tofsee | 55a9f1cbe6fddf300a447d937630db33f557bfa3c3f7eb9209e3416775029666

General

Target

cb2054f02e24360d28f3f4ef40dbfd58_JaffaCakes118.exe
Size

10.1MB
MD5

cb2054f02e24360d28f3f4ef40dbfd58
SHA1

4843dc886cf394697eeb6e8ed842f1fe05d66576
SHA256

55a9f1cbe6fddf300a447d937630db33f557bfa3c3f7eb9209e3416775029666
SHA512

d83df9267a18e5a7012dbb24796f6646951c30d3655ab938917f33a668d7e6ec4a1cab09339b07d717bdffa0ed845d574582342d542890b684d72affc6157b3e
SSDEEP

24576:ZMLXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX3:ZM

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
2568	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\jexbzzgf\ImagePath = "C:\\Windows\\SysWOW64\\jexbzzgf\\wfrxhcyo.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-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	cb2054f02e24360d28f3f4ef40dbfd58_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
1716	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
924	wfrxhcyo.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 924 set thread context of 1716	924	wfrxhcyo.exe	106

Launches sc.exe 3 IoCs

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

pid	Process
4872	sc.exe
2264	sc.exe
1380	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 2 IoCs

pid	pid_target	Process	procid_target
4036	208	WerFault.exe	82
3208	924	WerFault.exe	94

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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wfrxhcyo.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cb2054f02e24360d28f3f4ef40dbfd58_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	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 208 wrote to memory of 4076	208	cb2054f02e24360d28f3f4ef40dbfd58_JaffaCakes118.exe	83
PID 208 wrote to memory of 4076	208	cb2054f02e24360d28f3f4ef40dbfd58_JaffaCakes118.exe	83
PID 208 wrote to memory of 4076	208	cb2054f02e24360d28f3f4ef40dbfd58_JaffaCakes118.exe	83
PID 208 wrote to memory of 1712	208	cb2054f02e24360d28f3f4ef40dbfd58_JaffaCakes118.exe	85
PID 208 wrote to memory of 1712	208	cb2054f02e24360d28f3f4ef40dbfd58_JaffaCakes118.exe	85
PID 208 wrote to memory of 1712	208	cb2054f02e24360d28f3f4ef40dbfd58_JaffaCakes118.exe	85
PID 208 wrote to memory of 1380	208	cb2054f02e24360d28f3f4ef40dbfd58_JaffaCakes118.exe	88
PID 208 wrote to memory of 1380	208	cb2054f02e24360d28f3f4ef40dbfd58_JaffaCakes118.exe	88
PID 208 wrote to memory of 1380	208	cb2054f02e24360d28f3f4ef40dbfd58_JaffaCakes118.exe	88
PID 208 wrote to memory of 4872	208	cb2054f02e24360d28f3f4ef40dbfd58_JaffaCakes118.exe	90
PID 208 wrote to memory of 4872	208	cb2054f02e24360d28f3f4ef40dbfd58_JaffaCakes118.exe	90
PID 208 wrote to memory of 4872	208	cb2054f02e24360d28f3f4ef40dbfd58_JaffaCakes118.exe	90
PID 208 wrote to memory of 2264	208	cb2054f02e24360d28f3f4ef40dbfd58_JaffaCakes118.exe	92
PID 208 wrote to memory of 2264	208	cb2054f02e24360d28f3f4ef40dbfd58_JaffaCakes118.exe	92
PID 208 wrote to memory of 2264	208	cb2054f02e24360d28f3f4ef40dbfd58_JaffaCakes118.exe	92
PID 208 wrote to memory of 2568	208	cb2054f02e24360d28f3f4ef40dbfd58_JaffaCakes118.exe	95
PID 208 wrote to memory of 2568	208	cb2054f02e24360d28f3f4ef40dbfd58_JaffaCakes118.exe	95
PID 208 wrote to memory of 2568	208	cb2054f02e24360d28f3f4ef40dbfd58_JaffaCakes118.exe	95
PID 924 wrote to memory of 1716	924	wfrxhcyo.exe	106
PID 924 wrote to memory of 1716	924	wfrxhcyo.exe	106
PID 924 wrote to memory of 1716	924	wfrxhcyo.exe	106
PID 924 wrote to memory of 1716	924	wfrxhcyo.exe	106
PID 924 wrote to memory of 1716	924	wfrxhcyo.exe	106

C:\Users\Admin\AppData\Local\Temp\cb2054f02e24360d28f3f4ef40dbfd58_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\cb2054f02e24360d28f3f4ef40dbfd58_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:208
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jexbzzgf\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4076
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\wfrxhcyo.exe" C:\Windows\SysWOW64\jexbzzgf\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1712
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create jexbzzgf binPath= "C:\Windows\SysWOW64\jexbzzgf\wfrxhcyo.exe /d\"C:\Users\Admin\AppData\Local\Temp\cb2054f02e24360d28f3f4ef40dbfd58_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1380
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description jexbzzgf "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4872
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start jexbzzgf
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2264
- 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:2568
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 208 -s 1040
  2⤵
  - Program crash
  PID:4036

C:\Windows\SysWOW64\jexbzzgf\wfrxhcyo.exe
C:\Windows\SysWOW64\jexbzzgf\wfrxhcyo.exe /d"C:\Users\Admin\AppData\Local\Temp\cb2054f02e24360d28f3f4ef40dbfd58_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:924
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1716
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 924 -s 524
  2⤵
  - Program crash
  PID:3208

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 208 -ip 208
1⤵
PID:4588

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 924 -ip 924
1⤵
PID:4448

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\wfrxhcyo.exe

Filesize
13.0MB

MD5
b5d09b36e38eb37fa69eb9afdeccee3b

SHA1
debaddc7efd710af5e583edd1ecb9dd34174408b

SHA256
fb2847a97a8ec5823a5f3aff50a6c5bccf7d16cc38418f2d57214b0533c95df3

SHA512
9364491917c9d878870d0b5afb09f253fdb0b7d40f56a9b6f474fd1ade6b9267d050a4e5bbeaf7102aeb155a52cbbafd3283ce9460a561d75ad8d3399cbf1936

Download Submit
memory/208-1-0x0000000002EC0000-0x0000000002FC0000-memory.dmp

Filesize
1024KB

Download
memory/208-2-0x00000000049B0000-0x00000000049C3000-memory.dmp

Filesize
76KB

Download
memory/208-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/208-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/208-9-0x00000000049B0000-0x00000000049C3000-memory.dmp

Filesize
76KB

Download
memory/208-8-0x0000000000400000-0x0000000002C6D000-memory.dmp

Filesize
40.4MB

Download
memory/924-15-0x0000000000400000-0x0000000002C6D000-memory.dmp

Filesize
40.4MB

Download
memory/1716-11-0x0000000000700000-0x0000000000715000-memory.dmp

Filesize
84KB

Download
memory/1716-13-0x0000000000700000-0x0000000000715000-memory.dmp

Filesize
84KB

Download
memory/1716-14-0x0000000000700000-0x0000000000715000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads