wrote to memory of 2744	2552	87f88fbd6fc1edef8d83bfaaee8f53fe_JaffaCakes118.exe	netsh.exe
PID 2552 wrote to memory of 2744	2552	87f88fbd6fc1edef8d83bfaaee8f53fe_JaffaCakes118.exe	netsh.exe
PID 2724 wrote to memory of 2360	2724	ejfxvyk.exe	svchost.exe
PID 2724 wrote to memory of 2360	2724	ejfxvyk.exe	svchost.exe
PID 2724 wrote to memory of 2360	2724	ejfxvyk.exe	svchost.exe
PID 2724 wrote to memory of 2360	2724	ejfxvyk.exe	svchost.exe
PID 2724 wrote to memory of 2360	2724	ejfxvyk.exe	svchost.exe
PID 2724 wrote to memory of 2360	2724	ejfxvyk.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\87f88fbd6fc1edef8d83bfaaee8f53fe_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\87f88fbd6fc1edef8d83bfaaee8f53fe_JaffaCakes118.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2552
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ywtrmbq\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2332
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ejfxvyk.exe" C:\Windows\SysWOW64\ywtrmbq\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2844
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ywtrmbq binPath= "C:\Windows\SysWOW64\ywtrmbq\ejfxvyk.exe /d\"C:\Users\Admin\AppData\Local\Temp\87f88fbd6fc1edef8d83bfaaee8f53fe_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2948
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ywtrmbq "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3068
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ywtrmbq
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2192
- 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:2744

C:\Windows\SysWOW64\ywtrmbq\ejfxvyk.exe
C:\Windows\SysWOW64\ywtrmbq\ejfxvyk.exe /d"C:\Users\Admin\AppData\Local\Temp\87f88fbd6fc1edef8d83bfaaee8f53fe_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2724
- 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:2360

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

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Downloads

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

Filesize
14.6MB

MD5
32a008cdca929244f0a18e10282485e0

SHA1
39832c228e46119b316243f85b183503426304b8

SHA256
f464b3830727842580a05a240a75ff2f5d1abda9333eb1cf8398fc7b73e63d57

SHA512
8766dd4646666131919cc6bff5ba21c01dcb355e4dd8edb06fba9489d38f48e928be795f4a870d4a0cc2d3b4e6899630fd79921152935b9d7d96f4fceac13c2f

Download Submit
memory/2360-11-0x0000000000100000-0x0000000000115000-memory.dmp

Filesize
84KB

Download
memory/2360-14-0x0000000000100000-0x0000000000115000-memory.dmp

Filesize
84KB

Download
memory/2360-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2360-17-0x0000000000100000-0x0000000000115000-memory.dmp

Filesize
84KB

Download
memory/2360-18-0x0000000000100000-0x0000000000115000-memory.dmp

Filesize
84KB

Download
memory/2552-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2552-2-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2552-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2552-9-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/2552-8-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/2552-1-0x0000000000890000-0x0000000000990000-memory.dmp

Filesize
1024KB

Download
memory/2724-16-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads