umbral | 4916686177420dca945e81aebaf2fc098c21ddb74fbbf9d0f6f2adaf37f218e8

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09-08-2024 17:20

240809-vwc9aataqn 10

09-08-2024 17:16

240809-vtg5fsxblb 10

08-08-2024 19:08

240808-xtpkmsxgmn 10

Analysis

max time kernel
94s
max time network
95s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
08-08-2024 19:08

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General

Target

Nowatermarks.exe
Size

227KB
MD5

926ac9e42778634f5c2580a913d83f62
SHA1

e36c92f542a4c010c9cbbdb91df84ec2e16ac62f
SHA256

4916686177420dca945e81aebaf2fc098c21ddb74fbbf9d0f6f2adaf37f218e8
SHA512

e415af55a761d060dfd56f77491d853edb806c5e2337460fb7df8ac76f986e7a89904caa913b56fcbf19e0f3e084a71ef1a13336cf7aa73cdd52c342ff8375c6
SSDEEP

6144:+loZMCrIkd8g+EtXHkv/iD475jhDJ6idOIJbGmTLFb8e1mYi:ooZZL+EP875jhDJ6idOIJbGmTJu

Score

10^/10

umbral credential_access execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/1836-0-0x000001EDE5040000-0x000001EDE5080000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
4988	powershell.exe
4116	powershell.exe
2612	powershell.exe
4496	powershell.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
23	discord.com
24	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
20	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4924	wmic.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
4988	powershell.exe
4988	powershell.exe
4116	powershell.exe
4116	powershell.exe
2612	powershell.exe
2612	powershell.exe
5032	powershell.exe
5032	powershell.exe
4496	powershell.exe
4496	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1836	Nowatermarks.exe
Token: SeDebugPrivilege	4988	powershell.exe
Token: SeDebugPrivilege	4116	powershell.exe
Token: SeDebugPrivilege	2612	powershell.exe
Token: SeDebugPrivilege	5032	powershell.exe
Token: SeIncreaseQuotaPrivilege	3556	wmic.exe
Token: SeSecurityPrivilege	3556	wmic.exe
Token: SeTakeOwnershipPrivilege	3556	wmic.exe
Token: SeLoadDriverPrivilege	3556	wmic.exe
Token: SeSystemProfilePrivilege	3556	wmic.exe
Token: SeSystemtimePrivilege	3556	wmic.exe
Token: SeProfSingleProcessPrivilege	3556	wmic.exe
Token: SeIncBasePriorityPrivilege	3556	wmic.exe
Token: SeCreatePagefilePrivilege	3556	wmic.exe
Token: SeBackupPrivilege	3556	wmic.exe
Token: SeRestorePrivilege	3556	wmic.exe
Token: SeShutdownPrivilege	3556	wmic.exe
Token: SeDebugPrivilege	3556	wmic.exe
Token: SeSystemEnvironmentPrivilege	3556	wmic.exe
Token: SeRemoteShutdownPrivilege	3556	wmic.exe
Token: SeUndockPrivilege	3556	wmic.exe
Token: SeManageVolumePrivilege	3556	wmic.exe
Token: 33	3556	wmic.exe
Token: 34	3556	wmic.exe
Token: 35	3556	wmic.exe
Token: 36	3556	wmic.exe
Token: SeIncreaseQuotaPrivilege	3556	wmic.exe
Token: SeSecurityPrivilege	3556	wmic.exe
Token: SeTakeOwnershipPrivilege	3556	wmic.exe
Token: SeLoadDriverPrivilege	3556	wmic.exe
Token: SeSystemProfilePrivilege	3556	wmic.exe
Token: SeSystemtimePrivilege	3556	wmic.exe
Token: SeProfSingleProcessPrivilege	3556	wmic.exe
Token: SeIncBasePriorityPrivilege	3556	wmic.exe
Token: SeCreatePagefilePrivilege	3556	wmic.exe
Token: SeBackupPrivilege	3556	wmic.exe
Token: SeRestorePrivilege	3556	wmic.exe
Token: SeShutdownPrivilege	3556	wmic.exe
Token: SeDebugPrivilege	3556	wmic.exe
Token: SeSystemEnvironmentPrivilege	3556	wmic.exe
Token: SeRemoteShutdownPrivilege	3556	wmic.exe
Token: SeUndockPrivilege	3556	wmic.exe
Token: SeManageVolumePrivilege	3556	wmic.exe
Token: 33	3556	wmic.exe
Token: 34	3556	wmic.exe
Token: 35	3556	wmic.exe
Token: 36	3556	wmic.exe
Token: SeIncreaseQuotaPrivilege	4612	wmic.exe
Token: SeSecurityPrivilege	4612	wmic.exe
Token: SeTakeOwnershipPrivilege	4612	wmic.exe
Token: SeLoadDriverPrivilege	4612	wmic.exe
Token: SeSystemProfilePrivilege	4612	wmic.exe
Token: SeSystemtimePrivilege	4612	wmic.exe
Token: SeProfSingleProcessPrivilege	4612	wmic.exe
Token: SeIncBasePriorityPrivilege	4612	wmic.exe
Token: SeCreatePagefilePrivilege	4612	wmic.exe
Token: SeBackupPrivilege	4612	wmic.exe
Token: SeRestorePrivilege	4612	wmic.exe
Token: SeShutdownPrivilege	4612	wmic.exe
Token: SeDebugPrivilege	4612	wmic.exe
Token: SeSystemEnvironmentPrivilege	4612	wmic.exe
Token: SeRemoteShutdownPrivilege	4612	wmic.exe
Token: SeUndockPrivilege	4612	wmic.exe
Token: SeManageVolumePrivilege	4612	wmic.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 1836 wrote to memory of 4988	1836	Nowatermarks.exe	85
PID 1836 wrote to memory of 4988	1836	Nowatermarks.exe	85
PID 1836 wrote to memory of 4116	1836	Nowatermarks.exe	88
PID 1836 wrote to memory of 4116	1836	Nowatermarks.exe	88
PID 1836 wrote to memory of 2612	1836	Nowatermarks.exe	90
PID 1836 wrote to memory of 2612	1836	Nowatermarks.exe	90
PID 1836 wrote to memory of 5032	1836	Nowatermarks.exe	92
PID 1836 wrote to memory of 5032	1836	Nowatermarks.exe	92
PID 1836 wrote to memory of 3556	1836	Nowatermarks.exe	94
PID 1836 wrote to memory of 3556	1836	Nowatermarks.exe	94
PID 1836 wrote to memory of 4612	1836	Nowatermarks.exe	97
PID 1836 wrote to memory of 4612	1836	Nowatermarks.exe	97
PID 1836 wrote to memory of 4188	1836	Nowatermarks.exe	99
PID 1836 wrote to memory of 4188	1836	Nowatermarks.exe	99
PID 1836 wrote to memory of 4496	1836	Nowatermarks.exe	101
PID 1836 wrote to memory of 4496	1836	Nowatermarks.exe	101
PID 1836 wrote to memory of 4924	1836	Nowatermarks.exe	103
PID 1836 wrote to memory of 4924	1836	Nowatermarks.exe	103

C:\Users\Admin\AppData\Local\Temp\Nowatermarks.exe
"C:\Users\Admin\AppData\Local\Temp\Nowatermarks.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1836
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Nowatermarks.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4988
- 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⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4116
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2612
- 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:5032
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3556
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4612
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4188
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  PID:4496
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4924

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

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

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
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
948B

MD5
c523adc639d16ffb0f96cebc63eed858

SHA1
12ff3728fe7a266d00bea61357e168d1ac35fb8b

SHA256
3f3c9377b171cf14fcf2bfe2ef6ab7753c1470c8fe803fb73317fa3732c55df1

SHA512
36dd1d5df9f67a708087ae024f4088fbe6ed11859c65c896f4c7b40631e418646295078abe0bd1e7062b3dd5f333d8cf86a8542ef719e4b14feec877c60839ba

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

Filesize
1KB

MD5
f2d9d25bcc24f33b708fb6931e895e35

SHA1
53612e5ea30001a97d9816c6db570540095cedce

SHA256
56ff498d31e8cc631475f40881380eb8cb7ab91e73d59e76e60a1b3af7da56d3

SHA512
e8f577b090d8227a082024035c7227f3f7fa8d843b0cec410b2db20dbd6576da304ac2894af7cc23c4d305452081b0ece1f72c6dcf8287865f908c9d1e73c8da

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

Filesize
1KB

MD5
3eab1ce98d5aabd7d87ff64d1b085dd9

SHA1
fc3275b3d2683af194a952b36dec320c3ca4ab60

SHA256
9ecc883e408b3e9ec337831c40537dfa254cc8aa9d2323f785979dce2e15455a

SHA512
9a6224df5786e932dbacfaafd04125e202945593c11c720e66888ff1393b7088e2b8aea73f3bcca10f969fd3a9c948ee63add1762f8808e36aeb34cae38c8686

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ijebriro.k2v.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1836-69-0x000001EDE6CE0000-0x000001EDE6CEA000-memory.dmp

Filesize
40KB

Download
memory/1836-33-0x000001EDFF800000-0x000001EDFF81E000-memory.dmp

Filesize
120KB

Download
memory/1836-88-0x00007FF99E430000-0x00007FF99EEF1000-memory.dmp

Filesize
10.8MB

Download
memory/1836-70-0x000001EDFFA20000-0x000001EDFFA32000-memory.dmp

Filesize
72KB

Download
memory/1836-2-0x00007FF99E430000-0x00007FF99EEF1000-memory.dmp

Filesize
10.8MB

Download
memory/1836-31-0x000001EDFF780000-0x000001EDFF7F6000-memory.dmp

Filesize
472KB

Download
memory/1836-32-0x000001EDE6CF0000-0x000001EDE6D40000-memory.dmp

Filesize
320KB

Download
memory/1836-0-0x000001EDE5040000-0x000001EDE5080000-memory.dmp

Filesize
256KB

Download
memory/1836-1-0x00007FF99E433000-0x00007FF99E435000-memory.dmp

Filesize
8KB

Download
memory/4988-15-0x00007FF99E430000-0x00007FF99EEF1000-memory.dmp

Filesize
10.8MB

Download
memory/4988-14-0x00007FF99E430000-0x00007FF99EEF1000-memory.dmp

Filesize
10.8MB

Download
memory/4988-3-0x000001CB7EB60000-0x000001CB7EB82000-memory.dmp

Filesize
136KB

Download
memory/4988-13-0x00007FF99E430000-0x00007FF99EEF1000-memory.dmp

Filesize
10.8MB

Download
memory/4988-18-0x00007FF99E430000-0x00007FF99EEF1000-memory.dmp

Filesize
10.8MB

Download