tofsee | 6b106fead48601e7842cdcf7d3220e4b9da5f82fbc189a4b83401ee5b13a496b

General

Target

JaffaCakes118_ac1587025078cd63e45f7fad10149100.exe
Size

12.8MB
MD5

ac1587025078cd63e45f7fad10149100
SHA1

e377d25cb1cc15d29a4a27dc4f53c9124085d902
SHA256

6b106fead48601e7842cdcf7d3220e4b9da5f82fbc189a4b83401ee5b13a496b
SHA512

85eff64f830223362020b53869fed151e20201130633fe8f54502a2616cdb63a1c835f0a55e92778fa2d9755f11c84f918d3a717644311de1a4f003077442f01
SSDEEP

12288:LZj/zVtLo3uWXQDWT7CfuUNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNL:LV/zVxTWT7CW

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
2360	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\lujpvmzb\ImagePath = "C:\\Windows\\SysWOW64\\lujpvmzb\\vkxtfexj.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_ac1587025078cd63e45f7fad10149100.exe

Deletes itself 1 IoCs

pid	Process
756	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1132	vkxtfexj.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1132 set thread context of 756	1132	vkxtfexj.exe	100

Launches sc.exe 3 IoCs

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

pid	Process
3824	sc.exe
4956	sc.exe
1800	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
4228	680	WerFault.exe	82
2528	1132	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	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	vkxtfexj.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_ac1587025078cd63e45f7fad10149100.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 680 wrote to memory of 3716	680	JaffaCakes118_ac1587025078cd63e45f7fad10149100.exe	83
PID 680 wrote to memory of 3716	680	JaffaCakes118_ac1587025078cd63e45f7fad10149100.exe	83
PID 680 wrote to memory of 3716	680	JaffaCakes118_ac1587025078cd63e45f7fad10149100.exe	83
PID 680 wrote to memory of 1940	680	JaffaCakes118_ac1587025078cd63e45f7fad10149100.exe	85
PID 680 wrote to memory of 1940	680	JaffaCakes118_ac1587025078cd63e45f7fad10149100.exe	85
PID 680 wrote to memory of 1940	680	JaffaCakes118_ac1587025078cd63e45f7fad10149100.exe	85
PID 680 wrote to memory of 3824	680	JaffaCakes118_ac1587025078cd63e45f7fad10149100.exe	87
PID 680 wrote to memory of 3824	680	JaffaCakes118_ac1587025078cd63e45f7fad10149100.exe	87
PID 680 wrote to memory of 3824	680	JaffaCakes118_ac1587025078cd63e45f7fad10149100.exe	87
PID 680 wrote to memory of 4956	680	JaffaCakes118_ac1587025078cd63e45f7fad10149100.exe	89
PID 680 wrote to memory of 4956	680	JaffaCakes118_ac1587025078cd63e45f7fad10149100.exe	89
PID 680 wrote to memory of 4956	680	JaffaCakes118_ac1587025078cd63e45f7fad10149100.exe	89
PID 680 wrote to memory of 1800	680	JaffaCakes118_ac1587025078cd63e45f7fad10149100.exe	91
PID 680 wrote to memory of 1800	680	JaffaCakes118_ac1587025078cd63e45f7fad10149100.exe	91
PID 680 wrote to memory of 1800	680	JaffaCakes118_ac1587025078cd63e45f7fad10149100.exe	91
PID 680 wrote to memory of 2360	680	JaffaCakes118_ac1587025078cd63e45f7fad10149100.exe	94
PID 680 wrote to memory of 2360	680	JaffaCakes118_ac1587025078cd63e45f7fad10149100.exe	94
PID 680 wrote to memory of 2360	680	JaffaCakes118_ac1587025078cd63e45f7fad10149100.exe	94
PID 1132 wrote to memory of 756	1132	vkxtfexj.exe	100
PID 1132 wrote to memory of 756	1132	vkxtfexj.exe	100
PID 1132 wrote to memory of 756	1132	vkxtfexj.exe	100
PID 1132 wrote to memory of 756	1132	vkxtfexj.exe	100
PID 1132 wrote to memory of 756	1132	vkxtfexj.exe	100

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_ac1587025078cd63e45f7fad10149100.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_ac1587025078cd63e45f7fad10149100.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:680
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lujpvmzb\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3716
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vkxtfexj.exe" C:\Windows\SysWOW64\lujpvmzb\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1940
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create lujpvmzb binPath= "C:\Windows\SysWOW64\lujpvmzb\vkxtfexj.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_ac1587025078cd63e45f7fad10149100.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3824
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description lujpvmzb "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4956
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start lujpvmzb
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1800
- 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:2360
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 680 -s 1208
  2⤵
  - Program crash
  PID:4228

C:\Windows\SysWOW64\lujpvmzb\vkxtfexj.exe
C:\Windows\SysWOW64\lujpvmzb\vkxtfexj.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_ac1587025078cd63e45f7fad10149100.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1132
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:756
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1132 -s 512
  2⤵
  - Program crash
  PID:2528

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 680 -ip 680
1⤵
PID:1924

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 368 -p 1132 -ip 1132
1⤵
PID:2548

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\vkxtfexj.exe

Filesize
11.7MB

MD5
0851119e036a418a047923323b97b3c9

SHA1
bef35736d41ae396f026673a8648393352a9a392

SHA256
5b771e3d9b17816c3e1ed9a1a53d10a1b789f9755127bcf04fe5ece3f516b671

SHA512
f09ee61527d65fc98d46c83fe005c8f646ffbc3e0240edc3c9f13abf81ecd66ce4c8ae2a0a113ffbaba02ce3c60b6962884b32e3bc47a82bf61428973a14c340

Download Submit
memory/680-8-0x0000000000400000-0x000000000044D000-memory.dmp

Filesize
308KB

Download
memory/680-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/680-2-0x00000000001D0000-0x00000000001E3000-memory.dmp

Filesize
76KB

Download
memory/680-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/680-9-0x00000000001D0000-0x00000000001E3000-memory.dmp

Filesize
76KB

Download
memory/680-1-0x00000000004D0000-0x00000000005D0000-memory.dmp

Filesize
1024KB

Download
memory/756-15-0x0000000000E30000-0x0000000000E45000-memory.dmp

Filesize
84KB

Download
memory/756-13-0x0000000000E30000-0x0000000000E45000-memory.dmp

Filesize
84KB

Download
memory/756-16-0x0000000000E30000-0x0000000000E45000-memory.dmp

Filesize
84KB

Download
memory/1132-11-0x0000000000400000-0x000000000044D000-memory.dmp

Filesize
308KB

Download
memory/1132-12-0x0000000000400000-0x000000000044D000-memory.dmp

Filesize
308KB

Download
memory/1132-17-0x0000000000400000-0x000000000044D000-memory.dmp

Filesize
308KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads