tofsee | 3299d2af046f00158fa626819958e757bef231094dce1cc1e3d2f2d30657901e

General

Target

JaffaCakes118_df111541b38a5770af185e26817f8ddc.exe
Size

14.0MB
MD5

df111541b38a5770af185e26817f8ddc
SHA1

3cb16dac04be9c17cafba3c8c4b94f4d264d5a20
SHA256

3299d2af046f00158fa626819958e757bef231094dce1cc1e3d2f2d30657901e
SHA512

177e75aedb32afea5a19b8ab9be60d3cb37dbfdcbaa017c58caf9339dfa55fd7951cabad5f9ed21544328204590c9bdb4ebde0b02944bba0d093ea5a6ac42d74
SSDEEP

3072:OrLSAaIXFM9X/WWIyOEfEDQMZWecFKmZ:oNWktyH9V

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.ru

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
1460	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\heizlbjy\ImagePath = "C:\\Windows\\SysWOW64\\heizlbjy\\bivvyjbw.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	JaffaCakes118_df111541b38a5770af185e26817f8ddc.exe

Deletes itself 1 IoCs

pid	Process
1096	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4736	bivvyjbw.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4736 set thread context of 1096	4736	bivvyjbw.exe	94

Launches sc.exe 3 IoCs

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

pid	Process
2276	sc.exe
2020	sc.exe
2324	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

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	netsh.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	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	bivvyjbw.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_df111541b38a5770af185e26817f8ddc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4464 wrote to memory of 4024	4464	JaffaCakes118_df111541b38a5770af185e26817f8ddc.exe	83
PID 4464 wrote to memory of 4024	4464	JaffaCakes118_df111541b38a5770af185e26817f8ddc.exe	83
PID 4464 wrote to memory of 4024	4464	JaffaCakes118_df111541b38a5770af185e26817f8ddc.exe	83
PID 4464 wrote to memory of 4176	4464	JaffaCakes118_df111541b38a5770af185e26817f8ddc.exe	85
PID 4464 wrote to memory of 4176	4464	JaffaCakes118_df111541b38a5770af185e26817f8ddc.exe	85
PID 4464 wrote to memory of 4176	4464	JaffaCakes118_df111541b38a5770af185e26817f8ddc.exe	85
PID 4464 wrote to memory of 2276	4464	JaffaCakes118_df111541b38a5770af185e26817f8ddc.exe	87
PID 4464 wrote to memory of 2276	4464	JaffaCakes118_df111541b38a5770af185e26817f8ddc.exe	87
PID 4464 wrote to memory of 2276	4464	JaffaCakes118_df111541b38a5770af185e26817f8ddc.exe	87
PID 4464 wrote to memory of 2020	4464	JaffaCakes118_df111541b38a5770af185e26817f8ddc.exe	89
PID 4464 wrote to memory of 2020	4464	JaffaCakes118_df111541b38a5770af185e26817f8ddc.exe	89
PID 4464 wrote to memory of 2020	4464	JaffaCakes118_df111541b38a5770af185e26817f8ddc.exe	89
PID 4464 wrote to memory of 2324	4464	JaffaCakes118_df111541b38a5770af185e26817f8ddc.exe	91
PID 4464 wrote to memory of 2324	4464	JaffaCakes118_df111541b38a5770af185e26817f8ddc.exe	91
PID 4464 wrote to memory of 2324	4464	JaffaCakes118_df111541b38a5770af185e26817f8ddc.exe	91
PID 4736 wrote to memory of 1096	4736	bivvyjbw.exe	94
PID 4736 wrote to memory of 1096	4736	bivvyjbw.exe	94
PID 4736 wrote to memory of 1096	4736	bivvyjbw.exe	94
PID 4736 wrote to memory of 1096	4736	bivvyjbw.exe	94
PID 4736 wrote to memory of 1096	4736	bivvyjbw.exe	94
PID 4464 wrote to memory of 1460	4464	JaffaCakes118_df111541b38a5770af185e26817f8ddc.exe	95
PID 4464 wrote to memory of 1460	4464	JaffaCakes118_df111541b38a5770af185e26817f8ddc.exe	95
PID 4464 wrote to memory of 1460	4464	JaffaCakes118_df111541b38a5770af185e26817f8ddc.exe	95

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_df111541b38a5770af185e26817f8ddc.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_df111541b38a5770af185e26817f8ddc.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4464
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\heizlbjy\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4024
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bivvyjbw.exe" C:\Windows\SysWOW64\heizlbjy\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4176
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create heizlbjy binPath= "C:\Windows\SysWOW64\heizlbjy\bivvyjbw.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_df111541b38a5770af185e26817f8ddc.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2276
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description heizlbjy "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2020
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start heizlbjy
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2324
- 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:1460

C:\Windows\SysWOW64\heizlbjy\bivvyjbw.exe
C:\Windows\SysWOW64\heizlbjy\bivvyjbw.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_df111541b38a5770af185e26817f8ddc.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4736
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1096

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\bivvyjbw.exe

Filesize
11.3MB

MD5
fabe64249d97f3089422ae3b238a80a2

SHA1
7c871bd573e40cb24f7426c2955855f48456b24b

SHA256
938ea2b943b064ac045d9567f34e17429a7d99678bd1cb0244b4001dc4223f77

SHA512
eb3eca7c601c4d8c95ee4ca70643f31a4e013d9fa17fe4b631e948d34027845f9b618ae13dbee96ddb79dc097a81aaf941f9c65b274ebf59904af881d260d8ec

Download Submit
memory/1096-9-0x0000000000F10000-0x0000000000F25000-memory.dmp

Filesize
84KB

Download
memory/1096-14-0x0000000000F10000-0x0000000000F25000-memory.dmp

Filesize
84KB

Download
memory/1096-17-0x0000000000F10000-0x0000000000F25000-memory.dmp

Filesize
84KB

Download
memory/1096-18-0x0000000000F10000-0x0000000000F25000-memory.dmp

Filesize
84KB

Download
memory/1096-19-0x0000000000F10000-0x0000000000F25000-memory.dmp

Filesize
84KB

Download
memory/4464-2-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/4464-1-0x0000000002160000-0x0000000002161000-memory.dmp

Filesize
4KB

Download
memory/4464-0-0x0000000002260000-0x0000000002261000-memory.dmp

Filesize
4KB

Download
memory/4464-15-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/4736-8-0x0000000000460000-0x0000000000461000-memory.dmp

Filesize
4KB

Download
memory/4736-7-0x0000000000ED0000-0x0000000000ED1000-memory.dmp

Filesize
4KB

Download
memory/4736-13-0x000000005F000000-0x000000005F011000-memory.dmp

Filesize
68KB

Download
memory/4736-12-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads