tofsee | bc08635f68d183add0e1c746f47d07815a903aac07c3334131cfc808f85b8bd9

General

Target

JaffaCakes118_26dc30509b939d95f3e7ff81bd9c02cd.exe
Size

13.1MB
MD5

26dc30509b939d95f3e7ff81bd9c02cd
SHA1

95503eafd7e3bbe829ba4f9cff6863c620e1ac27
SHA256

bc08635f68d183add0e1c746f47d07815a903aac07c3334131cfc808f85b8bd9
SHA512

24a7543199b06358b296e4c0bedb3365c3e29ac054aa3ba7c0a22e49079fa6d672e2dfc25ca8024a06526f16a4515bbc1e8798d715a3416ab4809f9f8a487fb4
SSDEEP

3072:rBM7AAAPsPmgSn/HzaHWgwwQjHF0kKUyodrMpNLbdr05b7pNeoAhTGl9NZ9k222H:C7h1HSn/WHnQjphwNXdr0gU9z

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
2816	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\ywhcocgu\ImagePath = "C:\\Windows\\SysWOW64\\ywhcocgu\\icyepzrx.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-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	JaffaCakes118_26dc30509b939d95f3e7ff81bd9c02cd.exe

Deletes itself 1 IoCs

pid	Process
3020	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2620	icyepzrx.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2620 set thread context of 3020	2620	icyepzrx.exe	101

Launches sc.exe 3 IoCs

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

pid	Process
4704	sc.exe
2764	sc.exe
1624	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
1740	2444	WerFault.exe	82
4032	2620	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	sc.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	icyepzrx.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_26dc30509b939d95f3e7ff81bd9c02cd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2444 wrote to memory of 1548	2444	JaffaCakes118_26dc30509b939d95f3e7ff81bd9c02cd.exe	83
PID 2444 wrote to memory of 1548	2444	JaffaCakes118_26dc30509b939d95f3e7ff81bd9c02cd.exe	83
PID 2444 wrote to memory of 1548	2444	JaffaCakes118_26dc30509b939d95f3e7ff81bd9c02cd.exe	83
PID 2444 wrote to memory of 2808	2444	JaffaCakes118_26dc30509b939d95f3e7ff81bd9c02cd.exe	85
PID 2444 wrote to memory of 2808	2444	JaffaCakes118_26dc30509b939d95f3e7ff81bd9c02cd.exe	85
PID 2444 wrote to memory of 2808	2444	JaffaCakes118_26dc30509b939d95f3e7ff81bd9c02cd.exe	85
PID 2444 wrote to memory of 4704	2444	JaffaCakes118_26dc30509b939d95f3e7ff81bd9c02cd.exe	87
PID 2444 wrote to memory of 4704	2444	JaffaCakes118_26dc30509b939d95f3e7ff81bd9c02cd.exe	87
PID 2444 wrote to memory of 4704	2444	JaffaCakes118_26dc30509b939d95f3e7ff81bd9c02cd.exe	87
PID 2444 wrote to memory of 2764	2444	JaffaCakes118_26dc30509b939d95f3e7ff81bd9c02cd.exe	89
PID 2444 wrote to memory of 2764	2444	JaffaCakes118_26dc30509b939d95f3e7ff81bd9c02cd.exe	89
PID 2444 wrote to memory of 2764	2444	JaffaCakes118_26dc30509b939d95f3e7ff81bd9c02cd.exe	89
PID 2444 wrote to memory of 1624	2444	JaffaCakes118_26dc30509b939d95f3e7ff81bd9c02cd.exe	92
PID 2444 wrote to memory of 1624	2444	JaffaCakes118_26dc30509b939d95f3e7ff81bd9c02cd.exe	92
PID 2444 wrote to memory of 1624	2444	JaffaCakes118_26dc30509b939d95f3e7ff81bd9c02cd.exe	92
PID 2444 wrote to memory of 2816	2444	JaffaCakes118_26dc30509b939d95f3e7ff81bd9c02cd.exe	95
PID 2444 wrote to memory of 2816	2444	JaffaCakes118_26dc30509b939d95f3e7ff81bd9c02cd.exe	95
PID 2444 wrote to memory of 2816	2444	JaffaCakes118_26dc30509b939d95f3e7ff81bd9c02cd.exe	95
PID 2620 wrote to memory of 3020	2620	icyepzrx.exe	101
PID 2620 wrote to memory of 3020	2620	icyepzrx.exe	101
PID 2620 wrote to memory of 3020	2620	icyepzrx.exe	101
PID 2620 wrote to memory of 3020	2620	icyepzrx.exe	101
PID 2620 wrote to memory of 3020	2620	icyepzrx.exe	101

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_26dc30509b939d95f3e7ff81bd9c02cd.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_26dc30509b939d95f3e7ff81bd9c02cd.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2444
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ywhcocgu\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1548
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\icyepzrx.exe" C:\Windows\SysWOW64\ywhcocgu\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2808
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ywhcocgu binPath= "C:\Windows\SysWOW64\ywhcocgu\icyepzrx.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_26dc30509b939d95f3e7ff81bd9c02cd.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 ywhcocgu "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2764
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ywhcocgu
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1624
- 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:2816
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2444 -s 1276
  2⤵
  - Program crash
  PID:1740

C:\Windows\SysWOW64\ywhcocgu\icyepzrx.exe
C:\Windows\SysWOW64\ywhcocgu\icyepzrx.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_26dc30509b939d95f3e7ff81bd9c02cd.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2620
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3020
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2620 -s 536
  2⤵
  - Program crash
  PID:4032

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 2444 -ip 2444
1⤵
PID:3548

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 2620 -ip 2620
1⤵
PID:3080

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\icyepzrx.exe

Filesize
13.5MB

MD5
2becc43f366e5024489706b3b85bab9b

SHA1
cbe2e6b8a7c8a19c69176ac86c1c21a17ddf5783

SHA256
87bec689dee7a7e33758b940cdefab4909b9a180384363b5c5567c4b6619e3c0

SHA512
4cf94ae546b8cb16404ef41b29b425c45a83d5ded3e94bf297ba185895dff301c6836b0deb4e025fc937a01d50c5d6068be0c56c44648a43f2384fd1d1ed0716

Download Submit
memory/2444-8-0x0000000000400000-0x000000000086C000-memory.dmp

Filesize
4.4MB

Download
memory/2444-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2444-1-0x0000000000990000-0x0000000000A90000-memory.dmp

Filesize
1024KB

Download
memory/2444-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2444-9-0x00000000008F0000-0x0000000000903000-memory.dmp

Filesize
76KB

Download
memory/2444-2-0x00000000008F0000-0x0000000000903000-memory.dmp

Filesize
76KB

Download
memory/2620-11-0x0000000000400000-0x000000000086C000-memory.dmp

Filesize
4.4MB

Download
memory/2620-12-0x0000000000400000-0x000000000086C000-memory.dmp

Filesize
4.4MB

Download
memory/2620-14-0x0000000000400000-0x000000000086C000-memory.dmp

Filesize
4.4MB

Download
memory/2620-19-0x0000000000400000-0x000000000086C000-memory.dmp

Filesize
4.4MB

Download
memory/3020-13-0x00000000001B0000-0x00000000001C5000-memory.dmp

Filesize
84KB

Download
memory/3020-16-0x00000000001B0000-0x00000000001C5000-memory.dmp

Filesize
84KB

Download
memory/3020-17-0x00000000001B0000-0x00000000001C5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads