tofsee | 2f89d2275e7708b9b39b3e554217c81fc9f1312f4a85790450843b28b10fe1b0

General

Target

fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe
Size

11.5MB
MD5

fa4fd90bf7c41e6e04a4eb88dabd22cb
SHA1

0eb6d1e0b924dd203f0b8be3a54948a5cb2cb856
SHA256

2f89d2275e7708b9b39b3e554217c81fc9f1312f4a85790450843b28b10fe1b0
SHA512

18e7f39f472d1317500410a213af80a19ddbc29130cda482fc6ef26f7a4607089fc0a65dc551ba65b2b25dc4687a57ee5981fac9839c1715a9ce0259abec1fe1
SSDEEP

98304:svkoooooooooooooooooooooooooooooooooooooooooooooooooooooooooooow:

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

5024 netsh.exe

pid	process
5024	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\kbydjlza\ImagePath = "C:\\Windows\\SysWOW64\\kbydjlza\\dycukvxv.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:

fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3198953144-1466794930-246379610-1000\Control Panel\International\Geo\Nation	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

868 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

dycukvxv.exe

pid process

3728 dycukvxv.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

dycukvxv.exe

description pid process target process

PID 3728 set thread context of 868 3728 dycukvxv.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

4284 sc.exe
2092 sc.exe
920 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
868	svchost.exe

pid	process
3728	dycukvxv.exe

description	pid	process	target process
PID 3728 set thread context of 868	3728	dycukvxv.exe	svchost.exe

pid	process
4284	sc.exe
2092	sc.exe
920	sc.exe

Program crash 4 IoCs

Processes:

WerFault.exeWerFault.exeWerFault.exeWerFault.exe

pid	pid_target	process	target process
5112	3780	WerFault.exe	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe
1804	3780	WerFault.exe	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe
4972	3728	WerFault.exe	dycukvxv.exe
3000	3728	WerFault.exe	dycukvxv.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exedycukvxv.exe

description	pid	process	target process
PID 3780 wrote to memory of 2344	3780	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe	cmd.exe
PID 3780 wrote to memory of 2344	3780	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe	cmd.exe
PID 3780 wrote to memory of 2344	3780	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe	cmd.exe
PID 3780 wrote to memory of 3436	3780	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe	cmd.exe
PID 3780 wrote to memory of 3436	3780	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe	cmd.exe
PID 3780 wrote to memory of 3436	3780	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe	cmd.exe
PID 3780 wrote to memory of 4284	3780	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe	sc.exe
PID 3780 wrote to memory of 4284	3780	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe	sc.exe
PID 3780 wrote to memory of 4284	3780	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe	sc.exe
PID 3780 wrote to memory of 2092	3780	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe	sc.exe
PID 3780 wrote to memory of 2092	3780	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe	sc.exe
PID 3780 wrote to memory of 2092	3780	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe	sc.exe
PID 3780 wrote to memory of 920	3780	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe	sc.exe
PID 3780 wrote to memory of 920	3780	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe	sc.exe
PID 3780 wrote to memory of 920	3780	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe	sc.exe
PID 3780 wrote to memory of 5024	3780	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe	netsh.exe
PID 3780 wrote to memory of 5024	3780	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe	netsh.exe
PID 3780 wrote to memory of 5024	3780	fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe	netsh.exe
PID 3728 wrote to memory of 868	3728	dycukvxv.exe	svchost.exe
PID 3728 wrote to memory of 868	3728	dycukvxv.exe	svchost.exe
PID 3728 wrote to memory of 868	3728	dycukvxv.exe	svchost.exe
PID 3728 wrote to memory of 868	3728	dycukvxv.exe	svchost.exe
PID 3728 wrote to memory of 868	3728	dycukvxv.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3780

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kbydjlza\
2⤵
PID:2344

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\dycukvxv.exe" C:\Windows\SysWOW64\kbydjlza\
2⤵
PID:3436

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create kbydjlza binPath= "C:\Windows\SysWOW64\kbydjlza\dycukvxv.exe /d\"C:\Users\Admin\AppData\Local\Temp\fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:4284

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description kbydjlza "wifi internet conection"
2⤵
- Launches sc.exe
PID:2092

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start kbydjlza
2⤵
- Launches sc.exe
PID:920

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:5024

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3780 -s 1156
2⤵
- Program crash
PID:5112

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3780 -s 1044
2⤵
- Program crash
PID:1804

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 3780 -ip 3780
1⤵
PID:1700

C:\Windows\SysWOW64\kbydjlza\dycukvxv.exe
C:\Windows\SysWOW64\kbydjlza\dycukvxv.exe /d"C:\Users\Admin\AppData\Local\Temp\fa4fd90bf7c41e6e04a4eb88dabd22cb_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3728

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
- Deletes itself
PID:868

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3728 -s 540
2⤵
- Program crash
PID:4972

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3728 -s 520
2⤵
- Program crash
PID:3000

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 3780 -ip 3780
1⤵
PID:4148

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 504 -p 3728 -ip 3728
1⤵
PID:2704

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3728 -ip 3728
1⤵
PID:244

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\dycukvxv.exe

Filesize
14.2MB

MD5
a7a1ee7ef88ff2165639312d77513a59

SHA1
b7aec8245a5b5459ee25d7dc9b8ab0c26d153e94

SHA256
c5061d047c67d9e7c6ab00d1876e6f8c19d6e4683ab9bfd6c09618af1b590282

SHA512
d437955e770ec279227bc3eb00c42d8caaa07e4f13cd99a54d7492b168764fade00b0ffef5ea8f0494a9920994330793ab1fd997d088d6121783289e190ebf3c

Download Submit
memory/868-18-0x0000000001270000-0x0000000001285000-memory.dmp

Filesize
84KB

Download
memory/868-10-0x0000000001270000-0x0000000001285000-memory.dmp

Filesize
84KB

Download
memory/868-19-0x0000000001270000-0x0000000001285000-memory.dmp

Filesize
84KB

Download
memory/868-21-0x0000000001270000-0x0000000001285000-memory.dmp

Filesize
84KB

Download
memory/868-22-0x0000000001270000-0x0000000001285000-memory.dmp

Filesize
84KB

Download
memory/3728-11-0x00000000030C0000-0x00000000031C0000-memory.dmp

Filesize
1024KB

Download
memory/3728-13-0x0000000002FE0000-0x0000000002FF3000-memory.dmp

Filesize
76KB

Download
memory/3728-16-0x0000000000400000-0x0000000002FA6000-memory.dmp

Filesize
43.6MB

Download
memory/3728-20-0x0000000000400000-0x0000000002FA6000-memory.dmp

Filesize
43.6MB

Download
memory/3780-4-0x0000000000400000-0x0000000002FA6000-memory.dmp

Filesize
43.6MB

Download
memory/3780-2-0x0000000003130000-0x0000000003143000-memory.dmp

Filesize
76KB

Download
memory/3780-8-0x0000000000400000-0x0000000002FA6000-memory.dmp

Filesize
43.6MB

Download
memory/3780-1-0x0000000003300000-0x0000000003400000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads