Malware Analysis Report

2024-11-13 17:39

Sample ID 241107-ckph3avpgr
Target 137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe
SHA256 137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86
Tags
discovery guloader downloader
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

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: 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

137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86

Threat Level: Known bad

The file 137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe was found to be: Known bad.

Malicious Activity Summary

discovery guloader downloader

Guloader family

Guloader,Cloudeye

Loads dropped DLL

Suspicious use of SetThreadContext

Suspicious use of NtCreateThreadExHideFromDebugger

Suspicious use of NtSetInformationThreadHideFromDebugger

System Location Discovery: System Language Discovery

Program crash

Unsigned PE

Enumerates physical storage devices

NSIS installer

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-07 02:08

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: behavioral5

Detonation Overview

Submitted

2024-11-07 02:08

Reported

2024-11-07 02:10

Platform

win7-20240903-en

Max time kernel

121s

Max time network

122s

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 2664 -s 220

Network

N/A

Files

N/A

Analysis: behavioral6

Detonation Overview

Submitted

2024-11-07 02:08

Reported

2024-11-07 02:10

Platform

win10v2004-20241007-en

Max time kernel

95s

Max time network

133s

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 1324 wrote to memory of 512 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1324 wrote to memory of 512 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1324 wrote to memory of 512 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 408 -p 512 -ip 512

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 512 -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 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 138.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 67.208.201.84.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 56.163.245.4.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 75.117.19.2.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.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

2024-11-07 02:08

Reported

2024-11-07 02:10

Platform

win7-20240903-en

Max time kernel

122s

Max time network

123s

Command Line

"C:\Users\Admin\AppData\Local\Temp\137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.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\137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe

"C:\Users\Admin\AppData\Local\Temp\137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2440 -s 528

Network

N/A

Files

\Users\Admin\AppData\Local\Temp\nsj8EAA.tmp\System.dll

MD5 4ca4fd3fbefa2f6e87e6e9ee87d1c0b3
SHA1 7cdbeb5ff2b14b86af04e075d0ca651183ea5df4
SHA256 d09a8b3ade4ba4b7292c0b3da1bcb4b6c6e2012e0ccfd5e029a54af73a9e1b57
SHA512 cf0f415a97fdc74568297fed4f1295d0d2aef487a308141144ef8d5f04c669ef4795c273e745b81065429adde113fcdedf4c22717a7aeef60fdcd8d4d46f97f8

\Users\Admin\AppData\Local\Temp\nsj8EAA.tmp\LangDLL.dll

MD5 61f69388ae89d61a3d838cbcf81b4f82
SHA1 e595c0236a373a6ac79c334dc183ee03ca8f8ecd
SHA256 d65875bb4bc121f81384d55fde90dd9eb9ad1878cd8a02bcb5c8a933c3987a61
SHA512 21d34738cc21c1ef6b0ef1ac53659cdab224bbc20ea983f9a952a2cb4b5785a07bb18c0acf22a0d12a94795e1fc6d314f442c923bb1a93b675edac8c6aacf469

memory/2440-35-0x0000000003DE0000-0x0000000004E7E000-memory.dmp

memory/2440-36-0x0000000003DE0000-0x0000000004E7E000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-07 02:08

Reported

2024-11-07 02:10

Platform

win10v2004-20241007-en

Max time kernel

93s

Max time network

138s

Command Line

"C:\Users\Admin\AppData\Local\Temp\137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe"

Signatures

Guloader family

guloader

Guloader,Cloudeye

downloader guloader

Suspicious use of NtCreateThreadExHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.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\137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe

"C:\Users\Admin\AppData\Local\Temp\137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe"

C:\Users\Admin\AppData\Local\Temp\137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe

"C:\Users\Admin\AppData\Local\Temp\137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1868 -ip 1868

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1868 -s 1232

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 73.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 iw.achulapo.ru.com udp
DE 100.42.180.70:80 iw.achulapo.ru.com tcp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 70.180.42.100.in-addr.arpa udp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 241.42.69.40.in-addr.arpa udp
US 8.8.8.8:53 197.87.175.4.in-addr.arpa udp
US 8.8.8.8:53 75.117.19.2.in-addr.arpa udp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\nsa8629.tmp\LangDLL.dll

MD5 61f69388ae89d61a3d838cbcf81b4f82
SHA1 e595c0236a373a6ac79c334dc183ee03ca8f8ecd
SHA256 d65875bb4bc121f81384d55fde90dd9eb9ad1878cd8a02bcb5c8a933c3987a61
SHA512 21d34738cc21c1ef6b0ef1ac53659cdab224bbc20ea983f9a952a2cb4b5785a07bb18c0acf22a0d12a94795e1fc6d314f442c923bb1a93b675edac8c6aacf469

C:\Users\Admin\AppData\Local\Temp\nsa8629.tmp\System.dll

MD5 4ca4fd3fbefa2f6e87e6e9ee87d1c0b3
SHA1 7cdbeb5ff2b14b86af04e075d0ca651183ea5df4
SHA256 d09a8b3ade4ba4b7292c0b3da1bcb4b6c6e2012e0ccfd5e029a54af73a9e1b57
SHA512 cf0f415a97fdc74568297fed4f1295d0d2aef487a308141144ef8d5f04c669ef4795c273e745b81065429adde113fcdedf4c22717a7aeef60fdcd8d4d46f97f8

memory/4624-29-0x0000000004A20000-0x0000000005ABE000-memory.dmp

memory/4624-30-0x0000000077121000-0x0000000077241000-memory.dmp

memory/4624-31-0x0000000073F84000-0x0000000073F85000-memory.dmp

memory/4624-32-0x0000000004A20000-0x0000000005ABE000-memory.dmp

memory/1868-33-0x0000000000400000-0x0000000001654000-memory.dmp

memory/1868-34-0x0000000001660000-0x00000000026FE000-memory.dmp

memory/1868-35-0x00000000771A8000-0x00000000771A9000-memory.dmp

memory/1868-36-0x00000000771C5000-0x00000000771C6000-memory.dmp

memory/1868-38-0x0000000000401000-0x0000000000404000-memory.dmp

memory/1868-37-0x0000000000400000-0x0000000001654000-memory.dmp

memory/1868-39-0x0000000001660000-0x00000000026FE000-memory.dmp

memory/1868-40-0x0000000000400000-0x0000000001654000-memory.dmp

memory/1868-42-0x0000000077121000-0x0000000077241000-memory.dmp

memory/1868-41-0x0000000000400000-0x0000000001654000-memory.dmp

memory/1868-43-0x0000000000401000-0x0000000000404000-memory.dmp

memory/1868-44-0x0000000000400000-0x0000000001654000-memory.dmp

memory/1868-45-0x0000000000400000-0x0000000001654000-memory.dmp

memory/1868-46-0x0000000000400000-0x0000000001654000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2024-11-07 02:08

Reported

2024-11-07 02:10

Platform

win7-20240903-en

Max time kernel

117s

Max time network

118s

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 3068 -s 220

Network

N/A

Files

N/A

Analysis: behavioral4

Detonation Overview

Submitted

2024-11-07 02:08

Reported

2024-11-07 02:10

Platform

win10v2004-20241007-en

Max time kernel

94s

Max time network

149s

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 1720 wrote to memory of 1204 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1720 wrote to memory of 1204 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1720 wrote to memory of 1204 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 404 -p 1204 -ip 1204

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1204 -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 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 14.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 197.87.175.4.in-addr.arpa udp
US 8.8.8.8:53 241.42.69.40.in-addr.arpa udp
US 8.8.8.8:53 66.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 99.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp

Files

N/A