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\mmendqp = "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

2432 netsh.exe

pid	process
2432	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\mmendqp\ImagePath = "C:\\Windows\\SysWOW64\\mmendqp\\rtmxemaq.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

2876 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

rtmxemaq.exe

pid process

2548 rtmxemaq.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

rtmxemaq.exe

description pid process target process

PID 2548 set thread context of 2876 2548 rtmxemaq.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

2528 sc.exe
2640 sc.exe
2516 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2876	svchost.exe

pid	process
2548	rtmxemaq.exe

description	pid	process	target process
PID 2548 set thread context of 2876	2548	rtmxemaq.exe	svchost.exe

pid	process
2528	sc.exe
2640	sc.exe
2516	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

pukix.exertmxemaq.exe

description	pid	process	target process
PID 2564 wrote to memory of 2520	2564	pukix.exe	cmd.exe
PID 2564 wrote to memory of 2520	2564	pukix.exe	cmd.exe
PID 2564 wrote to memory of 2520	2564	pukix.exe	cmd.exe
PID 2564 wrote to memory of 2520	2564	pukix.exe	cmd.exe
PID 2564 wrote to memory of 2596	2564	pukix.exe	cmd.exe
PID 2564 wrote to memory of 2596	2564	pukix.exe	cmd.exe
PID 2564 wrote to memory of 2596	2564	pukix.exe	cmd.exe
PID 2564 wrote to memory of 2596	2564	pukix.exe	cmd.exe
PID 2564 wrote to memory of 2528	2564	pukix.exe	sc.exe
PID 2564 wrote to memory of 2528	2564	pukix.exe	sc.exe
PID 2564 wrote to memory of 2528	2564	pukix.exe	sc.exe
PID 2564 wrote to memory of 2528	2564	pukix.exe	sc.exe
PID 2564 wrote to memory of 2640	2564	pukix.exe	sc.exe
PID 2564 wrote to memory of 2640	2564	pukix.exe	sc.exe
PID 2564 wrote to memory of 2640	2564	pukix.exe	sc.exe
PID 2564 wrote to memory of 2640	2564	pukix.exe	sc.exe
PID 2564 wrote to memory of 2516	2564	pukix.exe	sc.exe
PID 2564 wrote to memory of 2516	2564	pukix.exe	sc.exe
PID 2564 wrote to memory of 2516	2564	pukix.exe	sc.exe
PID 2564 wrote to memory of 2516	2564	pukix.exe	sc.exe
PID 2564 wrote to memory of 2432	2564	pukix.exe	netsh.exe
PID 2564 wrote to memory of 2432	2564	pukix.exe	netsh.exe
PID 2564 wrote to memory of 2432	2564	pukix.exe	netsh.exe
PID 2564 wrote to memory of 2432	2564	pukix.exe	netsh.exe
PID 2548 wrote to memory of 2876	2548	rtmxemaq.exe	svchost.exe
PID 2548 wrote to memory of 2876	2548	rtmxemaq.exe	svchost.exe
PID 2548 wrote to memory of 2876	2548	rtmxemaq.exe	svchost.exe
PID 2548 wrote to memory of 2876	2548	rtmxemaq.exe	svchost.exe
PID 2548 wrote to memory of 2876	2548	rtmxemaq.exe	svchost.exe
PID 2548 wrote to memory of 2876	2548	rtmxemaq.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:2564

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\mmendqp\
2⤵
PID:2520

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rtmxemaq.exe" C:\Windows\SysWOW64\mmendqp\
2⤵
PID:2596

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create mmendqp binPath= "C:\Windows\SysWOW64\mmendqp\rtmxemaq.exe /d\"C:\Users\Admin\AppData\Local\Temp\pukix.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:2528

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description mmendqp "wifi internet conection"
2⤵
- Launches sc.exe
PID:2640

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start mmendqp
2⤵
- Launches sc.exe
PID:2516

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:2432

C:\Windows\SysWOW64\mmendqp\rtmxemaq.exe
C:\Windows\SysWOW64\mmendqp\rtmxemaq.exe /d"C:\Users\Admin\AppData\Local\Temp\pukix.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2548

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Windows security bypass
- Sets service image path in registry
- Deletes itself
PID:2876

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

2

T1562

Disable or Modify System Firewall

1

T1562.004

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\rtmxemaq.exe

Filesize
13.3MB

MD5
b8aab9e676b7fb1ddb9ddb81cf38af96

SHA1
ffa0db0a885341067679ab48b252903dc3ed881c

SHA256
88940f33a56e7567380122166da27cd937c83a45cf712d1999fcca5b52745d3d

SHA512
2468d4cc04ac05468268dac17e7dac71132f702ccfa7d1d128fc8b9fb19d53fb0594ceb5eedd3a23825d6d094fcfefa4bf1e5c2d671321076974f9d4e01972bc

Download Submit
memory/2548-10-0x00000000004E0000-0x00000000005E0000-memory.dmp

Filesize
1024KB

Download
memory/2548-18-0x0000000000400000-0x000000000046C000-memory.dmp

Filesize
432KB

Download
memory/2548-12-0x0000000000400000-0x000000000046C000-memory.dmp

Filesize
432KB

Download
memory/2564-7-0x0000000000400000-0x000000000046C000-memory.dmp

Filesize
432KB

Download
memory/2564-9-0x0000000000290000-0x0000000000390000-memory.dmp

Filesize
1024KB

Download
memory/2564-1-0x0000000000290000-0x0000000000390000-memory.dmp

Filesize
1024KB

Download
memory/2564-11-0x00000000001B0000-0x00000000001C3000-memory.dmp

Filesize
76KB

Download
memory/2564-3-0x0000000000400000-0x000000000046C000-memory.dmp

Filesize
432KB

Download
memory/2564-2-0x00000000001B0000-0x00000000001C3000-memory.dmp

Filesize
76KB

Download
memory/2876-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2876-13-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2876-16-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2876-20-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2876-21-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2876-22-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2876-23-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads