tofsee | 437ebedbd294676d87317e8c2f19eca989a12cfb7e2ea03824d2e01ab32512e8

General

Target

f7ca2b5fa8a56cdbbaf4746b4ceb1ba7_JaffaCakes118.exe
Size

12.5MB
MD5

f7ca2b5fa8a56cdbbaf4746b4ceb1ba7
SHA1

03296181495dcfaf87ccd3688e5b459955767813
SHA256

437ebedbd294676d87317e8c2f19eca989a12cfb7e2ea03824d2e01ab32512e8
SHA512

c3a9bcfc5d0c85b65b96b6c1cc6f90ada63c00d37d2a11a5b14e9b7201df13f40d0997737722e6cff2462f624f810551da895005e6534b3f3961845ef0cb7925
SSDEEP

49152:G2mNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNn:X

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
3456	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\yyjtqumx\ImagePath = "C:\\Windows\\SysWOW64\\yyjtqumx\\nzuryxxl.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	f7ca2b5fa8a56cdbbaf4746b4ceb1ba7_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
1336	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1772	nzuryxxl.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1772 set thread context of 1336	1772	nzuryxxl.exe	98

Launches sc.exe 3 IoCs

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

pid	Process
2396	sc.exe
1660	sc.exe
3768	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
3000	4420	WerFault.exe	81
4928	1772	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	nzuryxxl.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f7ca2b5fa8a56cdbbaf4746b4ceb1ba7_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4420 wrote to memory of 220	4420	f7ca2b5fa8a56cdbbaf4746b4ceb1ba7_JaffaCakes118.exe	82
PID 4420 wrote to memory of 220	4420	f7ca2b5fa8a56cdbbaf4746b4ceb1ba7_JaffaCakes118.exe	82
PID 4420 wrote to memory of 220	4420	f7ca2b5fa8a56cdbbaf4746b4ceb1ba7_JaffaCakes118.exe	82
PID 4420 wrote to memory of 5020	4420	f7ca2b5fa8a56cdbbaf4746b4ceb1ba7_JaffaCakes118.exe	84
PID 4420 wrote to memory of 5020	4420	f7ca2b5fa8a56cdbbaf4746b4ceb1ba7_JaffaCakes118.exe	84
PID 4420 wrote to memory of 5020	4420	f7ca2b5fa8a56cdbbaf4746b4ceb1ba7_JaffaCakes118.exe	84
PID 4420 wrote to memory of 3768	4420	f7ca2b5fa8a56cdbbaf4746b4ceb1ba7_JaffaCakes118.exe	86
PID 4420 wrote to memory of 3768	4420	f7ca2b5fa8a56cdbbaf4746b4ceb1ba7_JaffaCakes118.exe	86
PID 4420 wrote to memory of 3768	4420	f7ca2b5fa8a56cdbbaf4746b4ceb1ba7_JaffaCakes118.exe	86
PID 4420 wrote to memory of 2396	4420	f7ca2b5fa8a56cdbbaf4746b4ceb1ba7_JaffaCakes118.exe	88
PID 4420 wrote to memory of 2396	4420	f7ca2b5fa8a56cdbbaf4746b4ceb1ba7_JaffaCakes118.exe	88
PID 4420 wrote to memory of 2396	4420	f7ca2b5fa8a56cdbbaf4746b4ceb1ba7_JaffaCakes118.exe	88
PID 4420 wrote to memory of 1660	4420	f7ca2b5fa8a56cdbbaf4746b4ceb1ba7_JaffaCakes118.exe	90
PID 4420 wrote to memory of 1660	4420	f7ca2b5fa8a56cdbbaf4746b4ceb1ba7_JaffaCakes118.exe	90
PID 4420 wrote to memory of 1660	4420	f7ca2b5fa8a56cdbbaf4746b4ceb1ba7_JaffaCakes118.exe	90
PID 4420 wrote to memory of 3456	4420	f7ca2b5fa8a56cdbbaf4746b4ceb1ba7_JaffaCakes118.exe	93
PID 4420 wrote to memory of 3456	4420	f7ca2b5fa8a56cdbbaf4746b4ceb1ba7_JaffaCakes118.exe	93
PID 4420 wrote to memory of 3456	4420	f7ca2b5fa8a56cdbbaf4746b4ceb1ba7_JaffaCakes118.exe	93
PID 1772 wrote to memory of 1336	1772	nzuryxxl.exe	98
PID 1772 wrote to memory of 1336	1772	nzuryxxl.exe	98
PID 1772 wrote to memory of 1336	1772	nzuryxxl.exe	98
PID 1772 wrote to memory of 1336	1772	nzuryxxl.exe	98
PID 1772 wrote to memory of 1336	1772	nzuryxxl.exe	98

C:\Users\Admin\AppData\Local\Temp\f7ca2b5fa8a56cdbbaf4746b4ceb1ba7_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f7ca2b5fa8a56cdbbaf4746b4ceb1ba7_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4420
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\yyjtqumx\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:220
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nzuryxxl.exe" C:\Windows\SysWOW64\yyjtqumx\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:5020
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create yyjtqumx binPath= "C:\Windows\SysWOW64\yyjtqumx\nzuryxxl.exe /d\"C:\Users\Admin\AppData\Local\Temp\f7ca2b5fa8a56cdbbaf4746b4ceb1ba7_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3768
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description yyjtqumx "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2396
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start yyjtqumx
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1660
- 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:3456
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4420 -s 896
  2⤵
  - Program crash
  PID:3000

C:\Windows\SysWOW64\yyjtqumx\nzuryxxl.exe
C:\Windows\SysWOW64\yyjtqumx\nzuryxxl.exe /d"C:\Users\Admin\AppData\Local\Temp\f7ca2b5fa8a56cdbbaf4746b4ceb1ba7_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1772
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1336
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1772 -s 516
  2⤵
  - Program crash
  PID:4928

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 4420 -ip 4420
1⤵
PID:4076

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 552 -p 1772 -ip 1772
1⤵
PID:2004

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

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Downloads

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

Filesize
13.4MB

MD5
209bfc430c8bc09595adbb006d949052

SHA1
1fd53ecef551dc7b4adb329a68903add57532b3c

SHA256
717328f986de9d4968823d9db40823197d5602ab607ec5d1d4b300078ce7fc2b

SHA512
4109fc533094cf3cacaa3fcc5a41fb7d0261cfe11a3563c2d5ce69d57b8dadfee7afe6aac1e718e532f7a32907a20f96fc56405a49d5311c7004a7e6df9ad460

Download Submit
memory/1336-14-0x0000000000A50000-0x0000000000A65000-memory.dmp

Filesize
84KB

Download
memory/1336-11-0x0000000000A50000-0x0000000000A65000-memory.dmp

Filesize
84KB

Download
memory/1336-16-0x0000000000A50000-0x0000000000A65000-memory.dmp

Filesize
84KB

Download
memory/1772-12-0x0000000000400000-0x000000000086B000-memory.dmp

Filesize
4.4MB

Download
memory/1772-15-0x0000000000400000-0x000000000086B000-memory.dmp

Filesize
4.4MB

Download
memory/4420-1-0x0000000000B80000-0x0000000000C80000-memory.dmp

Filesize
1024KB

Download
memory/4420-2-0x0000000000AC0000-0x0000000000AD3000-memory.dmp

Filesize
76KB

Download
memory/4420-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4420-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4420-9-0x0000000000AC0000-0x0000000000AD3000-memory.dmp

Filesize
76KB

Download
memory/4420-8-0x0000000000400000-0x000000000086B000-memory.dmp

Filesize
4.4MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads