Malware Analysis Report

2025-06-16 03:44

Sample ID 240324-dx4n7abf9x
Target af7981a2ac42f21ac4820f14bbb294b2.bin
SHA256 4b9ac98894b35f3a86ba110c99abb5ac6842462ed6d07a6a6ebd1ce274792665
Tags
guloader downloader persistence
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

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: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

4b9ac98894b35f3a86ba110c99abb5ac6842462ed6d07a6a6ebd1ce274792665

Threat Level: Known bad

The file af7981a2ac42f21ac4820f14bbb294b2.bin was found to be: Known bad.

Malicious Activity Summary

guloader downloader persistence

Guloader,Cloudeye

Loads dropped DLL

Adds Run key to start application

Suspicious use of NtSetInformationThreadHideFromDebugger

Suspicious use of SetThreadContext

Unsigned PE

Program crash

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Suspicious behavior: MapViewOfSection

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-03-24 03:24

Signatures

Unsigned PE

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

Analysis: behavioral3

Detonation Overview

Submitted

2024-03-24 03:24

Reported

2024-03-24 03:26

Platform

win7-20240221-en

Max time kernel

121s

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 3004 -s 220

Network

N/A

Files

N/A

Analysis: behavioral4

Detonation Overview

Submitted

2024-03-24 03:24

Reported

2024-03-24 03:26

Platform

win10v2004-20240226-en

Max time kernel

136s

Max time network

131s

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 3872 wrote to memory of 1704 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3872 wrote to memory of 1704 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3872 wrote to memory of 1704 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 460 -p 1704 -ip 1704

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1704 -s 612

Network

Country Destination Domain Proto
US 8.8.8.8:53 2.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 194.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 180.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 31.243.111.52.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 8.8.8.8:53 200.197.79.204.in-addr.arpa udp

Files

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-24 03:24

Reported

2024-03-24 03:26

Platform

win7-20231129-en

Max time kernel

149s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\8e00826760dc9f5c25a3b538ba87d656c76b645135abf11bd55f5de81fc4273c.exe"

Signatures

Guloader,Cloudeye

downloader guloader

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\plat = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Nathimlen\\Styrke.exe" 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\8e00826760dc9f5c25a3b538ba87d656c76b645135abf11bd55f5de81fc4273c.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 2004 set thread context of 2536 N/A C:\Users\Admin\AppData\Local\Temp\8e00826760dc9f5c25a3b538ba87d656c76b645135abf11bd55f5de81fc4273c.exe C:\Program Files (x86)\windows mail\wab.exe

Enumerates physical storage devices

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\8e00826760dc9f5c25a3b538ba87d656c76b645135abf11bd55f5de81fc4273c.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\8e00826760dc9f5c25a3b538ba87d656c76b645135abf11bd55f5de81fc4273c.exe

"C:\Users\Admin\AppData\Local\Temp\8e00826760dc9f5c25a3b538ba87d656c76b645135abf11bd55f5de81fc4273c.exe"

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

"C:\Users\Admin\AppData\Local\Temp\8e00826760dc9f5c25a3b538ba87d656c76b645135abf11bd55f5de81fc4273c.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 adamkiddoo.com udp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp
US 50.87.142.20:443 adamkiddoo.com tcp

Files

\Users\Admin\AppData\Local\Temp\nsy210A.tmp\System.dll

MD5 75ed96254fbf894e42058062b4b4f0d1
SHA1 996503f1383b49021eb3427bc28d13b5bbd11977
SHA256 a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7
SHA512 58174896db81d481947b8745dafe3a02c150f3938bb4543256e8cce1145154e016d481df9fe68dac6d48407c62cbe20753320ebd5fe5e84806d07ce78e0eb0c4

memory/2004-10-0x0000000004040000-0x0000000004F70000-memory.dmp

memory/2004-11-0x00000000770C0000-0x0000000077269000-memory.dmp

memory/2004-12-0x00000000772B0000-0x0000000077386000-memory.dmp

memory/2004-13-0x0000000074B20000-0x0000000074B26000-memory.dmp

memory/2536-14-0x00000000009D0000-0x0000000001900000-memory.dmp

memory/2536-16-0x00000000770C0000-0x0000000077269000-memory.dmp

memory/2004-15-0x0000000004040000-0x0000000004F70000-memory.dmp

memory/2536-17-0x00000000772E6000-0x00000000772E7000-memory.dmp

memory/2536-19-0x00000000772B0000-0x0000000077386000-memory.dmp

memory/2536-20-0x0000000000400000-0x0000000000581000-memory.dmp

memory/2536-21-0x00000000009D0000-0x0000000001900000-memory.dmp

memory/2536-23-0x00000000770C0000-0x0000000077269000-memory.dmp

memory/2004-28-0x0000000004040000-0x0000000004F70000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-24 03:24

Reported

2024-03-24 03:26

Platform

win10v2004-20240226-en

Max time kernel

3s

Max time network

55s

Command Line

"C:\Users\Admin\AppData\Local\Temp\8e00826760dc9f5c25a3b538ba87d656c76b645135abf11bd55f5de81fc4273c.exe"

Signatures

Guloader,Cloudeye

downloader guloader

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\8e00826760dc9f5c25a3b538ba87d656c76b645135abf11bd55f5de81fc4273c.exe

"C:\Users\Admin\AppData\Local\Temp\8e00826760dc9f5c25a3b538ba87d656c76b645135abf11bd55f5de81fc4273c.exe"

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

"C:\Users\Admin\AppData\Local\Temp\8e00826760dc9f5c25a3b538ba87d656c76b645135abf11bd55f5de81fc4273c.exe"

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

"C:\Users\Admin\AppData\Local\Temp\8e00826760dc9f5c25a3b538ba87d656c76b645135abf11bd55f5de81fc4273c.exe"

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

"C:\Users\Admin\AppData\Local\Temp\8e00826760dc9f5c25a3b538ba87d656c76b645135abf11bd55f5de81fc4273c.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 g.bing.com udp
US 204.79.197.200:443 g.bing.com tcp
US 8.8.8.8:53 71.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 194.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.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 adamkiddoo.com udp
US 50.87.142.20:443 adamkiddoo.com tcp
US 8.8.8.8:53 20.142.87.50.in-addr.arpa udp
US 8.8.8.8:53 40.13.222.173.in-addr.arpa udp
US 8.8.8.8:53 193.179.17.96.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\nsy441F.tmp\System.dll

MD5 75ed96254fbf894e42058062b4b4f0d1
SHA1 996503f1383b49021eb3427bc28d13b5bbd11977
SHA256 a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7
SHA512 58174896db81d481947b8745dafe3a02c150f3938bb4543256e8cce1145154e016d481df9fe68dac6d48407c62cbe20753320ebd5fe5e84806d07ce78e0eb0c4

memory/380-9-0x0000000005410000-0x0000000006340000-memory.dmp

memory/380-10-0x0000000077401000-0x0000000077521000-memory.dmp

memory/380-11-0x0000000074260000-0x0000000074266000-memory.dmp

memory/3096-12-0x0000000001100000-0x0000000002030000-memory.dmp

memory/380-13-0x0000000005410000-0x0000000006340000-memory.dmp

memory/3096-15-0x0000000077488000-0x0000000077489000-memory.dmp

memory/3096-16-0x0000000077401000-0x0000000077521000-memory.dmp

memory/3096-25-0x0000000000400000-0x00000000005E4000-memory.dmp

memory/3096-26-0x0000000000400000-0x00000000005E4000-memory.dmp

memory/3096-28-0x0000000000400000-0x00000000005E4000-memory.dmp

memory/380-27-0x0000000005410000-0x0000000006340000-memory.dmp

memory/3096-29-0x0000000000400000-0x00000000005E4000-memory.dmp

memory/3096-23-0x0000000001100000-0x0000000002030000-memory.dmp

memory/3096-30-0x0000000000400000-0x00000000005E4000-memory.dmp

memory/3096-24-0x0000000077401000-0x0000000077521000-memory.dmp

memory/3096-31-0x0000000000400000-0x00000000005E4000-memory.dmp

memory/3096-33-0x0000000000400000-0x00000000005E4000-memory.dmp

memory/3096-32-0x0000000000400000-0x00000000005E4000-memory.dmp

memory/3096-34-0x0000000000400000-0x00000000005E4000-memory.dmp

memory/3096-35-0x0000000000400000-0x00000000005E4000-memory.dmp

memory/3096-36-0x0000000000400000-0x00000000005E4000-memory.dmp

memory/3096-38-0x0000000000400000-0x00000000005E4000-memory.dmp

memory/3096-37-0x0000000000400000-0x00000000005E4000-memory.dmp