Malware Analysis Report

2024-10-18 23:08

Sample ID 240710-cg9ptszfpp
Target a03913b0dcf4d9707eb9c74d69b522927e760e9be55effb0e14ebbbaad9177c7.exe
SHA256 a03913b0dcf4d9707eb9c74d69b522927e760e9be55effb0e14ebbbaad9177c7
Tags
execution guloader downloader persistence
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: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

a03913b0dcf4d9707eb9c74d69b522927e760e9be55effb0e14ebbbaad9177c7

Threat Level: Known bad

The file a03913b0dcf4d9707eb9c74d69b522927e760e9be55effb0e14ebbbaad9177c7.exe was found to be: Known bad.

Malicious Activity Summary

execution guloader downloader persistence

Guloader,Cloudeye

Command and Scripting Interpreter: PowerShell

Adds Run key to start application

Legitimate hosting services abused for malware hosting/C2

Suspicious use of NtSetInformationThreadHideFromDebugger

Suspicious use of SetThreadContext

Suspicious use of NtCreateThreadExHideFromDebugger

Enumerates physical storage devices

Program crash

NSIS installer

Modifies registry key

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: MapViewOfSection

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-07-10 02:04

Signatures

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

2024-07-10 02:04

Reported

2024-07-10 02:06

Platform

win10v2004-20240709-en

Max time kernel

94s

Max time network

125s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a03913b0dcf4d9707eb9c74d69b522927e760e9be55effb0e14ebbbaad9177c7.exe"

Signatures

Command and Scripting Interpreter: PowerShell

execution
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe N/A

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\a03913b0dcf4d9707eb9c74d69b522927e760e9be55effb0e14ebbbaad9177c7.exe

"C:\Users\Admin\AppData\Local\Temp\a03913b0dcf4d9707eb9c74d69b522927e760e9be55effb0e14ebbbaad9177c7.exe"

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe

"powershell.exe" -windowstyle hidden "$Vindflj=Get-Content 'C:\Users\Admin\AppData\Roaming\annekskirkers\dommedagens\nonmenial\delysten.imp';$Byggryn=$Vindflj.SubString(71093,3);.$Byggryn($Vindflj)"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4832 -ip 4832

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4832 -s 2308

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 74.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.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

memory/4832-9-0x00000000734CE000-0x00000000734CF000-memory.dmp

memory/4832-10-0x0000000005080000-0x00000000050B6000-memory.dmp

memory/4832-12-0x0000000005710000-0x0000000005D38000-memory.dmp

memory/4832-11-0x00000000734C0000-0x0000000073C70000-memory.dmp

memory/4832-13-0x00000000734C0000-0x0000000073C70000-memory.dmp

memory/4832-14-0x0000000005690000-0x00000000056B2000-memory.dmp

memory/4832-15-0x0000000005FA0000-0x0000000006006000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vpd3w3nq.l40.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/4832-25-0x0000000006010000-0x0000000006076000-memory.dmp

memory/4832-26-0x00000000062A0000-0x00000000065F4000-memory.dmp

memory/4832-27-0x0000000006660000-0x000000000667E000-memory.dmp

memory/4832-28-0x00000000066A0000-0x00000000066EC000-memory.dmp

memory/4832-29-0x0000000007670000-0x0000000007706000-memory.dmp

memory/4832-30-0x0000000006B80000-0x0000000006B9A000-memory.dmp

memory/4832-31-0x0000000006BA0000-0x0000000006BC2000-memory.dmp

memory/4832-32-0x0000000007CC0000-0x0000000008264000-memory.dmp

C:\Users\Admin\AppData\Roaming\annekskirkers\dommedagens\nonmenial\delysten.imp

MD5 8172795f7c8cfb7cc597e879d2b0b468
SHA1 811797a9309a1bc3429f3bc7735eb6af1a7c80dc
SHA256 5339721e47b9ac3dfb81b6d81593e9792c57573541918c0d5ca327128aa4345c
SHA512 9718f72091367ed6a02598295a9f35512c6ddb31e3dae9b685060e613c942c755d90418cb4ea31e4bf7ea8967ce34c9356bbf53fafe08a31d851afddd55d7322

memory/4832-34-0x00000000088F0000-0x0000000008F6A000-memory.dmp

memory/4832-36-0x00000000734C0000-0x0000000073C70000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-07-10 02:04

Reported

2024-07-10 02:06

Platform

win7-20240705-en

Max time kernel

122s

Max time network

125s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a03913b0dcf4d9707eb9c74d69b522927e760e9be55effb0e14ebbbaad9177c7.exe"

Signatures

Guloader,Cloudeye

downloader guloader

Command and Scripting Interpreter: PowerShell

execution
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-2172136094-3310281978-782691160-1000\Software\Microsoft\Windows\CurrentVersion\Run\Startup key = "%pantstnings% -windowstyle minimized $Uselessness=(Get-ItemProperty -Path 'HKCU:\\Chet\\').Ruelike;%pantstnings% ($Uselessness)" C:\Windows\SysWOW64\reg.exe N/A

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

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.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 2452 set thread context of 2744 N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe C:\Program Files (x86)\windows mail\wab.exe

Enumerates physical storage devices

Modifies registry key

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\reg.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2304 wrote to memory of 2452 N/A C:\Users\Admin\AppData\Local\Temp\a03913b0dcf4d9707eb9c74d69b522927e760e9be55effb0e14ebbbaad9177c7.exe C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
PID 2304 wrote to memory of 2452 N/A C:\Users\Admin\AppData\Local\Temp\a03913b0dcf4d9707eb9c74d69b522927e760e9be55effb0e14ebbbaad9177c7.exe C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
PID 2304 wrote to memory of 2452 N/A C:\Users\Admin\AppData\Local\Temp\a03913b0dcf4d9707eb9c74d69b522927e760e9be55effb0e14ebbbaad9177c7.exe C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
PID 2304 wrote to memory of 2452 N/A C:\Users\Admin\AppData\Local\Temp\a03913b0dcf4d9707eb9c74d69b522927e760e9be55effb0e14ebbbaad9177c7.exe C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
PID 2452 wrote to memory of 2744 N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe C:\Program Files (x86)\windows mail\wab.exe
PID 2452 wrote to memory of 2744 N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe C:\Program Files (x86)\windows mail\wab.exe
PID 2452 wrote to memory of 2744 N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe C:\Program Files (x86)\windows mail\wab.exe
PID 2452 wrote to memory of 2744 N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe C:\Program Files (x86)\windows mail\wab.exe
PID 2452 wrote to memory of 2744 N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe C:\Program Files (x86)\windows mail\wab.exe
PID 2452 wrote to memory of 2744 N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe C:\Program Files (x86)\windows mail\wab.exe
PID 2744 wrote to memory of 2216 N/A C:\Program Files (x86)\windows mail\wab.exe C:\Windows\SysWOW64\cmd.exe
PID 2744 wrote to memory of 2216 N/A C:\Program Files (x86)\windows mail\wab.exe C:\Windows\SysWOW64\cmd.exe
PID 2744 wrote to memory of 2216 N/A C:\Program Files (x86)\windows mail\wab.exe C:\Windows\SysWOW64\cmd.exe
PID 2744 wrote to memory of 2216 N/A C:\Program Files (x86)\windows mail\wab.exe C:\Windows\SysWOW64\cmd.exe
PID 2216 wrote to memory of 2860 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\reg.exe
PID 2216 wrote to memory of 2860 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\reg.exe
PID 2216 wrote to memory of 2860 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\reg.exe
PID 2216 wrote to memory of 2860 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\reg.exe

Processes

C:\Users\Admin\AppData\Local\Temp\a03913b0dcf4d9707eb9c74d69b522927e760e9be55effb0e14ebbbaad9177c7.exe

"C:\Users\Admin\AppData\Local\Temp\a03913b0dcf4d9707eb9c74d69b522927e760e9be55effb0e14ebbbaad9177c7.exe"

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe

"powershell.exe" -windowstyle hidden "$Vindflj=Get-Content 'C:\Users\Admin\AppData\Roaming\annekskirkers\dommedagens\nonmenial\delysten.imp';$Byggryn=$Vindflj.SubString(71093,3);.$Byggryn($Vindflj)"

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

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

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Startup key" /t REG_EXPAND_SZ /d "%pantstnings% -windowstyle minimized $Uselessness=(Get-ItemProperty -Path 'HKCU:\Chet\').Ruelike;%pantstnings% ($Uselessness)"

C:\Windows\SysWOW64\reg.exe

REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Startup key" /t REG_EXPAND_SZ /d "%pantstnings% -windowstyle minimized $Uselessness=(Get-ItemProperty -Path 'HKCU:\Chet\').Ruelike;%pantstnings% ($Uselessness)"

Network

Country Destination Domain Proto
US 8.8.8.8:53 drive.google.com udp
GB 172.217.16.238:443 drive.google.com tcp
US 8.8.8.8:53 c.pki.goog udp
GB 216.58.201.99:80 c.pki.goog tcp
US 8.8.8.8:53 o.pki.goog udp
GB 216.58.201.99:80 o.pki.goog tcp
US 8.8.8.8:53 drive.usercontent.google.com udp
GB 216.58.201.97:443 drive.usercontent.google.com tcp

Files

C:\Users\Admin\AppData\Roaming\annekskirkers\dommedagens\nonmenial\delysten.imp

MD5 8172795f7c8cfb7cc597e879d2b0b468
SHA1 811797a9309a1bc3429f3bc7735eb6af1a7c80dc
SHA256 5339721e47b9ac3dfb81b6d81593e9792c57573541918c0d5ca327128aa4345c
SHA512 9718f72091367ed6a02598295a9f35512c6ddb31e3dae9b685060e613c942c755d90418cb4ea31e4bf7ea8967ce34c9356bbf53fafe08a31d851afddd55d7322

memory/2452-15-0x0000000073C20000-0x00000000741CB000-memory.dmp

memory/2452-14-0x0000000073C20000-0x00000000741CB000-memory.dmp

memory/2452-13-0x0000000073C20000-0x00000000741CB000-memory.dmp

memory/2452-12-0x0000000073C20000-0x00000000741CB000-memory.dmp

memory/2452-11-0x0000000073C21000-0x0000000073C22000-memory.dmp

memory/2452-18-0x0000000073C20000-0x00000000741CB000-memory.dmp

C:\Users\Admin\AppData\Roaming\annekskirkers\dommedagens\nonmenial\Skyldsttendes.Und

MD5 be381f7baf52513e52dfed9361a6dc69
SHA1 a6cdb30ea1a85a42404e6e2fd29c8d5cc6ad251a
SHA256 caceb5002866580c07883f8fddb62a82d7fadd1e8ca7a2eb4e11240dfda94d79
SHA512 c076aa00785538010dcc9df6aaba0f8af5f130b7edc800fca31da4fff9ee11fa728ba5c78c89047494b0536878d8b32d3f05f43177dacf0416726b02af814c8a

memory/2452-20-0x0000000073C20000-0x00000000741CB000-memory.dmp

memory/2452-21-0x0000000006840000-0x000000000907F000-memory.dmp

memory/2452-22-0x0000000073C20000-0x00000000741CB000-memory.dmp

memory/2744-24-0x00000000005C0000-0x0000000001622000-memory.dmp

memory/2744-44-0x0000000001630000-0x0000000003E6F000-memory.dmp