tofsee | b45ec3d6bc959bc7656fa4825e315d3ad564ec978b1ce173ff57b139f36ce333

General

Target

f5dc335c6eb083d57521aff14be3e7c6_JaffaCakes118.exe
Size

12.3MB
MD5

f5dc335c6eb083d57521aff14be3e7c6
SHA1

7b1002a0c0ef3916d930c1043c2f060971e27604
SHA256

b45ec3d6bc959bc7656fa4825e315d3ad564ec978b1ce173ff57b139f36ce333
SHA512

a88e7b4bf9a011c813816018cbaafd9e93a502a6370063b79782c6709637d8a7ddcc04f20f5b74e7d6e4f85f64b2bbfdb8222fd55e0914831736ba49f337c4d0
SSDEEP

24576:kgdy5yNM4444444444444444444444444444444444444444444444444444444L:

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

4692 netsh.exe

pid	process
4692	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\yxnxwznv\ImagePath = "C:\\Windows\\SysWOW64\\yxnxwznv\\gknjvebx.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:

f5dc335c6eb083d57521aff14be3e7c6_JaffaCakes118.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2288054676-1871194608-3559553667-1000\Control Panel\International\Geo\Nation	f5dc335c6eb083d57521aff14be3e7c6_JaffaCakes118.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

1348 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

gknjvebx.exe

pid process

1296 gknjvebx.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

gknjvebx.exe

description pid process target process

PID 1296 set thread context of 1348 1296 gknjvebx.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

1172 sc.exe
2708 sc.exe
3216 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

4260 3132 WerFault.exe f5dc335c6eb083d57521aff14be3e7c6_JaffaCakes118.exe
4492 1296 WerFault.exe gknjvebx.exe

pid	process
1348	svchost.exe

pid	process
1296	gknjvebx.exe

description	pid	process	target process
PID 1296 set thread context of 1348	1296	gknjvebx.exe	svchost.exe

pid	process
1172	sc.exe
2708	sc.exe
3216	sc.exe

pid	pid_target	process	target process
4260	3132	WerFault.exe	f5dc335c6eb083d57521aff14be3e7c6_JaffaCakes118.exe
4492	1296	WerFault.exe	gknjvebx.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

f5dc335c6eb083d57521aff14be3e7c6_JaffaCakes118.exegknjvebx.exe

description	pid	process	target process
PID 3132 wrote to memory of 4732	3132	f5dc335c6eb083d57521aff14be3e7c6_JaffaCakes118.exe	cmd.exe
PID 3132 wrote to memory of 4732	3132	f5dc335c6eb083d57521aff14be3e7c6_JaffaCakes118.exe	cmd.exe
PID 3132 wrote to memory of 4732	3132	f5dc335c6eb083d57521aff14be3e7c6_JaffaCakes118.exe	cmd.exe
PID 3132 wrote to memory of 4716	3132	f5dc335c6eb083d57521aff14be3e7c6_JaffaCakes118.exe	cmd.exe
PID 3132 wrote to memory of 4716	3132	f5dc335c6eb083d57521aff14be3e7c6_JaffaCakes118.exe	cmd.exe
PID 3132 wrote to memory of 4716	3132	f5dc335c6eb083d57521aff14be3e7c6_JaffaCakes118.exe	cmd.exe
PID 3132 wrote to memory of 1172	3132	f5dc335c6eb083d57521aff14be3e7c6_JaffaCakes118.exe	sc.exe
PID 3132 wrote to memory of 1172	3132	f5dc335c6eb083d57521aff14be3e7c6_JaffaCakes118.exe	sc.exe
PID 3132 wrote to memory of 1172	3132	f5dc335c6eb083d57521aff14be3e7c6_JaffaCakes118.exe	sc.exe
PID 3132 wrote to memory of 2708	3132	f5dc335c6eb083d57521aff14be3e7c6_JaffaCakes118.exe	sc.exe
PID 3132 wrote to memory of 2708	3132	f5dc335c6eb083d57521aff14be3e7c6_JaffaCakes118.exe	sc.exe
PID 3132 wrote to memory of 2708	3132	f5dc335c6eb083d57521aff14be3e7c6_JaffaCakes118.exe	sc.exe
PID 3132 wrote to memory of 3216	3132	f5dc335c6eb083d57521aff14be3e7c6_JaffaCakes118.exe	sc.exe
PID 3132 wrote to memory of 3216	3132	f5dc335c6eb083d57521aff14be3e7c6_JaffaCakes118.exe	sc.exe
PID 3132 wrote to memory of 3216	3132	f5dc335c6eb083d57521aff14be3e7c6_JaffaCakes118.exe	sc.exe
PID 3132 wrote to memory of 4692	3132	f5dc335c6eb083d57521aff14be3e7c6_JaffaCakes118.exe	netsh.exe
PID 3132 wrote to memory of 4692	3132	f5dc335c6eb083d57521aff14be3e7c6_JaffaCakes118.exe	netsh.exe
PID 3132 wrote to memory of 4692	3132	f5dc335c6eb083d57521aff14be3e7c6_JaffaCakes118.exe	netsh.exe
PID 1296 wrote to memory of 1348	1296	gknjvebx.exe	svchost.exe
PID 1296 wrote to memory of 1348	1296	gknjvebx.exe	svchost.exe
PID 1296 wrote to memory of 1348	1296	gknjvebx.exe	svchost.exe
PID 1296 wrote to memory of 1348	1296	gknjvebx.exe	svchost.exe
PID 1296 wrote to memory of 1348	1296	gknjvebx.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\f5dc335c6eb083d57521aff14be3e7c6_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f5dc335c6eb083d57521aff14be3e7c6_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3132

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\yxnxwznv\
2⤵
PID:4732

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gknjvebx.exe" C:\Windows\SysWOW64\yxnxwznv\
2⤵
PID:4716

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create yxnxwznv binPath= "C:\Windows\SysWOW64\yxnxwznv\gknjvebx.exe /d\"C:\Users\Admin\AppData\Local\Temp\f5dc335c6eb083d57521aff14be3e7c6_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:1172

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description yxnxwznv "wifi internet conection"
2⤵
- Launches sc.exe
PID:2708

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start yxnxwznv
2⤵
- Launches sc.exe
PID:3216

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:4692

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3132 -s 1212
2⤵
- Program crash
PID:4260

C:\Windows\SysWOW64\yxnxwznv\gknjvebx.exe
C:\Windows\SysWOW64\yxnxwznv\gknjvebx.exe /d"C:\Users\Admin\AppData\Local\Temp\f5dc335c6eb083d57521aff14be3e7c6_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1296

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
- Deletes itself
PID:1348

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1296 -s 516
2⤵
- Program crash
PID:4492

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 3132 -ip 3132
1⤵
PID:4620

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 1296 -ip 1296
1⤵
PID:4820

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\gknjvebx.exe
Filesize
11.9MB

MD5
03a89ba2c406fa77df7d69b272c61e64

SHA1
059f965ad5651c5ffacd8ec1628cfe2938679bcf

SHA256
fb27e9ed9c3404d7e40c916b8ca7de5f628093e85d4ca60d19538bad9ecce4c4

SHA512
cdc568cfce3194970b6efb8426a87ebc60a7ba92fd6f5b8e2198ee38bc37a768f101023bf3a81389c52ad3dbe72791446896fc00edabefd2f7d715b840a15a87

Download Submit
memory/1296-10-0x0000000000520000-0x0000000000620000-memory.dmp

Filesize
1024KB

Download
memory/1296-11-0x0000000000400000-0x0000000000456000-memory.dmp

Filesize
344KB

Download
memory/1296-17-0x0000000000400000-0x0000000000456000-memory.dmp

Filesize
344KB

Download
memory/1348-12-0x0000000000540000-0x0000000000555000-memory.dmp

Filesize
84KB

Download
memory/1348-15-0x0000000000540000-0x0000000000555000-memory.dmp

Filesize
84KB

Download
memory/1348-16-0x0000000000540000-0x0000000000555000-memory.dmp

Filesize
84KB

Download
memory/1348-18-0x0000000000540000-0x0000000000555000-memory.dmp

Filesize
84KB

Download
memory/3132-4-0x0000000000400000-0x0000000000456000-memory.dmp

Filesize
344KB

Download
memory/3132-2-0x0000000000600000-0x0000000000613000-memory.dmp

Filesize
76KB

Download
memory/3132-8-0x0000000000400000-0x0000000000456000-memory.dmp

Filesize
344KB

Download
memory/3132-9-0x0000000000600000-0x0000000000613000-memory.dmp

Filesize
76KB

Download
memory/3132-1-0x0000000000640000-0x0000000000740000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads