tofsee | 83513d4b9266cea1afd40e52eac3b8799a4a74480621fa0fb2471c3053c0838c

General

Target

ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe
Size

14.4MB
MD5

ff827ff08c5a827f4031097b116fb3fc
SHA1

92137fc5964f93777ac2d22ab35cf89a59919616
SHA256

83513d4b9266cea1afd40e52eac3b8799a4a74480621fa0fb2471c3053c0838c
SHA512

f640dee3a5ea5514ad0853f54f5df86f0b3dfe22b245c04ac9c3fb8d3287aa9b9ad7abe6f42d8b8e1708dc21734220f695c576adb447e29fcffe918793649486
SSDEEP

98304:ejDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDj:

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

Windows security bypass 2 TTPs 1 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\ttmezrej = "0"	svchost.exe

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

Processes:

netsh.exe

pid process

2052 netsh.exe

pid	process
2052	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\ttmezrej\ImagePath = "C:\\Windows\\SysWOW64\\ttmezrej\\rwskilx.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

2660 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

rwskilx.exe

pid process

2292 rwskilx.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

rwskilx.exe

description pid process target process

PID 2292 set thread context of 2660 2292 rwskilx.exe svchost.exe
Launches sc.exe 3 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exesc.exesc.exe

pid process

2740 sc.exe
2284 sc.exe
2836 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2660	svchost.exe

pid	process
2292	rwskilx.exe

description	pid	process	target process
PID 2292 set thread context of 2660	2292	rwskilx.exe	svchost.exe

pid	process
2740	sc.exe
2284	sc.exe
2836	sc.exe

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

Processes:

netsh.exe

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

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

Processes:

sc.exesc.exerwskilx.exesvchost.exenetsh.exeff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.execmd.execmd.exesc.exe

description	ioc	process
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	rwskilx.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.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

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exerwskilx.exe

description	pid	process	target process
PID 236 wrote to memory of 1716	236	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	cmd.exe
PID 236 wrote to memory of 1716	236	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	cmd.exe
PID 236 wrote to memory of 1716	236	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	cmd.exe
PID 236 wrote to memory of 1716	236	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	cmd.exe
PID 236 wrote to memory of 2536	236	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	cmd.exe
PID 236 wrote to memory of 2536	236	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	cmd.exe
PID 236 wrote to memory of 2536	236	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	cmd.exe
PID 236 wrote to memory of 2536	236	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	cmd.exe
PID 236 wrote to memory of 2284	236	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	sc.exe
PID 236 wrote to memory of 2284	236	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	sc.exe
PID 236 wrote to memory of 2284	236	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	sc.exe
PID 236 wrote to memory of 2284	236	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	sc.exe
PID 236 wrote to memory of 2836	236	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	sc.exe
PID 236 wrote to memory of 2836	236	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	sc.exe
PID 236 wrote to memory of 2836	236	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	sc.exe
PID 236 wrote to memory of 2836	236	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	sc.exe
PID 236 wrote to memory of 2740	236	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	sc.exe
PID 236 wrote to memory of 2740	236	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	sc.exe
PID 236 wrote to memory of 2740	236	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	sc.exe
PID 236 wrote to memory of 2740	236	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	sc.exe
PID 236 wrote to memory of 2052	236	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	netsh.exe
PID 236 wrote to memory of 2052	236	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	netsh.exe
PID 236 wrote to memory of 2052	236	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	netsh.exe
PID 236 wrote to memory of 2052	236	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	netsh.exe
PID 2292 wrote to memory of 2660	2292	rwskilx.exe	svchost.exe
PID 2292 wrote to memory of 2660	2292	rwskilx.exe	svchost.exe
PID 2292 wrote to memory of 2660	2292	rwskilx.exe	svchost.exe
PID 2292 wrote to memory of 2660	2292	rwskilx.exe	svchost.exe
PID 2292 wrote to memory of 2660	2292	rwskilx.exe	svchost.exe
PID 2292 wrote to memory of 2660	2292	rwskilx.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:236
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ttmezrej\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1716
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rwskilx.exe" C:\Windows\SysWOW64\ttmezrej\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2536
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ttmezrej binPath= "C:\Windows\SysWOW64\ttmezrej\rwskilx.exe /d\"C:\Users\Admin\AppData\Local\Temp\ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2284
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ttmezrej "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2836
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ttmezrej
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2740
- 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:2052

C:\Windows\SysWOW64\ttmezrej\rwskilx.exe
C:\Windows\SysWOW64\ttmezrej\rwskilx.exe /d"C:\Users\Admin\AppData\Local\Temp\ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2292
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - 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

2

T1562

Disable or Modify System Firewall

1

T1562.004

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

System Information Discovery

1

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\rwskilx.exe

Filesize
12.9MB

MD5
0152169a47155dd1402a3fd9d77f0bad

SHA1
e9800da8c848cebe32cb578986590f0e46aec2e6

SHA256
ac226e6ad3a723e317e2327c0c261c76e2d1be0188f30d74b6be0b78c0e7dc36

SHA512
7a69481842e1e628cac115bd7ebedfcf85731daf1c2999f9d53bcd1ba9c4613fdbc796535d48b875bc7506f2494fb27ea4e6c9dd5ffa1e704f6d3fcdfbc868e3

Download Submit
memory/236-1-0x00000000005C0000-0x00000000006C0000-memory.dmp

Filesize
1024KB

Download
memory/236-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/236-2-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/236-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/236-8-0x0000000000400000-0x00000000004AF000-memory.dmp

Filesize
700KB

Download
memory/2292-16-0x0000000000400000-0x00000000004AF000-memory.dmp

Filesize
700KB

Download
memory/2660-15-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2660-13-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2660-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2660-10-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/2660-17-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads