umbral | 64f6576c6db1eaaefbe0ab36e362592c8b27ff856cfcb29c032d06c1f289df1c

Analysis

max time kernel
135s
max time network
128s
platform
windows10-2004_x64
resource
win10v2004-20240611-en
resource tags

arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
submitted
28-06-2024 17:38

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General

Target

WaveInstaller.exe
Size

231KB
MD5

0eca651a9a275b0674a052b757f4b9ae
SHA1

d646b68d18a28ba263ea2930e58f0b30ac83b4a3
SHA256

64f6576c6db1eaaefbe0ab36e362592c8b27ff856cfcb29c032d06c1f289df1c
SHA512

d1f62b20625a982c3b59fdc56af47833b5f3e0ed2bb3aa03b1c8b71c3160999d87bc53f9f4f7bf1cdf6d45d87ff6e5c96a5cc0977c0da9b6ec1278b3c24870d5
SSDEEP

6144:RloZM+rIkd8g+EtXHkv/iD4hE3sR8e1mRi:joZtL+EP8h/B

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/2628-0-0x0000026AF6910000-0x0000026AF6950000-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
812	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
33	discord.com
34	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
8	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2544	wmic.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
4236	NOTEPAD.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
640	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
2628	WaveInstaller.exe
812	powershell.exe
812	powershell.exe
3628	powershell.exe
3628	powershell.exe
636	powershell.exe
636	powershell.exe
1220	powershell.exe
1220	powershell.exe
4816	powershell.exe
4816	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2628	WaveInstaller.exe
Token: SeIncreaseQuotaPrivilege	3888	wmic.exe
Token: SeSecurityPrivilege	3888	wmic.exe
Token: SeTakeOwnershipPrivilege	3888	wmic.exe
Token: SeLoadDriverPrivilege	3888	wmic.exe
Token: SeSystemProfilePrivilege	3888	wmic.exe
Token: SeSystemtimePrivilege	3888	wmic.exe
Token: SeProfSingleProcessPrivilege	3888	wmic.exe
Token: SeIncBasePriorityPrivilege	3888	wmic.exe
Token: SeCreatePagefilePrivilege	3888	wmic.exe
Token: SeBackupPrivilege	3888	wmic.exe
Token: SeRestorePrivilege	3888	wmic.exe
Token: SeShutdownPrivilege	3888	wmic.exe
Token: SeDebugPrivilege	3888	wmic.exe
Token: SeSystemEnvironmentPrivilege	3888	wmic.exe
Token: SeRemoteShutdownPrivilege	3888	wmic.exe
Token: SeUndockPrivilege	3888	wmic.exe
Token: SeManageVolumePrivilege	3888	wmic.exe
Token: 33	3888	wmic.exe
Token: 34	3888	wmic.exe
Token: 35	3888	wmic.exe
Token: 36	3888	wmic.exe
Token: SeIncreaseQuotaPrivilege	3888	wmic.exe
Token: SeSecurityPrivilege	3888	wmic.exe
Token: SeTakeOwnershipPrivilege	3888	wmic.exe
Token: SeLoadDriverPrivilege	3888	wmic.exe
Token: SeSystemProfilePrivilege	3888	wmic.exe
Token: SeSystemtimePrivilege	3888	wmic.exe
Token: SeProfSingleProcessPrivilege	3888	wmic.exe
Token: SeIncBasePriorityPrivilege	3888	wmic.exe
Token: SeCreatePagefilePrivilege	3888	wmic.exe
Token: SeBackupPrivilege	3888	wmic.exe
Token: SeRestorePrivilege	3888	wmic.exe
Token: SeShutdownPrivilege	3888	wmic.exe
Token: SeDebugPrivilege	3888	wmic.exe
Token: SeSystemEnvironmentPrivilege	3888	wmic.exe
Token: SeRemoteShutdownPrivilege	3888	wmic.exe
Token: SeUndockPrivilege	3888	wmic.exe
Token: SeManageVolumePrivilege	3888	wmic.exe
Token: 33	3888	wmic.exe
Token: 34	3888	wmic.exe
Token: 35	3888	wmic.exe
Token: 36	3888	wmic.exe
Token: SeDebugPrivilege	812	powershell.exe
Token: SeDebugPrivilege	3628	powershell.exe
Token: SeDebugPrivilege	636	powershell.exe
Token: SeDebugPrivilege	1220	powershell.exe
Token: SeIncreaseQuotaPrivilege	3312	wmic.exe
Token: SeSecurityPrivilege	3312	wmic.exe
Token: SeTakeOwnershipPrivilege	3312	wmic.exe
Token: SeLoadDriverPrivilege	3312	wmic.exe
Token: SeSystemProfilePrivilege	3312	wmic.exe
Token: SeSystemtimePrivilege	3312	wmic.exe
Token: SeProfSingleProcessPrivilege	3312	wmic.exe
Token: SeIncBasePriorityPrivilege	3312	wmic.exe
Token: SeCreatePagefilePrivilege	3312	wmic.exe
Token: SeBackupPrivilege	3312	wmic.exe
Token: SeRestorePrivilege	3312	wmic.exe
Token: SeShutdownPrivilege	3312	wmic.exe
Token: SeDebugPrivilege	3312	wmic.exe
Token: SeSystemEnvironmentPrivilege	3312	wmic.exe
Token: SeRemoteShutdownPrivilege	3312	wmic.exe
Token: SeUndockPrivilege	3312	wmic.exe
Token: SeManageVolumePrivilege	3312	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2628 wrote to memory of 3888	2628	WaveInstaller.exe	82
PID 2628 wrote to memory of 3888	2628	WaveInstaller.exe	82
PID 2628 wrote to memory of 2796	2628	WaveInstaller.exe	87
PID 2628 wrote to memory of 2796	2628	WaveInstaller.exe	87
PID 2628 wrote to memory of 812	2628	WaveInstaller.exe	89
PID 2628 wrote to memory of 812	2628	WaveInstaller.exe	89
PID 2628 wrote to memory of 3628	2628	WaveInstaller.exe	92
PID 2628 wrote to memory of 3628	2628	WaveInstaller.exe	92
PID 2628 wrote to memory of 636	2628	WaveInstaller.exe	94
PID 2628 wrote to memory of 636	2628	WaveInstaller.exe	94
PID 2628 wrote to memory of 1220	2628	WaveInstaller.exe	96
PID 2628 wrote to memory of 1220	2628	WaveInstaller.exe	96
PID 2628 wrote to memory of 3312	2628	WaveInstaller.exe	100
PID 2628 wrote to memory of 3312	2628	WaveInstaller.exe	100
PID 2628 wrote to memory of 1380	2628	WaveInstaller.exe	102
PID 2628 wrote to memory of 1380	2628	WaveInstaller.exe	102
PID 2628 wrote to memory of 1368	2628	WaveInstaller.exe	104
PID 2628 wrote to memory of 1368	2628	WaveInstaller.exe	104
PID 2628 wrote to memory of 4816	2628	WaveInstaller.exe	107
PID 2628 wrote to memory of 4816	2628	WaveInstaller.exe	107
PID 2628 wrote to memory of 2544	2628	WaveInstaller.exe	109
PID 2628 wrote to memory of 2544	2628	WaveInstaller.exe	109
PID 2628 wrote to memory of 1500	2628	WaveInstaller.exe	111
PID 2628 wrote to memory of 1500	2628	WaveInstaller.exe	111
PID 1500 wrote to memory of 640	1500	cmd.exe	113
PID 1500 wrote to memory of 640	1500	cmd.exe	113

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2796	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:2628
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3888
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\WaveInstaller.exe"
  2⤵
  - Views/modifies file attributes
  PID:2796
- 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:812
- 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:3628
- 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:636
- 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:1220
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3312
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1380
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1368
- 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:4816
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2544
- 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:1500
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:640

C:\Windows\system32\NOTEPAD.EXE
"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\ResizeEnter.txt
1⤵
- Opens file in notepad (likely ransom note)
PID:4236

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\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
2e907f77659a6601fcc408274894da2e

SHA1
9f5b72abef1cd7145bf37547cdb1b9254b4efe9d

SHA256
385da35673330e21ac02545220552fe301fe54dedefbdafc097ac4342a295233

SHA512
34fa0fff24f6550f55f828541aaefe5d75c86f8f0842d54b50065e9746f9662bb7209c74c9a9571540b9855bb3851f01db613190024e89b198d485bb5dc07721

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

Filesize
948B

MD5
0b8cb2e6dd5794b6a56a4bdbbd430fd7

SHA1
2b08e348c3489c6a35761af073018e3784c12074

SHA256
bcce0d44e33747e4c39df9afbd0a4e98a47ded0188375e4dfdd94cafbb366e1f

SHA512
15ce3b588aa80899f69b0313c7e188d886bddbd09783ca732ac33f9ae8e4e017a72b6f98919f581383a4582732575e5faedb0dea87e01cf2b657424945fdf4d2

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
08e2b6dc039d66a6bfa02fbaa9b86e1f

SHA1
1a45a88b900fc97183e50e3dd95deb5c086e2ca7

SHA256
13f0b2febb094f7d558d4325d06807162326f65290c90fa52fa1d3e4e4b35b14

SHA512
2e818787d6067890ec8586f9e4c2d459632e09c167749ff1b58fcaa273850b0ca61f0a468eda65a71358daa36a69ec7961b07cffe6ebcd7b8f79b2b796402891

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_2c0z0bsc.lju.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/812-12-0x000001C7F77F0000-0x000001C7F7812000-memory.dmp

Filesize
136KB

Download
memory/812-13-0x00007FFA6FAD0000-0x00007FFA70591000-memory.dmp

Filesize
10.8MB

Download
memory/812-14-0x00007FFA6FAD0000-0x00007FFA70591000-memory.dmp

Filesize
10.8MB

Download
memory/812-15-0x00007FFA6FAD0000-0x00007FFA70591000-memory.dmp

Filesize
10.8MB

Download
memory/812-18-0x00007FFA6FAD0000-0x00007FFA70591000-memory.dmp

Filesize
10.8MB

Download
memory/2628-34-0x0000026AF8830000-0x0000026AF8880000-memory.dmp

Filesize
320KB

Download
memory/2628-33-0x0000026AF90F0000-0x0000026AF9166000-memory.dmp

Filesize
472KB

Download
memory/2628-35-0x0000026AF9170000-0x0000026AF918E000-memory.dmp

Filesize
120KB

Download
memory/2628-1-0x00007FFA6FAD3000-0x00007FFA6FAD5000-memory.dmp

Filesize
8KB

Download
memory/2628-0-0x0000026AF6910000-0x0000026AF6950000-memory.dmp

Filesize
256KB

Download
memory/2628-72-0x0000026AF86B0000-0x0000026AF86BA000-memory.dmp

Filesize
40KB

Download
memory/2628-73-0x0000026AF8880000-0x0000026AF8892000-memory.dmp

Filesize
72KB

Download
memory/2628-2-0x00007FFA6FAD0000-0x00007FFA70591000-memory.dmp

Filesize
10.8MB

Download
memory/2628-93-0x00007FFA6FAD0000-0x00007FFA70591000-memory.dmp

Filesize
10.8MB

Download