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
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

1820 netsh.exe

pid	process
1820	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\vnnceftj\ImagePath = "C:\\Windows\\SysWOW64\\vnnceftj\\tadbccsg.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

Processes:

ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-355097885-2402257403-2971294179-1000\Control Panel\International\Geo\Nation	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

2620 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

tadbccsg.exe

pid process

2452 tadbccsg.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

tadbccsg.exe

description pid process target process

PID 2452 set thread context of 2620 2452 tadbccsg.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

2208 sc.exe
4020 sc.exe
2396 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2620	svchost.exe

pid	process
2452	tadbccsg.exe

description	pid	process	target process
PID 2452 set thread context of 2620	2452	tadbccsg.exe	svchost.exe

pid	process
2208	sc.exe
4020	sc.exe
2396	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 value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid pid_target process target process

2144 5112 WerFault.exe ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe
3664 2452 WerFault.exe tadbccsg.exe

pid	pid_target	process	target process
2144	5112	WerFault.exe	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe
3664	2452	WerFault.exe	tadbccsg.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:

ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exesc.exenetsh.execmd.execmd.exesc.exesc.exetadbccsg.exesvchost.exe

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

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exetadbccsg.exe

description	pid	process	target process
PID 5112 wrote to memory of 4956	5112	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	cmd.exe
PID 5112 wrote to memory of 4956	5112	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	cmd.exe
PID 5112 wrote to memory of 4956	5112	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	cmd.exe
PID 5112 wrote to memory of 3944	5112	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	cmd.exe
PID 5112 wrote to memory of 3944	5112	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	cmd.exe
PID 5112 wrote to memory of 3944	5112	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	cmd.exe
PID 5112 wrote to memory of 2208	5112	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	sc.exe
PID 5112 wrote to memory of 2208	5112	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	sc.exe
PID 5112 wrote to memory of 2208	5112	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	sc.exe
PID 5112 wrote to memory of 4020	5112	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	sc.exe
PID 5112 wrote to memory of 4020	5112	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	sc.exe
PID 5112 wrote to memory of 4020	5112	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	sc.exe
PID 5112 wrote to memory of 2396	5112	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	sc.exe
PID 5112 wrote to memory of 2396	5112	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	sc.exe
PID 5112 wrote to memory of 2396	5112	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	sc.exe
PID 5112 wrote to memory of 1820	5112	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	netsh.exe
PID 5112 wrote to memory of 1820	5112	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	netsh.exe
PID 5112 wrote to memory of 1820	5112	ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe	netsh.exe
PID 2452 wrote to memory of 2620	2452	tadbccsg.exe	svchost.exe
PID 2452 wrote to memory of 2620	2452	tadbccsg.exe	svchost.exe
PID 2452 wrote to memory of 2620	2452	tadbccsg.exe	svchost.exe
PID 2452 wrote to memory of 2620	2452	tadbccsg.exe	svchost.exe
PID 2452 wrote to memory of 2620	2452	tadbccsg.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\ff827ff08c5a827f4031097b116fb3fc_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5112
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vnnceftj\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4956
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\tadbccsg.exe" C:\Windows\SysWOW64\vnnceftj\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3944
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create vnnceftj binPath= "C:\Windows\SysWOW64\vnnceftj\tadbccsg.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:2208
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description vnnceftj "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4020
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start vnnceftj
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2396
- 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:1820
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5112 -s 1028
  2⤵
  - Program crash
  PID:2144

C:\Windows\SysWOW64\vnnceftj\tadbccsg.exe
C:\Windows\SysWOW64\vnnceftj\tadbccsg.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:2452
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2620
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2452 -s 512
  2⤵
  - Program crash
  PID:3664

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 5112 -ip 5112
1⤵
PID:4388

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 2452 -ip 2452
1⤵
PID:3076

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\tadbccsg.exe

Filesize
10.3MB

MD5
2f34b808901e8729d44b4fffff2e41ff

SHA1
520298586bf091b264310e277c09f8b460ec33ca

SHA256
d66363529b5412d3915e12e3ffd42b3321a027cc89b60afdc39b28098512ccbd

SHA512
1438dd430bc494c0733096fb0cfe489a09c55031c0ef685c4a43cd312b1795420cbf34892e1a0f61861348e687b9ffd2d4cf3ac26a91b13cbffd4a1780472492

Download Submit
memory/2452-13-0x0000000000400000-0x00000000004AF000-memory.dmp

Filesize
700KB

Download
memory/2452-11-0x0000000000400000-0x00000000004AF000-memory.dmp

Filesize
700KB

Download
memory/2452-12-0x0000000000400000-0x00000000004AF000-memory.dmp

Filesize
700KB

Download
memory/2452-18-0x0000000000400000-0x00000000004AF000-memory.dmp

Filesize
700KB

Download
memory/2620-14-0x0000000000850000-0x0000000000865000-memory.dmp

Filesize
84KB

Download
memory/2620-16-0x0000000000850000-0x0000000000865000-memory.dmp

Filesize
84KB

Download
memory/2620-17-0x0000000000850000-0x0000000000865000-memory.dmp

Filesize
84KB

Download
memory/5112-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/5112-2-0x0000000000640000-0x0000000000653000-memory.dmp

Filesize
76KB

Download
memory/5112-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/5112-9-0x0000000000640000-0x0000000000653000-memory.dmp

Filesize
76KB

Download
memory/5112-8-0x0000000000400000-0x00000000004AF000-memory.dmp

Filesize
700KB

Download
memory/5112-1-0x0000000000680000-0x0000000000780000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads