Malware Analysis Report

2025-05-28 17:26

Sample ID 230120-me9xxsae26
Target 54b04c4846fab92642827b0d8fa86474.bin
SHA256 73d448c429921a844a556fb0d5addc6af5bab77842fddb4782cbbd18086995ec
Tags
purecrypter downloader loader
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

73d448c429921a844a556fb0d5addc6af5bab77842fddb4782cbbd18086995ec

Threat Level: Known bad

The file 54b04c4846fab92642827b0d8fa86474.bin was found to be: Known bad.

Malicious Activity Summary

purecrypter downloader loader

Purecrypter family

PureCrypter

Checks computer location settings

Suspicious use of SetThreadContext

Enumerates physical storage devices

Program crash

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Gathers network information

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-01-20 10:23

Signatures

Purecrypter family

purecrypter

Analysis: behavioral2

Detonation Overview

Submitted

2023-01-20 10:23

Reported

2023-01-20 10:26

Platform

win10v2004-20221111-en

Max time kernel

124s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\77254af9b820ada0d2f0e274b81dd99279a9a88e2f1b309e99c6399d307ada0e.exe"

Signatures

PureCrypter

loader downloader purecrypter

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\77254af9b820ada0d2f0e274b81dd99279a9a88e2f1b309e99c6399d307ada0e.exe N/A

Enumerates physical storage devices

Gathers network information

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

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\77254af9b820ada0d2f0e274b81dd99279a9a88e2f1b309e99c6399d307ada0e.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4604 wrote to memory of 2512 N/A C:\Users\Admin\AppData\Local\Temp\77254af9b820ada0d2f0e274b81dd99279a9a88e2f1b309e99c6399d307ada0e.exe C:\Windows\System32\cmd.exe
PID 4604 wrote to memory of 2512 N/A C:\Users\Admin\AppData\Local\Temp\77254af9b820ada0d2f0e274b81dd99279a9a88e2f1b309e99c6399d307ada0e.exe C:\Windows\System32\cmd.exe
PID 2512 wrote to memory of 4260 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\ipconfig.exe
PID 2512 wrote to memory of 4260 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\ipconfig.exe
PID 4604 wrote to memory of 4244 N/A C:\Users\Admin\AppData\Local\Temp\77254af9b820ada0d2f0e274b81dd99279a9a88e2f1b309e99c6399d307ada0e.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4604 wrote to memory of 4244 N/A C:\Users\Admin\AppData\Local\Temp\77254af9b820ada0d2f0e274b81dd99279a9a88e2f1b309e99c6399d307ada0e.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4604 wrote to memory of 3708 N/A C:\Users\Admin\AppData\Local\Temp\77254af9b820ada0d2f0e274b81dd99279a9a88e2f1b309e99c6399d307ada0e.exe C:\Windows\System32\cmd.exe
PID 4604 wrote to memory of 3708 N/A C:\Users\Admin\AppData\Local\Temp\77254af9b820ada0d2f0e274b81dd99279a9a88e2f1b309e99c6399d307ada0e.exe C:\Windows\System32\cmd.exe
PID 3708 wrote to memory of 2240 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\ipconfig.exe
PID 3708 wrote to memory of 2240 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\ipconfig.exe
PID 4604 wrote to memory of 4056 N/A C:\Users\Admin\AppData\Local\Temp\77254af9b820ada0d2f0e274b81dd99279a9a88e2f1b309e99c6399d307ada0e.exe C:\Users\Admin\AppData\Local\Temp\77254af9b820ada0d2f0e274b81dd99279a9a88e2f1b309e99c6399d307ada0e.exe
PID 4604 wrote to memory of 4056 N/A C:\Users\Admin\AppData\Local\Temp\77254af9b820ada0d2f0e274b81dd99279a9a88e2f1b309e99c6399d307ada0e.exe C:\Users\Admin\AppData\Local\Temp\77254af9b820ada0d2f0e274b81dd99279a9a88e2f1b309e99c6399d307ada0e.exe
PID 4604 wrote to memory of 4056 N/A C:\Users\Admin\AppData\Local\Temp\77254af9b820ada0d2f0e274b81dd99279a9a88e2f1b309e99c6399d307ada0e.exe C:\Users\Admin\AppData\Local\Temp\77254af9b820ada0d2f0e274b81dd99279a9a88e2f1b309e99c6399d307ada0e.exe
PID 4604 wrote to memory of 4056 N/A C:\Users\Admin\AppData\Local\Temp\77254af9b820ada0d2f0e274b81dd99279a9a88e2f1b309e99c6399d307ada0e.exe C:\Users\Admin\AppData\Local\Temp\77254af9b820ada0d2f0e274b81dd99279a9a88e2f1b309e99c6399d307ada0e.exe
PID 4604 wrote to memory of 4056 N/A C:\Users\Admin\AppData\Local\Temp\77254af9b820ada0d2f0e274b81dd99279a9a88e2f1b309e99c6399d307ada0e.exe C:\Users\Admin\AppData\Local\Temp\77254af9b820ada0d2f0e274b81dd99279a9a88e2f1b309e99c6399d307ada0e.exe
PID 4604 wrote to memory of 4056 N/A C:\Users\Admin\AppData\Local\Temp\77254af9b820ada0d2f0e274b81dd99279a9a88e2f1b309e99c6399d307ada0e.exe C:\Users\Admin\AppData\Local\Temp\77254af9b820ada0d2f0e274b81dd99279a9a88e2f1b309e99c6399d307ada0e.exe

Processes

C:\Users\Admin\AppData\Local\Temp\77254af9b820ada0d2f0e274b81dd99279a9a88e2f1b309e99c6399d307ada0e.exe

"C:\Users\Admin\AppData\Local\Temp\77254af9b820ada0d2f0e274b81dd99279a9a88e2f1b309e99c6399d307ada0e.exe"

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /c ipconfig/release

C:\Windows\system32\ipconfig.exe

ipconfig /release

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /c ipconfig/renew

C:\Windows\system32\ipconfig.exe

ipconfig /renew

C:\Users\Admin\AppData\Local\Temp\77254af9b820ada0d2f0e274b81dd99279a9a88e2f1b309e99c6399d307ada0e.exe

C:\Users\Admin\AppData\Local\Temp\77254af9b820ada0d2f0e274b81dd99279a9a88e2f1b309e99c6399d307ada0e.exe

Network

Country Destination Domain Proto
N/A 8.8.8.8:53 cesarsoriano.pe udp
N/A 8.8.8.8:53 14.110.152.52.in-addr.arpa udp
N/A 161.132.46.17:443 cesarsoriano.pe tcp
N/A 93.184.220.29:80 tcp
N/A 8.8.8.8:53 prelogs.duckdns.org udp
N/A 217.64.149.248:2023 prelogs.duckdns.org tcp
N/A 104.208.16.90:443 tcp
N/A 67.26.111.254:80 tcp
N/A 104.80.225.205:443 tcp
N/A 67.26.111.254:80 tcp
N/A 8.8.8.8:53 prelogs.duckdns.org udp
N/A 217.64.149.248:2023 prelogs.duckdns.org tcp
N/A 8.8.8.8:53 prelogs.duckdns.org udp
N/A 217.64.149.248:2023 prelogs.duckdns.org tcp
N/A 217.64.149.248:2023 prelogs.duckdns.org tcp

Files

memory/4604-132-0x0000021B4E590000-0x0000021B4E5A0000-memory.dmp

memory/4604-133-0x00007FFD9D490000-0x00007FFD9DF51000-memory.dmp

memory/4604-134-0x0000021B691D0000-0x0000021B69220000-memory.dmp

memory/4604-135-0x0000021B69670000-0x0000021B69722000-memory.dmp

memory/4604-136-0x0000021B69620000-0x0000021B69642000-memory.dmp

memory/2512-137-0x0000000000000000-mapping.dmp

memory/4260-138-0x0000000000000000-mapping.dmp

memory/4244-139-0x0000000000000000-mapping.dmp

memory/4244-140-0x00007FFD9D490000-0x00007FFD9DF51000-memory.dmp

memory/4604-141-0x00007FFD9D490000-0x00007FFD9DF51000-memory.dmp

memory/4244-142-0x00007FFD9D490000-0x00007FFD9DF51000-memory.dmp

memory/4244-143-0x00007FFD9D490000-0x00007FFD9DF51000-memory.dmp

memory/3708-144-0x0000000000000000-mapping.dmp

memory/2240-145-0x0000000000000000-mapping.dmp

memory/4056-146-0x0000000000400000-0x00000000004AC000-memory.dmp

memory/4056-147-0x0000000000400000-mapping.dmp

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\77254af9b820ada0d2f0e274b81dd99279a9a88e2f1b309e99c6399d307ada0e.exe.log

MD5 c0927b4be5caf9046812a992778863ca
SHA1 a649a25bca9c4c8798f2fef76938cbeabe740a35
SHA256 722aab6d1ea633f819966594bdccd80680520b8ffe68d6bb370c2d579bc8071e
SHA512 d4028be29140b17916d75370d726c401d26024d66be3bde4ee8c27e79cb9ae664038f08f983f47af4a93cddb48a2b76737922e68bd1ad69f3b226206a07eee70

memory/4604-149-0x00007FFD9D490000-0x00007FFD9DF51000-memory.dmp

memory/4056-150-0x00007FFD9D490000-0x00007FFD9DF51000-memory.dmp

memory/4056-151-0x00007FFD9D490000-0x00007FFD9DF51000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2023-01-20 10:23

Reported

2023-01-20 10:26

Platform

win7-20220812-en

Max time kernel

64s

Max time network

56s

Command Line

"C:\Users\Admin\AppData\Local\Temp\77254af9b820ada0d2f0e274b81dd99279a9a88e2f1b309e99c6399d307ada0e.exe"

Signatures

Processes

C:\Users\Admin\AppData\Local\Temp\77254af9b820ada0d2f0e274b81dd99279a9a88e2f1b309e99c6399d307ada0e.exe

"C:\Users\Admin\AppData\Local\Temp\77254af9b820ada0d2f0e274b81dd99279a9a88e2f1b309e99c6399d307ada0e.exe"

C:\Windows\system32\WerFault.exe

C:\Windows\system32\WerFault.exe -u -p 1480 -s 1060

Network

Country Destination Domain Proto
N/A 8.8.8.8:53 cesarsoriano.pe udp
N/A 161.132.46.17:443 cesarsoriano.pe tcp
N/A 161.132.46.17:443 cesarsoriano.pe tcp
N/A 161.132.46.17:443 cesarsoriano.pe tcp
N/A 161.132.46.17:443 cesarsoriano.pe tcp
N/A 161.132.46.17:443 cesarsoriano.pe tcp

Files

memory/1480-54-0x00000000010C0000-0x00000000010D0000-memory.dmp

memory/1544-55-0x0000000000000000-mapping.dmp