Malware Analysis Report

2025-01-18 09:29

Sample ID 240325-v9zpfahb8t
Target 18262829011200.js
SHA256 544887bc3f0dccb610dd7ba35b498a03ea32fca047e133a0639d5bca61cc6f45
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

544887bc3f0dccb610dd7ba35b498a03ea32fca047e133a0639d5bca61cc6f45

Threat Level: Known bad

The file 18262829011200.js 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

2024-03-25 17:42

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-25 17:42

Reported

2024-03-25 17:44

Platform

win7-20240220-en

Max time kernel

120s

Max time network

120s

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 1976 wrote to memory of 2948 N/A C:\Windows\system32\wscript.exe C:\Windows\System32\cmd.exe
PID 1976 wrote to memory of 2948 N/A C:\Windows\system32\wscript.exe C:\Windows\System32\cmd.exe
PID 1976 wrote to memory of 2948 N/A C:\Windows\system32\wscript.exe C:\Windows\System32\cmd.exe
PID 2948 wrote to memory of 2892 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\findstr.exe
PID 2948 wrote to memory of 2892 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\findstr.exe
PID 2948 wrote to memory of 2892 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\findstr.exe
PID 2948 wrote to memory of 2740 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\certutil.exe
PID 2948 wrote to memory of 2740 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\certutil.exe
PID 2948 wrote to memory of 2740 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\certutil.exe
PID 2948 wrote to memory of 2204 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\cmd.exe
PID 2948 wrote to memory of 2204 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\cmd.exe
PID 2948 wrote to memory of 2204 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\cmd.exe
PID 2204 wrote to memory of 2572 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\rundll32.exe
PID 2204 wrote to memory of 2572 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\rundll32.exe
PID 2204 wrote to memory of 2572 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/2572-393-0x000007FEF6D60000-0x000007FEF6DA7000-memory.dmp

memory/2572-394-0x0000000000140000-0x0000000000163000-memory.dmp

memory/2572-395-0x0000000000140000-0x0000000000163000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-25 17:42

Reported

2024-03-25 17:44

Platform

win10v2004-20240226-en

Max time kernel

147s

Max time network

153s

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-1-5-21-557049126-2506969350-2798870634-1000\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 2568 wrote to memory of 2300 N/A C:\Windows\system32\wscript.exe C:\Windows\System32\cmd.exe
PID 2568 wrote to memory of 2300 N/A C:\Windows\system32\wscript.exe C:\Windows\System32\cmd.exe
PID 2300 wrote to memory of 3916 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\findstr.exe
PID 2300 wrote to memory of 3916 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\findstr.exe
PID 2300 wrote to memory of 4952 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\certutil.exe
PID 2300 wrote to memory of 4952 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\certutil.exe
PID 2300 wrote to memory of 4740 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\cmd.exe
PID 2300 wrote to memory of 4740 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\cmd.exe
PID 4740 wrote to memory of 3636 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\rundll32.exe
PID 4740 wrote to memory of 3636 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 76.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 65.179.17.96.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.200:443 g.bing.com tcp
US 8.8.8.8:53 73.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 183.142.211.20.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 173.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.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 8.8.8.8:53 41.173.79.40.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/3636-390-0x00007FFFE5B20000-0x00007FFFE5B67000-memory.dmp

memory/3636-391-0x000002C856550000-0x000002C856573000-memory.dmp