Malware Analysis Report

2024-10-18 23:09

Sample ID 240521-p5r6xaee58
Target Borgerreprsentants.exe
SHA256 9e45db06cc8ee275f4fd1855b7c8c57f4b2fc85d8f58512076cce9189230c475
Tags
guloader downloader
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: behavioral3

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral4

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

9e45db06cc8ee275f4fd1855b7c8c57f4b2fc85d8f58512076cce9189230c475

Threat Level: Known bad

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

Malicious Activity Summary

guloader downloader

Guloader,Cloudeye

Loads dropped DLL

Legitimate hosting services abused for malware hosting/C2

Suspicious use of SetThreadContext

Suspicious use of NtSetInformationThreadHideFromDebugger

Drops file in Program Files directory

Drops file in Windows directory

Enumerates physical storage devices

Unsigned PE

Program crash

NSIS installer

Suspicious use of WriteProcessMemory

Suspicious behavior: MapViewOfSection

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-21 12:55

Signatures

Unsigned PE

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

NSIS installer

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-21 12:55

Reported

2024-05-21 12:57

Platform

win10v2004-20240508-en

Max time kernel

149s

Max time network

150s

Command Line

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

Signatures

Guloader,Cloudeye

downloader guloader

Loads dropped DLL

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

Legitimate hosting services abused for malware hosting/C2

Description Indicator Process Target
N/A drive.google.com N/A N/A
N/A drive.google.com N/A N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

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

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 3572 set thread context of 4216 N/A C:\Users\Admin\AppData\Local\Temp\Borgerreprsentants.exe C:\Users\Admin\AppData\Local\Temp\Borgerreprsentants.exe

Drops file in Program Files directory

Description Indicator Process Target
File opened for modification C:\Program Files (x86)\konvoluterer\Forsikringsinspektrer.ini C:\Users\Admin\AppData\Local\Temp\Borgerreprsentants.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\mycelian\sempitern.ini C:\Users\Admin\AppData\Local\Temp\Borgerreprsentants.exe N/A

Enumerates physical storage devices

Suspicious behavior: MapViewOfSection

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

Processes

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

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

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

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

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 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 79.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 73.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
NL 23.62.61.99:443 www.bing.com tcp
US 8.8.8.8:53 99.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 drive.google.com udp
GB 142.250.187.238:443 drive.google.com tcp
US 8.8.8.8:53 238.187.250.142.in-addr.arpa udp
US 8.8.8.8:53 drive.usercontent.google.com udp
GB 142.250.179.225:443 drive.usercontent.google.com tcp
US 8.8.8.8:53 225.179.250.142.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 28.143.109.104.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa 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 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 8.179.89.13.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\nsj4393.tmp\System.dll

MD5 b8992e497d57001ddf100f9c397fcef5
SHA1 e26ddf101a2ec5027975d2909306457c6f61cfbd
SHA256 98bcd1dd88642f4dd36a300c76ebb1ddfbbbc5bfc7e3b6d7435dc6d6e030c13b
SHA512 8823b1904dccfaf031068102cb1def7958a057f49ff369f0e061f1b4db2090021aa620bb8442a2a6ac9355bb74ee54371dc2599c20dc723755a46ede81533a3c

memory/3572-32-0x0000000004A10000-0x00000000063D8000-memory.dmp

memory/3572-33-0x00000000770F1000-0x0000000077211000-memory.dmp

memory/3572-34-0x0000000010004000-0x0000000010005000-memory.dmp

memory/4216-35-0x0000000000400000-0x0000000001654000-memory.dmp

memory/4216-36-0x0000000001660000-0x0000000003028000-memory.dmp

memory/3572-37-0x0000000004A10000-0x00000000063D8000-memory.dmp

memory/4216-38-0x0000000077178000-0x0000000077179000-memory.dmp

memory/4216-40-0x0000000077195000-0x0000000077196000-memory.dmp

memory/4216-39-0x0000000000400000-0x0000000001654000-memory.dmp

memory/4216-53-0x0000000001660000-0x0000000003028000-memory.dmp

memory/4216-55-0x00000000770F1000-0x0000000077211000-memory.dmp

memory/3572-60-0x0000000004A10000-0x00000000063D8000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2024-05-21 12:55

Reported

2024-05-21 12:57

Platform

win7-20240508-en

Max time kernel

122s

Max time network

122s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1

Signatures

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2972 -s 224

Network

N/A

Files

N/A

Analysis: behavioral4

Detonation Overview

Submitted

2024-05-21 12:55

Reported

2024-05-21 12:57

Platform

win10v2004-20240426-en

Max time kernel

129s

Max time network

98s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1

Signatures

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Windows\SysWOW64\rundll32.exe

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2428 wrote to memory of 3020 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2428 wrote to memory of 3020 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2428 wrote to memory of 3020 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 3020 -ip 3020

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3020 -s 612

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 79.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
NL 23.62.61.97:443 www.bing.com tcp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 97.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 2.181.190.20.in-addr.arpa udp
NL 23.62.61.97:443 www.bing.com tcp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.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

Files

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-21 12:55

Reported

2024-05-21 12:57

Platform

win7-20240508-en

Max time kernel

146s

Max time network

147s

Command Line

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

Signatures

Guloader,Cloudeye

downloader guloader

Loads dropped DLL

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

Legitimate hosting services abused for malware hosting/C2

Description Indicator Process Target
N/A drive.google.com N/A N/A
N/A drive.google.com N/A N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

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

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1544 set thread context of 2312 N/A C:\Users\Admin\AppData\Local\Temp\Borgerreprsentants.exe C:\Users\Admin\AppData\Local\Temp\Borgerreprsentants.exe

Drops file in Program Files directory

Description Indicator Process Target
File opened for modification C:\Program Files (x86)\konvoluterer\Forsikringsinspektrer.ini C:\Users\Admin\AppData\Local\Temp\Borgerreprsentants.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\mycelian\sempitern.ini C:\Users\Admin\AppData\Local\Temp\Borgerreprsentants.exe N/A

Enumerates physical storage devices

Suspicious behavior: MapViewOfSection

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

Processes

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

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

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 drive.google.com udp
GB 142.250.187.238:443 drive.google.com tcp
US 8.8.8.8:53 drive.usercontent.google.com udp
GB 142.250.179.225:443 drive.usercontent.google.com tcp

Files

\Users\Admin\AppData\Local\Temp\nst2973.tmp\System.dll

MD5 b8992e497d57001ddf100f9c397fcef5
SHA1 e26ddf101a2ec5027975d2909306457c6f61cfbd
SHA256 98bcd1dd88642f4dd36a300c76ebb1ddfbbbc5bfc7e3b6d7435dc6d6e030c13b
SHA512 8823b1904dccfaf031068102cb1def7958a057f49ff369f0e061f1b4db2090021aa620bb8442a2a6ac9355bb74ee54371dc2599c20dc723755a46ede81533a3c

memory/1544-33-0x0000000003640000-0x0000000005008000-memory.dmp

memory/1544-34-0x0000000077591000-0x0000000077692000-memory.dmp

memory/1544-35-0x0000000077590000-0x0000000077739000-memory.dmp

memory/2312-37-0x0000000077590000-0x0000000077739000-memory.dmp

memory/2312-36-0x0000000000400000-0x0000000001462000-memory.dmp

memory/1544-38-0x0000000003640000-0x0000000005008000-memory.dmp

memory/2312-39-0x0000000000400000-0x0000000001462000-memory.dmp

memory/1544-73-0x0000000003640000-0x0000000005008000-memory.dmp