tofsee | cc405e27cf3c45f22534764ed6c2c3d7dc46264b4c275cfc53b3cf6707c211a5

General

Target

f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe
Size

10.1MB
MD5

f777ab88e7988a6197689c84bd5c200b
SHA1

9b8f94fe18fcfcbbb6ca1736751d6ca5ee417766
SHA256

cc405e27cf3c45f22534764ed6c2c3d7dc46264b4c275cfc53b3cf6707c211a5
SHA512

9e9730d5ee6629003f29dcd9193ccd09acfa52256439a8408019273fd12b5c87138de4459d659c63a7eb505cc81039a50767ca33adf687a389a40aeb6ba64436
SSDEEP

12288:Iz+wSUpBMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMs:Iz8

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

3996 netsh.exe

pid	process
3996	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\yfldoquq\ImagePath = "C:\\Windows\\SysWOW64\\yfldoquq\\vewvequl.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:

f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4092317236-2027488869-1227795436-1000\Control Panel\International\Geo\Nation	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

3992 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

vewvequl.exe

pid process

4924 vewvequl.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

vewvequl.exe

description pid process target process

PID 4924 set thread context of 3992 4924 vewvequl.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

4896 sc.exe
1812 sc.exe
4768 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
3992	svchost.exe

pid	process
4924	vewvequl.exe

description	pid	process	target process
PID 4924 set thread context of 3992	4924	vewvequl.exe	svchost.exe

pid	process
4896	sc.exe
1812	sc.exe
4768	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exevewvequl.exe

description	pid	process	target process
PID 4808 wrote to memory of 2128	4808	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe	cmd.exe
PID 4808 wrote to memory of 2128	4808	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe	cmd.exe
PID 4808 wrote to memory of 2128	4808	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe	cmd.exe
PID 4808 wrote to memory of 4560	4808	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe	cmd.exe
PID 4808 wrote to memory of 4560	4808	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe	cmd.exe
PID 4808 wrote to memory of 4560	4808	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe	cmd.exe
PID 4808 wrote to memory of 1812	4808	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe	sc.exe
PID 4808 wrote to memory of 1812	4808	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe	sc.exe
PID 4808 wrote to memory of 1812	4808	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe	sc.exe
PID 4808 wrote to memory of 4768	4808	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe	sc.exe
PID 4808 wrote to memory of 4768	4808	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe	sc.exe
PID 4808 wrote to memory of 4768	4808	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe	sc.exe
PID 4808 wrote to memory of 4896	4808	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe	sc.exe
PID 4808 wrote to memory of 4896	4808	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe	sc.exe
PID 4808 wrote to memory of 4896	4808	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe	sc.exe
PID 4808 wrote to memory of 3996	4808	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe	netsh.exe
PID 4808 wrote to memory of 3996	4808	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe	netsh.exe
PID 4808 wrote to memory of 3996	4808	f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe	netsh.exe
PID 4924 wrote to memory of 3992	4924	vewvequl.exe	svchost.exe
PID 4924 wrote to memory of 3992	4924	vewvequl.exe	svchost.exe
PID 4924 wrote to memory of 3992	4924	vewvequl.exe	svchost.exe
PID 4924 wrote to memory of 3992	4924	vewvequl.exe	svchost.exe
PID 4924 wrote to memory of 3992	4924	vewvequl.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4808

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\yfldoquq\
2⤵
PID:2128

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vewvequl.exe" C:\Windows\SysWOW64\yfldoquq\
2⤵
PID:4560

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create yfldoquq binPath= "C:\Windows\SysWOW64\yfldoquq\vewvequl.exe /d\"C:\Users\Admin\AppData\Local\Temp\f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:1812

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description yfldoquq "wifi internet conection"
2⤵
- Launches sc.exe
PID:4768

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start yfldoquq
2⤵
- Launches sc.exe
PID:4896

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:3996

C:\Windows\SysWOW64\yfldoquq\vewvequl.exe
C:\Windows\SysWOW64\yfldoquq\vewvequl.exe /d"C:\Users\Admin\AppData\Local\Temp\f777ab88e7988a6197689c84bd5c200b_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4924

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
- Deletes itself
PID:3992

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\vewvequl.exe
Filesize
14.9MB

MD5
86ccea191b283ba1923980c40b24e3d8

SHA1
9515dc33eab7c7c95c0310b6d692dc4726ce3eb8

SHA256
174c1117161ed764af6666350fdcea90f0eaa6a381387192a3d8a992d9babf2b

SHA512
e84b9b033ba1fc1a5e686f62f4dda0140f9c6d460ebe287082feea120aaca916cd82a85676524f01c7f9d31e37185bbecf48886c206ba7e8db30d3d8c5e4cb65

Download Submit
memory/3992-11-0x0000000000E20000-0x0000000000E35000-memory.dmp

Filesize
84KB

Download
memory/3992-18-0x0000000000E20000-0x0000000000E35000-memory.dmp

Filesize
84KB

Download
memory/3992-17-0x0000000000E20000-0x0000000000E35000-memory.dmp

Filesize
84KB

Download
memory/3992-16-0x0000000000E20000-0x0000000000E35000-memory.dmp

Filesize
84KB

Download
memory/4808-3-0x00000000005E0000-0x00000000005E1000-memory.dmp

Filesize
4KB

Download
memory/4808-7-0x000000005F000000-0x000000005F011000-memory.dmp

Filesize
68KB

Download
memory/4808-6-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/4808-0-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/4808-1-0x00000000005D0000-0x00000000005D1000-memory.dmp

Filesize
4KB

Download
memory/4808-2-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/4924-9-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/4924-10-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/4924-12-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads