tofsee | d8d16e6a3d74584f449401e39157dc1b788dc1d59ebab958aab95440a08a4d2c

General

Target

JaffaCakes118_d8d16e6a3d74584f449401e39157dc1b788dc1d59ebab958aab95440a08a4d2c.exe
Size

211KB
MD5

cdfe1a0520846256701a835f7997200c
SHA1

d70c426398a6de0e2cde8ebcac5bff1bd4dd2161
SHA256

d8d16e6a3d74584f449401e39157dc1b788dc1d59ebab958aab95440a08a4d2c
SHA512

7d67ec32def188bd799ce753801ce302f95aaeae9e587c48d94fde22fe0f7122091cccc3ed39271e2fa64667d0232dc1d2684547dc348bf257e94d5e4652f87e
SSDEEP

3072:CzpWiQngo/AxJ9v12IJZEOixWoT3BCrz85p1bSTgUfrdGZPwYKB1F5NSlAhgC:CzpWgHxjhZZixnrUn8HWGVq1F5QC

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
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
2000	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\gcbtjllz\ImagePath = "C:\\Windows\\SysWOW64\\gcbtjllz\\cwsyjtlr.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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	JaffaCakes118_d8d16e6a3d74584f449401e39157dc1b788dc1d59ebab958aab95440a08a4d2c.exe

Deletes itself 1 IoCs

pid	Process
1328	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2396	cwsyjtlr.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2396 set thread context of 1328	2396	cwsyjtlr.exe	98

Launches sc.exe 3 IoCs

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

pid	Process
1988	sc.exe
408	sc.exe
4696	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

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2756	4064	WerFault.exe	81

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	JaffaCakes118_d8d16e6a3d74584f449401e39157dc1b788dc1d59ebab958aab95440a08a4d2c.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cwsyjtlr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4064 wrote to memory of 4964	4064	JaffaCakes118_d8d16e6a3d74584f449401e39157dc1b788dc1d59ebab958aab95440a08a4d2c.exe	82
PID 4064 wrote to memory of 4964	4064	JaffaCakes118_d8d16e6a3d74584f449401e39157dc1b788dc1d59ebab958aab95440a08a4d2c.exe	82
PID 4064 wrote to memory of 4964	4064	JaffaCakes118_d8d16e6a3d74584f449401e39157dc1b788dc1d59ebab958aab95440a08a4d2c.exe	82
PID 4064 wrote to memory of 3804	4064	JaffaCakes118_d8d16e6a3d74584f449401e39157dc1b788dc1d59ebab958aab95440a08a4d2c.exe	84
PID 4064 wrote to memory of 3804	4064	JaffaCakes118_d8d16e6a3d74584f449401e39157dc1b788dc1d59ebab958aab95440a08a4d2c.exe	84
PID 4064 wrote to memory of 3804	4064	JaffaCakes118_d8d16e6a3d74584f449401e39157dc1b788dc1d59ebab958aab95440a08a4d2c.exe	84
PID 4064 wrote to memory of 4696	4064	JaffaCakes118_d8d16e6a3d74584f449401e39157dc1b788dc1d59ebab958aab95440a08a4d2c.exe	86
PID 4064 wrote to memory of 4696	4064	JaffaCakes118_d8d16e6a3d74584f449401e39157dc1b788dc1d59ebab958aab95440a08a4d2c.exe	86
PID 4064 wrote to memory of 4696	4064	JaffaCakes118_d8d16e6a3d74584f449401e39157dc1b788dc1d59ebab958aab95440a08a4d2c.exe	86
PID 4064 wrote to memory of 1988	4064	JaffaCakes118_d8d16e6a3d74584f449401e39157dc1b788dc1d59ebab958aab95440a08a4d2c.exe	88
PID 4064 wrote to memory of 1988	4064	JaffaCakes118_d8d16e6a3d74584f449401e39157dc1b788dc1d59ebab958aab95440a08a4d2c.exe	88
PID 4064 wrote to memory of 1988	4064	JaffaCakes118_d8d16e6a3d74584f449401e39157dc1b788dc1d59ebab958aab95440a08a4d2c.exe	88
PID 4064 wrote to memory of 408	4064	JaffaCakes118_d8d16e6a3d74584f449401e39157dc1b788dc1d59ebab958aab95440a08a4d2c.exe	90
PID 4064 wrote to memory of 408	4064	JaffaCakes118_d8d16e6a3d74584f449401e39157dc1b788dc1d59ebab958aab95440a08a4d2c.exe	90
PID 4064 wrote to memory of 408	4064	JaffaCakes118_d8d16e6a3d74584f449401e39157dc1b788dc1d59ebab958aab95440a08a4d2c.exe	90
PID 4064 wrote to memory of 2000	4064	JaffaCakes118_d8d16e6a3d74584f449401e39157dc1b788dc1d59ebab958aab95440a08a4d2c.exe	93
PID 4064 wrote to memory of 2000	4064	JaffaCakes118_d8d16e6a3d74584f449401e39157dc1b788dc1d59ebab958aab95440a08a4d2c.exe	93
PID 4064 wrote to memory of 2000	4064	JaffaCakes118_d8d16e6a3d74584f449401e39157dc1b788dc1d59ebab958aab95440a08a4d2c.exe	93
PID 2396 wrote to memory of 1328	2396	cwsyjtlr.exe	98
PID 2396 wrote to memory of 1328	2396	cwsyjtlr.exe	98
PID 2396 wrote to memory of 1328	2396	cwsyjtlr.exe	98
PID 2396 wrote to memory of 1328	2396	cwsyjtlr.exe	98
PID 2396 wrote to memory of 1328	2396	cwsyjtlr.exe	98

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_d8d16e6a3d74584f449401e39157dc1b788dc1d59ebab958aab95440a08a4d2c.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_d8d16e6a3d74584f449401e39157dc1b788dc1d59ebab958aab95440a08a4d2c.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4064
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\gcbtjllz\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4964
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\cwsyjtlr.exe" C:\Windows\SysWOW64\gcbtjllz\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3804
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create gcbtjllz binPath= "C:\Windows\SysWOW64\gcbtjllz\cwsyjtlr.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_d8d16e6a3d74584f449401e39157dc1b788dc1d59ebab958aab95440a08a4d2c.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4696
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description gcbtjllz "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1988
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start gcbtjllz
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:408
- 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:2000
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4064 -s 596
  2⤵
  - Program crash
  PID:2756

C:\Windows\SysWOW64\gcbtjllz\cwsyjtlr.exe
C:\Windows\SysWOW64\gcbtjllz\cwsyjtlr.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_d8d16e6a3d74584f449401e39157dc1b788dc1d59ebab958aab95440a08a4d2c.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2396
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1328

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4064 -ip 4064
1⤵
PID:2972

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

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Downloads

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

Filesize
10.8MB

MD5
b23441a97c9b3b056ba8ae918a7c1f73

SHA1
d27dc32cfc996dd852154c6d29b51ffad95e3b6c

SHA256
e34e955722c1e642a4fb4568179e00203f93811135a77ed64eee228c788c8a44

SHA512
0ed2de56b3da2fc7239aa4d43798ef8df8317f6c7eaf363d7c02054386f2e3dc62bfa17154046498e84f62bd03b9279224ed9f2f453984e41236312a86a6a0c5

Download Submit
memory/1328-11-0x00000000005B0000-0x00000000005C5000-memory.dmp

Filesize
84KB

Download
memory/1328-14-0x00000000005B0000-0x00000000005C5000-memory.dmp

Filesize
84KB

Download
memory/1328-15-0x00000000005B0000-0x00000000005C5000-memory.dmp

Filesize
84KB

Download
memory/2396-12-0x0000000000400000-0x0000000002B75000-memory.dmp

Filesize
39.5MB

Download
memory/4064-1-0x0000000002EF0000-0x0000000002FF0000-memory.dmp

Filesize
1024KB

Download
memory/4064-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/4064-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4064-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4064-9-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/4064-8-0x0000000000400000-0x0000000002B75000-memory.dmp

Filesize
39.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads