tofsee | 48e0ce9cfa0bd0951aaf6cff66593631c06472384d593641fe76854c7d0b3f82

General

Target

JaffaCakes118_ffdceebfd66c68c128cd5c7e349881b5.exe
Size

11.2MB
MD5

ffdceebfd66c68c128cd5c7e349881b5
SHA1

19e173e67dea7a78b95bce015cf4a58dc2f976c7
SHA256

48e0ce9cfa0bd0951aaf6cff66593631c06472384d593641fe76854c7d0b3f82
SHA512

be958ffd1343a1e1c06ea68a29fa6861c6a1762a74f227190c7d2597a0a64f9926527491b8a11835975d6bf7743359423c9dbf090523d9585c7d1afb623acbd8
SSDEEP

49152:wNbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb7:w

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
1148	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\lufhqjbi\ImagePath = "C:\\Windows\\SysWOW64\\lufhqjbi\\rpzxxnwm.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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	JaffaCakes118_ffdceebfd66c68c128cd5c7e349881b5.exe

Deletes itself 1 IoCs

pid	Process
3916	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3992	rpzxxnwm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3992 set thread context of 3916	3992	rpzxxnwm.exe	98

Launches sc.exe 3 IoCs

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

pid	Process
4704	sc.exe
112	sc.exe
2488	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 queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
1600	3844	WerFault.exe	81
1680	3992	WerFault.exe	92

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	JaffaCakes118_ffdceebfd66c68c128cd5c7e349881b5.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rpzxxnwm.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

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3844 wrote to memory of 4984	3844	JaffaCakes118_ffdceebfd66c68c128cd5c7e349881b5.exe	82
PID 3844 wrote to memory of 4984	3844	JaffaCakes118_ffdceebfd66c68c128cd5c7e349881b5.exe	82
PID 3844 wrote to memory of 4984	3844	JaffaCakes118_ffdceebfd66c68c128cd5c7e349881b5.exe	82
PID 3844 wrote to memory of 2028	3844	JaffaCakes118_ffdceebfd66c68c128cd5c7e349881b5.exe	84
PID 3844 wrote to memory of 2028	3844	JaffaCakes118_ffdceebfd66c68c128cd5c7e349881b5.exe	84
PID 3844 wrote to memory of 2028	3844	JaffaCakes118_ffdceebfd66c68c128cd5c7e349881b5.exe	84
PID 3844 wrote to memory of 4704	3844	JaffaCakes118_ffdceebfd66c68c128cd5c7e349881b5.exe	86
PID 3844 wrote to memory of 4704	3844	JaffaCakes118_ffdceebfd66c68c128cd5c7e349881b5.exe	86
PID 3844 wrote to memory of 4704	3844	JaffaCakes118_ffdceebfd66c68c128cd5c7e349881b5.exe	86
PID 3844 wrote to memory of 112	3844	JaffaCakes118_ffdceebfd66c68c128cd5c7e349881b5.exe	88
PID 3844 wrote to memory of 112	3844	JaffaCakes118_ffdceebfd66c68c128cd5c7e349881b5.exe	88
PID 3844 wrote to memory of 112	3844	JaffaCakes118_ffdceebfd66c68c128cd5c7e349881b5.exe	88
PID 3844 wrote to memory of 2488	3844	JaffaCakes118_ffdceebfd66c68c128cd5c7e349881b5.exe	90
PID 3844 wrote to memory of 2488	3844	JaffaCakes118_ffdceebfd66c68c128cd5c7e349881b5.exe	90
PID 3844 wrote to memory of 2488	3844	JaffaCakes118_ffdceebfd66c68c128cd5c7e349881b5.exe	90
PID 3844 wrote to memory of 1148	3844	JaffaCakes118_ffdceebfd66c68c128cd5c7e349881b5.exe	93
PID 3844 wrote to memory of 1148	3844	JaffaCakes118_ffdceebfd66c68c128cd5c7e349881b5.exe	93
PID 3844 wrote to memory of 1148	3844	JaffaCakes118_ffdceebfd66c68c128cd5c7e349881b5.exe	93
PID 3992 wrote to memory of 3916	3992	rpzxxnwm.exe	98
PID 3992 wrote to memory of 3916	3992	rpzxxnwm.exe	98
PID 3992 wrote to memory of 3916	3992	rpzxxnwm.exe	98
PID 3992 wrote to memory of 3916	3992	rpzxxnwm.exe	98
PID 3992 wrote to memory of 3916	3992	rpzxxnwm.exe	98

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_ffdceebfd66c68c128cd5c7e349881b5.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_ffdceebfd66c68c128cd5c7e349881b5.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3844
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lufhqjbi\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4984
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rpzxxnwm.exe" C:\Windows\SysWOW64\lufhqjbi\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2028
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create lufhqjbi binPath= "C:\Windows\SysWOW64\lufhqjbi\rpzxxnwm.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_ffdceebfd66c68c128cd5c7e349881b5.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4704
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description lufhqjbi "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:112
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start lufhqjbi
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2488
- 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:1148
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3844 -s 1248
  2⤵
  - Program crash
  PID:1600

C:\Windows\SysWOW64\lufhqjbi\rpzxxnwm.exe
C:\Windows\SysWOW64\lufhqjbi\rpzxxnwm.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_ffdceebfd66c68c128cd5c7e349881b5.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3992
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3916
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3992 -s 528
  2⤵
  - Program crash
  PID:1680

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3844 -ip 3844
1⤵
PID:4264

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 3992 -ip 3992
1⤵
PID:212

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\rpzxxnwm.exe

Filesize
11.9MB

MD5
80cf6370728f73e974dfb01c3f63194b

SHA1
0edb745317be008d7e763e321d84b9166445ae31

SHA256
f1b15965f82286066f06cd5171a6dd12c325d0d88877b55f6064c5d70d69fac3

SHA512
158f46d2f0a8daef3b0b236f598f8a5338e555bfd56fcd9097ee7bb0c3e0412d2d79496f82f7e3e174a0507cdf67c7fa77980fd95b72f8be99ec8095555e47b9

Download Submit
memory/3844-1-0x0000000002BD0000-0x0000000002CD0000-memory.dmp

Filesize
1024KB

Download
memory/3844-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/3844-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3844-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3844-9-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/3844-8-0x0000000000400000-0x0000000002B90000-memory.dmp

Filesize
39.6MB

Download
memory/3916-11-0x0000000000590000-0x00000000005A5000-memory.dmp

Filesize
84KB

Download
memory/3916-13-0x0000000000590000-0x00000000005A5000-memory.dmp

Filesize
84KB

Download
memory/3916-15-0x0000000000590000-0x00000000005A5000-memory.dmp

Filesize
84KB

Download
memory/3992-14-0x0000000000400000-0x0000000002B90000-memory.dmp

Filesize
39.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads