Malware Analysis Report

2025-01-18 09:29

Sample ID 240326-rwcqzacc63
Target 3189efaf23301_mail77d2817cfb69a8bfa3b846c24ec534aa3e6b66c8a28f3b18d4bXxX6Zip.zip
SHA256 3189efaf2330177d2817cfb69a8bfa3b846c24ec534aa3e6b66c8a28f3b18d4b
Tags
strela stealer
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

3189efaf2330177d2817cfb69a8bfa3b846c24ec534aa3e6b66c8a28f3b18d4b

Threat Level: Known bad

The file 3189efaf23301_mail77d2817cfb69a8bfa3b846c24ec534aa3e6b66c8a28f3b18d4bXxX6Zip.zip was found to be: Known bad.

Malicious Activity Summary

strela stealer

Strela

Loads dropped DLL

Checks computer location settings

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-03-26 14:32

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-26 14:32

Reported

2024-03-26 14:34

Platform

win7-20240319-en

Max time kernel

121s

Max time network

124s

Command Line

wscript.exe C:\Users\Admin\AppData\Local\Temp\18262829011200.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 2984 wrote to memory of 2092 N/A C:\Windows\system32\wscript.exe C:\Windows\System32\cmd.exe
PID 2984 wrote to memory of 2092 N/A C:\Windows\system32\wscript.exe C:\Windows\System32\cmd.exe
PID 2984 wrote to memory of 2092 N/A C:\Windows\system32\wscript.exe C:\Windows\System32\cmd.exe
PID 2092 wrote to memory of 2992 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\findstr.exe
PID 2092 wrote to memory of 2992 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\findstr.exe
PID 2092 wrote to memory of 2992 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\findstr.exe
PID 2092 wrote to memory of 2016 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\certutil.exe
PID 2092 wrote to memory of 2016 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\certutil.exe
PID 2092 wrote to memory of 2016 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\certutil.exe
PID 2092 wrote to memory of 2512 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\cmd.exe
PID 2092 wrote to memory of 2512 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\cmd.exe
PID 2092 wrote to memory of 2512 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\cmd.exe
PID 2512 wrote to memory of 3060 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\rundll32.exe
PID 2512 wrote to memory of 3060 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\rundll32.exe
PID 2512 wrote to memory of 3060 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\18262829011200.js

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /k copy "C:\Users\Admin\AppData\Local\Temp\18262829011200.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/3060-393-0x000007FEF71C0000-0x000007FEF7207000-memory.dmp

memory/3060-394-0x0000000000280000-0x00000000002A3000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-26 14:32

Reported

2024-03-26 14:34

Platform

win10v2004-20240226-en

Max time kernel

147s

Max time network

155s

Command Line

wscript.exe C:\Users\Admin\AppData\Local\Temp\18262829011200.js

Signatures

Strela

stealer strela

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\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 2380 wrote to memory of 1456 N/A C:\Windows\system32\wscript.exe C:\Windows\System32\cmd.exe
PID 2380 wrote to memory of 1456 N/A C:\Windows\system32\wscript.exe C:\Windows\System32\cmd.exe
PID 1456 wrote to memory of 3136 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\findstr.exe
PID 1456 wrote to memory of 3136 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\findstr.exe
PID 1456 wrote to memory of 800 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\certutil.exe
PID 1456 wrote to memory of 800 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\certutil.exe
PID 1456 wrote to memory of 3504 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\cmd.exe
PID 1456 wrote to memory of 3504 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\cmd.exe
PID 3504 wrote to memory of 3304 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\rundll32.exe
PID 3504 wrote to memory of 3304 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\18262829011200.js

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /k copy "C:\Users\Admin\AppData\Local\Temp\18262829011200.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

Country Destination Domain Proto
US 8.8.8.8:53 71.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 66.179.17.96.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 79.121.231.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.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
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 76.179.17.96.in-addr.arpa udp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 137.71.105.51.in-addr.arpa udp

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/3304-390-0x00007FFC4BDC0000-0x00007FFC4BE07000-memory.dmp

memory/3304-391-0x000001F80AED0000-0x000001F80AEF3000-memory.dmp

memory/3304-392-0x000001F80AED0000-0x000001F80AEF3000-memory.dmp