tofsee | a3bb0d7755666457b022955aa09ee635265af13206520a4b3bbf447cdc61a398

General

Target

JaffaCakes118_a3bb0d7755666457b022955aa09ee635265af13206520a4b3bbf447cdc61a398.exe
Size

167KB
MD5

8febb6205b517d7e07c7158dc6c90674
SHA1

26a9a0f0b9b362e97872a88eb66ff455792d7a21
SHA256

a3bb0d7755666457b022955aa09ee635265af13206520a4b3bbf447cdc61a398
SHA512

110904a7aca8fb540f0b2b5d3af670df874d5123ef965818e497868b3d958ec30d30786c86d0d9353e500b894ae48801819b7f3a7fab8175ff5ff11fb583ac06
SSDEEP

1536:MBOUmWGCZfdtPLMyjDoI3AuVytQxku7y68Nud2cEq1k/2lnUGV25PICecrDBdJgz:lcxjDCmmMMcjUFGV25gYJVS9H6dYs

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
2508	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\nscslfeg\ImagePath = "C:\\Windows\\SysWOW64\\nscslfeg\\mrnfdgs.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-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	JaffaCakes118_a3bb0d7755666457b022955aa09ee635265af13206520a4b3bbf447cdc61a398.exe

Deletes itself 1 IoCs

pid	Process
732	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2680	mrnfdgs.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2680 set thread context of 732	2680	mrnfdgs.exe	98

Launches sc.exe 3 IoCs

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

pid	Process
3444	sc.exe
3576	sc.exe
2948	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

Program crash 2 IoCs

pid	pid_target	Process	procid_target
2668	2912	WerFault.exe	81
3588	2680	WerFault.exe	92

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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_a3bb0d7755666457b022955aa09ee635265af13206520a4b3bbf447cdc61a398.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mrnfdgs.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2912 wrote to memory of 5052	2912	JaffaCakes118_a3bb0d7755666457b022955aa09ee635265af13206520a4b3bbf447cdc61a398.exe	82
PID 2912 wrote to memory of 5052	2912	JaffaCakes118_a3bb0d7755666457b022955aa09ee635265af13206520a4b3bbf447cdc61a398.exe	82
PID 2912 wrote to memory of 5052	2912	JaffaCakes118_a3bb0d7755666457b022955aa09ee635265af13206520a4b3bbf447cdc61a398.exe	82
PID 2912 wrote to memory of 4844	2912	JaffaCakes118_a3bb0d7755666457b022955aa09ee635265af13206520a4b3bbf447cdc61a398.exe	84
PID 2912 wrote to memory of 4844	2912	JaffaCakes118_a3bb0d7755666457b022955aa09ee635265af13206520a4b3bbf447cdc61a398.exe	84
PID 2912 wrote to memory of 4844	2912	JaffaCakes118_a3bb0d7755666457b022955aa09ee635265af13206520a4b3bbf447cdc61a398.exe	84
PID 2912 wrote to memory of 3444	2912	JaffaCakes118_a3bb0d7755666457b022955aa09ee635265af13206520a4b3bbf447cdc61a398.exe	86
PID 2912 wrote to memory of 3444	2912	JaffaCakes118_a3bb0d7755666457b022955aa09ee635265af13206520a4b3bbf447cdc61a398.exe	86
PID 2912 wrote to memory of 3444	2912	JaffaCakes118_a3bb0d7755666457b022955aa09ee635265af13206520a4b3bbf447cdc61a398.exe	86
PID 2912 wrote to memory of 3576	2912	JaffaCakes118_a3bb0d7755666457b022955aa09ee635265af13206520a4b3bbf447cdc61a398.exe	88
PID 2912 wrote to memory of 3576	2912	JaffaCakes118_a3bb0d7755666457b022955aa09ee635265af13206520a4b3bbf447cdc61a398.exe	88
PID 2912 wrote to memory of 3576	2912	JaffaCakes118_a3bb0d7755666457b022955aa09ee635265af13206520a4b3bbf447cdc61a398.exe	88
PID 2912 wrote to memory of 2948	2912	JaffaCakes118_a3bb0d7755666457b022955aa09ee635265af13206520a4b3bbf447cdc61a398.exe	90
PID 2912 wrote to memory of 2948	2912	JaffaCakes118_a3bb0d7755666457b022955aa09ee635265af13206520a4b3bbf447cdc61a398.exe	90
PID 2912 wrote to memory of 2948	2912	JaffaCakes118_a3bb0d7755666457b022955aa09ee635265af13206520a4b3bbf447cdc61a398.exe	90
PID 2912 wrote to memory of 2508	2912	JaffaCakes118_a3bb0d7755666457b022955aa09ee635265af13206520a4b3bbf447cdc61a398.exe	93
PID 2912 wrote to memory of 2508	2912	JaffaCakes118_a3bb0d7755666457b022955aa09ee635265af13206520a4b3bbf447cdc61a398.exe	93
PID 2912 wrote to memory of 2508	2912	JaffaCakes118_a3bb0d7755666457b022955aa09ee635265af13206520a4b3bbf447cdc61a398.exe	93
PID 2680 wrote to memory of 732	2680	mrnfdgs.exe	98
PID 2680 wrote to memory of 732	2680	mrnfdgs.exe	98
PID 2680 wrote to memory of 732	2680	mrnfdgs.exe	98
PID 2680 wrote to memory of 732	2680	mrnfdgs.exe	98
PID 2680 wrote to memory of 732	2680	mrnfdgs.exe	98

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a3bb0d7755666457b022955aa09ee635265af13206520a4b3bbf447cdc61a398.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a3bb0d7755666457b022955aa09ee635265af13206520a4b3bbf447cdc61a398.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2912
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\nscslfeg\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:5052
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\mrnfdgs.exe" C:\Windows\SysWOW64\nscslfeg\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4844
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create nscslfeg binPath= "C:\Windows\SysWOW64\nscslfeg\mrnfdgs.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a3bb0d7755666457b022955aa09ee635265af13206520a4b3bbf447cdc61a398.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3444
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description nscslfeg "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3576
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start nscslfeg
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2948
- 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:2508
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2912 -s 792
  2⤵
  - Program crash
  PID:2668

C:\Windows\SysWOW64\nscslfeg\mrnfdgs.exe
C:\Windows\SysWOW64\nscslfeg\mrnfdgs.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a3bb0d7755666457b022955aa09ee635265af13206520a4b3bbf447cdc61a398.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2680
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:732
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2680 -s 532
  2⤵
  - Program crash
  PID:3588

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 2912 -ip 2912
1⤵
PID:3092

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 2680 -ip 2680
1⤵
PID:4004

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\mrnfdgs.exe

Filesize
14.4MB

MD5
10de46bc21126eafc202ad9f044144a5

SHA1
6fcd5b2ac33e24c4f736ddc7c60697c4423b91aa

SHA256
98b5567aee3bdca1ba6865c2b275c8ec890add267c682e582e3ec09f628d9521

SHA512
cdba02cad8db6ce645df7418449522d5be8b8577425bc1c0129624eabc44bf1ea6de1745e010c351cac747cf1bce879e774cb6972625bddb5aea47b1f46c7a6b

Download Submit
memory/732-14-0x0000000000B90000-0x0000000000BA5000-memory.dmp

Filesize
84KB

Download
memory/732-17-0x0000000000B90000-0x0000000000BA5000-memory.dmp

Filesize
84KB

Download
memory/732-16-0x0000000000B90000-0x0000000000BA5000-memory.dmp

Filesize
84KB

Download
memory/2680-12-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2680-11-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2680-13-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2680-19-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2912-9-0x00000000020C0000-0x00000000020D3000-memory.dmp

Filesize
76KB

Download
memory/2912-8-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2912-2-0x00000000020C0000-0x00000000020D3000-memory.dmp

Filesize
76KB

Download
memory/2912-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2912-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2912-1-0x00000000006C0000-0x00000000007C0000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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