umbral | e5da8ebc635776269ddceed41b6b6c0860071dafbe121b3fa17e63d01effd26c

Analysis

max time kernel
121s
max time network
126s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
26-05-2024 17:59

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General

Target

Umbral.exe
Size

231KB
MD5

e9e39a33854ca8af45f6048dd49f265b
SHA1

d19011ba34adf3135335aa9839d24e1b5c5dde71
SHA256

e5da8ebc635776269ddceed41b6b6c0860071dafbe121b3fa17e63d01effd26c
SHA512

703fdc9b9d086329a7273138920904fa0bf3d9917c0db74fcba1853bf1ecd42fd3144725238104e98ebac95f31da5d38551b3f97fb6c72ffdd0c60dbdc4d35cf
SSDEEP

6144:YOSAnvuqXLUirFMWyW1bYcUNSzNc0jqatc2J8e1mvSTU:vDqyFMWyW1bYcUNSzNc0jqIj2T

Score

10^/10

umbral execution stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2204-1-0x0000000000920000-0x0000000000960000-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
2036	powershell.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
6	discord.com
7	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
4	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1664	wmic.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2036	powershell.exe
2908	powershell.exe
2888	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2204	Umbral.exe
Token: SeDebugPrivilege	2036	powershell.exe
Token: SeDebugPrivilege	2908	powershell.exe
Token: SeIncreaseQuotaPrivilege	1524	wmic.exe
Token: SeSecurityPrivilege	1524	wmic.exe
Token: SeTakeOwnershipPrivilege	1524	wmic.exe
Token: SeLoadDriverPrivilege	1524	wmic.exe
Token: SeSystemProfilePrivilege	1524	wmic.exe
Token: SeSystemtimePrivilege	1524	wmic.exe
Token: SeProfSingleProcessPrivilege	1524	wmic.exe
Token: SeIncBasePriorityPrivilege	1524	wmic.exe
Token: SeCreatePagefilePrivilege	1524	wmic.exe
Token: SeBackupPrivilege	1524	wmic.exe
Token: SeRestorePrivilege	1524	wmic.exe
Token: SeShutdownPrivilege	1524	wmic.exe
Token: SeDebugPrivilege	1524	wmic.exe
Token: SeSystemEnvironmentPrivilege	1524	wmic.exe
Token: SeRemoteShutdownPrivilege	1524	wmic.exe
Token: SeUndockPrivilege	1524	wmic.exe
Token: SeManageVolumePrivilege	1524	wmic.exe
Token: 33	1524	wmic.exe
Token: 34	1524	wmic.exe
Token: 35	1524	wmic.exe
Token: SeIncreaseQuotaPrivilege	1524	wmic.exe
Token: SeSecurityPrivilege	1524	wmic.exe
Token: SeTakeOwnershipPrivilege	1524	wmic.exe
Token: SeLoadDriverPrivilege	1524	wmic.exe
Token: SeSystemProfilePrivilege	1524	wmic.exe
Token: SeSystemtimePrivilege	1524	wmic.exe
Token: SeProfSingleProcessPrivilege	1524	wmic.exe
Token: SeIncBasePriorityPrivilege	1524	wmic.exe
Token: SeCreatePagefilePrivilege	1524	wmic.exe
Token: SeBackupPrivilege	1524	wmic.exe
Token: SeRestorePrivilege	1524	wmic.exe
Token: SeShutdownPrivilege	1524	wmic.exe
Token: SeDebugPrivilege	1524	wmic.exe
Token: SeSystemEnvironmentPrivilege	1524	wmic.exe
Token: SeRemoteShutdownPrivilege	1524	wmic.exe
Token: SeUndockPrivilege	1524	wmic.exe
Token: SeManageVolumePrivilege	1524	wmic.exe
Token: 33	1524	wmic.exe
Token: 34	1524	wmic.exe
Token: 35	1524	wmic.exe
Token: SeIncreaseQuotaPrivilege	2396	wmic.exe
Token: SeSecurityPrivilege	2396	wmic.exe
Token: SeTakeOwnershipPrivilege	2396	wmic.exe
Token: SeLoadDriverPrivilege	2396	wmic.exe
Token: SeSystemProfilePrivilege	2396	wmic.exe
Token: SeSystemtimePrivilege	2396	wmic.exe
Token: SeProfSingleProcessPrivilege	2396	wmic.exe
Token: SeIncBasePriorityPrivilege	2396	wmic.exe
Token: SeCreatePagefilePrivilege	2396	wmic.exe
Token: SeBackupPrivilege	2396	wmic.exe
Token: SeRestorePrivilege	2396	wmic.exe
Token: SeShutdownPrivilege	2396	wmic.exe
Token: SeDebugPrivilege	2396	wmic.exe
Token: SeSystemEnvironmentPrivilege	2396	wmic.exe
Token: SeRemoteShutdownPrivilege	2396	wmic.exe
Token: SeUndockPrivilege	2396	wmic.exe
Token: SeManageVolumePrivilege	2396	wmic.exe
Token: 33	2396	wmic.exe
Token: 34	2396	wmic.exe
Token: 35	2396	wmic.exe
Token: SeIncreaseQuotaPrivilege	2396	wmic.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2204 wrote to memory of 2036	2204	Umbral.exe	28
PID 2204 wrote to memory of 2036	2204	Umbral.exe	28
PID 2204 wrote to memory of 2036	2204	Umbral.exe	28
PID 2204 wrote to memory of 2908	2204	Umbral.exe	30
PID 2204 wrote to memory of 2908	2204	Umbral.exe	30
PID 2204 wrote to memory of 2908	2204	Umbral.exe	30
PID 2204 wrote to memory of 1524	2204	Umbral.exe	32
PID 2204 wrote to memory of 1524	2204	Umbral.exe	32
PID 2204 wrote to memory of 1524	2204	Umbral.exe	32
PID 2204 wrote to memory of 2396	2204	Umbral.exe	35
PID 2204 wrote to memory of 2396	2204	Umbral.exe	35
PID 2204 wrote to memory of 2396	2204	Umbral.exe	35
PID 2204 wrote to memory of 1748	2204	Umbral.exe	37
PID 2204 wrote to memory of 1748	2204	Umbral.exe	37
PID 2204 wrote to memory of 1748	2204	Umbral.exe	37
PID 2204 wrote to memory of 2888	2204	Umbral.exe	39
PID 2204 wrote to memory of 2888	2204	Umbral.exe	39
PID 2204 wrote to memory of 2888	2204	Umbral.exe	39
PID 2204 wrote to memory of 1664	2204	Umbral.exe	41
PID 2204 wrote to memory of 1664	2204	Umbral.exe	41
PID 2204 wrote to memory of 1664	2204	Umbral.exe	41

C:\Users\Admin\AppData\Local\Temp\Umbral.exe
"C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2204
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Umbral.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2036
- 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:2908
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1524
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2396
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1748
- 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:2888
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1664

C:\Windows\SysWOW64\DllHost.exe
C:\Windows\SysWOW64\DllHost.exe /Processid:{06622D85-6856-4460-8DE1-A81921B41C4B}
1⤵
PID:1676

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

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
40d4830f6bb9269550e23b7be4072d10

SHA1
e9286b6613a76e9c5dc671bb33fa23f616f9f866

SHA256
1416aa7b2f0077c8e6fde101665b85fe813f0768ae86dc5ec701fa2347684b3d

SHA512
d1b170e8fc836830513ec35e5d1c95e885cfab32f6025424b36041d0a997218494b92bb543d8fdb8fbd8d0ffb19d02d52cc460d548d07520d834e037a87d00e5

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memory/2036-12-0x000007FEED9B0000-0x000007FEEE34D000-memory.dmp

Filesize
9.6MB

Download
memory/2036-13-0x000007FEED9B0000-0x000007FEEE34D000-memory.dmp

Filesize
9.6MB

Download
memory/2036-7-0x000007FEEDC6E000-0x000007FEEDC6F000-memory.dmp

Filesize
4KB

Download
memory/2036-8-0x000000001B650000-0x000000001B932000-memory.dmp

Filesize
2.9MB

Download
memory/2036-9-0x0000000002770000-0x0000000002778000-memory.dmp

Filesize
32KB

Download
memory/2036-10-0x000007FEED9B0000-0x000007FEEE34D000-memory.dmp

Filesize
9.6MB

Download
memory/2036-11-0x000007FEED9B0000-0x000007FEEE34D000-memory.dmp

Filesize
9.6MB

Download
memory/2204-0-0x000007FEF58E3000-0x000007FEF58E4000-memory.dmp

Filesize
4KB

Download
memory/2204-2-0x000007FEF58E0000-0x000007FEF62CC000-memory.dmp

Filesize
9.9MB

Download
memory/2204-1-0x0000000000920000-0x0000000000960000-memory.dmp

Filesize
256KB

Download
memory/2204-33-0x000007FEF58E3000-0x000007FEF58E4000-memory.dmp

Filesize
4KB

Download
memory/2204-34-0x000007FEF58E0000-0x000007FEF62CC000-memory.dmp

Filesize
9.9MB

Download
memory/2888-29-0x000000001B790000-0x000000001BA72000-memory.dmp

Filesize
2.9MB

Download
memory/2908-19-0x000000001B6E0000-0x000000001B9C2000-memory.dmp

Filesize
2.9MB

Download
memory/2908-20-0x0000000002690000-0x0000000002698000-memory.dmp

Filesize
32KB

Download