Malware Analysis Report

2024-12-06 03:27

Sample ID 241030-aawhhssflm
Target rTransferenciarealizada451236.exe
SHA256 8085c17ea9441ff19ee1d021408ce2b159bdf4d53704a9afd180e76033c74415
Tags
guloader discovery 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

8085c17ea9441ff19ee1d021408ce2b159bdf4d53704a9afd180e76033c74415

Threat Level: Known bad

The file rTransferenciarealizada451236.exe was found to be: Known bad.

Malicious Activity Summary

guloader discovery downloader

Guloader,Cloudeye

Guloader family

Loads dropped DLL

Legitimate hosting services abused for malware hosting/C2

Suspicious use of NtSetInformationThreadHideFromDebugger

Suspicious use of NtCreateThreadExHideFromDebugger

Suspicious use of SetThreadContext

Drops file in Program Files directory

Drops file in Windows directory

System Location Discovery: System Language Discovery

Enumerates physical storage devices

Unsigned PE

Program crash

NSIS installer

Suspicious use of WriteProcessMemory

Suspicious behavior: MapViewOfSection

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-10-30 00:01

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

2024-10-30 00:01

Reported

2024-10-30 00:03

Platform

win10v2004-20241007-en

Max time kernel

149s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe"

Signatures

Guloader family

guloader

Guloader,Cloudeye

downloader guloader

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:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2028 set thread context of 984 N/A C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe

Drops file in Program Files directory

Description Indicator Process Target
File opened for modification C:\Program Files (x86)\Common Files\Reoil.mul C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\resources\stenhjsplanternes\fordreves.ini C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe N/A
File opened for modification C:\Windows\Fonts\karrooers.ini C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe N/A
File opened for modification C:\Windows\Fonts\brunsttiderne.tri C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe N/A
File opened for modification C:\Windows\Fonts\Spodium39.int C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe N/A
File opened for modification C:\Windows\Belringernes\Dermatophony.ini C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe N/A
File opened for modification C:\Windows\resources\nringsmiddelet.ini C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe 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\rTransferenciarealizada451236.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe

"C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe"

C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe

"C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 140.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 150.171.28.10:443 g.bing.com tcp
US 8.8.8.8:53 10.28.171.150.in-addr.arpa udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 drive.google.com udp
GB 142.250.179.238:443 drive.google.com tcp
US 8.8.8.8:53 c.pki.goog udp
US 8.8.8.8:53 238.179.250.142.in-addr.arpa udp
US 8.8.8.8:53 3.180.250.142.in-addr.arpa udp
GB 142.250.180.3:80 c.pki.goog tcp
US 8.8.8.8:53 o.pki.goog udp
GB 142.250.180.3:80 o.pki.goog tcp
US 8.8.8.8:53 drive.usercontent.google.com udp
GB 142.250.187.193:443 drive.usercontent.google.com tcp
US 8.8.8.8:53 193.187.250.142.in-addr.arpa udp
US 8.8.8.8:53 53.210.109.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 139.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 30.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 udp

Files

C:\Users\Admin\AppData\Local\Temp\nsf9396.tmp\System.dll

MD5 c9473cb90d79a374b2ba6040ca16e45c
SHA1 ab95b54f12796dce57210d65f05124a6ed81234a
SHA256 b80a5cba69d1853ed5979b0ca0352437bf368a5cfb86cb4528edadd410e11352
SHA512 eafe7d5894622bc21f663bca4dd594392ee0f5b29270b6b56b0187093d6a3a103545464ff6398ad32d2cf15dab79b1f133218ba9ba337ddc01330b5ada804d7b

memory/2028-18-0x0000000003250000-0x0000000005353000-memory.dmp

memory/2028-19-0x0000000003250000-0x0000000005353000-memory.dmp

memory/2028-20-0x0000000077BD1000-0x0000000077CF1000-memory.dmp

memory/2028-21-0x0000000010004000-0x0000000010005000-memory.dmp

memory/2028-22-0x0000000003250000-0x0000000005353000-memory.dmp

memory/984-23-0x0000000000400000-0x0000000001654000-memory.dmp

memory/984-24-0x0000000001660000-0x0000000003763000-memory.dmp

memory/984-28-0x0000000000400000-0x0000000001654000-memory.dmp

memory/984-35-0x0000000001660000-0x0000000003763000-memory.dmp

memory/984-39-0x0000000000400000-0x0000000001654000-memory.dmp

memory/984-40-0x0000000077BD1000-0x0000000077CF1000-memory.dmp

memory/984-41-0x0000000000400000-0x0000000001654000-memory.dmp

memory/984-42-0x0000000000400000-0x0000000001654000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2024-10-30 00:01

Reported

2024-10-30 00:03

Platform

win7-20240903-en

Max time kernel

122s

Max time network

123s

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

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\rundll32.exe N/A

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 1932 -s 224

Network

N/A

Files

N/A

Analysis: behavioral4

Detonation Overview

Submitted

2024-10-30 00:01

Reported

2024-10-30 00:03

Platform

win10v2004-20241007-en

Max time kernel

150s

Max time network

151s

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

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 840 wrote to memory of 1600 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 840 wrote to memory of 1600 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 840 wrote to memory of 1600 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 412 -p 1600 -ip 1600

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1600 -s 612

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 69.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 74.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 53.210.109.20.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 10.28.171.150.in-addr.arpa udp
US 8.8.8.8:53 208.143.182.52.in-addr.arpa udp

Files

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-10-30 00:01

Reported

2024-10-30 00:03

Platform

win7-20240903-en

Max time kernel

141s

Max time network

137s

Command Line

"C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe"

Signatures

Guloader family

guloader

Guloader,Cloudeye

downloader guloader

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:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1832 set thread context of 2888 N/A C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe

Drops file in Program Files directory

Description Indicator Process Target
File opened for modification C:\Program Files (x86)\Common Files\Reoil.mul C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\Fonts\karrooers.ini C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe N/A
File opened for modification C:\Windows\Fonts\brunsttiderne.tri C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe N/A
File opened for modification C:\Windows\Fonts\Spodium39.int C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe N/A
File opened for modification C:\Windows\Belringernes\Dermatophony.ini C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe N/A
File opened for modification C:\Windows\resources\nringsmiddelet.ini C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe N/A
File opened for modification C:\Windows\resources\stenhjsplanternes\fordreves.ini C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe 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\rTransferenciarealizada451236.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe

"C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe"

C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe

"C:\Users\Admin\AppData\Local\Temp\rTransferenciarealizada451236.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 drive.google.com udp
GB 142.250.179.238:443 drive.google.com tcp
US 8.8.8.8:53 c.pki.goog udp
GB 142.250.179.227:80 c.pki.goog tcp
US 8.8.8.8:53 o.pki.goog udp
GB 142.250.180.3:80 o.pki.goog tcp
US 8.8.8.8:53 drive.usercontent.google.com udp
GB 142.250.187.193:443 drive.usercontent.google.com tcp
US 8.8.8.8:53 crl.microsoft.com udp
GB 2.18.190.73:80 crl.microsoft.com tcp

Files

\Users\Admin\AppData\Local\Temp\nsjB5F8.tmp\System.dll

MD5 c9473cb90d79a374b2ba6040ca16e45c
SHA1 ab95b54f12796dce57210d65f05124a6ed81234a
SHA256 b80a5cba69d1853ed5979b0ca0352437bf368a5cfb86cb4528edadd410e11352
SHA512 eafe7d5894622bc21f663bca4dd594392ee0f5b29270b6b56b0187093d6a3a103545464ff6398ad32d2cf15dab79b1f133218ba9ba337ddc01330b5ada804d7b

memory/1832-20-0x00000000034C0000-0x00000000055C3000-memory.dmp

memory/1832-22-0x0000000077A00000-0x0000000077BA9000-memory.dmp

memory/1832-21-0x0000000077A01000-0x0000000077B02000-memory.dmp

memory/1832-24-0x00000000034C0000-0x00000000055C3000-memory.dmp

memory/1832-23-0x0000000077BF0000-0x0000000077CC6000-memory.dmp

memory/1832-25-0x00000000034C0000-0x00000000055C3000-memory.dmp

memory/2888-26-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2888-27-0x0000000077A00000-0x0000000077BA9000-memory.dmp

memory/2888-47-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2888-49-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2888-48-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2888-50-0x0000000000400000-0x0000000001462000-memory.dmp