tofsee | a5eb7b712c179c271096f6119985b67303d0c18875f33d7ea5cf2fdbcf41dd72

General

Target

18840d0fd7d8bd428acafd42d8a85cf0_JaffaCakes118.exe
Size

11.6MB
MD5

18840d0fd7d8bd428acafd42d8a85cf0
SHA1

96aaf420d989c98f571d4609d28ab733b89ad070
SHA256

a5eb7b712c179c271096f6119985b67303d0c18875f33d7ea5cf2fdbcf41dd72
SHA512

628118fb72328ba29fe8d30a9f283231c4d4a1789aa4a75812c4276d475bb0734c118fe45bb6a57c1ddb6ddffdd8e42f4eb5edb8f3f4488986d4c51830ece4da
SSDEEP

3072:jMvoJ8oyOUQmaEa1otqKjHJSQEb/PUNnrU0vyHeN2hFRsGcPEH/UnpkWxeVxENOY:jMvw8F3QDEFgIpb8U92ebznbxe4

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
3516	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\vnpkynik\ImagePath = "C:\\Windows\\SysWOW64\\vnpkynik\\fkgywzl.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-1-5-21-656926755-4116854191-210765258-1000\Control Panel\International\Geo\Nation	18840d0fd7d8bd428acafd42d8a85cf0_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
376	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
716	fkgywzl.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 716 set thread context of 376	716	fkgywzl.exe	97

Launches sc.exe 3 IoCs

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

pid	Process
2528	sc.exe
4892	sc.exe
2392	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 value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fkgywzl.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	18840d0fd7d8bd428acafd42d8a85cf0_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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3736 wrote to memory of 776	3736	18840d0fd7d8bd428acafd42d8a85cf0_JaffaCakes118.exe	84
PID 3736 wrote to memory of 776	3736	18840d0fd7d8bd428acafd42d8a85cf0_JaffaCakes118.exe	84
PID 3736 wrote to memory of 776	3736	18840d0fd7d8bd428acafd42d8a85cf0_JaffaCakes118.exe	84
PID 3736 wrote to memory of 552	3736	18840d0fd7d8bd428acafd42d8a85cf0_JaffaCakes118.exe	86
PID 3736 wrote to memory of 552	3736	18840d0fd7d8bd428acafd42d8a85cf0_JaffaCakes118.exe	86
PID 3736 wrote to memory of 552	3736	18840d0fd7d8bd428acafd42d8a85cf0_JaffaCakes118.exe	86
PID 3736 wrote to memory of 2392	3736	18840d0fd7d8bd428acafd42d8a85cf0_JaffaCakes118.exe	88
PID 3736 wrote to memory of 2392	3736	18840d0fd7d8bd428acafd42d8a85cf0_JaffaCakes118.exe	88
PID 3736 wrote to memory of 2392	3736	18840d0fd7d8bd428acafd42d8a85cf0_JaffaCakes118.exe	88
PID 3736 wrote to memory of 2528	3736	18840d0fd7d8bd428acafd42d8a85cf0_JaffaCakes118.exe	90
PID 3736 wrote to memory of 2528	3736	18840d0fd7d8bd428acafd42d8a85cf0_JaffaCakes118.exe	90
PID 3736 wrote to memory of 2528	3736	18840d0fd7d8bd428acafd42d8a85cf0_JaffaCakes118.exe	90
PID 3736 wrote to memory of 4892	3736	18840d0fd7d8bd428acafd42d8a85cf0_JaffaCakes118.exe	92
PID 3736 wrote to memory of 4892	3736	18840d0fd7d8bd428acafd42d8a85cf0_JaffaCakes118.exe	92
PID 3736 wrote to memory of 4892	3736	18840d0fd7d8bd428acafd42d8a85cf0_JaffaCakes118.exe	92
PID 3736 wrote to memory of 3516	3736	18840d0fd7d8bd428acafd42d8a85cf0_JaffaCakes118.exe	95
PID 3736 wrote to memory of 3516	3736	18840d0fd7d8bd428acafd42d8a85cf0_JaffaCakes118.exe	95
PID 3736 wrote to memory of 3516	3736	18840d0fd7d8bd428acafd42d8a85cf0_JaffaCakes118.exe	95
PID 716 wrote to memory of 376	716	fkgywzl.exe	97
PID 716 wrote to memory of 376	716	fkgywzl.exe	97
PID 716 wrote to memory of 376	716	fkgywzl.exe	97
PID 716 wrote to memory of 376	716	fkgywzl.exe	97
PID 716 wrote to memory of 376	716	fkgywzl.exe	97

C:\Users\Admin\AppData\Local\Temp\18840d0fd7d8bd428acafd42d8a85cf0_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\18840d0fd7d8bd428acafd42d8a85cf0_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3736
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vnpkynik\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:776
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\fkgywzl.exe" C:\Windows\SysWOW64\vnpkynik\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:552
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create vnpkynik binPath= "C:\Windows\SysWOW64\vnpkynik\fkgywzl.exe /d\"C:\Users\Admin\AppData\Local\Temp\18840d0fd7d8bd428acafd42d8a85cf0_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2392
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description vnpkynik "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2528
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start vnpkynik
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4892
- 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:3516

C:\Windows\SysWOW64\vnpkynik\fkgywzl.exe
C:\Windows\SysWOW64\vnpkynik\fkgywzl.exe /d"C:\Users\Admin\AppData\Local\Temp\18840d0fd7d8bd428acafd42d8a85cf0_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:716
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:376

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

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
14.5MB

MD5
25f727f7380397e49b523ce2897a01a8

SHA1
62ed380ef6ee2a3acb59a211490bb32293c3d43b

SHA256
5ca2c095131784028e78d6a3806c9a861d5d154e7fa6104ade8da412feb99207

SHA512
c6952ac9b81be2b4c273438a47bbf0a9c327d5b38104e365edf6f546eda4a057dab86681011d0702cd5c3ad28f4922b4bb4a4700facbd09c5d954db347f96cd0

Download Submit
memory/376-11-0x0000000000600000-0x0000000000615000-memory.dmp

Filesize
84KB

Download
memory/376-16-0x0000000000600000-0x0000000000615000-memory.dmp

Filesize
84KB

Download
memory/376-17-0x0000000000600000-0x0000000000615000-memory.dmp

Filesize
84KB

Download
memory/716-12-0x0000000000400000-0x000000000086B000-memory.dmp

Filesize
4.4MB

Download
memory/716-14-0x0000000000400000-0x000000000086B000-memory.dmp

Filesize
4.4MB

Download
memory/3736-1-0x0000000000BC0000-0x0000000000CC0000-memory.dmp

Filesize
1024KB

Download
memory/3736-2-0x00000000009B0000-0x00000000009C3000-memory.dmp

Filesize
76KB

Download
memory/3736-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3736-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3736-9-0x00000000009B0000-0x00000000009C3000-memory.dmp

Filesize
76KB

Download
memory/3736-8-0x0000000000400000-0x000000000086B000-memory.dmp

Filesize
4.4MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads