tofsee | 0fd540d43aaddcc641ea611c1622ea479425fbdaf9e37c7d2bd50a2e4379ed0d

General

Target

b08871025feb002765a540f39b640fee_JaffaCakes118.exe
Size

11.8MB
MD5

b08871025feb002765a540f39b640fee
SHA1

5d4c8973edab4863d5b70f9e01ac49099997476b
SHA256

0fd540d43aaddcc641ea611c1622ea479425fbdaf9e37c7d2bd50a2e4379ed0d
SHA512

d2293d5964b8181c03b107692ddb51b197ab74aeb84fe0f8fc299db7a1aa99193f920ec997108ccc6dfe05e725fd6dfc864d344b716cdc10a64da72410507629
SSDEEP

49152:rGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGe:

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
3956	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\pcezyyoj\ImagePath = "C:\\Windows\\SysWOW64\\pcezyyoj\\ybucacku.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-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	b08871025feb002765a540f39b640fee_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
1464	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1940	ybucacku.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1940 set thread context of 1464	1940	ybucacku.exe	105

Launches sc.exe 3 IoCs

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

pid	Process
2696	sc.exe
3900	sc.exe
4432	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
880	3832	WerFault.exe	82
3668	1940	WerFault.exe	99

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	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	ybucacku.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.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	b08871025feb002765a540f39b640fee_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3832 wrote to memory of 3516	3832	b08871025feb002765a540f39b640fee_JaffaCakes118.exe	83
PID 3832 wrote to memory of 3516	3832	b08871025feb002765a540f39b640fee_JaffaCakes118.exe	83
PID 3832 wrote to memory of 3516	3832	b08871025feb002765a540f39b640fee_JaffaCakes118.exe	83
PID 3832 wrote to memory of 4696	3832	b08871025feb002765a540f39b640fee_JaffaCakes118.exe	85
PID 3832 wrote to memory of 4696	3832	b08871025feb002765a540f39b640fee_JaffaCakes118.exe	85
PID 3832 wrote to memory of 4696	3832	b08871025feb002765a540f39b640fee_JaffaCakes118.exe	85
PID 3832 wrote to memory of 3900	3832	b08871025feb002765a540f39b640fee_JaffaCakes118.exe	89
PID 3832 wrote to memory of 3900	3832	b08871025feb002765a540f39b640fee_JaffaCakes118.exe	89
PID 3832 wrote to memory of 3900	3832	b08871025feb002765a540f39b640fee_JaffaCakes118.exe	89
PID 3832 wrote to memory of 4432	3832	b08871025feb002765a540f39b640fee_JaffaCakes118.exe	91
PID 3832 wrote to memory of 4432	3832	b08871025feb002765a540f39b640fee_JaffaCakes118.exe	91
PID 3832 wrote to memory of 4432	3832	b08871025feb002765a540f39b640fee_JaffaCakes118.exe	91
PID 3832 wrote to memory of 2696	3832	b08871025feb002765a540f39b640fee_JaffaCakes118.exe	95
PID 3832 wrote to memory of 2696	3832	b08871025feb002765a540f39b640fee_JaffaCakes118.exe	95
PID 3832 wrote to memory of 2696	3832	b08871025feb002765a540f39b640fee_JaffaCakes118.exe	95
PID 3832 wrote to memory of 3956	3832	b08871025feb002765a540f39b640fee_JaffaCakes118.exe	100
PID 3832 wrote to memory of 3956	3832	b08871025feb002765a540f39b640fee_JaffaCakes118.exe	100
PID 3832 wrote to memory of 3956	3832	b08871025feb002765a540f39b640fee_JaffaCakes118.exe	100
PID 1940 wrote to memory of 1464	1940	ybucacku.exe	105
PID 1940 wrote to memory of 1464	1940	ybucacku.exe	105
PID 1940 wrote to memory of 1464	1940	ybucacku.exe	105
PID 1940 wrote to memory of 1464	1940	ybucacku.exe	105
PID 1940 wrote to memory of 1464	1940	ybucacku.exe	105

C:\Users\Admin\AppData\Local\Temp\b08871025feb002765a540f39b640fee_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\b08871025feb002765a540f39b640fee_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3832
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\pcezyyoj\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3516
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ybucacku.exe" C:\Windows\SysWOW64\pcezyyoj\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4696
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create pcezyyoj binPath= "C:\Windows\SysWOW64\pcezyyoj\ybucacku.exe /d\"C:\Users\Admin\AppData\Local\Temp\b08871025feb002765a540f39b640fee_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3900
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description pcezyyoj "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4432
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start pcezyyoj
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2696
- 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:3956
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3832 -s 1160
  2⤵
  - Program crash
  PID:880

C:\Windows\SysWOW64\pcezyyoj\ybucacku.exe
C:\Windows\SysWOW64\pcezyyoj\ybucacku.exe /d"C:\Users\Admin\AppData\Local\Temp\b08871025feb002765a540f39b640fee_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1940
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1464
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1940 -s 552
  2⤵
  - Program crash
  PID:3668

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 3832 -ip 3832
1⤵
PID:2400

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 544 -p 1940 -ip 1940
1⤵
PID:3044

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\ybucacku.exe

Filesize
10.1MB

MD5
c7bdf480043b67537cf5d49e41055f34

SHA1
4472c3a544372539f66e3e425b039a54bb59c9d3

SHA256
7c900c0a8a3178a5bf4cf533ee1d0a4960814101f9067ae75ea90ca6961e0e9a

SHA512
92cd118dc06fbc2d9fa1ebc3ff7269c4732dc8dd5ccd4a7c069ab563aef128d7d7b2a18168a797601aa09e67e5de6f143e62f0182fa5ba37ad1c0b1a528fc833

Download Submit
memory/1464-14-0x0000000000600000-0x0000000000615000-memory.dmp

Filesize
84KB

Download
memory/1464-17-0x0000000000600000-0x0000000000615000-memory.dmp

Filesize
84KB

Download
memory/1464-16-0x0000000000600000-0x0000000000615000-memory.dmp

Filesize
84KB

Download
memory/1940-13-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/1940-12-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/1940-11-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/1940-19-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/3832-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3832-9-0x0000000002190000-0x00000000021A3000-memory.dmp

Filesize
76KB

Download
memory/3832-1-0x00000000004B0000-0x00000000005B0000-memory.dmp

Filesize
1024KB

Download
memory/3832-8-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/3832-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3832-2-0x0000000002190000-0x00000000021A3000-memory.dmp

Filesize
76KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads