Malware Analysis Report

2025-06-16 07:30

Sample ID 240602-f2vm7ach56
Target 2024-06-02_3d024fb7baaa334c2960f3fbeedd05fb_cryptolocker
SHA256 5ec61f5a1d05c4c65b3416e73daa69b8453d62140cdadf5f3b967fd66cdb6ceb
Tags
upx
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

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

5ec61f5a1d05c4c65b3416e73daa69b8453d62140cdadf5f3b967fd66cdb6ceb

Threat Level: Known bad

The file 2024-06-02_3d024fb7baaa334c2960f3fbeedd05fb_cryptolocker was found to be: Known bad.

Malicious Activity Summary

upx

UPX dump on OEP (original entry point)

Detection of CryptoLocker Variants

Detection of CryptoLocker Variants

UPX dump on OEP (original entry point)

UPX packed file

Executes dropped EXE

Loads dropped DLL

Checks computer location settings

Unsigned PE

Enumerates physical storage devices

Suspicious use of UnmapMainImage

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-02 05:22

Signatures

Detection of CryptoLocker Variants

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

UPX dump on OEP (original entry point)

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

UPX packed file

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

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-02 05:22

Reported

2024-06-02 05:25

Platform

win7-20240221-en

Max time kernel

122s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-02_3d024fb7baaa334c2960f3fbeedd05fb_cryptolocker.exe"

Signatures

Detection of CryptoLocker Variants

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

UPX dump on OEP (original entry point)

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

Executes dropped EXE

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

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\2024-06-02_3d024fb7baaa334c2960f3fbeedd05fb_cryptolocker.exe N/A

UPX packed file

upx
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

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\2024-06-02_3d024fb7baaa334c2960f3fbeedd05fb_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-02_3d024fb7baaa334c2960f3fbeedd05fb_cryptolocker.exe"

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 nasap.net udp
US 35.212.119.5:443 nasap.net tcp

Files

memory/2860-0-0x0000000000400000-0x000000000040E000-memory.dmp

memory/2860-1-0x00000000005C0000-0x00000000005C6000-memory.dmp

memory/2860-2-0x0000000000400000-0x0000000000406000-memory.dmp

memory/2860-9-0x00000000005C0000-0x00000000005C6000-memory.dmp

\Users\Admin\AppData\Local\Temp\gewos.exe

MD5 c2f7c450456777d0bbd7c871567731db
SHA1 7e003d132fdacd1cbe4cc4daa0eb534f78523a45
SHA256 5c10a9ac7d93af10f0979da619232bb83d4f0f01eb059fbcdd8f6bff8bcc86ee
SHA512 33e9f599be7a6743265995c2d0ace6223ae0a508037d1181a8394506292275aa38b9cced192e67dfa795cbc1aea1908a4af04ed4db669a577a24bc354b6126ec

memory/2860-13-0x0000000000810000-0x000000000081E000-memory.dmp

memory/2116-17-0x0000000000400000-0x000000000040E000-memory.dmp

memory/2116-26-0x0000000000210000-0x0000000000216000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-02 05:22

Reported

2024-06-02 05:25

Platform

win10v2004-20240426-en

Max time kernel

90s

Max time network

123s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-02_3d024fb7baaa334c2960f3fbeedd05fb_cryptolocker.exe"

Signatures

Detection of CryptoLocker Variants

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

UPX dump on OEP (original entry point)

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

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\2024-06-02_3d024fb7baaa334c2960f3fbeedd05fb_cryptolocker.exe N/A
Key value queried \REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\gewos.exe N/A

Executes dropped EXE

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

UPX packed file

upx
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

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\2024-06-02_3d024fb7baaa334c2960f3fbeedd05fb_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-02_3d024fb7baaa334c2960f3fbeedd05fb_cryptolocker.exe"

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 nasap.net udp
US 35.212.119.5:443 nasap.net tcp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 5.119.212.35.in-addr.arpa udp
US 8.8.8.8:53 226.20.18.104.in-addr.arpa udp
US 8.8.8.8:53 73.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 91.90.14.23.in-addr.arpa udp

Files

memory/1140-0-0x0000000000400000-0x000000000040E000-memory.dmp

memory/1140-1-0x0000000000500000-0x0000000000506000-memory.dmp

memory/1140-2-0x0000000000400000-0x0000000000406000-memory.dmp

memory/1140-9-0x0000000000500000-0x0000000000506000-memory.dmp

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

MD5 c2f7c450456777d0bbd7c871567731db
SHA1 7e003d132fdacd1cbe4cc4daa0eb534f78523a45
SHA256 5c10a9ac7d93af10f0979da619232bb83d4f0f01eb059fbcdd8f6bff8bcc86ee
SHA512 33e9f599be7a6743265995c2d0ace6223ae0a508037d1181a8394506292275aa38b9cced192e67dfa795cbc1aea1908a4af04ed4db669a577a24bc354b6126ec

memory/2584-19-0x0000000000400000-0x000000000040E000-memory.dmp

memory/2584-21-0x0000000002190000-0x0000000002196000-memory.dmp

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

MD5 4f0ca1b622d722145d4362acd91c5ce5
SHA1 ddab15c0781a9c08bae9e6366d47f1be91708851
SHA256 2bd91df1429af0bf0a2a68156d3be3379a20313d8537b7ba495c1c2812e34a5d
SHA512 77915e078ddf6caadd2b367fdccbbe0cc5435b106636f49bca58ab2e8514350ef21b4c8741da520d4b41e1233ee0cec3b96c025a588201cba622831a7387021c