umbral | c4969a3f443dc0c21066c9b801a86d8802585ed708f209cd418d0252541884bd

Analysis

max time kernel
448s
max time network
1178s
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 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
behavioral2/memory/3172-1-0x0000021CF56C0000-0x0000021CF5700000-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
4624	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
22	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
3572	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4532	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
3172	WaveInstaller.exe
4624	powershell.exe
4624	powershell.exe
2124	powershell.exe
2124	powershell.exe
4600	powershell.exe
4600	powershell.exe
4120	powershell.exe
4120	powershell.exe
4744	powershell.exe
4744	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3172	WaveInstaller.exe
Token: SeIncreaseQuotaPrivilege	4016	wmic.exe
Token: SeSecurityPrivilege	4016	wmic.exe
Token: SeTakeOwnershipPrivilege	4016	wmic.exe
Token: SeLoadDriverPrivilege	4016	wmic.exe
Token: SeSystemProfilePrivilege	4016	wmic.exe
Token: SeSystemtimePrivilege	4016	wmic.exe
Token: SeProfSingleProcessPrivilege	4016	wmic.exe
Token: SeIncBasePriorityPrivilege	4016	wmic.exe
Token: SeCreatePagefilePrivilege	4016	wmic.exe
Token: SeBackupPrivilege	4016	wmic.exe
Token: SeRestorePrivilege	4016	wmic.exe
Token: SeShutdownPrivilege	4016	wmic.exe
Token: SeDebugPrivilege	4016	wmic.exe
Token: SeSystemEnvironmentPrivilege	4016	wmic.exe
Token: SeRemoteShutdownPrivilege	4016	wmic.exe
Token: SeUndockPrivilege	4016	wmic.exe
Token: SeManageVolumePrivilege	4016	wmic.exe
Token: 33	4016	wmic.exe
Token: 34	4016	wmic.exe
Token: 35	4016	wmic.exe
Token: 36	4016	wmic.exe
Token: SeIncreaseQuotaPrivilege	4016	wmic.exe
Token: SeSecurityPrivilege	4016	wmic.exe
Token: SeTakeOwnershipPrivilege	4016	wmic.exe
Token: SeLoadDriverPrivilege	4016	wmic.exe
Token: SeSystemProfilePrivilege	4016	wmic.exe
Token: SeSystemtimePrivilege	4016	wmic.exe
Token: SeProfSingleProcessPrivilege	4016	wmic.exe
Token: SeIncBasePriorityPrivilege	4016	wmic.exe
Token: SeCreatePagefilePrivilege	4016	wmic.exe
Token: SeBackupPrivilege	4016	wmic.exe
Token: SeRestorePrivilege	4016	wmic.exe
Token: SeShutdownPrivilege	4016	wmic.exe
Token: SeDebugPrivilege	4016	wmic.exe
Token: SeSystemEnvironmentPrivilege	4016	wmic.exe
Token: SeRemoteShutdownPrivilege	4016	wmic.exe
Token: SeUndockPrivilege	4016	wmic.exe
Token: SeManageVolumePrivilege	4016	wmic.exe
Token: 33	4016	wmic.exe
Token: 34	4016	wmic.exe
Token: 35	4016	wmic.exe
Token: 36	4016	wmic.exe
Token: SeDebugPrivilege	4624	powershell.exe
Token: SeDebugPrivilege	2124	powershell.exe
Token: SeDebugPrivilege	4600	powershell.exe
Token: SeDebugPrivilege	4120	powershell.exe
Token: SeIncreaseQuotaPrivilege	3224	wmic.exe
Token: SeSecurityPrivilege	3224	wmic.exe
Token: SeTakeOwnershipPrivilege	3224	wmic.exe
Token: SeLoadDriverPrivilege	3224	wmic.exe
Token: SeSystemProfilePrivilege	3224	wmic.exe
Token: SeSystemtimePrivilege	3224	wmic.exe
Token: SeProfSingleProcessPrivilege	3224	wmic.exe
Token: SeIncBasePriorityPrivilege	3224	wmic.exe
Token: SeCreatePagefilePrivilege	3224	wmic.exe
Token: SeBackupPrivilege	3224	wmic.exe
Token: SeRestorePrivilege	3224	wmic.exe
Token: SeShutdownPrivilege	3224	wmic.exe
Token: SeDebugPrivilege	3224	wmic.exe
Token: SeSystemEnvironmentPrivilege	3224	wmic.exe
Token: SeRemoteShutdownPrivilege	3224	wmic.exe
Token: SeUndockPrivilege	3224	wmic.exe
Token: SeManageVolumePrivilege	3224	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3172 wrote to memory of 4016	3172	WaveInstaller.exe	80
PID 3172 wrote to memory of 4016	3172	WaveInstaller.exe	80
PID 3172 wrote to memory of 1940	3172	WaveInstaller.exe	83
PID 3172 wrote to memory of 1940	3172	WaveInstaller.exe	83
PID 3172 wrote to memory of 4624	3172	WaveInstaller.exe	85
PID 3172 wrote to memory of 4624	3172	WaveInstaller.exe	85
PID 3172 wrote to memory of 2124	3172	WaveInstaller.exe	88
PID 3172 wrote to memory of 2124	3172	WaveInstaller.exe	88
PID 3172 wrote to memory of 4600	3172	WaveInstaller.exe	90
PID 3172 wrote to memory of 4600	3172	WaveInstaller.exe	90
PID 3172 wrote to memory of 4120	3172	WaveInstaller.exe	92
PID 3172 wrote to memory of 4120	3172	WaveInstaller.exe	92
PID 3172 wrote to memory of 3224	3172	WaveInstaller.exe	94
PID 3172 wrote to memory of 3224	3172	WaveInstaller.exe	94
PID 3172 wrote to memory of 3000	3172	WaveInstaller.exe	96
PID 3172 wrote to memory of 3000	3172	WaveInstaller.exe	96
PID 3172 wrote to memory of 4716	3172	WaveInstaller.exe	98
PID 3172 wrote to memory of 4716	3172	WaveInstaller.exe	98
PID 3172 wrote to memory of 4744	3172	WaveInstaller.exe	100
PID 3172 wrote to memory of 4744	3172	WaveInstaller.exe	100
PID 3172 wrote to memory of 3572	3172	WaveInstaller.exe	102
PID 3172 wrote to memory of 3572	3172	WaveInstaller.exe	102
PID 3172 wrote to memory of 4220	3172	WaveInstaller.exe	104
PID 3172 wrote to memory of 4220	3172	WaveInstaller.exe	104
PID 4220 wrote to memory of 4532	4220	cmd.exe	106
PID 4220 wrote to memory of 4532	4220	cmd.exe	106

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
1940	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:3172
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4016
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\WaveInstaller.exe"
  2⤵
  - Views/modifies file attributes
  PID:1940
- 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:4624
- 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:2124
- 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:4600
- 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:4120
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3224
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:3000
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4716
- 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:4744
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:3572
- 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:4220
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:4532

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
1a58f982c18490e622e00d4eb75ace5a

SHA1
60c30527b74659ecf09089a5a7c02a1df9a71b65

SHA256
4b7f800c0dea209162cc86627983993127eb20e3f8616646c41cb3ce15d9b39d

SHA512
ddab516a967783c5951717853aa5b3ef6dd5b442db50092888b2e7f3179fc68120fcde69a08d6ab280740eaadb6eadfc758c3118b52706f869e48ac1aebda480

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

Filesize
1KB

MD5
276798eeb29a49dc6e199768bc9c2e71

SHA1
5fdc8ccb897ac2df7476fbb07517aca5b7a6205b

SHA256
cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc

SHA512
0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2

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

Filesize
1KB

MD5
6317adf4fbc43ea2fd68861fafd57155

SHA1
6b87c718893c83c6eed2767e8d9cbc6443e31913

SHA256
c1ead17eef37b4b461cedc276504a441489e819c7f943037f2001966aeec90af

SHA512
17229aae8622e4bfc3caaac55684f7d4ccd3162af5919c851b1d8ac4060b6bb7b75044ecee116523d05acb55197dcb60780958f629450edef386f1e6f65f49f0

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_qc5feib5.y0d.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3172-34-0x0000021CF7EE0000-0x0000021CF7EFE000-memory.dmp

Filesize
120KB

Download
memory/3172-0-0x00007FFC66BF3000-0x00007FFC66BF5000-memory.dmp

Filesize
8KB

Download
memory/3172-32-0x0000021CF7E20000-0x0000021CF7E96000-memory.dmp

Filesize
472KB

Download
memory/3172-33-0x0000021CF7330000-0x0000021CF7380000-memory.dmp

Filesize
320KB

Download
memory/3172-2-0x00007FFC66BF0000-0x00007FFC676B1000-memory.dmp

Filesize
10.8MB

Download
memory/3172-70-0x0000021CF7EA0000-0x0000021CF7EB2000-memory.dmp

Filesize
72KB

Download
memory/3172-69-0x0000021CF73C0000-0x0000021CF73CA000-memory.dmp

Filesize
40KB

Download
memory/3172-1-0x0000021CF56C0000-0x0000021CF5700000-memory.dmp

Filesize
256KB

Download
memory/3172-86-0x00007FFC66BF0000-0x00007FFC676B1000-memory.dmp

Filesize
10.8MB

Download
memory/4624-17-0x00007FFC66BF0000-0x00007FFC676B1000-memory.dmp

Filesize
10.8MB

Download
memory/4624-13-0x00000203F3070000-0x00000203F3092000-memory.dmp

Filesize
136KB

Download
memory/4624-14-0x00007FFC66BF0000-0x00007FFC676B1000-memory.dmp

Filesize
10.8MB

Download
memory/4624-3-0x00007FFC66BF0000-0x00007FFC676B1000-memory.dmp

Filesize
10.8MB

Download