tofsee | 7a8aec1488799c958cf0ce303cdb68ff66ef92402e1d3f748ea1c2ae0e981af8

General

Target

47f7499a4be2f2bca257ec130a29c799_JaffaCakes118.exe
Size

263KB
MD5

47f7499a4be2f2bca257ec130a29c799
SHA1

cbc60f99cb19c72c50d2a30adcc076ea29c43415
SHA256

7a8aec1488799c958cf0ce303cdb68ff66ef92402e1d3f748ea1c2ae0e981af8
SHA512

5f154f95c37d273548d3e3a1b95f1b46a910e1b1e98d5bb1178f2fec9058895a62e3f0376950e343a842a864c2a1e9eb2f1a72a534a41352e6671cf903e1f61f
SSDEEP

6144:3QSKph/WvuGSEP72hDKp0gKq4IT6Odt+q7Q2GOSMfc9x7:3PUdWvuGSEP72hY0gKI6s/1JI

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

pid	Process
3504	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\vdsmmnbt\ImagePath = "C:\\Windows\\SysWOW64\\vdsmmnbt\\ysblybgs.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	47f7499a4be2f2bca257ec130a29c799_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
5056	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4912	ysblybgs.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4912 set thread context of 5056	4912	ysblybgs.exe	104

Launches sc.exe 3 IoCs

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

pid	Process
4192	sc.exe
4028	sc.exe
4340	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
3124	212	WerFault.exe	83
964	4912	WerFault.exe	97

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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	47f7499a4be2f2bca257ec130a29c799_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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ysblybgs.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	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 212 wrote to memory of 2656	212	47f7499a4be2f2bca257ec130a29c799_JaffaCakes118.exe	87
PID 212 wrote to memory of 2656	212	47f7499a4be2f2bca257ec130a29c799_JaffaCakes118.exe	87
PID 212 wrote to memory of 2656	212	47f7499a4be2f2bca257ec130a29c799_JaffaCakes118.exe	87
PID 212 wrote to memory of 3408	212	47f7499a4be2f2bca257ec130a29c799_JaffaCakes118.exe	89
PID 212 wrote to memory of 3408	212	47f7499a4be2f2bca257ec130a29c799_JaffaCakes118.exe	89
PID 212 wrote to memory of 3408	212	47f7499a4be2f2bca257ec130a29c799_JaffaCakes118.exe	89
PID 212 wrote to memory of 4192	212	47f7499a4be2f2bca257ec130a29c799_JaffaCakes118.exe	91
PID 212 wrote to memory of 4192	212	47f7499a4be2f2bca257ec130a29c799_JaffaCakes118.exe	91
PID 212 wrote to memory of 4192	212	47f7499a4be2f2bca257ec130a29c799_JaffaCakes118.exe	91
PID 212 wrote to memory of 4028	212	47f7499a4be2f2bca257ec130a29c799_JaffaCakes118.exe	93
PID 212 wrote to memory of 4028	212	47f7499a4be2f2bca257ec130a29c799_JaffaCakes118.exe	93
PID 212 wrote to memory of 4028	212	47f7499a4be2f2bca257ec130a29c799_JaffaCakes118.exe	93
PID 212 wrote to memory of 4340	212	47f7499a4be2f2bca257ec130a29c799_JaffaCakes118.exe	95
PID 212 wrote to memory of 4340	212	47f7499a4be2f2bca257ec130a29c799_JaffaCakes118.exe	95
PID 212 wrote to memory of 4340	212	47f7499a4be2f2bca257ec130a29c799_JaffaCakes118.exe	95
PID 212 wrote to memory of 3504	212	47f7499a4be2f2bca257ec130a29c799_JaffaCakes118.exe	100
PID 212 wrote to memory of 3504	212	47f7499a4be2f2bca257ec130a29c799_JaffaCakes118.exe	100
PID 212 wrote to memory of 3504	212	47f7499a4be2f2bca257ec130a29c799_JaffaCakes118.exe	100
PID 4912 wrote to memory of 5056	4912	ysblybgs.exe	104
PID 4912 wrote to memory of 5056	4912	ysblybgs.exe	104
PID 4912 wrote to memory of 5056	4912	ysblybgs.exe	104
PID 4912 wrote to memory of 5056	4912	ysblybgs.exe	104
PID 4912 wrote to memory of 5056	4912	ysblybgs.exe	104

C:\Users\Admin\AppData\Local\Temp\47f7499a4be2f2bca257ec130a29c799_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\47f7499a4be2f2bca257ec130a29c799_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:212
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vdsmmnbt\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2656
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ysblybgs.exe" C:\Windows\SysWOW64\vdsmmnbt\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3408
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create vdsmmnbt binPath= "C:\Windows\SysWOW64\vdsmmnbt\ysblybgs.exe /d\"C:\Users\Admin\AppData\Local\Temp\47f7499a4be2f2bca257ec130a29c799_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4192
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description vdsmmnbt "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4028
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start vdsmmnbt
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4340
- 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:3504
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 212 -s 1164
  2⤵
  - Program crash
  PID:3124

C:\Windows\SysWOW64\vdsmmnbt\ysblybgs.exe
C:\Windows\SysWOW64\vdsmmnbt\ysblybgs.exe /d"C:\Users\Admin\AppData\Local\Temp\47f7499a4be2f2bca257ec130a29c799_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4912
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:5056
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4912 -s 508
  2⤵
  - Program crash
  PID:964

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 212 -ip 212
1⤵
PID:3268

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 4912 -ip 4912
1⤵
PID:4836

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\ysblybgs.exe

Filesize
14.1MB

MD5
97f7349197a527096e640b36814299d0

SHA1
bc07dbcc2a7ae9acd62538d22d33b540c8e35b3c

SHA256
5d167de798126715399622d68979993724eedf98b96c9b0615fa1f3afa169f1c

SHA512
37cfbca127d85330f6bc81e604dac201d3e5fe5bd39430af3b45df53794ebe9fd13f5ba99a915470addfd44d804c7896297f2d1b3b172e785c0d3c7a38d2dac9

Download Submit
memory/212-14-0x00000000001E0000-0x00000000001F3000-memory.dmp

Filesize
76KB

Download
memory/212-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/212-2-0x00000000001E0000-0x00000000001F3000-memory.dmp

Filesize
76KB

Download
memory/212-15-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/212-1-0x0000000000C30000-0x0000000000D30000-memory.dmp

Filesize
1024KB

Download
memory/212-13-0x0000000000400000-0x0000000000871000-memory.dmp

Filesize
4.4MB

Download
memory/4912-11-0x0000000000400000-0x0000000000871000-memory.dmp

Filesize
4.4MB

Download
memory/4912-12-0x0000000000400000-0x0000000000871000-memory.dmp

Filesize
4.4MB

Download
memory/5056-8-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/5056-16-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/5056-18-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/5056-19-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/5056-20-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads