Malware Analysis Report

2024-11-13 17:38

Sample ID 241107-dve8tawraj
Target d539aa17bfa95bc25c81308a99a1c834cb28ad23f1ce8bc3715066471bd5d0f7.exe
SHA256 d539aa17bfa95bc25c81308a99a1c834cb28ad23f1ce8bc3715066471bd5d0f7
Tags
discovery guloader downloader
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

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: behavioral3

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

d539aa17bfa95bc25c81308a99a1c834cb28ad23f1ce8bc3715066471bd5d0f7

Threat Level: Known bad

The file d539aa17bfa95bc25c81308a99a1c834cb28ad23f1ce8bc3715066471bd5d0f7.exe was found to be: Known bad.

Malicious Activity Summary

discovery guloader downloader

Guloader,Cloudeye

Guloader family

Loads dropped DLL

Drops file in Windows directory

Drops file in Program Files directory

Program crash

System Location Discovery: System Language Discovery

Unsigned PE

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-07 03:19

Signatures

Unsigned PE

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

Analysis: behavioral4

Detonation Overview

Submitted

2024-11-07 03:19

Reported

2024-11-07 03:22

Platform

win10v2004-20241007-en

Max time kernel

148s

Max time network

149s

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 464 wrote to memory of 3916 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 464 wrote to memory of 3916 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 464 wrote to memory of 3916 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 404 -p 3916 -ip 3916

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3916 -s 616

Network

Country Destination Domain Proto
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 17.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 212.20.149.52.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp

Files

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-07 03:19

Reported

2024-11-07 03:22

Platform

win7-20241010-en

Max time kernel

20s

Max time network

18s

Command Line

"C:\Users\Admin\AppData\Local\Temp\d539aa17bfa95bc25c81308a99a1c834cb28ad23f1ce8bc3715066471bd5d0f7.exe"

Signatures

Drops file in Program Files directory

Description Indicator Process Target
File opened for modification C:\Program Files (x86)\Common Files\customization.rom C:\Users\Admin\AppData\Local\Temp\d539aa17bfa95bc25c81308a99a1c834cb28ad23f1ce8bc3715066471bd5d0f7.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\resources\primy.ini C:\Users\Admin\AppData\Local\Temp\d539aa17bfa95bc25c81308a99a1c834cb28ad23f1ce8bc3715066471bd5d0f7.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\d539aa17bfa95bc25c81308a99a1c834cb28ad23f1ce8bc3715066471bd5d0f7.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\d539aa17bfa95bc25c81308a99a1c834cb28ad23f1ce8bc3715066471bd5d0f7.exe

"C:\Users\Admin\AppData\Local\Temp\d539aa17bfa95bc25c81308a99a1c834cb28ad23f1ce8bc3715066471bd5d0f7.exe"

Network

N/A

Files

C:\Windows\Resources\primy.ini

MD5 76d9175a3db7407eb0bfc3c07ddcd9d2
SHA1 72071127e9a44935cb02650ed715ccaf6a8f8418
SHA256 1f7119996dd17af05bf05e497104715bbbc3909676afa4329fbd59502be1a1a5
SHA512 5032dab71e70a4bd1dad2f5cf9380e0097be7993bc46886fed6e4bdd8781f2b10d31338d90d0dc5804665bda2cbfe93f1172250e1a8ab7c9118baf9f156e3c69

\Users\Admin\AppData\Local\Temp\nse3AEF.tmp\System.dll

MD5 192639861e3dc2dc5c08bb8f8c7260d5
SHA1 58d30e460609e22fa0098bc27d928b689ef9af78
SHA256 23d618a0293c78ce00f7c6e6dd8b8923621da7dd1f63a070163ef4c0ec3033d6
SHA512 6e573d8b2ef6ed719e271fd0b2fd9cd451f61fc9a9459330108d6d7a65a0f64016303318cad787aa1d5334ba670d8f1c7c13074e1be550b4a316963ecc465cdc

memory/2304-23239-0x00000000028F0000-0x00000000059D2000-memory.dmp

memory/2304-23240-0x00000000028F0000-0x00000000059D2000-memory.dmp

memory/2304-23243-0x00000000028F0000-0x00000000059D2000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-07 03:19

Reported

2024-11-07 03:22

Platform

win10v2004-20241007-en

Max time kernel

11s

Max time network

145s

Command Line

"C:\Users\Admin\AppData\Local\Temp\d539aa17bfa95bc25c81308a99a1c834cb28ad23f1ce8bc3715066471bd5d0f7.exe"

Signatures

Guloader family

guloader

Guloader,Cloudeye

downloader guloader

Drops file in Program Files directory

Description Indicator Process Target
File opened for modification C:\Program Files (x86)\Common Files\customization.rom C:\Users\Admin\AppData\Local\Temp\d539aa17bfa95bc25c81308a99a1c834cb28ad23f1ce8bc3715066471bd5d0f7.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\resources\primy.ini C:\Users\Admin\AppData\Local\Temp\d539aa17bfa95bc25c81308a99a1c834cb28ad23f1ce8bc3715066471bd5d0f7.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\d539aa17bfa95bc25c81308a99a1c834cb28ad23f1ce8bc3715066471bd5d0f7.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\d539aa17bfa95bc25c81308a99a1c834cb28ad23f1ce8bc3715066471bd5d0f7.exe

"C:\Users\Admin\AppData\Local\Temp\d539aa17bfa95bc25c81308a99a1c834cb28ad23f1ce8bc3715066471bd5d0f7.exe"

C:\Users\Admin\AppData\Local\Temp\d539aa17bfa95bc25c81308a99a1c834cb28ad23f1ce8bc3715066471bd5d0f7.exe

"C:\Users\Admin\AppData\Local\Temp\d539aa17bfa95bc25c81308a99a1c834cb28ad23f1ce8bc3715066471bd5d0f7.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 138.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 212.20.149.52.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 98.117.19.2.in-addr.arpa udp
US 8.8.8.8:53 kmsaksesuar.com udp
US 44.28.239.165:443 kmsaksesuar.com tcp
US 44.28.239.165:443 kmsaksesuar.com tcp
US 44.28.239.165:443 kmsaksesuar.com tcp
US 44.28.239.165:443 kmsaksesuar.com tcp
US 8.8.8.8:53 30.243.111.52.in-addr.arpa udp
US 44.28.239.165:443 kmsaksesuar.com tcp
US 44.28.239.165:443 kmsaksesuar.com tcp
US 44.28.239.165:443 kmsaksesuar.com tcp
US 44.28.239.165:443 kmsaksesuar.com tcp

Files

C:\Windows\Resources\primy.ini

MD5 76d9175a3db7407eb0bfc3c07ddcd9d2
SHA1 72071127e9a44935cb02650ed715ccaf6a8f8418
SHA256 1f7119996dd17af05bf05e497104715bbbc3909676afa4329fbd59502be1a1a5
SHA512 5032dab71e70a4bd1dad2f5cf9380e0097be7993bc46886fed6e4bdd8781f2b10d31338d90d0dc5804665bda2cbfe93f1172250e1a8ab7c9118baf9f156e3c69

C:\Users\Admin\AppData\Local\Temp\nsfAD48.tmp\System.dll

MD5 192639861e3dc2dc5c08bb8f8c7260d5
SHA1 58d30e460609e22fa0098bc27d928b689ef9af78
SHA256 23d618a0293c78ce00f7c6e6dd8b8923621da7dd1f63a070163ef4c0ec3033d6
SHA512 6e573d8b2ef6ed719e271fd0b2fd9cd451f61fc9a9459330108d6d7a65a0f64016303318cad787aa1d5334ba670d8f1c7c13074e1be550b4a316963ecc465cdc

memory/4272-23237-0x0000000002F20000-0x0000000006002000-memory.dmp

memory/4272-23238-0x0000000002F20000-0x0000000006002000-memory.dmp

memory/4272-23239-0x0000000076ED1000-0x0000000076FF1000-memory.dmp

memory/4272-23240-0x0000000073BC5000-0x0000000073BC6000-memory.dmp

memory/4272-23242-0x0000000002F20000-0x0000000006002000-memory.dmp

memory/4724-23241-0x0000000000400000-0x0000000001654000-memory.dmp

memory/4724-23243-0x0000000001660000-0x0000000004742000-memory.dmp

memory/4724-23244-0x0000000001660000-0x0000000004742000-memory.dmp

memory/4724-23245-0x0000000000400000-0x0000000001654000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2024-11-07 03:19

Reported

2024-11-07 03:22

Platform

win7-20241010-en

Max time kernel

121s

Max time network

126s

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 2080 -s 224

Network

N/A

Files

N/A