Malware Analysis Report

2024-12-07 20:39

Sample ID 241122-czcstasnfy
Target 538aefe2d62a53a7b5991a4acda23b8f04aeba4fee1959018ddc375ed6858e5b.zip
SHA256 538aefe2d62a53a7b5991a4acda23b8f04aeba4fee1959018ddc375ed6858e5b
Tags
strrat persistence
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

538aefe2d62a53a7b5991a4acda23b8f04aeba4fee1959018ddc375ed6858e5b

Threat Level: Known bad

The file 538aefe2d62a53a7b5991a4acda23b8f04aeba4fee1959018ddc375ed6858e5b.zip was found to be: Known bad.

Malicious Activity Summary

strrat persistence

Strrat family

Drops startup file

Adds Run key to start application

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-22 02:30

Signatures

Strrat family

strrat

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-22 02:30

Reported

2024-11-22 02:33

Platform

win7-20240708-en

Max time kernel

146s

Max time network

148s

Command Line

java -jar C:\Users\Admin\AppData\Local\Temp\MIS_FILE_9888123_RECEIVED_xsls.jar

Signatures

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\MIS_FILE_9888123_RECEIVED_xsls.jar C:\Windows\system32\java.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Windows\CurrentVersion\Run\MIS_FILE_9888123_RECEIVED_xsls = "\"C:\\Program Files\\Java\\jre7\\bin\\javaw.exe\" -jar \"C:\\Users\\Admin\\AppData\\Roaming\\MIS_FILE_9888123_RECEIVED_xsls.jar\"" C:\Windows\system32\java.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MIS_FILE_9888123_RECEIVED_xsls = "\"C:\\Program Files\\Java\\jre7\\bin\\javaw.exe\" -jar \"C:\\Users\\Admin\\AppData\\Roaming\\MIS_FILE_9888123_RECEIVED_xsls.jar\"" C:\Windows\system32\java.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2876 wrote to memory of 2708 N/A C:\Windows\system32\java.exe C:\Program Files\Java\jre7\bin\java.exe
PID 2876 wrote to memory of 2708 N/A C:\Windows\system32\java.exe C:\Program Files\Java\jre7\bin\java.exe
PID 2876 wrote to memory of 2708 N/A C:\Windows\system32\java.exe C:\Program Files\Java\jre7\bin\java.exe

Processes

C:\Windows\system32\java.exe

java -jar C:\Users\Admin\AppData\Local\Temp\MIS_FILE_9888123_RECEIVED_xsls.jar

C:\Program Files\Java\jre7\bin\java.exe

"C:\Program Files\Java\jre7\bin\java.exe" -jar "C:\Users\Admin\AppData\Roaming\MIS_FILE_9888123_RECEIVED_xsls.jar"

Network

Country Destination Domain Proto
US 8.8.8.8:53 macostopacros.3utilities.com udp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
US 8.8.8.8:53 prtoacasedted.3utilities.com udp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
US 8.8.8.8:53 macostopacros.3utilities.com udp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
US 8.8.8.8:53 macostopacros.3utilities.com udp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp

Files

memory/2876-2-0x00000000025A0000-0x0000000002810000-memory.dmp

memory/2876-10-0x0000000000340000-0x0000000000341000-memory.dmp

C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Startup\MIS_FILE_9888123_RECEIVED_xsls.jar

MD5 1a7a05db5686a51ce39c3b35c111d73f
SHA1 c6ba4712046569c3d6601e5d2f85aeecfabef69b
SHA256 bbd5de9d533b350b86e4d9aa54b6545c6e890c4f263ad27433b2c995faf89493
SHA512 f15d3e2f5cd3a10111c87c2f6c1d8d7bf51fab14f9e6c33ffde067a5c7df2d7f81055d0ba331a840a33ba596cb45e782299f626367a928447a08480d41a3a1c9

memory/2876-20-0x00000000025A0000-0x0000000002810000-memory.dmp

memory/2708-21-0x0000000002680000-0x00000000028F0000-memory.dmp

memory/2708-29-0x0000000000450000-0x0000000000451000-memory.dmp

memory/2708-31-0x0000000002680000-0x00000000028F0000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-22 02:30

Reported

2024-11-22 02:33

Platform

win10v2004-20241007-en

Max time kernel

146s

Max time network

147s

Command Line

java -jar C:\Users\Admin\AppData\Local\Temp\MIS_FILE_9888123_RECEIVED_xsls.jar

Signatures

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\MIS_FILE_9888123_RECEIVED_xsls.jar C:\Program Files (x86)\Common Files\Oracle\Java\javapath\java.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MIS_FILE_9888123_RECEIVED_xsls = "\"C:\\Program Files\\Java\\jre-1.8\\bin\\javaw.exe\" -jar \"C:\\Users\\Admin\\AppData\\Roaming\\MIS_FILE_9888123_RECEIVED_xsls.jar\"" C:\Program Files (x86)\Common Files\Oracle\Java\javapath\java.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MIS_FILE_9888123_RECEIVED_xsls = "\"C:\\Program Files\\Java\\jre-1.8\\bin\\javaw.exe\" -jar \"C:\\Users\\Admin\\AppData\\Roaming\\MIS_FILE_9888123_RECEIVED_xsls.jar\"" C:\Program Files (x86)\Common Files\Oracle\Java\javapath\java.exe N/A

Processes

C:\Program Files (x86)\Common Files\Oracle\Java\javapath\java.exe

java -jar C:\Users\Admin\AppData\Local\Temp\MIS_FILE_9888123_RECEIVED_xsls.jar

C:\Program Files\Java\jre-1.8\bin\java.exe

"C:\Program Files\Java\jre-1.8\bin\java.exe" -jar "C:\Users\Admin\AppData\Roaming\MIS_FILE_9888123_RECEIVED_xsls.jar"

Network

Country Destination Domain Proto
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 macostopacros.3utilities.com udp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
US 8.8.8.8:53 2.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 prtoacasedted.3utilities.com udp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
US 8.8.8.8:53 prtoacasedted.3utilities.com udp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
US 8.8.8.8:53 56.163.245.4.in-addr.arpa udp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 prtoacasedted.3utilities.com udp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
US 8.8.8.8:53 prtoacasedted.3utilities.com udp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
US 8.8.8.8:53 prtoacasedted.3utilities.com udp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
US 8.8.8.8:53 prtoacasedted.3utilities.com udp
US 8.8.8.8:53 macostopacros.3utilities.com udp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
US 8.8.8.8:53 prtoacasedted.3utilities.com udp
US 8.8.8.8:53 31.243.111.52.in-addr.arpa udp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
US 8.8.8.8:53 prtoacasedted.3utilities.com udp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
US 8.8.8.8:53 prtoacasedted.3utilities.com udp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp
US 8.8.8.8:53 prtoacasedted.3utilities.com udp
BG 87.120.115.30:3095 macostopacros.3utilities.com tcp

Files

memory/2840-2-0x000001E20F4A0000-0x000001E20F710000-memory.dmp

memory/2840-13-0x000001E20F710000-0x000001E20F720000-memory.dmp

memory/2840-14-0x000001E20F720000-0x000001E20F730000-memory.dmp

memory/2840-16-0x000001E20F730000-0x000001E20F740000-memory.dmp

memory/2840-20-0x000001E20F750000-0x000001E20F760000-memory.dmp

memory/2840-19-0x000001E20F740000-0x000001E20F750000-memory.dmp

memory/2840-22-0x000001E20F760000-0x000001E20F770000-memory.dmp

memory/2840-25-0x000001E20F770000-0x000001E20F780000-memory.dmp

memory/2840-28-0x000001E20F780000-0x000001E20F790000-memory.dmp

C:\ProgramData\Microsoft\Windows\Start Menu\Programs\StartUp\MIS_FILE_9888123_RECEIVED_xsls.jar

MD5 1a7a05db5686a51ce39c3b35c111d73f
SHA1 c6ba4712046569c3d6601e5d2f85aeecfabef69b
SHA256 bbd5de9d533b350b86e4d9aa54b6545c6e890c4f263ad27433b2c995faf89493
SHA512 f15d3e2f5cd3a10111c87c2f6c1d8d7bf51fab14f9e6c33ffde067a5c7df2d7f81055d0ba331a840a33ba596cb45e782299f626367a928447a08480d41a3a1c9

memory/2840-33-0x000001E20DAA0000-0x000001E20DAA1000-memory.dmp

memory/2840-43-0x000001E20F780000-0x000001E20F790000-memory.dmp

memory/2840-42-0x000001E20F770000-0x000001E20F780000-memory.dmp

memory/2840-41-0x000001E20F760000-0x000001E20F770000-memory.dmp

memory/2840-40-0x000001E20F750000-0x000001E20F760000-memory.dmp

memory/2840-39-0x000001E20F740000-0x000001E20F750000-memory.dmp

memory/4056-47-0x0000018DB7690000-0x0000018DB7900000-memory.dmp

memory/2840-38-0x000001E20F730000-0x000001E20F740000-memory.dmp

memory/2840-37-0x000001E20F720000-0x000001E20F730000-memory.dmp

memory/2840-36-0x000001E20F710000-0x000001E20F720000-memory.dmp

memory/2840-35-0x000001E20F4A0000-0x000001E20F710000-memory.dmp

C:\ProgramData\Oracle\Java\.oracle_jre_usage\3903daac9bc4a3b7.timestamp

MD5 d41d8cd98f00b204e9800998ecf8427e
SHA1 da39a3ee5e6b4b0d3255bfef95601890afd80709
SHA256 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA512 cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

memory/4056-58-0x0000018DB7900000-0x0000018DB7910000-memory.dmp

memory/4056-62-0x0000018DB7920000-0x0000018DB7930000-memory.dmp

memory/4056-61-0x0000018DB7910000-0x0000018DB7920000-memory.dmp

memory/4056-67-0x0000018DB7940000-0x0000018DB7950000-memory.dmp

memory/4056-66-0x0000018DB7930000-0x0000018DB7940000-memory.dmp

memory/4056-69-0x0000018DB7950000-0x0000018DB7960000-memory.dmp

memory/4056-71-0x0000018DB7960000-0x0000018DB7970000-memory.dmp

memory/4056-72-0x0000018DB7970000-0x0000018DB7980000-memory.dmp

memory/4056-74-0x0000018DB7980000-0x0000018DB7990000-memory.dmp

memory/4056-75-0x0000018DB7670000-0x0000018DB7671000-memory.dmp

memory/4056-76-0x0000018DB7690000-0x0000018DB7900000-memory.dmp

memory/4056-77-0x0000018DB7900000-0x0000018DB7910000-memory.dmp

memory/4056-78-0x0000018DB7910000-0x0000018DB7920000-memory.dmp

memory/4056-79-0x0000018DB7920000-0x0000018DB7930000-memory.dmp

memory/4056-81-0x0000018DB7930000-0x0000018DB7940000-memory.dmp

memory/4056-82-0x0000018DB7940000-0x0000018DB7950000-memory.dmp

memory/4056-83-0x0000018DB7950000-0x0000018DB7960000-memory.dmp

memory/4056-84-0x0000018DB7960000-0x0000018DB7970000-memory.dmp

memory/4056-85-0x0000018DB7970000-0x0000018DB7980000-memory.dmp

memory/4056-86-0x0000018DB7980000-0x0000018DB7990000-memory.dmp