tofsee | 1a4811320f690e716efa5a7ed56af191595b018e22a94d084eec6e2c28fd2e12

General

Target

27ebcd8b19cb731bd9261b185d134619_JaffaCakes118.exe
Size

13.5MB
MD5

27ebcd8b19cb731bd9261b185d134619
SHA1

677b28d035bd663d7e2933b4ec307606988571f7
SHA256

1a4811320f690e716efa5a7ed56af191595b018e22a94d084eec6e2c28fd2e12
SHA512

660f8925d12b955935c0b3b3f0b5498faca63f43c2673a626ae785a0d0eabaacbbf90a0b222bf6abd73e27f7743fa3a2fe5bfb82907e2cc5a33d41ae67f6b416
SSDEEP

98304:nYTPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPH:n

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.6

lazystax.ru

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan 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
764	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\xpbiqofk\ImagePath = "C:\\Windows\\SysWOW64\\xpbiqofk\\vskbxoki.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	27ebcd8b19cb731bd9261b185d134619_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
2660	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4864	vskbxoki.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4864 set thread context of 2660	4864	vskbxoki.exe	99

Launches sc.exe 3 IoCs

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

pid	Process
392	sc.exe
4676	sc.exe
4724	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

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	27ebcd8b19cb731bd9261b185d134619_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vskbxoki.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2268 wrote to memory of 5036	2268	27ebcd8b19cb731bd9261b185d134619_JaffaCakes118.exe	86
PID 2268 wrote to memory of 5036	2268	27ebcd8b19cb731bd9261b185d134619_JaffaCakes118.exe	86
PID 2268 wrote to memory of 5036	2268	27ebcd8b19cb731bd9261b185d134619_JaffaCakes118.exe	86
PID 2268 wrote to memory of 3688	2268	27ebcd8b19cb731bd9261b185d134619_JaffaCakes118.exe	88
PID 2268 wrote to memory of 3688	2268	27ebcd8b19cb731bd9261b185d134619_JaffaCakes118.exe	88
PID 2268 wrote to memory of 3688	2268	27ebcd8b19cb731bd9261b185d134619_JaffaCakes118.exe	88
PID 2268 wrote to memory of 392	2268	27ebcd8b19cb731bd9261b185d134619_JaffaCakes118.exe	90
PID 2268 wrote to memory of 392	2268	27ebcd8b19cb731bd9261b185d134619_JaffaCakes118.exe	90
PID 2268 wrote to memory of 392	2268	27ebcd8b19cb731bd9261b185d134619_JaffaCakes118.exe	90
PID 2268 wrote to memory of 4676	2268	27ebcd8b19cb731bd9261b185d134619_JaffaCakes118.exe	92
PID 2268 wrote to memory of 4676	2268	27ebcd8b19cb731bd9261b185d134619_JaffaCakes118.exe	92
PID 2268 wrote to memory of 4676	2268	27ebcd8b19cb731bd9261b185d134619_JaffaCakes118.exe	92
PID 2268 wrote to memory of 4724	2268	27ebcd8b19cb731bd9261b185d134619_JaffaCakes118.exe	94
PID 2268 wrote to memory of 4724	2268	27ebcd8b19cb731bd9261b185d134619_JaffaCakes118.exe	94
PID 2268 wrote to memory of 4724	2268	27ebcd8b19cb731bd9261b185d134619_JaffaCakes118.exe	94
PID 2268 wrote to memory of 764	2268	27ebcd8b19cb731bd9261b185d134619_JaffaCakes118.exe	97
PID 2268 wrote to memory of 764	2268	27ebcd8b19cb731bd9261b185d134619_JaffaCakes118.exe	97
PID 2268 wrote to memory of 764	2268	27ebcd8b19cb731bd9261b185d134619_JaffaCakes118.exe	97
PID 4864 wrote to memory of 2660	4864	vskbxoki.exe	99
PID 4864 wrote to memory of 2660	4864	vskbxoki.exe	99
PID 4864 wrote to memory of 2660	4864	vskbxoki.exe	99
PID 4864 wrote to memory of 2660	4864	vskbxoki.exe	99
PID 4864 wrote to memory of 2660	4864	vskbxoki.exe	99

C:\Users\Admin\AppData\Local\Temp\27ebcd8b19cb731bd9261b185d134619_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\27ebcd8b19cb731bd9261b185d134619_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2268
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xpbiqofk\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:5036
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vskbxoki.exe" C:\Windows\SysWOW64\xpbiqofk\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3688
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create xpbiqofk binPath= "C:\Windows\SysWOW64\xpbiqofk\vskbxoki.exe /d\"C:\Users\Admin\AppData\Local\Temp\27ebcd8b19cb731bd9261b185d134619_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:392
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description xpbiqofk "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4676
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start xpbiqofk
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4724
- 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:764

C:\Windows\SysWOW64\xpbiqofk\vskbxoki.exe
C:\Windows\SysWOW64\xpbiqofk\vskbxoki.exe /d"C:\Users\Admin\AppData\Local\Temp\27ebcd8b19cb731bd9261b185d134619_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4864
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2660

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\vskbxoki.exe

Filesize
14.4MB

MD5
c0c38ca0209787333ae15a0756e54681

SHA1
d20a14926519fba88cc96e4e01aa4dfd27e9e68b

SHA256
73fd5331b4e3921eb6bd4aee1bf72e75226716beb15379cbf7b792a1f805a33f

SHA512
05e6720d424409f38e244805e3919c94583215aafe310eedfcc9c6340446aa6e2769edc3331e5a8909bc1062be30238d6b6ed997b029f778f08ef065e2a395c5

Download Submit
memory/2268-1-0x0000000000D40000-0x0000000000E40000-memory.dmp

Filesize
1024KB

Download
memory/2268-2-0x0000000000CF0000-0x0000000000D03000-memory.dmp

Filesize
76KB

Download
memory/2268-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2268-7-0x0000000000400000-0x0000000000C17000-memory.dmp

Filesize
8.1MB

Download
memory/2268-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2268-8-0x0000000000CF0000-0x0000000000D03000-memory.dmp

Filesize
76KB

Download
memory/2660-11-0x0000000000C10000-0x0000000000C25000-memory.dmp

Filesize
84KB

Download
memory/2660-14-0x0000000000C10000-0x0000000000C25000-memory.dmp

Filesize
84KB

Download
memory/2660-15-0x0000000000C10000-0x0000000000C25000-memory.dmp

Filesize
84KB

Download
memory/4864-12-0x0000000000400000-0x0000000000C17000-memory.dmp

Filesize
8.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads