Malware Analysis Report

2024-08-06 10:58

Sample ID 240518-cc95ssfa4v
Target perl530.dll.exe
SHA256 d44560fcedcb1d69fefddc0ce0b3b8109e1598e2b415e292b76e8fd7700724e6
Tags
cobaltstrike 100000 backdoor trojan
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

d44560fcedcb1d69fefddc0ce0b3b8109e1598e2b415e292b76e8fd7700724e6

Threat Level: Known bad

The file perl530.dll.exe was found to be: Known bad.

Malicious Activity Summary

cobaltstrike 100000 backdoor trojan

Cobaltstrike

Blocklisted process makes network request

Unsigned PE

MITRE ATT&CK Matrix

N/A

Analysis: static1

Detonation Overview

Reported

2024-05-18 01:57

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-18 01:57

Reported

2024-05-18 02:00

Platform

win7-20240221-en

Max time kernel

142s

Max time network

149s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\perl530.dll,#1

Signatures

Cobaltstrike

trojan backdoor cobaltstrike

Blocklisted process makes network request

Description Indicator Process Target
N/A N/A C:\Windows\system32\rundll32.exe N/A
N/A N/A C:\Windows\system32\rundll32.exe N/A
N/A N/A C:\Windows\system32\rundll32.exe N/A
N/A N/A C:\Windows\system32\rundll32.exe N/A
N/A N/A C:\Windows\system32\rundll32.exe N/A
N/A N/A C:\Windows\system32\rundll32.exe N/A
N/A N/A C:\Windows\system32\rundll32.exe N/A

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\perl530.dll,#1

Network

Country Destination Domain Proto
CN 120.26.36.197:443 tcp
CN 120.26.36.197:443 tcp
CN 120.26.36.197:443 tcp
CN 120.26.36.197:443 tcp
CN 120.26.36.197:443 tcp
CN 120.26.36.197:443 tcp
CN 120.26.36.197:443 tcp

Files

memory/2676-1-0x00000000002C0000-0x000000000030F000-memory.dmp

memory/2676-0-0x00000000020E0000-0x00000000030E0000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-18 01:57

Reported

2024-05-18 02:00

Platform

win10v2004-20240226-en

Max time kernel

147s

Max time network

162s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\perl530.dll,#1

Signatures

Cobaltstrike

trojan backdoor cobaltstrike

Blocklisted process makes network request

Description Indicator Process Target
N/A N/A C:\Windows\system32\rundll32.exe N/A
N/A N/A C:\Windows\system32\rundll32.exe N/A
N/A N/A C:\Windows\system32\rundll32.exe N/A
N/A N/A C:\Windows\system32\rundll32.exe N/A
N/A N/A C:\Windows\system32\rundll32.exe N/A
N/A N/A C:\Windows\system32\rundll32.exe N/A
N/A N/A C:\Windows\system32\rundll32.exe N/A

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\perl530.dll,#1

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4240 --field-trial-handle=2692,i,8678872182442199182,12502579059484928042,262144 --variations-seed-version /prefetch:8

Network

Country Destination Domain Proto
CN 120.26.36.197:443 tcp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 133.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
CN 120.26.36.197:443 tcp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
CN 120.26.36.197:443 tcp
US 8.8.8.8:53 chromewebstore.googleapis.com udp
US 8.8.8.8:53 chromewebstore.googleapis.com udp
GB 172.217.169.74:443 chromewebstore.googleapis.com tcp
US 8.8.8.8:53 74.169.217.172.in-addr.arpa udp
US 8.8.8.8:53 77.190.18.2.in-addr.arpa udp
CN 120.26.36.197:443 tcp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
CN 120.26.36.197:443 tcp
CN 120.26.36.197:443 tcp
US 8.8.8.8:53 104.246.116.51.in-addr.arpa udp
CN 120.26.36.197:443 tcp

Files

memory/4964-1-0x000002094D030000-0x000002094D07F000-memory.dmp

memory/4964-0-0x000002094D0D0000-0x000002094E0D0000-memory.dmp