tofsee | c6192c9da5f9ad389e4c6f4e2554d486b5758afd9d3849e0df314ffa6e590a23

General

Target

ac0d3e42e558dea172d2398c8b8020be_JaffaCakes118.exe
Size

10.5MB
MD5

ac0d3e42e558dea172d2398c8b8020be
SHA1

76e32725ab8453fb50e73abdb0f668a56f25c39b
SHA256

c6192c9da5f9ad389e4c6f4e2554d486b5758afd9d3849e0df314ffa6e590a23
SHA512

98efa954ed430e10e408dc974b8f9113592a81f8d7104b0360e9d16d946452b3847ddba064cbcb7e9236691ab2c13d42382e0083707211366b4fb5a532de767a
SSDEEP

24576:lMUcbq/93LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLr:TP9

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
2988	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\guwvqrkx\ImagePath = "C:\\Windows\\SysWOW64\\guwvqrkx\\trbzzpyo.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-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	ac0d3e42e558dea172d2398c8b8020be_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
4736	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4116	trbzzpyo.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4116 set thread context of 4736	4116	trbzzpyo.exe	102

Launches sc.exe 3 IoCs

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

pid	Process
3004	sc.exe
2984	sc.exe
4592	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
2948	4268	WerFault.exe	81
1000	4116	WerFault.exe	94

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	trbzzpyo.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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ac0d3e42e558dea172d2398c8b8020be_JaffaCakes118.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 4268 wrote to memory of 4200	4268	ac0d3e42e558dea172d2398c8b8020be_JaffaCakes118.exe	82
PID 4268 wrote to memory of 4200	4268	ac0d3e42e558dea172d2398c8b8020be_JaffaCakes118.exe	82
PID 4268 wrote to memory of 4200	4268	ac0d3e42e558dea172d2398c8b8020be_JaffaCakes118.exe	82
PID 4268 wrote to memory of 5112	4268	ac0d3e42e558dea172d2398c8b8020be_JaffaCakes118.exe	84
PID 4268 wrote to memory of 5112	4268	ac0d3e42e558dea172d2398c8b8020be_JaffaCakes118.exe	84
PID 4268 wrote to memory of 5112	4268	ac0d3e42e558dea172d2398c8b8020be_JaffaCakes118.exe	84
PID 4268 wrote to memory of 2984	4268	ac0d3e42e558dea172d2398c8b8020be_JaffaCakes118.exe	86
PID 4268 wrote to memory of 2984	4268	ac0d3e42e558dea172d2398c8b8020be_JaffaCakes118.exe	86
PID 4268 wrote to memory of 2984	4268	ac0d3e42e558dea172d2398c8b8020be_JaffaCakes118.exe	86
PID 4268 wrote to memory of 4592	4268	ac0d3e42e558dea172d2398c8b8020be_JaffaCakes118.exe	88
PID 4268 wrote to memory of 4592	4268	ac0d3e42e558dea172d2398c8b8020be_JaffaCakes118.exe	88
PID 4268 wrote to memory of 4592	4268	ac0d3e42e558dea172d2398c8b8020be_JaffaCakes118.exe	88
PID 4268 wrote to memory of 3004	4268	ac0d3e42e558dea172d2398c8b8020be_JaffaCakes118.exe	92
PID 4268 wrote to memory of 3004	4268	ac0d3e42e558dea172d2398c8b8020be_JaffaCakes118.exe	92
PID 4268 wrote to memory of 3004	4268	ac0d3e42e558dea172d2398c8b8020be_JaffaCakes118.exe	92
PID 4268 wrote to memory of 2988	4268	ac0d3e42e558dea172d2398c8b8020be_JaffaCakes118.exe	95
PID 4268 wrote to memory of 2988	4268	ac0d3e42e558dea172d2398c8b8020be_JaffaCakes118.exe	95
PID 4268 wrote to memory of 2988	4268	ac0d3e42e558dea172d2398c8b8020be_JaffaCakes118.exe	95
PID 4116 wrote to memory of 4736	4116	trbzzpyo.exe	102
PID 4116 wrote to memory of 4736	4116	trbzzpyo.exe	102
PID 4116 wrote to memory of 4736	4116	trbzzpyo.exe	102
PID 4116 wrote to memory of 4736	4116	trbzzpyo.exe	102
PID 4116 wrote to memory of 4736	4116	trbzzpyo.exe	102

C:\Users\Admin\AppData\Local\Temp\ac0d3e42e558dea172d2398c8b8020be_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\ac0d3e42e558dea172d2398c8b8020be_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4268
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\guwvqrkx\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4200
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\trbzzpyo.exe" C:\Windows\SysWOW64\guwvqrkx\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:5112
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create guwvqrkx binPath= "C:\Windows\SysWOW64\guwvqrkx\trbzzpyo.exe /d\"C:\Users\Admin\AppData\Local\Temp\ac0d3e42e558dea172d2398c8b8020be_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2984
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description guwvqrkx "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4592
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start guwvqrkx
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3004
- 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:2988
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4268 -s 1040
  2⤵
  - Program crash
  PID:2948

C:\Windows\SysWOW64\guwvqrkx\trbzzpyo.exe
C:\Windows\SysWOW64\guwvqrkx\trbzzpyo.exe /d"C:\Users\Admin\AppData\Local\Temp\ac0d3e42e558dea172d2398c8b8020be_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4116
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4736
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4116 -s 520
  2⤵
  - Program crash
  PID:1000

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 4268 -ip 4268
1⤵
PID:5092

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 504 -p 4116 -ip 4116
1⤵
PID:4724

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\trbzzpyo.exe

Filesize
11.9MB

MD5
95074ed89036600e6433e329ee7128cb

SHA1
80915ad68066453c7aded3ce0c7f9da4f3f743ab

SHA256
fdeaf7b969c31066e281b18fb0d36554c11dd734ff0a8f289772cec242cac2b6

SHA512
d10b62a302ccfa86d656ebc2ddf9ccd87c8f5eb87a087f3231e148edd593dc898da3e32182b02bd763196f0bc6bbb11e5fd53972ecec4035a05ce96bb645f8f8

Download Submit
memory/4116-15-0x0000000000400000-0x0000000002B8F000-memory.dmp

Filesize
39.6MB

Download
memory/4268-2-0x0000000002C00000-0x0000000002C13000-memory.dmp

Filesize
76KB

Download
memory/4268-1-0x0000000002DC0000-0x0000000002EC0000-memory.dmp

Filesize
1024KB

Download
memory/4268-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4268-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4268-9-0x0000000002C00000-0x0000000002C13000-memory.dmp

Filesize
76KB

Download
memory/4268-8-0x0000000000400000-0x0000000002B8F000-memory.dmp

Filesize
39.6MB

Download
memory/4736-11-0x0000000000560000-0x0000000000575000-memory.dmp

Filesize
84KB

Download
memory/4736-13-0x0000000000560000-0x0000000000575000-memory.dmp

Filesize
84KB

Download
memory/4736-14-0x0000000000560000-0x0000000000575000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads