Malware Analysis Report

2025-05-28 17:31

Sample ID 230406-24xffshe6v
Target 5e7c5855de0bd2fac2f300b4ee1125dd57f9a6f06f58b4b7baf8f0a090a25ab8.bin.sample.gz
SHA256 9126a7738c6f66837060a1fa9fcb1b184b57a0609a8b79d573eaf2f968681f3d
Tags
mosaicloader loader
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

9126a7738c6f66837060a1fa9fcb1b184b57a0609a8b79d573eaf2f968681f3d

Threat Level: Known bad

The file 5e7c5855de0bd2fac2f300b4ee1125dd57f9a6f06f58b4b7baf8f0a090a25ab8.bin.sample.gz was found to be: Known bad.

Malicious Activity Summary

mosaicloader loader

MosaicLoader

Detects MosaicLoader payload

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2023-04-06 23:08

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-04-06 23:08

Reported

2023-04-06 23:11

Platform

win7-20230220-en

Max time kernel

143s

Max time network

33s

Command Line

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

Signatures

Detects MosaicLoader payload

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

MosaicLoader

loader mosaicloader

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 608 wrote to memory of 688 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 608 wrote to memory of 688 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 608 wrote to memory of 688 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 608 wrote to memory of 688 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 608 wrote to memory of 688 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 608 wrote to memory of 688 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 608 wrote to memory of 688 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 608 wrote to memory of 688 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 608 wrote to memory of 688 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 608 wrote to memory of 688 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 608 wrote to memory of 688 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 608 wrote to memory of 688 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 608 wrote to memory of 688 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe

Processes

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

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

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 class.checkblanco.xyz udp
N/A 127.0.0.1:49167 tcp
N/A 127.0.0.1:49169 tcp

Files

memory/608-54-0x0000000000220000-0x000000000029B000-memory.dmp

memory/608-55-0x0000000000400000-0x000000000088B000-memory.dmp

memory/608-57-0x0000000000220000-0x000000000029B000-memory.dmp

memory/688-56-0x0000000000400000-0x00000000004B7000-memory.dmp

memory/608-58-0x0000000000890000-0x0000000000A10000-memory.dmp

memory/688-59-0x0000000000400000-0x00000000004B7000-memory.dmp

memory/688-60-0x0000000000400000-0x00000000004B7000-memory.dmp

memory/688-61-0x0000000000400000-0x00000000004B7000-memory.dmp

memory/688-62-0x00000000001B0000-0x00000000001B1000-memory.dmp

memory/688-63-0x0000000000400000-0x00000000004B7000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-04-06 23:08

Reported

2023-04-06 23:11

Platform

win10v2004-20230220-en

Max time kernel

147s

Max time network

128s

Command Line

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

Signatures

Detects MosaicLoader payload

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

MosaicLoader

loader mosaicloader

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sample.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3712 wrote to memory of 116 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 3712 wrote to memory of 116 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 3712 wrote to memory of 116 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 3712 wrote to memory of 116 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 3712 wrote to memory of 116 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 3712 wrote to memory of 116 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 3712 wrote to memory of 116 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 3712 wrote to memory of 116 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 3712 wrote to memory of 116 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 3712 wrote to memory of 116 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 3712 wrote to memory of 116 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 3712 wrote to memory of 116 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe

Processes

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

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

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 class.checkblanco.xyz udp
N/A 127.0.0.1:49747 tcp
N/A 127.0.0.1:49749 tcp
US 13.89.179.8:443 tcp
IE 20.54.89.15:443 tcp
US 117.18.232.240:80 tcp
US 117.18.232.240:80 tcp
NL 173.223.113.164:443 tcp
NL 173.223.113.131:80 tcp
US 204.79.197.203:80 tcp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 44.8.109.52.in-addr.arpa udp
US 8.8.8.8:53 2.36.159.162.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 176.122.125.40.in-addr.arpa udp
US 209.197.3.8:80 tcp

Files

memory/3712-133-0x00000000025E0000-0x000000000265B000-memory.dmp

memory/3712-135-0x0000000000400000-0x000000000088B000-memory.dmp

memory/116-134-0x0000000000400000-0x00000000004B7000-memory.dmp

memory/116-138-0x0000000000400000-0x00000000004B7000-memory.dmp

memory/3712-139-0x0000000002680000-0x0000000002823000-memory.dmp

memory/3712-137-0x00000000025E0000-0x000000000265B000-memory.dmp

memory/116-140-0x0000000000400000-0x00000000004B7000-memory.dmp

memory/116-141-0x00000000001C0000-0x00000000001C1000-memory.dmp

memory/116-142-0x0000000000400000-0x00000000004B7000-memory.dmp

memory/116-143-0x0000000000400000-0x00000000004B7000-memory.dmp

memory/116-144-0x0000000000400000-0x00000000004B7000-memory.dmp