tofsee | f5c1953b78e2e0011b315c65651919695c4407b96cc50d2ecf8821e2e0a7fbb6

General

Target

JaffaCakes118_f5c1953b78e2e0011b315c65651919695c4407b96cc50d2ecf8821e2e0a7fbb6.exe
Size

147KB
MD5

5257a7e18e8f9dcbd3171159633288e5
SHA1

172373aaade3546e28f2c653b9d9ae120050faaa
SHA256

f5c1953b78e2e0011b315c65651919695c4407b96cc50d2ecf8821e2e0a7fbb6
SHA512

426e5dfb3d2958910db61bb06859fc3980c5ad6eecdc42a4833ffd7ad5f0d8a3e93536c38c812d9cbc67a5a18515f5cef3fd755795a97f5e65cbcfcee934dc8e
SSDEEP

3072:+b60ay8bkn6jdahHD0V0LI5UnrcPI1ZeNJfX6ALz:+bvayP6jdaZD0VSncPI1eXJ

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
3680	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\bwkbdxno\ImagePath = "C:\\Windows\\SysWOW64\\bwkbdxno\\yoooduas.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	JaffaCakes118_f5c1953b78e2e0011b315c65651919695c4407b96cc50d2ecf8821e2e0a7fbb6.exe

Deletes itself 1 IoCs

pid	Process
744	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2776	yoooduas.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\‹D$‹L$ƒd	yoooduas.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2776 set thread context of 744	2776	yoooduas.exe	98

Launches sc.exe 3 IoCs

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

pid	Process
5052	sc.exe
2980	sc.exe
3504	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	yoooduas.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_f5c1953b78e2e0011b315c65651919695c4407b96cc50d2ecf8821e2e0a7fbb6.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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 872 wrote to memory of 1520	872	JaffaCakes118_f5c1953b78e2e0011b315c65651919695c4407b96cc50d2ecf8821e2e0a7fbb6.exe	85
PID 872 wrote to memory of 1520	872	JaffaCakes118_f5c1953b78e2e0011b315c65651919695c4407b96cc50d2ecf8821e2e0a7fbb6.exe	85
PID 872 wrote to memory of 1520	872	JaffaCakes118_f5c1953b78e2e0011b315c65651919695c4407b96cc50d2ecf8821e2e0a7fbb6.exe	85
PID 872 wrote to memory of 4180	872	JaffaCakes118_f5c1953b78e2e0011b315c65651919695c4407b96cc50d2ecf8821e2e0a7fbb6.exe	87
PID 872 wrote to memory of 4180	872	JaffaCakes118_f5c1953b78e2e0011b315c65651919695c4407b96cc50d2ecf8821e2e0a7fbb6.exe	87
PID 872 wrote to memory of 4180	872	JaffaCakes118_f5c1953b78e2e0011b315c65651919695c4407b96cc50d2ecf8821e2e0a7fbb6.exe	87
PID 872 wrote to memory of 5052	872	JaffaCakes118_f5c1953b78e2e0011b315c65651919695c4407b96cc50d2ecf8821e2e0a7fbb6.exe	89
PID 872 wrote to memory of 5052	872	JaffaCakes118_f5c1953b78e2e0011b315c65651919695c4407b96cc50d2ecf8821e2e0a7fbb6.exe	89
PID 872 wrote to memory of 5052	872	JaffaCakes118_f5c1953b78e2e0011b315c65651919695c4407b96cc50d2ecf8821e2e0a7fbb6.exe	89
PID 872 wrote to memory of 2980	872	JaffaCakes118_f5c1953b78e2e0011b315c65651919695c4407b96cc50d2ecf8821e2e0a7fbb6.exe	91
PID 872 wrote to memory of 2980	872	JaffaCakes118_f5c1953b78e2e0011b315c65651919695c4407b96cc50d2ecf8821e2e0a7fbb6.exe	91
PID 872 wrote to memory of 2980	872	JaffaCakes118_f5c1953b78e2e0011b315c65651919695c4407b96cc50d2ecf8821e2e0a7fbb6.exe	91
PID 872 wrote to memory of 3504	872	JaffaCakes118_f5c1953b78e2e0011b315c65651919695c4407b96cc50d2ecf8821e2e0a7fbb6.exe	93
PID 872 wrote to memory of 3504	872	JaffaCakes118_f5c1953b78e2e0011b315c65651919695c4407b96cc50d2ecf8821e2e0a7fbb6.exe	93
PID 872 wrote to memory of 3504	872	JaffaCakes118_f5c1953b78e2e0011b315c65651919695c4407b96cc50d2ecf8821e2e0a7fbb6.exe	93
PID 872 wrote to memory of 3680	872	JaffaCakes118_f5c1953b78e2e0011b315c65651919695c4407b96cc50d2ecf8821e2e0a7fbb6.exe	96
PID 872 wrote to memory of 3680	872	JaffaCakes118_f5c1953b78e2e0011b315c65651919695c4407b96cc50d2ecf8821e2e0a7fbb6.exe	96
PID 872 wrote to memory of 3680	872	JaffaCakes118_f5c1953b78e2e0011b315c65651919695c4407b96cc50d2ecf8821e2e0a7fbb6.exe	96
PID 2776 wrote to memory of 744	2776	yoooduas.exe	98
PID 2776 wrote to memory of 744	2776	yoooduas.exe	98
PID 2776 wrote to memory of 744	2776	yoooduas.exe	98
PID 2776 wrote to memory of 744	2776	yoooduas.exe	98
PID 2776 wrote to memory of 744	2776	yoooduas.exe	98

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_f5c1953b78e2e0011b315c65651919695c4407b96cc50d2ecf8821e2e0a7fbb6.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_f5c1953b78e2e0011b315c65651919695c4407b96cc50d2ecf8821e2e0a7fbb6.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:872
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bwkbdxno\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1520
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\yoooduas.exe" C:\Windows\SysWOW64\bwkbdxno\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4180
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create bwkbdxno binPath= "C:\Windows\SysWOW64\bwkbdxno\yoooduas.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_f5c1953b78e2e0011b315c65651919695c4407b96cc50d2ecf8821e2e0a7fbb6.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:5052
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description bwkbdxno "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2980
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start bwkbdxno
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3504
- 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:3680

C:\Windows\SysWOW64\bwkbdxno\yoooduas.exe
C:\Windows\SysWOW64\bwkbdxno\yoooduas.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_f5c1953b78e2e0011b315c65651919695c4407b96cc50d2ecf8821e2e0a7fbb6.exe"
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2776
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:744

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\yoooduas.exe

Filesize
13.0MB

MD5
55ee56fee186b91e0d17a75cbba86bd2

SHA1
4bf7e1cf2a30c70b2cbaba42e2724d3c66f98e2e

SHA256
e45cf605e046a02446efddfe08cd8f3b8c7b7a08a6c6202f7a27150ea417c8e4

SHA512
f1e953b6b17c17d42ffbd717b53eef5725fadc3b38dc758534b32942960c9641b4eebfd69d75d255440e157cca823074d53e78fada085a7afcf929a8006bf358

Download Submit
memory/744-11-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/744-18-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/744-17-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/872-14-0x00000000006E0000-0x00000000006F3000-memory.dmp

Filesize
76KB

Download
memory/872-13-0x0000000000710000-0x0000000000810000-memory.dmp

Filesize
1024KB

Download
memory/872-2-0x00000000006E0000-0x00000000006F3000-memory.dmp

Filesize
76KB

Download
memory/872-15-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/872-16-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/872-1-0x0000000000710000-0x0000000000810000-memory.dmp

Filesize
1024KB

Download
memory/872-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2776-10-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2776-9-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2776-8-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2776-20-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads