tofsee | 01515a4578f9a62830c1ca7689a77537806b53493877a53aacc46279f90ad219

General

Target

fc8a09cc8b58b2e8ccb5ceaad6f68465_JaffaCakes118.exe
Size

12.5MB
MD5

fc8a09cc8b58b2e8ccb5ceaad6f68465
SHA1

1ca93e1b4689c0397b859924ac6f56dc4544fafd
SHA256

01515a4578f9a62830c1ca7689a77537806b53493877a53aacc46279f90ad219
SHA512

55e400daa4ed27d4d7b184f750068d5fe58eedbfe1058d929698e25cf6fcee06bc65ff7ca349c22c9c3a39e357f2548b88084a7c5d9d872d9d857e1034d6872d
SSDEEP

98304:XdrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrL:X

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.ru

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Creates new service(s) 1 TTPs
persistence

Windows Service
T1543.003
Modifies Windows Firewall 2 TTPs 1 IoCs
evasion

Windows Service
T1543.003

Disable or Modify System Firewall
T1562.004

Processes:

netsh.exe

pid process

2140 netsh.exe

pid	process
2140	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\bvinwrkp\ImagePath = "C:\\Windows\\SysWOW64\\bvinwrkp\\vuikyvwo.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:

fc8a09cc8b58b2e8ccb5ceaad6f68465_JaffaCakes118.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1132431369-515282257-1998160155-1000\Control Panel\International\Geo\Nation	fc8a09cc8b58b2e8ccb5ceaad6f68465_JaffaCakes118.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

2844 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

vuikyvwo.exe

pid process

5108 vuikyvwo.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

vuikyvwo.exe

description pid process target process

PID 5108 set thread context of 2844 5108 vuikyvwo.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

2328 sc.exe
956 sc.exe
2516 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid pid_target process target process

4480 4724 WerFault.exe fc8a09cc8b58b2e8ccb5ceaad6f68465_JaffaCakes118.exe
3708 5108 WerFault.exe vuikyvwo.exe

pid	process
2844	svchost.exe

pid	process
5108	vuikyvwo.exe

description	pid	process	target process
PID 5108 set thread context of 2844	5108	vuikyvwo.exe	svchost.exe

pid	process
2328	sc.exe
956	sc.exe
2516	sc.exe

pid	pid_target	process	target process
4480	4724	WerFault.exe	fc8a09cc8b58b2e8ccb5ceaad6f68465_JaffaCakes118.exe
3708	5108	WerFault.exe	vuikyvwo.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

fc8a09cc8b58b2e8ccb5ceaad6f68465_JaffaCakes118.exevuikyvwo.exe

description	pid	process	target process
PID 4724 wrote to memory of 4108	4724	fc8a09cc8b58b2e8ccb5ceaad6f68465_JaffaCakes118.exe	cmd.exe
PID 4724 wrote to memory of 4108	4724	fc8a09cc8b58b2e8ccb5ceaad6f68465_JaffaCakes118.exe	cmd.exe
PID 4724 wrote to memory of 4108	4724	fc8a09cc8b58b2e8ccb5ceaad6f68465_JaffaCakes118.exe	cmd.exe
PID 4724 wrote to memory of 2980	4724	fc8a09cc8b58b2e8ccb5ceaad6f68465_JaffaCakes118.exe	cmd.exe
PID 4724 wrote to memory of 2980	4724	fc8a09cc8b58b2e8ccb5ceaad6f68465_JaffaCakes118.exe	cmd.exe
PID 4724 wrote to memory of 2980	4724	fc8a09cc8b58b2e8ccb5ceaad6f68465_JaffaCakes118.exe	cmd.exe
PID 4724 wrote to memory of 2516	4724	fc8a09cc8b58b2e8ccb5ceaad6f68465_JaffaCakes118.exe	sc.exe
PID 4724 wrote to memory of 2516	4724	fc8a09cc8b58b2e8ccb5ceaad6f68465_JaffaCakes118.exe	sc.exe
PID 4724 wrote to memory of 2516	4724	fc8a09cc8b58b2e8ccb5ceaad6f68465_JaffaCakes118.exe	sc.exe
PID 4724 wrote to memory of 2328	4724	fc8a09cc8b58b2e8ccb5ceaad6f68465_JaffaCakes118.exe	sc.exe
PID 4724 wrote to memory of 2328	4724	fc8a09cc8b58b2e8ccb5ceaad6f68465_JaffaCakes118.exe	sc.exe
PID 4724 wrote to memory of 2328	4724	fc8a09cc8b58b2e8ccb5ceaad6f68465_JaffaCakes118.exe	sc.exe
PID 4724 wrote to memory of 956	4724	fc8a09cc8b58b2e8ccb5ceaad6f68465_JaffaCakes118.exe	sc.exe
PID 4724 wrote to memory of 956	4724	fc8a09cc8b58b2e8ccb5ceaad6f68465_JaffaCakes118.exe	sc.exe
PID 4724 wrote to memory of 956	4724	fc8a09cc8b58b2e8ccb5ceaad6f68465_JaffaCakes118.exe	sc.exe
PID 4724 wrote to memory of 2140	4724	fc8a09cc8b58b2e8ccb5ceaad6f68465_JaffaCakes118.exe	netsh.exe
PID 4724 wrote to memory of 2140	4724	fc8a09cc8b58b2e8ccb5ceaad6f68465_JaffaCakes118.exe	netsh.exe
PID 4724 wrote to memory of 2140	4724	fc8a09cc8b58b2e8ccb5ceaad6f68465_JaffaCakes118.exe	netsh.exe
PID 5108 wrote to memory of 2844	5108	vuikyvwo.exe	svchost.exe
PID 5108 wrote to memory of 2844	5108	vuikyvwo.exe	svchost.exe
PID 5108 wrote to memory of 2844	5108	vuikyvwo.exe	svchost.exe
PID 5108 wrote to memory of 2844	5108	vuikyvwo.exe	svchost.exe
PID 5108 wrote to memory of 2844	5108	vuikyvwo.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\fc8a09cc8b58b2e8ccb5ceaad6f68465_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\fc8a09cc8b58b2e8ccb5ceaad6f68465_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4724

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bvinwrkp\
2⤵
PID:4108

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vuikyvwo.exe" C:\Windows\SysWOW64\bvinwrkp\
2⤵
PID:2980

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create bvinwrkp binPath= "C:\Windows\SysWOW64\bvinwrkp\vuikyvwo.exe /d\"C:\Users\Admin\AppData\Local\Temp\fc8a09cc8b58b2e8ccb5ceaad6f68465_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:2516

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description bvinwrkp "wifi internet conection"
2⤵
- Launches sc.exe
PID:2328

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start bvinwrkp
2⤵
- Launches sc.exe
PID:956

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
PID:2140

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4724 -s 1040
2⤵
- Program crash
PID:4480

C:\Windows\SysWOW64\bvinwrkp\vuikyvwo.exe
C:\Windows\SysWOW64\bvinwrkp\vuikyvwo.exe /d"C:\Users\Admin\AppData\Local\Temp\fc8a09cc8b58b2e8ccb5ceaad6f68465_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5108

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
- Deletes itself
PID:2844

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 5108 -s 520
2⤵
- Program crash
PID:3708

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 4724 -ip 4724
1⤵
PID:4484

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 5108 -ip 5108
1⤵
PID:2416

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

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

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\vuikyvwo.exe
Filesize
11.0MB

MD5
262faf56efb6e7801266baa7235b1ab0

SHA1
a1dd6750f68944cd2c43bdc7ec5fec699e4fcaae

SHA256
b79b65171f66f348fe03bb84e30d4edb99fa6c2fbab03841f1bdc6f3a04a5b9c

SHA512
2d0f3e1e96b7664f5749e91bcf28b6bc7777cf01af8e9798077b46f7fd91e1e05d89804de7abc8d4aeb5ad7c09b6b58e889f8aff916ad627a0e9162386612a01

Download Submit
memory/2844-16-0x0000000000CD0000-0x0000000000CE5000-memory.dmp

Filesize
84KB

Download
memory/2844-12-0x0000000000CD0000-0x0000000000CE5000-memory.dmp

Filesize
84KB

Download
memory/2844-18-0x0000000000CD0000-0x0000000000CE5000-memory.dmp

Filesize
84KB

Download
memory/2844-19-0x0000000000CD0000-0x0000000000CE5000-memory.dmp

Filesize
84KB

Download
memory/4724-4-0x0000000000400000-0x00000000004A5000-memory.dmp

Filesize
660KB

Download
memory/4724-2-0x0000000000620000-0x0000000000633000-memory.dmp

Filesize
76KB

Download
memory/4724-8-0x0000000000400000-0x00000000004A5000-memory.dmp

Filesize
660KB

Download
memory/4724-9-0x0000000000620000-0x0000000000633000-memory.dmp

Filesize
76KB

Download
memory/4724-1-0x00000000006A0000-0x00000000007A0000-memory.dmp

Filesize
1024KB

Download
memory/5108-10-0x0000000000690000-0x0000000000790000-memory.dmp

Filesize
1024KB

Download
memory/5108-11-0x0000000000400000-0x00000000004A5000-memory.dmp

Filesize
660KB

Download
memory/5108-17-0x0000000000400000-0x00000000004A5000-memory.dmp

Filesize
660KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads