Malware Analysis Report

2024-10-19 07:06

Sample ID 231224-wpqfpsdfbj
Target UndertaleTrainer.exe
SHA256 b7d757263aac8d89154f7962550b795cca99e2df080d8bfdfbc3582b1a0d8d43
Tags
marsstealer default spyware 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

b7d757263aac8d89154f7962550b795cca99e2df080d8bfdfbc3582b1a0d8d43

Threat Level: Known bad

The file UndertaleTrainer.exe was found to be: Known bad.

Malicious Activity Summary

marsstealer default spyware stealer

Mars Stealer

Loads dropped DLL

Checks computer location settings

Executes dropped EXE

Reads user/profile data of web browsers

Enumerates physical storage devices

Program crash

Unsigned PE

Modifies registry class

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-12-24 18:06

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-24 18:06

Reported

2023-12-24 18:08

Platform

win7-20231129-en

Max time kernel

121s

Max time network

145s

Command Line

"C:\Users\Admin\AppData\Local\Temp\UndertaleTrainer.exe"

Signatures

Mars Stealer

stealer marsstealer

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Low\PVZQIE.exe N/A

Reads user/profile data of web browsers

spyware stealer

Enumerates physical storage devices

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Users\Admin\AppData\Local\Temp\Low\PVZQIE.exe

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000_CLASSES\Local Settings\MuiCache C:\Users\Admin\AppData\Local\Temp\Low\PVZQIE.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\UndertaleTrainer.exe

"C:\Users\Admin\AppData\Local\Temp\UndertaleTrainer.exe"

C:\Users\Admin\AppData\Local\Temp\Low\PVZQIE.exe

"C:\Users\Admin\AppData\Local\Temp\Low\PVZQIE.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2784 -s 564

Network

Country Destination Domain Proto
US 8.8.8.8:53 www.msk-post.com udp
RU 91.228.225.55:80 www.msk-post.com tcp
RU 91.228.225.55:443 www.msk-post.com tcp
US 8.8.8.8:53 apps.identrust.com udp
GB 96.17.179.184:80 apps.identrust.com tcp
US 8.8.8.8:53 www.microsoft.com udp

Files

memory/2948-0-0x0000000000ED0000-0x0000000000F42000-memory.dmp

memory/2948-1-0x0000000073F30000-0x000000007461E000-memory.dmp

memory/2784-12-0x0000000000400000-0x000000000043D000-memory.dmp

memory/2948-13-0x0000000073F30000-0x000000007461E000-memory.dmp

memory/2948-11-0x0000000000E60000-0x0000000000E9D000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\Low\PVZQIE.exe

MD5 b13a4bddff058d6c9c44d62ecf492563
SHA1 dcf173cf7a9ae1c9b28c92a13bca0b619dee3511
SHA256 ff90f644a5d0af130cf8d61d0908447a8953d3be58c0ecd8b23f03534df30e4c
SHA512 7c8611fd762dbd1b77788dc0950323adf751a1a881b855c8b8cf132f4b3515479c56789b1360a028d5704426f37fb4610effb79824c0bc0ea85f2a3d7c638a90

C:\Users\Admin\AppData\Local\Temp\Low\PVZQIE.exe

MD5 8cc76969b76e6cd21e2962bf4ec38834
SHA1 00f9793e7b740c91b043a5bee65a2e62cf7611bf
SHA256 b8acaa0830c9799d74fd1a78ce4e4051f2f85ffb1298f9d20eda63d21794173c
SHA512 b9c0f88766977249a3f0fc56c22953a314210d4c7e7ef209bd0c97c0b2e1badcb8c3d6e4b5cad6d7626d4b7c65380456b2a3d549dff7766f8e11f09bf0d1d87f

\Users\Admin\AppData\Local\Temp\Low\PVZQIE.exe

MD5 26a438749e676718c9213208686053f1
SHA1 e7916ca29fb1fdf459f8ec3a5b017c57cf168218
SHA256 62297c5b3b1a5cbea2177daa053eb3594fd37357f3aa80b177b472cf9c49b8ff
SHA512 98a4d1a1c67a59b9886c57bf4d69066fc388ecf6d18b2e3617767f625b4cf38f46eebd632b87b944a3bb53c8902d8a19d43266450a6d45f8b84d29a060028dd8

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

MD5 ac05d27423a85adc1622c714f2cb6184
SHA1 b0fe2b1abddb97837ea0195be70ab2ff14d43198
SHA256 c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d
SHA512 6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

C:\Users\Admin\AppData\LocalLow\Temp\TarC395.tmp

MD5 9c0c641c06238516f27941aa1166d427
SHA1 64cd549fb8cf014fcd9312aa7a5b023847b6c977
SHA256 4276af3669a141a59388bc56a87f6614d9a9bdddf560636c264219a7eb11256f
SHA512 936ed0c0b0a7ff8e606b1cc4175a1f9b3699748ccbba1c3aff96203033d2e9edabf090e5148370df42fbfc4e31d7229493706ff24f19ff42ff7bef74a6baad06

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\F0ACCF77CDCBFF39F6191887F6D2D357

MD5 02f496531fe2a8531f1f3bbcc4ca83dd
SHA1 d0f3f553e26fe892d9f2959f261cbc666726edf6
SHA256 ef0060913b0b9889c4f29c8492a9fbad10b56dde021dff49407a2e1d38bb246a
SHA512 9c7c292b4a05cfec89e34597f3f216aee0eb6539fec4edd561919e1148e37e9228291244005e43077daa36d1392bba60664294dc381965a8518c22e446ac3767

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\F0ACCF77CDCBFF39F6191887F6D2D357

MD5 a266bb7dcc38a562631361bbf61dd11b
SHA1 3b1efd3a66ea28b16697394703a72ca340a05bd5
SHA256 df545bf919a2439c36983b54cdfc903dfa4f37d3996d8d84b4c31eec6f3c163e
SHA512 0da8ef4f8f6ed3d16d2bc8eb816b9e6e1345dfe2d91160196c47e6149a1d6aedaafadcefd66acdea7f72dcf0832770192ceac15b0c559c4ccc2c0e5581d5aefc

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-24 18:06

Reported

2023-12-24 18:08

Platform

win10v2004-20231215-en

Max time kernel

147s

Max time network

156s

Command Line

"C:\Users\Admin\AppData\Local\Temp\UndertaleTrainer.exe"

Signatures

Mars Stealer

stealer marsstealer

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-1815711207-1844170477-3539718864-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\UndertaleTrainer.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\Adobe\.exe N/A

Reads user/profile data of web browsers

spyware stealer

Enumerates physical storage devices

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Users\Admin\AppData\Roaming\Adobe\.exe

Processes

C:\Users\Admin\AppData\Local\Temp\UndertaleTrainer.exe

"C:\Users\Admin\AppData\Local\Temp\UndertaleTrainer.exe"

C:\Users\Admin\AppData\Roaming\Adobe\.exe

"C:\Users\Admin\AppData\Roaming\Adobe\.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4552 -ip 4552

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4552 -s 1840

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 8.8.8.8:53 209.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.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 2.136.104.51.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 www.msk-post.com udp
RU 91.228.225.55:80 www.msk-post.com tcp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 114.110.16.96.in-addr.arpa udp
RU 91.228.225.55:443 www.msk-post.com tcp
US 8.8.8.8:53 32.169.19.2.in-addr.arpa udp
US 8.8.8.8:53 55.225.228.91.in-addr.arpa udp
US 8.8.8.8:53 193.179.17.96.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 146.78.124.51.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.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 8.8.8.8:53 180.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 21.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 104.241.123.92.in-addr.arpa udp
US 8.8.8.8:53 119.110.54.20.in-addr.arpa udp
US 8.8.8.8:53 178.223.142.52.in-addr.arpa udp
US 8.8.8.8:53 176.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 211.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 85.65.42.20.in-addr.arpa udp

Files

memory/4656-0-0x0000000075030000-0x00000000757E0000-memory.dmp

memory/4656-1-0x0000000000350000-0x00000000003C2000-memory.dmp

C:\Users\Admin\AppData\Roaming\Adobe\.exe

MD5 b13a4bddff058d6c9c44d62ecf492563
SHA1 dcf173cf7a9ae1c9b28c92a13bca0b619dee3511
SHA256 ff90f644a5d0af130cf8d61d0908447a8953d3be58c0ecd8b23f03534df30e4c
SHA512 7c8611fd762dbd1b77788dc0950323adf751a1a881b855c8b8cf132f4b3515479c56789b1360a028d5704426f37fb4610effb79824c0bc0ea85f2a3d7c638a90

C:\Users\Admin\AppData\Roaming\Adobe\.exe

MD5 76985eb01cfab94fedc8b5a88121a8a4
SHA1 dcc87d2a892fec0f9bc17a31ec58ca869a6904c7
SHA256 e1b206c20241adb99a689d28ab5c023e1aab192a05e8cea90f3a2de4727d3442
SHA512 7b7fc3237faada45f218a68b7cb536e7e478a8189361e091ea47a2c181d0c8e3e3968687403468f668d01c8502e2f47f86639fb2da2a4dba007151bff1868b55

C:\Users\Admin\AppData\Roaming\Adobe\.exe

MD5 e04486dc8097446e3ae8ef86f6ad9d11
SHA1 1f10e982bc422a164380669c0e27c42570c8bede
SHA256 d439fd6d159b03c18a483ff80c3f9010867b6ae55e05299d99c09567c8e55670
SHA512 dfb252abfddefd3a265e08c901ed98871c4ac183563e8f3458ab18d5f894b0d6affed077b0fb161261871b0271a341fdcdac0e40b0c48f210c676befae5edd6e

memory/4552-10-0x0000000000400000-0x000000000043D000-memory.dmp

memory/4656-12-0x0000000075030000-0x00000000757E0000-memory.dmp

memory/4552-20-0x0000000000400000-0x000000000043D000-memory.dmp