Malware Analysis Report

2024-11-16 13:28

Sample ID 240728-bctblsydpl
Target 28e3fb0f8918c048ca6a45a9757344f0N.exe
SHA256 4b644a0cbd0addb992f9fe65f22ef27f72e3a3e62e09f4640a02f981a2551c29
Tags
upx urelas discovery trojan
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

4b644a0cbd0addb992f9fe65f22ef27f72e3a3e62e09f4640a02f981a2551c29

Threat Level: Known bad

The file 28e3fb0f8918c048ca6a45a9757344f0N.exe was found to be: Known bad.

Malicious Activity Summary

upx urelas discovery trojan

Urelas

Urelas family

Loads dropped DLL

Checks computer location settings

Executes dropped EXE

Deletes itself

UPX packed file

Unsigned PE

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-07-28 01:00

Signatures

Urelas family

urelas

UPX packed file

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

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-07-28 01:00

Reported

2024-07-28 04:40

Platform

win7-20240704-en

Max time kernel

90s

Max time network

93s

Command Line

"C:\Users\Admin\AppData\Local\Temp\28e3fb0f8918c048ca6a45a9757344f0N.exe"

Signatures

Urelas

trojan urelas

Deletes itself

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\cmd.exe N/A

Executes dropped EXE

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

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\28e3fb0f8918c048ca6a45a9757344f0N.exe N/A

UPX packed file

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

Enumerates physical storage devices

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\28e3fb0f8918c048ca6a45a9757344f0N.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\huter.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\cmd.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\28e3fb0f8918c048ca6a45a9757344f0N.exe

"C:\Users\Admin\AppData\Local\Temp\28e3fb0f8918c048ca6a45a9757344f0N.exe"

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

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

C:\Windows\SysWOW64\cmd.exe

cmd /c ""C:\Users\Admin\AppData\Local\Temp\sanfdr.bat" "

Network

Country Destination Domain Proto
KR 112.175.88.209:11120 tcp
KR 112.175.88.208:11150 tcp
KR 112.175.88.209:11170 tcp
KR 112.175.88.207:11150 tcp

Files

memory/2292-0-0x0000000000400000-0x0000000000431000-memory.dmp

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

MD5 62924b2bf0bc53bd636e67d0ba41bed7
SHA1 bbb04c61c0170bf662b61fc766ba139eb7e56326
SHA256 e2fb6f6184ad65be8efe575cef01b16925a69c551753cd393671eca6ae1ecbf1
SHA512 dbb1ea298cff577b21db37e7b3ea98b6cf7765541794e469590ab78d084dd635fe3cd4dc5e35722289089079918343d1f94db975bce0cea91b4aed0380493ea2

memory/2292-18-0x0000000000400000-0x0000000000431000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\sanfdr.bat

MD5 781ea12e9401bfcfe3102c74466e1782
SHA1 73df23cdb01e1345be2a8ddc1290dab4c0985af6
SHA256 e9a894896bc9a820d7759f593cae26dbe3769e21a1cccdbeea95ce826b34db48
SHA512 9008c1f2538ef9c38847429255067ee06208fc8de0a144b436a87da68e24576d05865b33017f2893e6a68d3887bd23255774f9d4b19b370a80e2d9770ec09e2d

memory/548-10-0x0000000000400000-0x0000000000431000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\golfinfo.ini

MD5 a01dba4c45102fc15292fd5591166536
SHA1 d96191c30e0f09439d8547f4ededbf6726ccd54b
SHA256 cc2f9d3db04690b746c18d40c70f8dbc9ca18520b68619d9ccaeac500af98904
SHA512 277a86f44c2648668205cd6c3c9f83feef147a5ad10839a130713eee9c931c26088d4dd95798b1d0e69f3439239abdee79d37656ad3963147a878a9433d60d32

memory/548-21-0x0000000000400000-0x0000000000431000-memory.dmp

memory/548-23-0x0000000000400000-0x0000000000431000-memory.dmp

memory/548-29-0x0000000000400000-0x0000000000431000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-07-28 01:00

Reported

2024-07-28 04:40

Platform

win10v2004-20240709-en

Max time kernel

105s

Max time network

111s

Command Line

"C:\Users\Admin\AppData\Local\Temp\28e3fb0f8918c048ca6a45a9757344f0N.exe"

Signatures

Urelas

trojan urelas

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-1750093773-264148664-1320403265-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\28e3fb0f8918c048ca6a45a9757344f0N.exe N/A

Executes dropped EXE

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

UPX packed file

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

Enumerates physical storage devices

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\28e3fb0f8918c048ca6a45a9757344f0N.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\huter.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\cmd.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\28e3fb0f8918c048ca6a45a9757344f0N.exe

"C:\Users\Admin\AppData\Local\Temp\28e3fb0f8918c048ca6a45a9757344f0N.exe"

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

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

C:\Windows\SysWOW64\cmd.exe

C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\sanfdr.bat" "

Network

Country Destination Domain Proto
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 75.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
KR 112.175.88.209:11120 tcp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
KR 112.175.88.208:11150 tcp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
KR 112.175.88.209:11170 tcp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
KR 112.175.88.207:11150 tcp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp

Files

memory/5056-0-0x0000000000400000-0x0000000000431000-memory.dmp

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

MD5 8d2b763cb996b36665ba69fd9f28a66c
SHA1 7a577fb2264a1828acadc8adf2a44b181b55357d
SHA256 bd30916c5612618253882aa9a26dccbb0fe583f360e1b4cfd5f9cd36deb3a541
SHA512 22cdf8ea438e3fee7598ff947940286a2f2da759e796ce62759f1a06a9bcbcf7ccbc5570866533fa363c110359347d44e98c5a6a15d62b3bef7ce8552f7ed116

memory/5020-14-0x0000000000400000-0x0000000000431000-memory.dmp

memory/5056-17-0x0000000000400000-0x0000000000431000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\sanfdr.bat

MD5 781ea12e9401bfcfe3102c74466e1782
SHA1 73df23cdb01e1345be2a8ddc1290dab4c0985af6
SHA256 e9a894896bc9a820d7759f593cae26dbe3769e21a1cccdbeea95ce826b34db48
SHA512 9008c1f2538ef9c38847429255067ee06208fc8de0a144b436a87da68e24576d05865b33017f2893e6a68d3887bd23255774f9d4b19b370a80e2d9770ec09e2d

C:\Users\Admin\AppData\Local\Temp\golfinfo.ini

MD5 a01dba4c45102fc15292fd5591166536
SHA1 d96191c30e0f09439d8547f4ededbf6726ccd54b
SHA256 cc2f9d3db04690b746c18d40c70f8dbc9ca18520b68619d9ccaeac500af98904
SHA512 277a86f44c2648668205cd6c3c9f83feef147a5ad10839a130713eee9c931c26088d4dd95798b1d0e69f3439239abdee79d37656ad3963147a878a9433d60d32

memory/5020-20-0x0000000000400000-0x0000000000431000-memory.dmp

memory/5020-22-0x0000000000400000-0x0000000000431000-memory.dmp

memory/5020-28-0x0000000000400000-0x0000000000431000-memory.dmp