tofsee | 2c82e9c61a9213ce1a25357b667d6929772bc8ad4324db38e8dd7f00c00eacc6

General

Target

pukix.exe
Size

1.0MB
MD5

7c93e4041e21ef8e4d45f7343abcae94
SHA1

146bc0e573b4dca3f38c147477e6c7fcabe536b3
SHA256

2c82e9c61a9213ce1a25357b667d6929772bc8ad4324db38e8dd7f00c00eacc6
SHA512

75903fabcf9c645f5caad2494c677d8e7e3c7a1d8a39e400fa8aea685d32e3253f0ce0423af4dba99a7e5a054b69ef48b5475d814de539574b2192794fcfedda
SSDEEP

24576:ykMXdjSpUjdjKIDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDr:yBXhSq1PDDDDDDDDDDDDDDDDDDDDDDD7

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

Windows security bypass 2 TTPs 1 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\yeezwepu = "0"	svchost.exe

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

4704 netsh.exe

pid	process
4704	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\yeezwepu\ImagePath = "C:\\Windows\\SysWOW64\\yeezwepu\\oxrwonie.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

4568 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

oxrwonie.exe

pid process

4112 oxrwonie.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

oxrwonie.exe

description pid process target process

PID 4112 set thread context of 4568 4112 oxrwonie.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

960 sc.exe
3492 sc.exe
4160 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
4568	svchost.exe

pid	process
4112	oxrwonie.exe

description	pid	process	target process
PID 4112 set thread context of 4568	4112	oxrwonie.exe	svchost.exe

pid	process
960	sc.exe
3492	sc.exe
4160	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

pukix.exeoxrwonie.exe

description	pid	process	target process
PID 1612 wrote to memory of 2936	1612	pukix.exe	cmd.exe
PID 1612 wrote to memory of 2936	1612	pukix.exe	cmd.exe
PID 1612 wrote to memory of 2936	1612	pukix.exe	cmd.exe
PID 1612 wrote to memory of 1472	1612	pukix.exe	cmd.exe
PID 1612 wrote to memory of 1472	1612	pukix.exe	cmd.exe
PID 1612 wrote to memory of 1472	1612	pukix.exe	cmd.exe
PID 1612 wrote to memory of 4160	1612	pukix.exe	sc.exe
PID 1612 wrote to memory of 4160	1612	pukix.exe	sc.exe
PID 1612 wrote to memory of 4160	1612	pukix.exe	sc.exe
PID 1612 wrote to memory of 960	1612	pukix.exe	sc.exe
PID 1612 wrote to memory of 960	1612	pukix.exe	sc.exe
PID 1612 wrote to memory of 960	1612	pukix.exe	sc.exe
PID 1612 wrote to memory of 3492	1612	pukix.exe	sc.exe
PID 1612 wrote to memory of 3492	1612	pukix.exe	sc.exe
PID 1612 wrote to memory of 3492	1612	pukix.exe	sc.exe
PID 1612 wrote to memory of 4704	1612	pukix.exe	netsh.exe
PID 1612 wrote to memory of 4704	1612	pukix.exe	netsh.exe
PID 1612 wrote to memory of 4704	1612	pukix.exe	netsh.exe
PID 4112 wrote to memory of 4568	4112	oxrwonie.exe	svchost.exe
PID 4112 wrote to memory of 4568	4112	oxrwonie.exe	svchost.exe
PID 4112 wrote to memory of 4568	4112	oxrwonie.exe	svchost.exe
PID 4112 wrote to memory of 4568	4112	oxrwonie.exe	svchost.exe
PID 4112 wrote to memory of 4568	4112	oxrwonie.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\pukix.exe
"C:\Users\Admin\AppData\Local\Temp\pukix.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1612

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\yeezwepu\
2⤵
PID:2936

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\oxrwonie.exe" C:\Windows\SysWOW64\yeezwepu\
2⤵
PID:1472

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create yeezwepu binPath= "C:\Windows\SysWOW64\yeezwepu\oxrwonie.exe /d\"C:\Users\Admin\AppData\Local\Temp\pukix.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:4160

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description yeezwepu "wifi internet conection"
2⤵
- Launches sc.exe
PID:960

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start yeezwepu
2⤵
- Launches sc.exe
PID:3492

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:4704

C:\Windows\SysWOW64\yeezwepu\oxrwonie.exe
C:\Windows\SysWOW64\yeezwepu\oxrwonie.exe /d"C:\Users\Admin\AppData\Local\Temp\pukix.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4112

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Windows security bypass
- Sets service image path in registry
- Deletes itself
PID:4568

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

2

T1562

Disable or Modify Tools

1

T1562.001

Disable or Modify System Firewall

Modify Registry

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\oxrwonie.exe
Filesize
13.2MB

MD5
8c05b1cc06671e81fa626df8589fc530

SHA1
a42407db82fe691ac9d8bdb3e34ddc6813391ca6

SHA256
3798d1b47a1556fa4e55f9ecf6bc26e4816d638af52ab1157b853cdbb2695a50

SHA512
a8b120fb005be8616b155c006563a682acefde3ce70b512cb5729af7fe6052615927d2cef7e057ab1a54fcaf9b8631547455a4b7a2c18795e629e001e5c85c59

Download Submit
memory/1612-12-0x0000000000400000-0x000000000046C000-memory.dmp

Filesize
432KB

Download
memory/1612-1-0x00000000005B0000-0x00000000006B0000-memory.dmp

Filesize
1024KB

Download
memory/1612-2-0x0000000002050000-0x0000000002063000-memory.dmp

Filesize
76KB

Download
memory/1612-4-0x0000000000400000-0x000000000046C000-memory.dmp

Filesize
432KB

Download
memory/4112-10-0x0000000000400000-0x000000000046C000-memory.dmp

Filesize
432KB

Download
memory/4112-9-0x00000000006C0000-0x00000000006D3000-memory.dmp

Filesize
76KB

Download
memory/4112-8-0x0000000000750000-0x0000000000850000-memory.dmp

Filesize
1024KB

Download
memory/4112-15-0x0000000000400000-0x000000000046C000-memory.dmp

Filesize
432KB

Download
memory/4568-11-0x0000000003000000-0x0000000003015000-memory.dmp

Filesize
84KB

Download
memory/4568-17-0x0000000003000000-0x0000000003015000-memory.dmp

Filesize
84KB

Download
memory/4568-18-0x0000000003000000-0x0000000003015000-memory.dmp

Filesize
84KB

Download
memory/4568-19-0x0000000003000000-0x0000000003015000-memory.dmp

Filesize
84KB

Download
memory/4568-20-0x0000000003000000-0x0000000003015000-memory.dmp

Filesize
84KB

Download
memory/4568-21-0x0000000003000000-0x0000000003015000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads