tofsee | 73563ffcb2b871ef56e766df408c564b04fd1e43919929a0c15d028780ee2e73

General

Target

JaffaCakes118_b6e0e560d78c516c9fdc7aac115c7a1a.exe
Size

11.6MB
MD5

b6e0e560d78c516c9fdc7aac115c7a1a
SHA1

009b9444c5456d7ef473320427045d2e6fa65745
SHA256

73563ffcb2b871ef56e766df408c564b04fd1e43919929a0c15d028780ee2e73
SHA512

12ddbf413fe7f320102f1064aac72ff73f32f16987f8eb1c3a4b12f2c5f984f18f64666a28e8f86506c795b804239c3d89df15dd294a235a250e232ca7c7c324
SSDEEP

49152:I2mNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN9:l

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
1808	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\ofklnom\ImagePath = "C:\\Windows\\SysWOW64\\ofklnom\\rusnhoyi.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-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	JaffaCakes118_b6e0e560d78c516c9fdc7aac115c7a1a.exe

Deletes itself 1 IoCs

pid	Process
1376	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4972	rusnhoyi.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4972 set thread context of 1376	4972	rusnhoyi.exe	100

Launches sc.exe 3 IoCs

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

pid	Process
2740	sc.exe
740	sc.exe
1528	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
5048	224	WerFault.exe	82
4952	4972	WerFault.exe	93

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	rusnhoyi.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_b6e0e560d78c516c9fdc7aac115c7a1a.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
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 224 wrote to memory of 4908	224	JaffaCakes118_b6e0e560d78c516c9fdc7aac115c7a1a.exe	83
PID 224 wrote to memory of 4908	224	JaffaCakes118_b6e0e560d78c516c9fdc7aac115c7a1a.exe	83
PID 224 wrote to memory of 4908	224	JaffaCakes118_b6e0e560d78c516c9fdc7aac115c7a1a.exe	83
PID 224 wrote to memory of 3376	224	JaffaCakes118_b6e0e560d78c516c9fdc7aac115c7a1a.exe	85
PID 224 wrote to memory of 3376	224	JaffaCakes118_b6e0e560d78c516c9fdc7aac115c7a1a.exe	85
PID 224 wrote to memory of 3376	224	JaffaCakes118_b6e0e560d78c516c9fdc7aac115c7a1a.exe	85
PID 224 wrote to memory of 2740	224	JaffaCakes118_b6e0e560d78c516c9fdc7aac115c7a1a.exe	87
PID 224 wrote to memory of 2740	224	JaffaCakes118_b6e0e560d78c516c9fdc7aac115c7a1a.exe	87
PID 224 wrote to memory of 2740	224	JaffaCakes118_b6e0e560d78c516c9fdc7aac115c7a1a.exe	87
PID 224 wrote to memory of 740	224	JaffaCakes118_b6e0e560d78c516c9fdc7aac115c7a1a.exe	89
PID 224 wrote to memory of 740	224	JaffaCakes118_b6e0e560d78c516c9fdc7aac115c7a1a.exe	89
PID 224 wrote to memory of 740	224	JaffaCakes118_b6e0e560d78c516c9fdc7aac115c7a1a.exe	89
PID 224 wrote to memory of 1528	224	JaffaCakes118_b6e0e560d78c516c9fdc7aac115c7a1a.exe	91
PID 224 wrote to memory of 1528	224	JaffaCakes118_b6e0e560d78c516c9fdc7aac115c7a1a.exe	91
PID 224 wrote to memory of 1528	224	JaffaCakes118_b6e0e560d78c516c9fdc7aac115c7a1a.exe	91
PID 224 wrote to memory of 1808	224	JaffaCakes118_b6e0e560d78c516c9fdc7aac115c7a1a.exe	94
PID 224 wrote to memory of 1808	224	JaffaCakes118_b6e0e560d78c516c9fdc7aac115c7a1a.exe	94
PID 224 wrote to memory of 1808	224	JaffaCakes118_b6e0e560d78c516c9fdc7aac115c7a1a.exe	94
PID 4972 wrote to memory of 1376	4972	rusnhoyi.exe	100
PID 4972 wrote to memory of 1376	4972	rusnhoyi.exe	100
PID 4972 wrote to memory of 1376	4972	rusnhoyi.exe	100
PID 4972 wrote to memory of 1376	4972	rusnhoyi.exe	100
PID 4972 wrote to memory of 1376	4972	rusnhoyi.exe	100

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_b6e0e560d78c516c9fdc7aac115c7a1a.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_b6e0e560d78c516c9fdc7aac115c7a1a.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:224
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ofklnom\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4908
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rusnhoyi.exe" C:\Windows\SysWOW64\ofklnom\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3376
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ofklnom binPath= "C:\Windows\SysWOW64\ofklnom\rusnhoyi.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_b6e0e560d78c516c9fdc7aac115c7a1a.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2740
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ofklnom "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:740
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ofklnom
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1528
- 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:1808
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 224 -s 1044
  2⤵
  - Program crash
  PID:5048

C:\Windows\SysWOW64\ofklnom\rusnhoyi.exe
C:\Windows\SysWOW64\ofklnom\rusnhoyi.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_b6e0e560d78c516c9fdc7aac115c7a1a.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4972
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1376
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4972 -s 516
  2⤵
  - Program crash
  PID:4952

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 224 -ip 224
1⤵
PID:2008

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 484 -p 4972 -ip 4972
1⤵
PID:4168

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\rusnhoyi.exe

Filesize
13.5MB

MD5
cc976c5f6ddc3a80556f6e96a904f04b

SHA1
c3f286b766402ba7412c200fa9ea25ff4831470f

SHA256
a17e305f8cb0ed347d2807a5199bfaa7961c263fe0887fd36bd2abf72f1f0e98

SHA512
73fd58ecf3bac9ffae76c1d3619ae8239780668d70848f72b0fbab42385ef9b1386849ba363590b1935f2f7e0da19bf496c787098befe64c9a9c3f7d6dae2077

Download Submit
memory/224-1-0x0000000000A40000-0x0000000000B40000-memory.dmp

Filesize
1024KB

Download
memory/224-2-0x00000000009C0000-0x00000000009D3000-memory.dmp

Filesize
76KB

Download
memory/224-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/224-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/224-8-0x0000000000400000-0x000000000086B000-memory.dmp

Filesize
4.4MB

Download
memory/224-9-0x00000000009C0000-0x00000000009D3000-memory.dmp

Filesize
76KB

Download
memory/1376-12-0x00000000004A0000-0x00000000004B5000-memory.dmp

Filesize
84KB

Download
memory/1376-14-0x00000000004A0000-0x00000000004B5000-memory.dmp

Filesize
84KB

Download
memory/1376-15-0x00000000004A0000-0x00000000004B5000-memory.dmp

Filesize
84KB

Download
memory/4972-11-0x0000000000400000-0x000000000086B000-memory.dmp

Filesize
4.4MB

Download
memory/4972-16-0x0000000000400000-0x000000000086B000-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