Malware Analysis Report

2025-01-18 09:31

Sample ID 240327-b7qtzahf23
Target 301503edfb1ea723b231b416c2a81f0f.bin
SHA256 71b785d3ee8272a0a24130c98e06752f868a60231a3542fc63ac38edc2895b1b
Tags
strela stealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

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

71b785d3ee8272a0a24130c98e06752f868a60231a3542fc63ac38edc2895b1b

Threat Level: Known bad

The file 301503edfb1ea723b231b416c2a81f0f.bin was found to be: Known bad.

Malicious Activity Summary

strela stealer

Strela

Checks computer location settings

Loads dropped DLL

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-03-27 01:47

Signatures

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-27 01:47

Reported

2024-03-27 01:50

Platform

win10v2004-20240226-en

Max time kernel

156s

Max time network

169s

Command Line

wscript.exe C:\Users\Admin\AppData\Local\Temp\544887bc3f0dccb610dd7ba35b498a03ea32fca047e133a0639d5bca61cc6f45.js

Signatures

Strela

stealer strela

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-1904519900-954640453-4250331663-1000\Control Panel\International\Geo\Nation C:\Windows\system32\wscript.exe N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Windows\system32\rundll32.exe N/A

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1916 wrote to memory of 3408 N/A C:\Windows\system32\wscript.exe C:\Windows\System32\cmd.exe
PID 1916 wrote to memory of 3408 N/A C:\Windows\system32\wscript.exe C:\Windows\System32\cmd.exe
PID 3408 wrote to memory of 3028 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\findstr.exe
PID 3408 wrote to memory of 3028 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\findstr.exe
PID 3408 wrote to memory of 4804 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\certutil.exe
PID 3408 wrote to memory of 4804 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\certutil.exe
PID 3408 wrote to memory of 3872 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\cmd.exe
PID 3408 wrote to memory of 3872 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\cmd.exe
PID 3872 wrote to memory of 4160 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\rundll32.exe
PID 3872 wrote to memory of 4160 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\rundll32.exe

Processes

C:\Windows\system32\wscript.exe

wscript.exe C:\Users\Admin\AppData\Local\Temp\544887bc3f0dccb610dd7ba35b498a03ea32fca047e133a0639d5bca61cc6f45.js

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /k copy "C:\Users\Admin\AppData\Local\Temp\544887bc3f0dccb610dd7ba35b498a03ea32fca047e133a0639d5bca61cc6f45.js" "C:\Users\Admin\AppData\Local\Temp\\trousersperpetual.bat" && "C:\Users\Admin\AppData\Local\Temp\\trousersperpetual.bat"

C:\Windows\system32\findstr.exe

findstr /V marrywise ""C:\Users\Admin\AppData\Local\Temp\\trousersperpetual.bat""

C:\Windows\system32\certutil.exe

certutil -f -decode magnificentdevelopment returnready.dll

C:\Windows\system32\cmd.exe

cmd /c rundll32 returnready.dll,m

C:\Windows\system32\rundll32.exe

rundll32 returnready.dll,m

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1028 --field-trial-handle=2272,i,17338911640954948469,1637568328132129119,262144 --variations-seed-version /prefetch:8

Network

Country Destination Domain Proto
US 20.231.121.79:80 tcp
US 8.8.8.8:53 14.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 194.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 2.136.104.51.in-addr.arpa udp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp
US 13.107.246.64:443 tcp
US 8.8.8.8:53 chromewebstore.googleapis.com udp
US 8.8.8.8:53 chromewebstore.googleapis.com udp
GB 216.58.213.10:443 chromewebstore.googleapis.com tcp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 10.213.58.216.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp

Files

C:\Users\Admin\AppData\Local\Temp\trousersperpetual.bat

MD5 301503edfb1ea723b231b416c2a81f0f
SHA1 dd41fda85637d2593ef4aad407371ec830fe171d
SHA256 544887bc3f0dccb610dd7ba35b498a03ea32fca047e133a0639d5bca61cc6f45
SHA512 f5df4b28a0f012b458026ef7caa2f460f51476a67e63e63641631dc5672b4920422618afb36af17373ffdfcc678370dc965678f3d3f1dda5326589c2a471f9d5

C:\Users\Admin\AppData\Local\Temp\magnificentdevelopment

MD5 04d8d28e9039e6861017650bb59f24b3
SHA1 53741049bc23ab05658dc32ad54326a87dd0edee
SHA256 54d3f28c9044ca9b16d3584d7bfac00c65f8aa6369801b340e1a7348d4681bef
SHA512 05c9830335b82a5dd020e097e8fb3241e52d60875d951b13dfe82ad590c922ed6884ae5f9a1d2a6270c0d3456bc88ed8d373c5fdedca8a604f65ce986f00cf32

C:\Users\Admin\AppData\Local\Temp\returnready.dll

MD5 9499f14143b34ea7703c73b5f9b37013
SHA1 ceff6b19826c9a4e9b9e8cbcc512d5241a27825e
SHA256 e6991b12e86629b38e178fef129dfda1d454391ffbb236703f8c026d6d55b9a1
SHA512 f14dec41f677fb3e2af064b4b7a6b3b15bec8429a831a78247513853d4ce7511ed37e89e52ebadbed03ab9115dcea3cc316b90e99c939d07402b5a554d722668

memory/4160-390-0x0000016F778F0000-0x0000016F77913000-memory.dmp

memory/4160-391-0x00007FF98EE10000-0x00007FF98EE57000-memory.dmp

memory/4160-392-0x0000016F778F0000-0x0000016F77913000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-27 01:47

Reported

2024-03-27 01:49

Platform

win7-20240220-en

Max time kernel

120s

Max time network

121s

Command Line

wscript.exe C:\Users\Admin\AppData\Local\Temp\544887bc3f0dccb610dd7ba35b498a03ea32fca047e133a0639d5bca61cc6f45.js

Signatures

Strela

stealer strela

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Windows\system32\rundll32.exe N/A
N/A N/A C:\Windows\system32\rundll32.exe N/A
N/A N/A C:\Windows\system32\rundll32.exe N/A
N/A N/A C:\Windows\system32\rundll32.exe N/A

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2360 wrote to memory of 1744 N/A C:\Windows\system32\wscript.exe C:\Windows\System32\cmd.exe
PID 2360 wrote to memory of 1744 N/A C:\Windows\system32\wscript.exe C:\Windows\System32\cmd.exe
PID 2360 wrote to memory of 1744 N/A C:\Windows\system32\wscript.exe C:\Windows\System32\cmd.exe
PID 1744 wrote to memory of 1596 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\findstr.exe
PID 1744 wrote to memory of 1596 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\findstr.exe
PID 1744 wrote to memory of 1596 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\findstr.exe
PID 1744 wrote to memory of 1792 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\certutil.exe
PID 1744 wrote to memory of 1792 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\certutil.exe
PID 1744 wrote to memory of 1792 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\certutil.exe
PID 1744 wrote to memory of 1300 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\cmd.exe
PID 1744 wrote to memory of 1300 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\cmd.exe
PID 1744 wrote to memory of 1300 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\cmd.exe
PID 1300 wrote to memory of 2176 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\rundll32.exe
PID 1300 wrote to memory of 2176 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\rundll32.exe
PID 1300 wrote to memory of 2176 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\rundll32.exe

Processes

C:\Windows\system32\wscript.exe

wscript.exe C:\Users\Admin\AppData\Local\Temp\544887bc3f0dccb610dd7ba35b498a03ea32fca047e133a0639d5bca61cc6f45.js

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /k copy "C:\Users\Admin\AppData\Local\Temp\544887bc3f0dccb610dd7ba35b498a03ea32fca047e133a0639d5bca61cc6f45.js" "C:\Users\Admin\AppData\Local\Temp\\trousersperpetual.bat" && "C:\Users\Admin\AppData\Local\Temp\\trousersperpetual.bat"

C:\Windows\system32\findstr.exe

findstr /V marrywise ""C:\Users\Admin\AppData\Local\Temp\\trousersperpetual.bat""

C:\Windows\system32\certutil.exe

certutil -f -decode magnificentdevelopment returnready.dll

C:\Windows\system32\cmd.exe

cmd /c rundll32 returnready.dll,m

C:\Windows\system32\rundll32.exe

rundll32 returnready.dll,m

Network

N/A

Files

C:\Users\Admin\AppData\Local\Temp\trousersperpetual.bat

MD5 301503edfb1ea723b231b416c2a81f0f
SHA1 dd41fda85637d2593ef4aad407371ec830fe171d
SHA256 544887bc3f0dccb610dd7ba35b498a03ea32fca047e133a0639d5bca61cc6f45
SHA512 f5df4b28a0f012b458026ef7caa2f460f51476a67e63e63641631dc5672b4920422618afb36af17373ffdfcc678370dc965678f3d3f1dda5326589c2a471f9d5

C:\Users\Admin\AppData\Local\Temp\magnificentdevelopment

MD5 04d8d28e9039e6861017650bb59f24b3
SHA1 53741049bc23ab05658dc32ad54326a87dd0edee
SHA256 54d3f28c9044ca9b16d3584d7bfac00c65f8aa6369801b340e1a7348d4681bef
SHA512 05c9830335b82a5dd020e097e8fb3241e52d60875d951b13dfe82ad590c922ed6884ae5f9a1d2a6270c0d3456bc88ed8d373c5fdedca8a604f65ce986f00cf32

C:\Users\Admin\AppData\Local\Temp\returnready.dll

MD5 9499f14143b34ea7703c73b5f9b37013
SHA1 ceff6b19826c9a4e9b9e8cbcc512d5241a27825e
SHA256 e6991b12e86629b38e178fef129dfda1d454391ffbb236703f8c026d6d55b9a1
SHA512 f14dec41f677fb3e2af064b4b7a6b3b15bec8429a831a78247513853d4ce7511ed37e89e52ebadbed03ab9115dcea3cc316b90e99c939d07402b5a554d722668

memory/2176-394-0x0000000001E60000-0x0000000001E83000-memory.dmp

memory/2176-393-0x000007FEF7650000-0x000007FEF7697000-memory.dmp