Malware Analysis Report

2024-11-15 09:59

Sample ID 241110-cfmtnszmfr
Target acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894acN
SHA256 acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894ac
Tags
discovery guloader downloader
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: behavioral5

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral6

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

acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894ac

Threat Level: Known bad

The file acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894acN was found to be: Known bad.

Malicious Activity Summary

discovery guloader downloader

Guloader family

Guloader,Cloudeye

Loads dropped DLL

Suspicious use of NtSetInformationThreadHideFromDebugger

Suspicious use of SetThreadContext

System Location Discovery: System Language Discovery

Enumerates physical storage devices

Program crash

Unsigned PE

NSIS installer

Suspicious use of WriteProcessMemory

Suspicious behavior: MapViewOfSection

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-10 02:01

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
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: behavioral3

Detonation Overview

Submitted

2024-11-10 02:01

Reported

2024-11-10 02:03

Platform

win7-20240903-en

Max time kernel

63s

Max time network

16s

Command Line

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

C:\Windows\SysWOW64\rundll32.exe

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

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1856 -s 220

Network

N/A

Files

N/A

Analysis: behavioral4

Detonation Overview

Submitted

2024-11-10 02:01

Reported

2024-11-10 02:03

Platform

win10v2004-20241007-en

Max time kernel

93s

Max time network

94s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\LangDLL.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 2756 wrote to memory of 2452 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2756 wrote to memory of 2452 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2756 wrote to memory of 2452 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\LangDLL.dll,#1

C:\Windows\SysWOW64\rundll32.exe

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

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2452 -ip 2452

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2452 -s 600

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 68.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 56.163.245.4.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp

Files

N/A

Analysis: behavioral5

Detonation Overview

Submitted

2024-11-10 02:01

Reported

2024-11-10 02:03

Platform

win7-20240903-en

Max time kernel

15s

Max time network

16s

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 2912 -s 220

Network

N/A

Files

N/A

Analysis: behavioral6

Detonation Overview

Submitted

2024-11-10 02:01

Reported

2024-11-10 02:03

Platform

win10v2004-20241007-en

Max time kernel

94s

Max time network

95s

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 3564 wrote to memory of 448 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3564 wrote to memory of 448 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3564 wrote to memory of 448 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 416 -p 448 -ip 448

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 448 -s 612

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 68.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 56.163.245.4.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 75.117.19.2.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 31.243.111.52.in-addr.arpa udp

Files

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-10 02:01

Reported

2024-11-10 02:03

Platform

win7-20240903-en

Max time kernel

117s

Max time network

118s

Command Line

"C:\Users\Admin\AppData\Local\Temp\acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894acN.exe"

Signatures

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\acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894acN.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894acN.exe

"C:\Users\Admin\AppData\Local\Temp\acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894acN.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2072 -s 524

Network

N/A

Files

C:\Users\Admin\AppData\Local\Temp\nstDFF4.tmp\System.dll

MD5 4ca4fd3fbefa2f6e87e6e9ee87d1c0b3
SHA1 7cdbeb5ff2b14b86af04e075d0ca651183ea5df4
SHA256 d09a8b3ade4ba4b7292c0b3da1bcb4b6c6e2012e0ccfd5e029a54af73a9e1b57
SHA512 cf0f415a97fdc74568297fed4f1295d0d2aef487a308141144ef8d5f04c669ef4795c273e745b81065429adde113fcdedf4c22717a7aeef60fdcd8d4d46f97f8

\Users\Admin\AppData\Local\Temp\nstDFF4.tmp\LangDLL.dll

MD5 61f69388ae89d61a3d838cbcf81b4f82
SHA1 e595c0236a373a6ac79c334dc183ee03ca8f8ecd
SHA256 d65875bb4bc121f81384d55fde90dd9eb9ad1878cd8a02bcb5c8a933c3987a61
SHA512 21d34738cc21c1ef6b0ef1ac53659cdab224bbc20ea983f9a952a2cb4b5785a07bb18c0acf22a0d12a94795e1fc6d314f442c923bb1a93b675edac8c6aacf469

memory/2072-35-0x0000000004060000-0x0000000006835000-memory.dmp

memory/2072-36-0x0000000004060000-0x0000000006835000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-10 02:01

Reported

2024-11-10 02:03

Platform

win10v2004-20241007-en

Max time kernel

118s

Max time network

119s

Command Line

"C:\Users\Admin\AppData\Local\Temp\acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894acN.exe"

Signatures

Guloader family

guloader

Guloader,Cloudeye

downloader guloader

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\acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894acN.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894acN.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894acN.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894acN.exe

"C:\Users\Admin\AppData\Local\Temp\acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894acN.exe"

C:\Users\Admin\AppData\Local\Temp\acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894acN.exe

"C:\Users\Admin\AppData\Local\Temp\acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894acN.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 23.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 iw.achulapo.ru.com udp
US 8.8.8.8:53 iw.achulapo.ru.com udp
US 8.8.8.8:53 212.20.149.52.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 iw.achulapo.ru.com udp
US 8.8.8.8:53 iw.achulapo.ru.com udp
US 8.8.8.8:53 iw.achulapo.ru.com udp
US 8.8.8.8:53 iw.achulapo.ru.com udp
US 8.8.8.8:53 iw.achulapo.ru.com udp
US 8.8.8.8:53 iw.achulapo.ru.com udp
US 8.8.8.8:53 31.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 iw.achulapo.ru.com udp
US 8.8.8.8:53 iw.achulapo.ru.com udp
US 8.8.8.8:53 iw.achulapo.ru.com udp

Files

C:\Users\Admin\AppData\Local\Temp\nswA365.tmp\System.dll

MD5 4ca4fd3fbefa2f6e87e6e9ee87d1c0b3
SHA1 7cdbeb5ff2b14b86af04e075d0ca651183ea5df4
SHA256 d09a8b3ade4ba4b7292c0b3da1bcb4b6c6e2012e0ccfd5e029a54af73a9e1b57
SHA512 cf0f415a97fdc74568297fed4f1295d0d2aef487a308141144ef8d5f04c669ef4795c273e745b81065429adde113fcdedf4c22717a7aeef60fdcd8d4d46f97f8

C:\Users\Admin\AppData\Local\Temp\nswA365.tmp\LangDLL.dll

MD5 61f69388ae89d61a3d838cbcf81b4f82
SHA1 e595c0236a373a6ac79c334dc183ee03ca8f8ecd
SHA256 d65875bb4bc121f81384d55fde90dd9eb9ad1878cd8a02bcb5c8a933c3987a61
SHA512 21d34738cc21c1ef6b0ef1ac53659cdab224bbc20ea983f9a952a2cb4b5785a07bb18c0acf22a0d12a94795e1fc6d314f442c923bb1a93b675edac8c6aacf469

memory/2684-29-0x0000000005240000-0x0000000007A15000-memory.dmp

memory/2684-30-0x0000000005240000-0x0000000007A15000-memory.dmp

memory/2684-31-0x0000000077461000-0x0000000077581000-memory.dmp

memory/2684-33-0x00000000742C4000-0x00000000742C5000-memory.dmp

memory/2684-32-0x0000000077461000-0x0000000077581000-memory.dmp

memory/2580-34-0x0000000000400000-0x0000000001654000-memory.dmp

memory/2684-35-0x0000000005240000-0x0000000007A15000-memory.dmp

memory/2580-36-0x0000000001660000-0x0000000003E35000-memory.dmp

memory/2580-37-0x0000000000400000-0x0000000001654000-memory.dmp

memory/2580-38-0x0000000001660000-0x0000000003E35000-memory.dmp