Malware Analysis Report

2025-01-18 09:30

Sample ID 240131-s567lsfec6
Target 28836_2593959416481.js
SHA256 23107ced99838695bf4391c1271bafce47fad96e95b28f52df0a060038f80a7b
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

23107ced99838695bf4391c1271bafce47fad96e95b28f52df0a060038f80a7b

Threat Level: Known bad

The file 28836_2593959416481.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

2024-01-31 15:43

Signatures

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-01-31 15:43

Reported

2024-01-31 15:46

Platform

win10v2004-20231222-en

Max time kernel

145s

Max time network

150s

Command Line

wscript.exe C:\Users\Admin\AppData\Local\Temp\28836_2593959416481.js

Signatures

Strela

stealer strela

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\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 2544 wrote to memory of 1232 N/A C:\Windows\system32\wscript.exe C:\Windows\System32\cmd.exe
PID 2544 wrote to memory of 1232 N/A C:\Windows\system32\wscript.exe C:\Windows\System32\cmd.exe
PID 1232 wrote to memory of 2196 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\findstr.exe
PID 1232 wrote to memory of 2196 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\findstr.exe
PID 1232 wrote to memory of 2752 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\certutil.exe
PID 1232 wrote to memory of 2752 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\certutil.exe
PID 1232 wrote to memory of 3732 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\rundll32.exe
PID 1232 wrote to memory of 3732 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\28836_2593959416481.js

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /k copy "C:\Users\Admin\AppData\Local\Temp\28836_2593959416481.js" "C:\Users\Admin\\pleasantobject.bat" && "C:\Users\Admin\\pleasantobject.bat"

C:\Windows\system32\findstr.exe

findstr /V militarysnore ""C:\Users\Admin\\pleasantobject.bat""

C:\Windows\system32\rundll32.exe

rundll32 gatewoman.dll,main

C:\Windows\system32\certutil.exe

certutil -f -decode shakyinconclusive gatewoman.dll

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 181.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 72.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 88.65.42.20.in-addr.arpa udp

Files

C:\Users\Admin\pleasantobject.bat

MD5 6a6c6d9614e572fedbfb8d2eb108bb42
SHA1 347b37c4eb1c9d6f6d18d7ec13291436b43bab79
SHA256 23107ced99838695bf4391c1271bafce47fad96e95b28f52df0a060038f80a7b
SHA512 e7b0a9980f6a08c709ce251baf43553c1799dd7593ad8620d80aeaa1366934072bfd40edbc4d3b6660e8c31b6a74577ad34eb7fd93a3685ac4504eed58c22499

C:\Users\Admin\shakyinconclusive

MD5 6423b4a456dc34d7c6f67740aaa371fa
SHA1 d9d4c432b60581b9d8b3fdd55e781ce5ff5e6df5
SHA256 25abcd9fb9ee09402dbc40b58466283739f223932fef07239f11548af088e9b4
SHA512 31c99c287ad497c14f70bd99163e9304952f662089b774ebbc94bf70c07e27ecc683d9e4ace957f17028883c0643e55a0e5ffcceaacc33e95ffd9f748c61b181

C:\Users\Admin\gatewoman.dll

MD5 d5f35509799fe456a67d41558f1b0f80
SHA1 c7d1cb4541fadc69dc2f3a6f04b2940600d12e5c
SHA256 ae1388f95f2678b7b6aabaf430b646710cdea10850c2556fbfcc0fb068e6fe4e
SHA512 a9ed4db26bde7a085678ad15fb01e6be0ff4af0c8ffc5f6cdde99d9141b01e6889dbe2f172ae1723f479e0c75488eee6a7a6e79a7529c4dbb95381a80a1c6e48

memory/3732-1416-0x000001B5A4A80000-0x000001B5A4AA3000-memory.dmp

memory/3732-1415-0x00007FF87D500000-0x00007FF87D60E000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-01-31 15:43

Reported

2024-01-31 15:46

Platform

win7-20231129-en

Max time kernel

117s

Max time network

117s

Command Line

wscript.exe C:\Users\Admin\AppData\Local\Temp\28836_2593959416481.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

Processes

C:\Windows\system32\wscript.exe

wscript.exe C:\Users\Admin\AppData\Local\Temp\28836_2593959416481.js

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /k copy "C:\Users\Admin\AppData\Local\Temp\28836_2593959416481.js" "C:\Users\Admin\\pleasantobject.bat" && "C:\Users\Admin\\pleasantobject.bat"

C:\Windows\system32\findstr.exe

findstr /V militarysnore ""C:\Users\Admin\\pleasantobject.bat""

C:\Windows\system32\certutil.exe

certutil -f -decode shakyinconclusive gatewoman.dll

C:\Windows\system32\rundll32.exe

rundll32 gatewoman.dll,main

Network

N/A

Files

C:\Users\Admin\pleasantobject.bat

MD5 6a6c6d9614e572fedbfb8d2eb108bb42
SHA1 347b37c4eb1c9d6f6d18d7ec13291436b43bab79
SHA256 23107ced99838695bf4391c1271bafce47fad96e95b28f52df0a060038f80a7b
SHA512 e7b0a9980f6a08c709ce251baf43553c1799dd7593ad8620d80aeaa1366934072bfd40edbc4d3b6660e8c31b6a74577ad34eb7fd93a3685ac4504eed58c22499

\Users\Admin\gatewoman.dll

MD5 d5f35509799fe456a67d41558f1b0f80
SHA1 c7d1cb4541fadc69dc2f3a6f04b2940600d12e5c
SHA256 ae1388f95f2678b7b6aabaf430b646710cdea10850c2556fbfcc0fb068e6fe4e
SHA512 a9ed4db26bde7a085678ad15fb01e6be0ff4af0c8ffc5f6cdde99d9141b01e6889dbe2f172ae1723f479e0c75488eee6a7a6e79a7529c4dbb95381a80a1c6e48

C:\Users\Admin\shakyinconclusive

MD5 6423b4a456dc34d7c6f67740aaa371fa
SHA1 d9d4c432b60581b9d8b3fdd55e781ce5ff5e6df5
SHA256 25abcd9fb9ee09402dbc40b58466283739f223932fef07239f11548af088e9b4
SHA512 31c99c287ad497c14f70bd99163e9304952f662089b774ebbc94bf70c07e27ecc683d9e4ace957f17028883c0643e55a0e5ffcceaacc33e95ffd9f748c61b181

memory/1408-1419-0x0000000000390000-0x00000000003B3000-memory.dmp

memory/1408-1418-0x000007FEF67A0000-0x000007FEF68AE000-memory.dmp

memory/1408-1420-0x0000000000390000-0x00000000003B3000-memory.dmp