tofsee | ea8ca76b2aef52390b22087b4535723f4f11f82911bd78a7ed1bd6cfbdd46d8b

General

Target

f9496c106987b667046b3895dea478e6_JaffaCakes118.exe
Size

13.0MB
MD5

f9496c106987b667046b3895dea478e6
SHA1

569bf8c79ad8488eb03343929118a52a223f8296
SHA256

ea8ca76b2aef52390b22087b4535723f4f11f82911bd78a7ed1bd6cfbdd46d8b
SHA512

8ef9534565f25f5a84a37fbd4af6ee94a0d4c643b3c80481818d07645c2d4f632a325e05ae2156b118fc2315431057a988d39055ad5e2121b0fefaa1a1556f70
SSDEEP

12288:3l5qOcvT9o+egMU+HoWfprc0sssssssssssssssssssssssssssssssssssssss:xcvT9ofeqrc

Score

10^/10

tofsee evasion persistence 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) 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

1696 netsh.exe

pid	process
1696	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\yhvivwpp\ImagePath = "C:\\Windows\\SysWOW64\\yhvivwpp\\rrkxjgfh.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:

f9496c106987b667046b3895dea478e6_JaffaCakes118.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2288054676-1871194608-3559553667-1000\Control Panel\International\Geo\Nation	f9496c106987b667046b3895dea478e6_JaffaCakes118.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

4296 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

rrkxjgfh.exe

pid process

676 rrkxjgfh.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

rrkxjgfh.exe

description pid process target process

PID 676 set thread context of 4296 676 rrkxjgfh.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

3504 sc.exe
728 sc.exe
2560 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

3536 1672 WerFault.exe f9496c106987b667046b3895dea478e6_JaffaCakes118.exe
1320 676 WerFault.exe rrkxjgfh.exe

pid	process
4296	svchost.exe

pid	process
676	rrkxjgfh.exe

description	pid	process	target process
PID 676 set thread context of 4296	676	rrkxjgfh.exe	svchost.exe

pid	process
3504	sc.exe
728	sc.exe
2560	sc.exe

pid	pid_target	process	target process
3536	1672	WerFault.exe	f9496c106987b667046b3895dea478e6_JaffaCakes118.exe
1320	676	WerFault.exe	rrkxjgfh.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

f9496c106987b667046b3895dea478e6_JaffaCakes118.exerrkxjgfh.exe

description	pid	process	target process
PID 1672 wrote to memory of 4956	1672	f9496c106987b667046b3895dea478e6_JaffaCakes118.exe	cmd.exe
PID 1672 wrote to memory of 4956	1672	f9496c106987b667046b3895dea478e6_JaffaCakes118.exe	cmd.exe
PID 1672 wrote to memory of 4956	1672	f9496c106987b667046b3895dea478e6_JaffaCakes118.exe	cmd.exe
PID 1672 wrote to memory of 3780	1672	f9496c106987b667046b3895dea478e6_JaffaCakes118.exe	cmd.exe
PID 1672 wrote to memory of 3780	1672	f9496c106987b667046b3895dea478e6_JaffaCakes118.exe	cmd.exe
PID 1672 wrote to memory of 3780	1672	f9496c106987b667046b3895dea478e6_JaffaCakes118.exe	cmd.exe
PID 1672 wrote to memory of 728	1672	f9496c106987b667046b3895dea478e6_JaffaCakes118.exe	sc.exe
PID 1672 wrote to memory of 728	1672	f9496c106987b667046b3895dea478e6_JaffaCakes118.exe	sc.exe
PID 1672 wrote to memory of 728	1672	f9496c106987b667046b3895dea478e6_JaffaCakes118.exe	sc.exe
PID 1672 wrote to memory of 2560	1672	f9496c106987b667046b3895dea478e6_JaffaCakes118.exe	sc.exe
PID 1672 wrote to memory of 2560	1672	f9496c106987b667046b3895dea478e6_JaffaCakes118.exe	sc.exe
PID 1672 wrote to memory of 2560	1672	f9496c106987b667046b3895dea478e6_JaffaCakes118.exe	sc.exe
PID 1672 wrote to memory of 3504	1672	f9496c106987b667046b3895dea478e6_JaffaCakes118.exe	sc.exe
PID 1672 wrote to memory of 3504	1672	f9496c106987b667046b3895dea478e6_JaffaCakes118.exe	sc.exe
PID 1672 wrote to memory of 3504	1672	f9496c106987b667046b3895dea478e6_JaffaCakes118.exe	sc.exe
PID 1672 wrote to memory of 1696	1672	f9496c106987b667046b3895dea478e6_JaffaCakes118.exe	netsh.exe
PID 1672 wrote to memory of 1696	1672	f9496c106987b667046b3895dea478e6_JaffaCakes118.exe	netsh.exe
PID 1672 wrote to memory of 1696	1672	f9496c106987b667046b3895dea478e6_JaffaCakes118.exe	netsh.exe
PID 676 wrote to memory of 4296	676	rrkxjgfh.exe	svchost.exe
PID 676 wrote to memory of 4296	676	rrkxjgfh.exe	svchost.exe
PID 676 wrote to memory of 4296	676	rrkxjgfh.exe	svchost.exe
PID 676 wrote to memory of 4296	676	rrkxjgfh.exe	svchost.exe
PID 676 wrote to memory of 4296	676	rrkxjgfh.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\f9496c106987b667046b3895dea478e6_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f9496c106987b667046b3895dea478e6_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1672

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\yhvivwpp\
2⤵
PID:4956

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rrkxjgfh.exe" C:\Windows\SysWOW64\yhvivwpp\
2⤵
PID:3780

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create yhvivwpp binPath= "C:\Windows\SysWOW64\yhvivwpp\rrkxjgfh.exe /d\"C:\Users\Admin\AppData\Local\Temp\f9496c106987b667046b3895dea478e6_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:728

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description yhvivwpp "wifi internet conection"
2⤵
- Launches sc.exe
PID:2560

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start yhvivwpp
2⤵
- Launches sc.exe
PID:3504

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:1696

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1672 -s 1036
2⤵
- Program crash
PID:3536

C:\Windows\SysWOW64\yhvivwpp\rrkxjgfh.exe
C:\Windows\SysWOW64\yhvivwpp\rrkxjgfh.exe /d"C:\Users\Admin\AppData\Local\Temp\f9496c106987b667046b3895dea478e6_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:676

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
- Deletes itself
PID:4296

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 676 -s 248
2⤵
- Program crash
PID:1320

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 1672 -ip 1672
1⤵
PID:3880

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 492 -p 676 -ip 676
1⤵
PID:2396

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\rrkxjgfh.exe

Filesize
15.0MB

MD5
4fbfa6c247caee7b70e164aab6f48d54

SHA1
83385a790e9c65260098595386a4221c30b97014

SHA256
0c53f75e1e78267671a50b05df370b075b0aa9b2d802007e7676f1cedbccfb24

SHA512
4f07ff193ef3103e94b4af02b8f1c1a9625cb5bbf3357d768703c033b90ad04012812bf4f245d1d55286603cb3352db4482e4020bba874ade8f34a17946aec12

Download Submit
memory/676-10-0x00000000007E0000-0x00000000008E0000-memory.dmp

Filesize
1024KB

Download
memory/676-11-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/676-18-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/1672-4-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/1672-2-0x00000000021B0000-0x00000000021C3000-memory.dmp

Filesize
76KB

Download
memory/1672-8-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/1672-9-0x00000000021B0000-0x00000000021C3000-memory.dmp

Filesize
76KB

Download
memory/1672-1-0x0000000000590000-0x0000000000690000-memory.dmp

Filesize
1024KB

Download
memory/4296-12-0x0000000000480000-0x0000000000495000-memory.dmp

Filesize
84KB

Download
memory/4296-16-0x0000000000480000-0x0000000000495000-memory.dmp

Filesize
84KB

Download
memory/4296-17-0x0000000000480000-0x0000000000495000-memory.dmp

Filesize
84KB

Download
memory/4296-19-0x0000000000480000-0x0000000000495000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads