tofsee | a9a291b7f9911e58c9f650f2bd37589abcb3bef5c2ff650702cca54f5bee7434

General

Target

JaffaCakes118_5b720f313daee0403bb2584910f0eea6.exe
Size

11.4MB
MD5

5b720f313daee0403bb2584910f0eea6
SHA1

16c1148e04eb92bcc6e4469c883979f52fa95241
SHA256

a9a291b7f9911e58c9f650f2bd37589abcb3bef5c2ff650702cca54f5bee7434
SHA512

da27f80d5d66bd8fc99ea0edc097875a074a6f4499319ac05f0cd03de1c85d859b5411cd8fcf40c191221008c6eb70efc7c51ab506047d176d09629044e7f794
SSDEEP

98304:e+ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZH:e

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
3496	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\lwaiews\ImagePath = "C:\\Windows\\SysWOW64\\lwaiews\\ejfxvyk.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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	JaffaCakes118_5b720f313daee0403bb2584910f0eea6.exe

Deletes itself 1 IoCs

pid	Process
632	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3236	ejfxvyk.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3236 set thread context of 632	3236	ejfxvyk.exe	103

Launches sc.exe 3 IoCs

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

pid	Process
1952	sc.exe
2260	sc.exe
2344	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
2836	920	WerFault.exe	82
372	3236	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	ejfxvyk.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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_5b720f313daee0403bb2584910f0eea6.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	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 920 wrote to memory of 4432	920	JaffaCakes118_5b720f313daee0403bb2584910f0eea6.exe	83
PID 920 wrote to memory of 4432	920	JaffaCakes118_5b720f313daee0403bb2584910f0eea6.exe	83
PID 920 wrote to memory of 4432	920	JaffaCakes118_5b720f313daee0403bb2584910f0eea6.exe	83
PID 920 wrote to memory of 2596	920	JaffaCakes118_5b720f313daee0403bb2584910f0eea6.exe	85
PID 920 wrote to memory of 2596	920	JaffaCakes118_5b720f313daee0403bb2584910f0eea6.exe	85
PID 920 wrote to memory of 2596	920	JaffaCakes118_5b720f313daee0403bb2584910f0eea6.exe	85
PID 920 wrote to memory of 1952	920	JaffaCakes118_5b720f313daee0403bb2584910f0eea6.exe	88
PID 920 wrote to memory of 1952	920	JaffaCakes118_5b720f313daee0403bb2584910f0eea6.exe	88
PID 920 wrote to memory of 1952	920	JaffaCakes118_5b720f313daee0403bb2584910f0eea6.exe	88
PID 920 wrote to memory of 2260	920	JaffaCakes118_5b720f313daee0403bb2584910f0eea6.exe	90
PID 920 wrote to memory of 2260	920	JaffaCakes118_5b720f313daee0403bb2584910f0eea6.exe	90
PID 920 wrote to memory of 2260	920	JaffaCakes118_5b720f313daee0403bb2584910f0eea6.exe	90
PID 920 wrote to memory of 2344	920	JaffaCakes118_5b720f313daee0403bb2584910f0eea6.exe	92
PID 920 wrote to memory of 2344	920	JaffaCakes118_5b720f313daee0403bb2584910f0eea6.exe	92
PID 920 wrote to memory of 2344	920	JaffaCakes118_5b720f313daee0403bb2584910f0eea6.exe	92
PID 920 wrote to memory of 3496	920	JaffaCakes118_5b720f313daee0403bb2584910f0eea6.exe	95
PID 920 wrote to memory of 3496	920	JaffaCakes118_5b720f313daee0403bb2584910f0eea6.exe	95
PID 920 wrote to memory of 3496	920	JaffaCakes118_5b720f313daee0403bb2584910f0eea6.exe	95
PID 3236 wrote to memory of 632	3236	ejfxvyk.exe	103
PID 3236 wrote to memory of 632	3236	ejfxvyk.exe	103
PID 3236 wrote to memory of 632	3236	ejfxvyk.exe	103
PID 3236 wrote to memory of 632	3236	ejfxvyk.exe	103
PID 3236 wrote to memory of 632	3236	ejfxvyk.exe	103

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_5b720f313daee0403bb2584910f0eea6.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_5b720f313daee0403bb2584910f0eea6.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:920
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lwaiews\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4432
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ejfxvyk.exe" C:\Windows\SysWOW64\lwaiews\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2596
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create lwaiews binPath= "C:\Windows\SysWOW64\lwaiews\ejfxvyk.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_5b720f313daee0403bb2584910f0eea6.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1952
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description lwaiews "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2260
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start lwaiews
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2344
- 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:3496
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 920 -s 652
  2⤵
  - Program crash
  PID:2836

C:\Windows\SysWOW64\lwaiews\ejfxvyk.exe
C:\Windows\SysWOW64\lwaiews\ejfxvyk.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_5b720f313daee0403bb2584910f0eea6.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3236
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:632
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3236 -s 532
  2⤵
  - Program crash
  PID:372

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 920 -ip 920
1⤵
PID:3968

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 3236 -ip 3236
1⤵
PID:232

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\ejfxvyk.exe

Filesize
11.2MB

MD5
c3f23b89faaf91124adac79fe4efb1ad

SHA1
20e7a238d98376da22037a6451a02025ffedba88

SHA256
ebe042276bdc0bb501d3c7e94b9b8861c4e7d3f5f9373347ae362933f058e744

SHA512
19d243709caa54ac37741ee60c610772c0b5856ca082dc79a51ea0534e04f6452af3b5f4448b55a29340e189c5db741368689cc642678b96d3d63792560b8631

Download Submit
memory/632-14-0x0000000000800000-0x0000000000815000-memory.dmp

Filesize
84KB

Download
memory/632-17-0x0000000000800000-0x0000000000815000-memory.dmp

Filesize
84KB

Download
memory/632-16-0x0000000000800000-0x0000000000815000-memory.dmp

Filesize
84KB

Download
memory/920-9-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/920-8-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/920-1-0x0000000000450000-0x0000000000550000-memory.dmp

Filesize
1024KB

Download
memory/920-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/920-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/920-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/3236-11-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/3236-12-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/3236-13-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/3236-18-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads