Malware Analysis Report

2025-01-22 13:06

Sample ID 240724-n1tcqsvcnk
Target bf52ccc86b26d14f7804c49a65026df04b1dbb2e02c95ea3ef0b3611d0fb2c93
SHA256 bf52ccc86b26d14f7804c49a65026df04b1dbb2e02c95ea3ef0b3611d0fb2c93
Tags
cobaltstrike backdoor trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

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

bf52ccc86b26d14f7804c49a65026df04b1dbb2e02c95ea3ef0b3611d0fb2c93

Threat Level: Known bad

The file bf52ccc86b26d14f7804c49a65026df04b1dbb2e02c95ea3ef0b3611d0fb2c93 was found to be: Known bad.

Malicious Activity Summary

cobaltstrike backdoor trojan

Cobaltstrike family

Cobaltstrike

Blocklisted process makes network request

Suspicious use of SetThreadContext

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2024-07-24 11:52

Signatures

Cobaltstrike family

cobaltstrike

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-07-24 11:52

Reported

2024-07-24 11:54

Platform

win7-20240704-en

Max time kernel

148s

Max time network

154s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\bf52ccc86b26d14f7804c49a65026df04b1dbb2e02c95ea3ef0b3611d0fb2c93.dll,#1

Signatures

Cobaltstrike

trojan backdoor cobaltstrike

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1356 set thread context of 3060 N/A C:\Windows\system32\rundll32.exe C:\Windows\system32\rundll32.exe

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1356 wrote to memory of 3060 N/A C:\Windows\system32\rundll32.exe C:\Windows\system32\rundll32.exe
PID 1356 wrote to memory of 3060 N/A C:\Windows\system32\rundll32.exe C:\Windows\system32\rundll32.exe
PID 1356 wrote to memory of 3060 N/A C:\Windows\system32\rundll32.exe C:\Windows\system32\rundll32.exe
PID 1356 wrote to memory of 3060 N/A C:\Windows\system32\rundll32.exe C:\Windows\system32\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\bf52ccc86b26d14f7804c49a65026df04b1dbb2e02c95ea3ef0b3611d0fb2c93.dll,#1

C:\Windows\system32\rundll32.exe

rundll32.exe

Network

Country Destination Domain Proto
CN 124.70.34.71:2333 tcp
CN 124.70.34.71:2333 tcp
CN 124.70.34.71:2333 tcp
CN 124.70.34.71:2333 tcp
CN 124.70.34.71:2333 tcp
CN 124.70.34.71:2333 tcp
CN 124.70.34.71:2333 tcp
CN 124.70.34.71:2333 tcp

Files

memory/3060-0-0x0000000000060000-0x0000000000061000-memory.dmp

memory/3060-2-0x0000000000060000-0x0000000000061000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-07-24 11:52

Reported

2024-07-24 11:54

Platform

win10v2004-20240709-en

Max time kernel

147s

Max time network

149s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\bf52ccc86b26d14f7804c49a65026df04b1dbb2e02c95ea3ef0b3611d0fb2c93.dll,#1

Signatures

Cobaltstrike

trojan backdoor cobaltstrike

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 3580 set thread context of 3776 N/A C:\Windows\system32\rundll32.exe C:\Windows\system32\rundll32.exe

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3580 wrote to memory of 3776 N/A C:\Windows\system32\rundll32.exe C:\Windows\system32\rundll32.exe
PID 3580 wrote to memory of 3776 N/A C:\Windows\system32\rundll32.exe C:\Windows\system32\rundll32.exe
PID 3580 wrote to memory of 3776 N/A C:\Windows\system32\rundll32.exe C:\Windows\system32\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\bf52ccc86b26d14f7804c49a65026df04b1dbb2e02c95ea3ef0b3611d0fb2c93.dll,#1

C:\Windows\system32\rundll32.exe

rundll32.exe

Network

Country Destination Domain Proto
CN 124.70.34.71:2333 tcp
US 8.8.8.8:53 134.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 183.142.211.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
CN 124.70.34.71:2333 tcp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 107.12.20.2.in-addr.arpa udp
CN 124.70.34.71:2333 tcp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
CN 124.70.34.71:2333 tcp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
CN 124.70.34.71:2333 tcp
US 8.8.8.8:53 23.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
CN 124.70.34.71:2333 tcp
CN 124.70.34.71:2333 tcp
CN 124.70.34.71:2333 tcp

Files

memory/3776-0-0x000001E813480000-0x000001E813481000-memory.dmp