Malware Analysis Report

2024-09-11 09:25

Sample ID 240526-b7l6saae2w
Target backdoor.exe
SHA256 2b10f66d9a5a6e56e89b939b3606ebb628035a96ea64fc45f792ecc59b30d286
Tags
discordrat persistence rat rootkit stealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

2b10f66d9a5a6e56e89b939b3606ebb628035a96ea64fc45f792ecc59b30d286

Threat Level: Known bad

The file backdoor.exe was found to be: Known bad.

Malicious Activity Summary

discordrat persistence rat rootkit stealer

Discordrat family

Discord RAT

Legitimate hosting services abused for malware hosting/C2

Unsigned PE

Uses Task Scheduler COM API

Suspicious use of WriteProcessMemory

Creates scheduled task(s)

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Scheduled Task/Job
T1053
Persistence
TA0003
Scheduled Task/Job
T1053
Privilege Escalation
TA0004
Scheduled Task/Job
T1053
Defense Evasion
TA0005
Credential Access
TA0006
Discovery
TA0007
Query Registry
T1012
Lateral Movement
TA0008
Collection
TA0009
Exfiltration
TA0010
Command and Control
TA0011
Web Service
T1102
Impact
TA0040
Resource Development
TA0042
Reconnaissance
TA0043

Analysis: static1

Detonation Overview

Reported

2024-05-26 01:47

Signatures

Discordrat family

discordrat

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-26 01:47

Reported

2024-05-26 01:49

Platform

win7-20231129-en

Max time kernel

145s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\backdoor.exe"

Signatures

Discord RAT

stealer rootkit rat persistence discordrat

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2364 wrote to memory of 804 N/A C:\Users\Admin\AppData\Local\Temp\backdoor.exe C:\Windows\system32\WerFault.exe
PID 2364 wrote to memory of 804 N/A C:\Users\Admin\AppData\Local\Temp\backdoor.exe C:\Windows\system32\WerFault.exe
PID 2364 wrote to memory of 804 N/A C:\Users\Admin\AppData\Local\Temp\backdoor.exe C:\Windows\system32\WerFault.exe

Processes

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

"C:\Users\Admin\AppData\Local\Temp\backdoor.exe"

C:\Windows\system32\WerFault.exe

C:\Windows\system32\WerFault.exe -u -p 2364 -s 596

C:\Windows\explorer.exe

"C:\Windows\explorer.exe"

C:\Windows\explorer.exe

"C:\Windows\explorer.exe"

Network

N/A

Files

memory/2364-0-0x000007FEF5C93000-0x000007FEF5C94000-memory.dmp

memory/2364-1-0x000000013F750000-0x000000013F768000-memory.dmp

memory/2364-2-0x000007FEF5C90000-0x000007FEF667C000-memory.dmp

memory/2364-3-0x000007FEF5C90000-0x000007FEF667C000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-26 01:47

Reported

2024-05-26 01:49

Platform

win10v2004-20240426-en

Max time kernel

122s

Max time network

135s

Command Line

"C:\Users\Admin\AppData\Local\Temp\backdoor.exe"

Signatures

Discord RAT

stealer rootkit rat persistence discordrat

Legitimate hosting services abused for malware hosting/C2

Description Indicator Process Target
N/A discord.com N/A N/A
N/A discord.com N/A N/A
N/A discord.com N/A N/A
N/A discord.com N/A N/A
N/A discord.com N/A N/A
N/A discord.com N/A N/A
N/A discord.com N/A N/A
N/A discord.com N/A N/A
N/A discord.com N/A N/A

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\SYSTEM32\SCHTASKS.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\backdoor.exe N/A
Token: 33 N/A C:\Windows\system32\AUDIODG.EXE N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\system32\AUDIODG.EXE N/A
Token: SeShutdownPrivilege N/A C:\Users\Admin\AppData\Local\Temp\backdoor.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1948 wrote to memory of 3564 N/A C:\Users\Admin\AppData\Local\Temp\backdoor.exe C:\Windows\SYSTEM32\SCHTASKS.exe
PID 1948 wrote to memory of 3564 N/A C:\Users\Admin\AppData\Local\Temp\backdoor.exe C:\Windows\SYSTEM32\SCHTASKS.exe

Uses Task Scheduler COM API

persistence

Processes

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

"C:\Users\Admin\AppData\Local\Temp\backdoor.exe"

C:\Windows\SYSTEM32\SCHTASKS.exe

"SCHTASKS.exe" /create /tn "$77backdoor.exe" /tr "'C:\Users\Admin\AppData\Local\Temp\backdoor.exe'" /sc onlogon /rl HIGHEST

C:\Windows\System32\rundll32.exe

C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding

C:\Windows\system32\AUDIODG.EXE

C:\Windows\system32\AUDIODG.EXE 0x49c 0x498

Network

Country Destination Domain Proto
US 8.8.8.8:53 gateway.discord.gg udp
US 162.159.135.234:443 gateway.discord.gg tcp
US 8.8.8.8:53 g.bing.com udp
US 8.8.8.8:53 discord.com udp
US 204.79.197.237:443 g.bing.com tcp
US 162.159.135.232:443 discord.com tcp
US 8.8.8.8:53 234.135.159.162.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 91.90.14.23.in-addr.arpa udp
US 8.8.8.8:53 232.135.159.162.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
NL 23.62.61.97:443 www.bing.com tcp
US 8.8.8.8:53 geolocation-db.com udp
DE 159.89.102.253:443 geolocation-db.com tcp
US 162.159.135.232:443 discord.com tcp
US 8.8.8.8:53 71.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 253.102.89.159.in-addr.arpa udp
US 8.8.8.8:53 97.61.62.23.in-addr.arpa udp
NL 23.62.61.97:443 www.bing.com tcp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 162.159.135.232:443 discord.com tcp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 162.159.135.232:443 discord.com tcp
US 162.159.135.232:443 discord.com tcp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 162.159.135.232:443 discord.com tcp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 162.159.135.232:443 discord.com tcp
US 162.159.135.232:443 discord.com tcp

Files

memory/1948-0-0x00007FFC70883000-0x00007FFC70885000-memory.dmp

memory/1948-1-0x000001A1894A0000-0x000001A1894B8000-memory.dmp

memory/1948-2-0x000001A1A3BA0000-0x000001A1A3D62000-memory.dmp

memory/1948-3-0x00007FFC70880000-0x00007FFC71341000-memory.dmp

memory/1948-4-0x000001A1A43A0000-0x000001A1A48C8000-memory.dmp

memory/1948-5-0x00007FFC70883000-0x00007FFC70885000-memory.dmp

memory/1948-6-0x00007FFC70880000-0x00007FFC71341000-memory.dmp

memory/1948-7-0x000001A1A3E70000-0x000001A1A3F1A000-memory.dmp

memory/1948-11-0x00007FFC70880000-0x00007FFC71341000-memory.dmp

memory/1948-12-0x00007FFC70880000-0x00007FFC71341000-memory.dmp