Malware Analysis Report

2024-10-10 10:09

Sample ID 240502-fc6zxsbc37
Target pulse.exe
SHA256 0e4f60dac056f2c2b989e90990ee53c6c22d1dad6f4b5c033ef0213f0e386bcf
Tags
umbral spyware stealer
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 Overview

score
10/10

SHA256

0e4f60dac056f2c2b989e90990ee53c6c22d1dad6f4b5c033ef0213f0e386bcf

Threat Level: Known bad

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

Malicious Activity Summary

umbral spyware stealer

Umbral family

Detect Umbral payload

Umbral

Drops file in Drivers directory

Reads user/profile data of web browsers

Legitimate hosting services abused for malware hosting/C2

Looks up external IP address via web service

Unsigned PE

Views/modifies file attributes

Runs ping.exe

Suspicious use of WriteProcessMemory

Detects videocard installed

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-02 04:44

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

2024-05-02 04:44

Reported

2024-05-02 04:47

Platform

win10v2004-20240419-en

Max time kernel

145s

Max time network

108s

Command Line

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

Signatures

Detect Umbral payload

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

Umbral

stealer umbral

Drops file in Drivers directory

Description Indicator Process Target
File opened for modification C:\Windows\System32\drivers\etc\hosts C:\Users\Admin\AppData\Local\Temp\pulse.exe N/A

Reads user/profile data of web browsers

spyware stealer

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\pulse.exe N/A
Token: SeIncreaseQuotaPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeSystemtimePrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeProfSingleProcessPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeSystemEnvironmentPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeRemoteShutdownPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeUndockPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeManageVolumePrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: 33 N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: 34 N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: 35 N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: 36 N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeIncreaseQuotaPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeSystemtimePrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeProfSingleProcessPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeSystemEnvironmentPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeRemoteShutdownPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeUndockPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeManageVolumePrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: 33 N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: 34 N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: 35 N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: 36 N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeIncreaseQuotaPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeSystemtimePrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeProfSingleProcessPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeSystemEnvironmentPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeRemoteShutdownPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeUndockPrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A
Token: SeManageVolumePrivilege N/A C:\Windows\System32\Wbem\wmic.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3136 wrote to memory of 1508 N/A C:\Users\Admin\AppData\Local\Temp\pulse.exe C:\Windows\System32\Wbem\wmic.exe
PID 3136 wrote to memory of 1508 N/A C:\Users\Admin\AppData\Local\Temp\pulse.exe C:\Windows\System32\Wbem\wmic.exe
PID 3136 wrote to memory of 4832 N/A C:\Users\Admin\AppData\Local\Temp\pulse.exe C:\Windows\SYSTEM32\attrib.exe
PID 3136 wrote to memory of 4832 N/A C:\Users\Admin\AppData\Local\Temp\pulse.exe C:\Windows\SYSTEM32\attrib.exe
PID 3136 wrote to memory of 3544 N/A C:\Users\Admin\AppData\Local\Temp\pulse.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3136 wrote to memory of 3544 N/A C:\Users\Admin\AppData\Local\Temp\pulse.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3136 wrote to memory of 860 N/A C:\Users\Admin\AppData\Local\Temp\pulse.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3136 wrote to memory of 860 N/A C:\Users\Admin\AppData\Local\Temp\pulse.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3136 wrote to memory of 1412 N/A C:\Users\Admin\AppData\Local\Temp\pulse.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3136 wrote to memory of 1412 N/A C:\Users\Admin\AppData\Local\Temp\pulse.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3136 wrote to memory of 1672 N/A C:\Users\Admin\AppData\Local\Temp\pulse.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3136 wrote to memory of 1672 N/A C:\Users\Admin\AppData\Local\Temp\pulse.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3136 wrote to memory of 2852 N/A C:\Users\Admin\AppData\Local\Temp\pulse.exe C:\Windows\System32\Wbem\wmic.exe
PID 3136 wrote to memory of 2852 N/A C:\Users\Admin\AppData\Local\Temp\pulse.exe C:\Windows\System32\Wbem\wmic.exe
PID 3136 wrote to memory of 2656 N/A C:\Users\Admin\AppData\Local\Temp\pulse.exe C:\Windows\System32\Wbem\wmic.exe
PID 3136 wrote to memory of 2656 N/A C:\Users\Admin\AppData\Local\Temp\pulse.exe C:\Windows\System32\Wbem\wmic.exe
PID 3136 wrote to memory of 1832 N/A C:\Users\Admin\AppData\Local\Temp\pulse.exe C:\Windows\System32\Wbem\wmic.exe
PID 3136 wrote to memory of 1832 N/A C:\Users\Admin\AppData\Local\Temp\pulse.exe C:\Windows\System32\Wbem\wmic.exe
PID 3136 wrote to memory of 624 N/A C:\Users\Admin\AppData\Local\Temp\pulse.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3136 wrote to memory of 624 N/A C:\Users\Admin\AppData\Local\Temp\pulse.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3136 wrote to memory of 2208 N/A C:\Users\Admin\AppData\Local\Temp\pulse.exe C:\Windows\System32\Wbem\wmic.exe
PID 3136 wrote to memory of 2208 N/A C:\Users\Admin\AppData\Local\Temp\pulse.exe C:\Windows\System32\Wbem\wmic.exe
PID 3136 wrote to memory of 2952 N/A C:\Users\Admin\AppData\Local\Temp\pulse.exe C:\Windows\SYSTEM32\cmd.exe
PID 3136 wrote to memory of 2952 N/A C:\Users\Admin\AppData\Local\Temp\pulse.exe C:\Windows\SYSTEM32\cmd.exe
PID 2952 wrote to memory of 4312 N/A C:\Windows\SYSTEM32\cmd.exe C:\Windows\system32\PING.EXE
PID 2952 wrote to memory of 4312 N/A C:\Windows\SYSTEM32\cmd.exe C:\Windows\system32\PING.EXE

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\pulse.exe

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

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

"powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\pulse.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\pulse.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 ip-api.com udp
US 208.95.112.1:80 ip-api.com tcp
US 8.8.8.8:53 99.201.58.216.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 1.112.95.208.in-addr.arpa udp
US 8.8.8.8:53 133.32.126.40.in-addr.arpa udp
US 208.95.112.1:80 ip-api.com tcp
US 8.8.8.8:53 discord.com udp
US 162.159.128.233:443 discord.com tcp
US 8.8.8.8:53 233.128.159.162.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
NL 23.62.61.97:443 www.bing.com tcp
US 20.231.121.79:80 tcp
US 8.8.8.8:53 97.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 77.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 48.251.17.2.in-addr.arpa udp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp

Files

memory/3136-0-0x0000019450550000-0x0000019450590000-memory.dmp

memory/3136-1-0x00007FFF19CC3000-0x00007FFF19CC5000-memory.dmp

memory/3136-2-0x00007FFF19CC0000-0x00007FFF1A781000-memory.dmp

memory/3544-3-0x00007FFF19CC0000-0x00007FFF1A781000-memory.dmp

memory/3544-4-0x00007FFF19CC0000-0x00007FFF1A781000-memory.dmp

memory/3544-5-0x00007FFF19CC0000-0x00007FFF1A781000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ll0qrnl3.j2r.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/3544-15-0x000001E3AF4E0000-0x000001E3AF502000-memory.dmp

memory/3544-18-0x00007FFF19CC0000-0x00007FFF1A781000-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 2979eabc783eaca50de7be23dd4eafcf
SHA1 d709ce5f3a06b7958a67e20870bfd95b83cad2ea
SHA256 006cca90e78fbb571532a83082ac6712721a34ea4b21f490058ffb3f521f4903
SHA512 92bc433990572d9427d0c93eef9bd1cc23fa00ed60dd0c9c983d87d3421e02ce3f156c6f88fe916ef6782dbf185cbce083bc0094f8c527f302be6a37d1c53aba

memory/3136-33-0x000001946AC80000-0x000001946ACF6000-memory.dmp

memory/3136-34-0x000001946AD00000-0x000001946AD50000-memory.dmp

memory/3136-35-0x0000019452210000-0x000001945222E000-memory.dmp

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

MD5 1a58f982c18490e622e00d4eb75ace5a
SHA1 60c30527b74659ecf09089a5a7c02a1df9a71b65
SHA256 4b7f800c0dea209162cc86627983993127eb20e3f8616646c41cb3ce15d9b39d
SHA512 ddab516a967783c5951717853aa5b3ef6dd5b442db50092888b2e7f3179fc68120fcde69a08d6ab280740eaadb6eadfc758c3118b52706f869e48ac1aebda480

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

MD5 276798eeb29a49dc6e199768bc9c2e71
SHA1 5fdc8ccb897ac2df7476fbb07517aca5b7a6205b
SHA256 cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc
SHA512 0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2

memory/3136-71-0x0000019452230000-0x000001945223A000-memory.dmp

memory/3136-72-0x000001946AD50000-0x000001946AD62000-memory.dmp

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

MD5 f2c36eba56eb920886e708e19011cc5d
SHA1 cdf245a5777270b135c3b89eeeb6df1badf6e16e
SHA256 9dc08df6cd84b6a9c645f81697c455080811a622a699aae94cf177a32339b8ad
SHA512 8409b92630fc6d1b56d2570b20f367ec9c8ddeca38067b26dd72fbe93b85275ccc7e567e652a6a7e70bc188be32095f54ac369073ae3598c29aabed0cf2786de

memory/3136-90-0x00007FFF19CC0000-0x00007FFF1A781000-memory.dmp