Malware Analysis Report

2025-05-28 17:31

Sample ID 230406-25l14she6x
Target 50a4fbbf71d27bfffb438d40976030f4b1445cb446300ede262f276fb5527b00.bin.sample.gz
SHA256 5d0597862de02a1bc417d127b0160e32d4558f790d6f4f1d9eb3eb7a36e6ca83
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

5d0597862de02a1bc417d127b0160e32d4558f790d6f4f1d9eb3eb7a36e6ca83

Threat Level: Known bad

The file 50a4fbbf71d27bfffb438d40976030f4b1445cb446300ede262f276fb5527b00.bin.sample.gz was found to be: Known bad.

Malicious Activity Summary

mosaicloader loader

Detects MosaicLoader payload

MosaicLoader

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

Suspicious use of UnmapMainImage

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2023-04-06 23:09

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-04-06 23:09

Reported

2023-04-06 23:12

Platform

win7-20230220-en

Max time kernel

141s

Max time network

30s

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 use of WriteProcessMemory

Description Indicator Process Target
PID 1340 wrote to memory of 1772 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 1340 wrote to memory of 1772 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 1340 wrote to memory of 1772 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 1340 wrote to memory of 1772 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 1340 wrote to memory of 1772 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 1340 wrote to memory of 1772 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 1340 wrote to memory of 1772 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 1340 wrote to memory of 1772 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 1340 wrote to memory of 1772 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 1340 wrote to memory of 1772 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 1340 wrote to memory of 1772 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 1340 wrote to memory of 1772 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 1340 wrote to memory of 1772 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 t1.xofinity.com udp
CN 182.61.201.91:80 t1.xofinity.com tcp
N/A 127.0.0.1:49166 tcp
N/A 127.0.0.1:49168 tcp

Files

memory/1772-55-0x0000000000400000-0x00000000004B7000-memory.dmp

memory/1340-54-0x0000000000400000-0x0000000000B18000-memory.dmp

memory/1340-56-0x0000000000220000-0x000000000029B000-memory.dmp

memory/1772-57-0x0000000000400000-0x00000000004B7000-memory.dmp

memory/1340-58-0x0000000002590000-0x0000000002710000-memory.dmp

memory/1772-59-0x0000000000400000-0x00000000004B7000-memory.dmp

memory/1772-60-0x0000000000400000-0x00000000004B7000-memory.dmp

memory/1772-61-0x00000000001B0000-0x00000000001B1000-memory.dmp

memory/1772-62-0x0000000000400000-0x00000000004B7000-memory.dmp

memory/1772-63-0x0000000000400000-0x00000000004B7000-memory.dmp

memory/1340-64-0x0000000002590000-0x0000000002710000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-04-06 23:09

Reported

2023-04-06 23:12

Platform

win10v2004-20230221-en

Max time kernel

92s

Max time network

154s

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 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 UnmapMainImage

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4824 wrote to memory of 1932 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 4824 wrote to memory of 1932 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 4824 wrote to memory of 1932 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 4824 wrote to memory of 1932 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 4824 wrote to memory of 1932 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 4824 wrote to memory of 1932 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 4824 wrote to memory of 1932 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 4824 wrote to memory of 1932 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 4824 wrote to memory of 1932 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 4824 wrote to memory of 1932 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 4824 wrote to memory of 1932 N/A C:\Users\Admin\AppData\Local\Temp\sample.exe C:\Users\Admin\AppData\Local\Temp\sample.exe
PID 4824 wrote to memory of 1932 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 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 33.18.126.40.in-addr.arpa udp
US 8.8.8.8:53 t1.xofinity.com udp
CN 182.61.201.90:80 t1.xofinity.com tcp
N/A 127.0.0.1:49723 tcp
N/A 127.0.0.1:49725 tcp
US 8.8.8.8:53 90.201.61.182.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 5.233.140.95.in-addr.arpa udp
US 8.8.8.8:53 37.146.190.20.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 20.189.173.6:443 tcp
US 8.8.8.8:53 194.77.24.184.in-addr.arpa udp

Files

memory/1932-134-0x0000000000400000-0x00000000004B7000-memory.dmp

memory/4824-133-0x0000000000400000-0x0000000000B18000-memory.dmp

memory/4824-137-0x0000000002870000-0x00000000028EB000-memory.dmp

memory/1932-139-0x0000000000400000-0x00000000004B7000-memory.dmp

memory/4824-138-0x00000000029C0000-0x0000000002B63000-memory.dmp

memory/1932-136-0x0000000000400000-0x00000000004B7000-memory.dmp

memory/1932-140-0x0000000000400000-0x00000000004B7000-memory.dmp

memory/1932-141-0x00000000001C0000-0x00000000001C1000-memory.dmp

memory/1932-142-0x0000000000400000-0x00000000004B7000-memory.dmp