tofsee | f8b2c110a680ee0fad4fc129351ad835fb959bc6ad5c99aa707aec7887affee9

General

Target

f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe
Size

12.0MB
MD5

f24e01b5427f0548a8b5fcb06a03d6cb
SHA1

c1225c08af8b71beeb8e934038ca10b8edcce686
SHA256

f8b2c110a680ee0fad4fc129351ad835fb959bc6ad5c99aa707aec7887affee9
SHA512

09d65fa5696a76932abdb0e5e647592a643baa3080205ce1d4eea58123e21d92776c002aba63c68fe1f1bc407963803e2913e5db11e5e80a909cc0ab139191a1
SSDEEP

24576:cT8rgnPp+RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRf:sp+

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.6

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

2040 netsh.exe

pid	process
2040	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\grmbbxyb\ImagePath = "C:\\Windows\\SysWOW64\\grmbbxyb\\vzgqerzp.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:

f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2177723727-746291240-1644359950-1000\Control Panel\International\Geo\Nation	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

4084 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

vzgqerzp.exe

pid process

2280 vzgqerzp.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

vzgqerzp.exe

description pid process target process

PID 2280 set thread context of 4084 2280 vzgqerzp.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

4832 sc.exe
3168 sc.exe
804 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
4084	svchost.exe

pid	process
2280	vzgqerzp.exe

description	pid	process	target process
PID 2280 set thread context of 4084	2280	vzgqerzp.exe	svchost.exe

pid	process
4832	sc.exe
3168	sc.exe
804	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exevzgqerzp.exe

description	pid	process	target process
PID 4796 wrote to memory of 3912	4796	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	cmd.exe
PID 4796 wrote to memory of 3912	4796	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	cmd.exe
PID 4796 wrote to memory of 3912	4796	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	cmd.exe
PID 4796 wrote to memory of 4472	4796	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	cmd.exe
PID 4796 wrote to memory of 4472	4796	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	cmd.exe
PID 4796 wrote to memory of 4472	4796	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	cmd.exe
PID 4796 wrote to memory of 4832	4796	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	sc.exe
PID 4796 wrote to memory of 4832	4796	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	sc.exe
PID 4796 wrote to memory of 4832	4796	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	sc.exe
PID 4796 wrote to memory of 3168	4796	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	sc.exe
PID 4796 wrote to memory of 3168	4796	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	sc.exe
PID 4796 wrote to memory of 3168	4796	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	sc.exe
PID 4796 wrote to memory of 804	4796	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	sc.exe
PID 4796 wrote to memory of 804	4796	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	sc.exe
PID 4796 wrote to memory of 804	4796	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	sc.exe
PID 4796 wrote to memory of 2040	4796	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	netsh.exe
PID 4796 wrote to memory of 2040	4796	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	netsh.exe
PID 4796 wrote to memory of 2040	4796	f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe	netsh.exe
PID 2280 wrote to memory of 4084	2280	vzgqerzp.exe	svchost.exe
PID 2280 wrote to memory of 4084	2280	vzgqerzp.exe	svchost.exe
PID 2280 wrote to memory of 4084	2280	vzgqerzp.exe	svchost.exe
PID 2280 wrote to memory of 4084	2280	vzgqerzp.exe	svchost.exe
PID 2280 wrote to memory of 4084	2280	vzgqerzp.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4796

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\grmbbxyb\
2⤵
PID:3912

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vzgqerzp.exe" C:\Windows\SysWOW64\grmbbxyb\
2⤵
PID:4472

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create grmbbxyb binPath= "C:\Windows\SysWOW64\grmbbxyb\vzgqerzp.exe /d\"C:\Users\Admin\AppData\Local\Temp\f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:4832

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description grmbbxyb "wifi internet conection"
2⤵
- Launches sc.exe
PID:3168

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start grmbbxyb
2⤵
- Launches sc.exe
PID:804

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:2040

C:\Windows\SysWOW64\grmbbxyb\vzgqerzp.exe
C:\Windows\SysWOW64\grmbbxyb\vzgqerzp.exe /d"C:\Users\Admin\AppData\Local\Temp\f24e01b5427f0548a8b5fcb06a03d6cb_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2280

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
- Deletes itself
PID:4084

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\vzgqerzp.exe

Filesize
14.8MB

MD5
35089220ecd1f34b808f856a091f1c13

SHA1
b2c200c81f9e9987238d1c867dbff34f0af35101

SHA256
fff16312237bdb87a36a151ee4ce6b8cdb28f28afaf4a9210d8cddacb14a8cf0

SHA512
81c13d6add678575cefee378335e4e694377f8c8712297433ca09e88cdad9af99805bb394a1a3a8e511ae0f75b63a1a7261a6dbf36ccb2a7088c69e1778a15ae

Download Submit
memory/2280-14-0x0000000000400000-0x00000000008EE000-memory.dmp

Filesize
4.9MB

Download
memory/2280-11-0x0000000000AC0000-0x0000000000BC0000-memory.dmp

Filesize
1024KB

Download
memory/2280-13-0x0000000000400000-0x00000000008EE000-memory.dmp

Filesize
4.9MB

Download
memory/4084-10-0x0000000000F00000-0x0000000000F15000-memory.dmp

Filesize
84KB

Download
memory/4084-17-0x0000000000F00000-0x0000000000F15000-memory.dmp

Filesize
84KB

Download
memory/4084-18-0x0000000000F00000-0x0000000000F15000-memory.dmp

Filesize
84KB

Download
memory/4084-19-0x0000000000F00000-0x0000000000F15000-memory.dmp

Filesize
84KB

Download
memory/4796-4-0x0000000000400000-0x00000000008EE000-memory.dmp

Filesize
4.9MB

Download
memory/4796-2-0x0000000000A90000-0x0000000000AA3000-memory.dmp

Filesize
76KB

Download
memory/4796-7-0x0000000000400000-0x00000000008EE000-memory.dmp

Filesize
4.9MB

Download
memory/4796-8-0x0000000000A90000-0x0000000000AA3000-memory.dmp

Filesize
76KB

Download
memory/4796-1-0x0000000000AE0000-0x0000000000BE0000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads