tofsee | b6cf6e78306d7eb742e4f758aad5eea3248fdd6c6243ee069e90e9c4c64c373e

General

Target

40a22b8b25173fab796f01c5f6279cb8_JaffaCakes118.exe
Size

14.2MB
MD5

40a22b8b25173fab796f01c5f6279cb8
SHA1

2e23ee8c8f97fa749637694b0d00025800157f68
SHA256

b6cf6e78306d7eb742e4f758aad5eea3248fdd6c6243ee069e90e9c4c64c373e
SHA512

b580fee075112912c366c6f8fee223a7afb5d5e78c86989344285df35b5ebc48a072ec3a55ee5713d705dc553e907f14c7b5722e55209c23611077161c883c50
SSDEEP

6144:ArxbJOIoKZyaaUo9t+m7c74mOGjZP6NEpTvBzRxkac1B:MF/ZyaaUk+m7c7ZRiNEpTGa

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

pid	Process
32	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\xivqsuwl\ImagePath = "C:\\Windows\\SysWOW64\\xivqsuwl\\oavszyym.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-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	40a22b8b25173fab796f01c5f6279cb8_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
884	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
868	oavszyym.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 868 set thread context of 884	868	oavszyym.exe	105

Launches sc.exe 3 IoCs

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

pid	Process
2516	sc.exe
4020	sc.exe
1012	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
724	3372	WerFault.exe	84
3244	868	WerFault.exe	98

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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	oavszyym.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.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	40a22b8b25173fab796f01c5f6279cb8_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 23 IoCs

description	pid	Process	procid_target
PID 3372 wrote to memory of 1600	3372	40a22b8b25173fab796f01c5f6279cb8_JaffaCakes118.exe	88
PID 3372 wrote to memory of 1600	3372	40a22b8b25173fab796f01c5f6279cb8_JaffaCakes118.exe	88
PID 3372 wrote to memory of 1600	3372	40a22b8b25173fab796f01c5f6279cb8_JaffaCakes118.exe	88
PID 3372 wrote to memory of 3564	3372	40a22b8b25173fab796f01c5f6279cb8_JaffaCakes118.exe	90
PID 3372 wrote to memory of 3564	3372	40a22b8b25173fab796f01c5f6279cb8_JaffaCakes118.exe	90
PID 3372 wrote to memory of 3564	3372	40a22b8b25173fab796f01c5f6279cb8_JaffaCakes118.exe	90
PID 3372 wrote to memory of 2516	3372	40a22b8b25173fab796f01c5f6279cb8_JaffaCakes118.exe	92
PID 3372 wrote to memory of 2516	3372	40a22b8b25173fab796f01c5f6279cb8_JaffaCakes118.exe	92
PID 3372 wrote to memory of 2516	3372	40a22b8b25173fab796f01c5f6279cb8_JaffaCakes118.exe	92
PID 3372 wrote to memory of 4020	3372	40a22b8b25173fab796f01c5f6279cb8_JaffaCakes118.exe	94
PID 3372 wrote to memory of 4020	3372	40a22b8b25173fab796f01c5f6279cb8_JaffaCakes118.exe	94
PID 3372 wrote to memory of 4020	3372	40a22b8b25173fab796f01c5f6279cb8_JaffaCakes118.exe	94
PID 3372 wrote to memory of 1012	3372	40a22b8b25173fab796f01c5f6279cb8_JaffaCakes118.exe	96
PID 3372 wrote to memory of 1012	3372	40a22b8b25173fab796f01c5f6279cb8_JaffaCakes118.exe	96
PID 3372 wrote to memory of 1012	3372	40a22b8b25173fab796f01c5f6279cb8_JaffaCakes118.exe	96
PID 3372 wrote to memory of 32	3372	40a22b8b25173fab796f01c5f6279cb8_JaffaCakes118.exe	99
PID 3372 wrote to memory of 32	3372	40a22b8b25173fab796f01c5f6279cb8_JaffaCakes118.exe	99
PID 3372 wrote to memory of 32	3372	40a22b8b25173fab796f01c5f6279cb8_JaffaCakes118.exe	99
PID 868 wrote to memory of 884	868	oavszyym.exe	105
PID 868 wrote to memory of 884	868	oavszyym.exe	105
PID 868 wrote to memory of 884	868	oavszyym.exe	105
PID 868 wrote to memory of 884	868	oavszyym.exe	105
PID 868 wrote to memory of 884	868	oavszyym.exe	105

C:\Users\Admin\AppData\Local\Temp\40a22b8b25173fab796f01c5f6279cb8_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\40a22b8b25173fab796f01c5f6279cb8_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3372
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xivqsuwl\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1600
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\oavszyym.exe" C:\Windows\SysWOW64\xivqsuwl\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3564
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create xivqsuwl binPath= "C:\Windows\SysWOW64\xivqsuwl\oavszyym.exe /d\"C:\Users\Admin\AppData\Local\Temp\40a22b8b25173fab796f01c5f6279cb8_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2516
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description xivqsuwl "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 xivqsuwl
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1012
- 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:32
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3372 -s 656
  2⤵
  - Program crash
  PID:724

C:\Windows\SysWOW64\xivqsuwl\oavszyym.exe
C:\Windows\SysWOW64\xivqsuwl\oavszyym.exe /d"C:\Users\Admin\AppData\Local\Temp\40a22b8b25173fab796f01c5f6279cb8_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:868
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:884
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 868 -s 516
  2⤵
  - Program crash
  PID:3244

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 3372 -ip 3372
1⤵
PID:2648

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 868 -ip 868
1⤵
PID:4016

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\oavszyym.exe

Filesize
12.6MB

MD5
098eeb54e16e7dd9f85fad6538480f6e

SHA1
f9b3ad57da7282748fe93952cc944cab96b06627

SHA256
a52e0d1e623840afb6bb5a2c6c8b3c2ed569016d5a89ae49051e862ca867118c

SHA512
0ecc7198a59ac09c6195aa0fb66d36ca3188faaf4294b545943b5bb35be0d95fa543c24b9be59263b49920479b3be784a3e6a0465ded77e20563c50845639644

Download Submit
memory/868-13-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download
memory/868-12-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download
memory/868-11-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download
memory/868-19-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download
memory/884-14-0x00000000008B0000-0x00000000008C5000-memory.dmp

Filesize
84KB

Download
memory/884-16-0x00000000008B0000-0x00000000008C5000-memory.dmp

Filesize
84KB

Download
memory/884-17-0x00000000008B0000-0x00000000008C5000-memory.dmp

Filesize
84KB

Download
memory/3372-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3372-2-0x00000000004D0000-0x00000000004E3000-memory.dmp

Filesize
76KB

Download
memory/3372-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3372-9-0x00000000004D0000-0x00000000004E3000-memory.dmp

Filesize
76KB

Download
memory/3372-8-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download
memory/3372-1-0x0000000000500000-0x0000000000600000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads