Malware Analysis Report

2024-10-18 23:08

Sample ID 240709-ltd85axejr
Target 118327932 AR_Feb_kazkhstan _2024-v2.exe
SHA256 2e2b22d80e84945f3149e24fb08a874e5293d4fbbff6d7df7c941fb47be9b4ff
Tags
guloader downloader 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: behavioral3

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral4

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

2e2b22d80e84945f3149e24fb08a874e5293d4fbbff6d7df7c941fb47be9b4ff

Threat Level: Known bad

The file 118327932 AR_Feb_kazkhstan _2024-v2.exe was found to be: Known bad.

Malicious Activity Summary

guloader downloader persistence

Guloader,Cloudeye

Loads dropped DLL

Adds Run key to start application

Legitimate hosting services abused for malware hosting/C2

Suspicious use of NtCreateThreadExHideFromDebugger

Suspicious use of SetThreadContext

Suspicious use of NtSetInformationThreadHideFromDebugger

Drops file in Windows directory

Program crash

Unsigned PE

Enumerates physical storage devices

NSIS installer

Suspicious behavior: MapViewOfSection

Suspicious use of WriteProcessMemory

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-07-09 09:49

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: behavioral1

Detonation Overview

Submitted

2024-07-09 09:49

Reported

2024-07-09 09:51

Platform

win7-20240705-en

Max time kernel

149s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\118327932 AR_Feb_kazkhstan _2024-v2.exe"

Signatures

Guloader,Cloudeye

downloader guloader

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\118327932 AR_Feb_kazkhstan _2024-v2.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-1385883288-3042840365-2734249351-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\Startup key = "C:\\Users\\Admin\\AppData\\Local\\Temp\\subfolder1\\Spektralanalyser.exe" C:\Program Files (x86)\windows mail\wab.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 NtCreateThreadExHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Program Files (x86)\windows mail\wab.exe N/A
N/A N/A C:\Program Files (x86)\windows mail\wab.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\118327932 AR_Feb_kazkhstan _2024-v2.exe N/A
N/A N/A C:\Program Files (x86)\windows mail\wab.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2044 set thread context of 2696 N/A C:\Users\Admin\AppData\Local\Temp\118327932 AR_Feb_kazkhstan _2024-v2.exe C:\Program Files (x86)\windows mail\wab.exe

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\Fonts\Apokryfens\Byggrynene.ini C:\Users\Admin\AppData\Local\Temp\118327932 AR_Feb_kazkhstan _2024-v2.exe N/A

Enumerates physical storage devices

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\118327932 AR_Feb_kazkhstan _2024-v2.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Program Files (x86)\windows mail\wab.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\118327932 AR_Feb_kazkhstan _2024-v2.exe

"C:\Users\Admin\AppData\Local\Temp\118327932 AR_Feb_kazkhstan _2024-v2.exe"

C:\Program Files (x86)\windows mail\wab.exe

"C:\Users\Admin\AppData\Local\Temp\118327932 AR_Feb_kazkhstan _2024-v2.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 drive.google.com udp
GB 172.217.16.238:443 drive.google.com tcp
US 8.8.8.8:53 c.pki.goog udp
GB 216.58.201.99:80 c.pki.goog tcp
US 8.8.8.8:53 o.pki.goog udp
GB 216.58.201.99:80 o.pki.goog tcp
US 8.8.8.8:53 drive.usercontent.google.com udp
GB 216.58.201.97:443 drive.usercontent.google.com tcp
US 8.8.8.8:53 learfo55ozj01.duckdns.org udp
US 192.169.69.26:29871 learfo55ozj01.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj01.duckdns.org tcp
US 8.8.8.8:53 learfo55ozj02.duckdns.org udp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 8.8.8.8:53 learfo55ozj01.duckdns.org udp
US 192.169.69.26:29872 learfo55ozj01.duckdns.org tcp
US 8.8.8.8:53 learfo55ozj02.duckdns.org udp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29871 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp
US 192.169.69.26:29872 learfo55ozj02.duckdns.org tcp

Files

\Users\Admin\AppData\Local\Temp\nst9CEC.tmp\System.dll

MD5 3f176d1ee13b0d7d6bd92e1c7a0b9bae
SHA1 fe582246792774c2c9dd15639ffa0aca90d6fd0b
SHA256 fa4ab1d6f79fd677433a31ada7806373a789d34328da46ccb0449bbf347bd73e
SHA512 0a69124819b7568d0dea4e9e85ce8fe61c7ba697c934e3a95e2dcfb9f252b1d9da7faf8774b6e8efd614885507acc94987733eba09a2f5e7098b774dfc8524b6

memory/2044-12-0x00000000775E1000-0x00000000776E2000-memory.dmp

memory/2044-13-0x00000000775E0000-0x0000000077789000-memory.dmp

memory/2696-14-0x00000000775E0000-0x0000000077789000-memory.dmp

memory/2696-16-0x0000000000900000-0x0000000001962000-memory.dmp

memory/2696-36-0x0000000001970000-0x00000000073C2000-memory.dmp

Analysis: behavioral2

Detonation Overview

Reported

0001-01-01 00:00

Command Line

N/A

Signatures

N/A

Processes

N/A

Network

N/A

Files

N/A

Analysis: behavioral3

Detonation Overview

Submitted

2024-07-09 09:49

Reported

2024-07-09 09:51

Platform

win7-20240704-en

Max time kernel

120s

Max time network

121s

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 2792 -s 224

Network

N/A

Files

N/A

Analysis: behavioral4

Detonation Overview

Submitted

2024-07-09 09:49

Reported

2024-07-09 09:51

Platform

win10v2004-20240704-en

Max time kernel

93s

Max time network

97s

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 1132 wrote to memory of 5052 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1132 wrote to memory of 5052 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1132 wrote to memory of 5052 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 432 -p 5052 -ip 5052

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 5052 -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 75.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 192.142.123.92.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp

Files

N/A