umbral | 928ff5c9bb5e02499ed4611c84ff1b2b8bd498f6db9451f8d7f5fa78202d37ef

Analysis

max time kernel
299s
max time network
202s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
05-06-2024 19:41

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General

Target

Umbral.exe
Size

231KB
MD5

c3aa0f5ac11d11f2a741c0502d4cd3a2
SHA1

96736e1e76a2f59c460a85472a58bc98dc8bd084
SHA256

928ff5c9bb5e02499ed4611c84ff1b2b8bd498f6db9451f8d7f5fa78202d37ef
SHA512

854b49c85e976a101d8e6c1fe2cf14f7cb99f5025d29a2f0636796fec9d745bafe606223de3b79339a7f98b746f005aec72483d984620a99648ec4ea9c649d21
SSDEEP

6144:xloZM+rIkd8g+EtXHkv/iD4alC0ad1+57mEl5QIf7tLJh8e1mAai:DoZtL+EP8alC0ad1+57mEl5QIRLzLf

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/3364-1-0x000001C094D90000-0x000001C094DD0000-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
4884	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	Umbral.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
8	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4244	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
5088	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
3364	Umbral.exe
4884	powershell.exe
4884	powershell.exe
380	powershell.exe
380	powershell.exe
1000	powershell.exe
1000	powershell.exe
2620	powershell.exe
2620	powershell.exe
3112	powershell.exe
3112	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3364	Umbral.exe
Token: SeIncreaseQuotaPrivilege	2868	wmic.exe
Token: SeSecurityPrivilege	2868	wmic.exe
Token: SeTakeOwnershipPrivilege	2868	wmic.exe
Token: SeLoadDriverPrivilege	2868	wmic.exe
Token: SeSystemProfilePrivilege	2868	wmic.exe
Token: SeSystemtimePrivilege	2868	wmic.exe
Token: SeProfSingleProcessPrivilege	2868	wmic.exe
Token: SeIncBasePriorityPrivilege	2868	wmic.exe
Token: SeCreatePagefilePrivilege	2868	wmic.exe
Token: SeBackupPrivilege	2868	wmic.exe
Token: SeRestorePrivilege	2868	wmic.exe
Token: SeShutdownPrivilege	2868	wmic.exe
Token: SeDebugPrivilege	2868	wmic.exe
Token: SeSystemEnvironmentPrivilege	2868	wmic.exe
Token: SeRemoteShutdownPrivilege	2868	wmic.exe
Token: SeUndockPrivilege	2868	wmic.exe
Token: SeManageVolumePrivilege	2868	wmic.exe
Token: 33	2868	wmic.exe
Token: 34	2868	wmic.exe
Token: 35	2868	wmic.exe
Token: 36	2868	wmic.exe
Token: SeIncreaseQuotaPrivilege	2868	wmic.exe
Token: SeSecurityPrivilege	2868	wmic.exe
Token: SeTakeOwnershipPrivilege	2868	wmic.exe
Token: SeLoadDriverPrivilege	2868	wmic.exe
Token: SeSystemProfilePrivilege	2868	wmic.exe
Token: SeSystemtimePrivilege	2868	wmic.exe
Token: SeProfSingleProcessPrivilege	2868	wmic.exe
Token: SeIncBasePriorityPrivilege	2868	wmic.exe
Token: SeCreatePagefilePrivilege	2868	wmic.exe
Token: SeBackupPrivilege	2868	wmic.exe
Token: SeRestorePrivilege	2868	wmic.exe
Token: SeShutdownPrivilege	2868	wmic.exe
Token: SeDebugPrivilege	2868	wmic.exe
Token: SeSystemEnvironmentPrivilege	2868	wmic.exe
Token: SeRemoteShutdownPrivilege	2868	wmic.exe
Token: SeUndockPrivilege	2868	wmic.exe
Token: SeManageVolumePrivilege	2868	wmic.exe
Token: 33	2868	wmic.exe
Token: 34	2868	wmic.exe
Token: 35	2868	wmic.exe
Token: 36	2868	wmic.exe
Token: SeDebugPrivilege	4884	powershell.exe
Token: SeDebugPrivilege	380	powershell.exe
Token: SeDebugPrivilege	1000	powershell.exe
Token: SeDebugPrivilege	2620	powershell.exe
Token: SeIncreaseQuotaPrivilege	1872	wmic.exe
Token: SeSecurityPrivilege	1872	wmic.exe
Token: SeTakeOwnershipPrivilege	1872	wmic.exe
Token: SeLoadDriverPrivilege	1872	wmic.exe
Token: SeSystemProfilePrivilege	1872	wmic.exe
Token: SeSystemtimePrivilege	1872	wmic.exe
Token: SeProfSingleProcessPrivilege	1872	wmic.exe
Token: SeIncBasePriorityPrivilege	1872	wmic.exe
Token: SeCreatePagefilePrivilege	1872	wmic.exe
Token: SeBackupPrivilege	1872	wmic.exe
Token: SeRestorePrivilege	1872	wmic.exe
Token: SeShutdownPrivilege	1872	wmic.exe
Token: SeDebugPrivilege	1872	wmic.exe
Token: SeSystemEnvironmentPrivilege	1872	wmic.exe
Token: SeRemoteShutdownPrivilege	1872	wmic.exe
Token: SeUndockPrivilege	1872	wmic.exe
Token: SeManageVolumePrivilege	1872	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3364 wrote to memory of 2868	3364	Umbral.exe	85
PID 3364 wrote to memory of 2868	3364	Umbral.exe	85
PID 3364 wrote to memory of 2888	3364	Umbral.exe	88
PID 3364 wrote to memory of 2888	3364	Umbral.exe	88
PID 3364 wrote to memory of 4884	3364	Umbral.exe	90
PID 3364 wrote to memory of 4884	3364	Umbral.exe	90
PID 3364 wrote to memory of 380	3364	Umbral.exe	93
PID 3364 wrote to memory of 380	3364	Umbral.exe	93
PID 3364 wrote to memory of 1000	3364	Umbral.exe	97
PID 3364 wrote to memory of 1000	3364	Umbral.exe	97
PID 3364 wrote to memory of 2620	3364	Umbral.exe	99
PID 3364 wrote to memory of 2620	3364	Umbral.exe	99
PID 3364 wrote to memory of 1872	3364	Umbral.exe	103
PID 3364 wrote to memory of 1872	3364	Umbral.exe	103
PID 3364 wrote to memory of 224	3364	Umbral.exe	105
PID 3364 wrote to memory of 224	3364	Umbral.exe	105
PID 3364 wrote to memory of 2168	3364	Umbral.exe	107
PID 3364 wrote to memory of 2168	3364	Umbral.exe	107
PID 3364 wrote to memory of 3112	3364	Umbral.exe	109
PID 3364 wrote to memory of 3112	3364	Umbral.exe	109
PID 3364 wrote to memory of 4244	3364	Umbral.exe	112
PID 3364 wrote to memory of 4244	3364	Umbral.exe	112
PID 3364 wrote to memory of 1012	3364	Umbral.exe	114
PID 3364 wrote to memory of 1012	3364	Umbral.exe	114
PID 1012 wrote to memory of 5088	1012	cmd.exe	116
PID 1012 wrote to memory of 5088	1012	cmd.exe	116

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2888	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Umbral.exe
"C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3364
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2868
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:2888
- 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:4884
- 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:380
- 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:1000
- 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:2620
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1872
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:224
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2168
- 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:3112
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4244
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Umbral.exe" && pause
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1012
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:5088

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
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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

Filesize
948B

MD5
1a34cb9b3e0b5768380feebb6df1bc0f

SHA1
75087caca408eefca36664e90a8677d0142303a1

SHA256
15a30ccbd965ca71adc58b064001c32d3303a8c6376e3e17386fba0c4a936fca

SHA512
2e6c333ccbc604b3f56010de8dee954393ebe296c32d48a9213d70aed6bed44ac9c3ab668274bf6e420f6009f969bc436f734b94ee0f13c6915c5368a776104d

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
3d6dcdff0b5a084a623a8f2b5b6b3378

SHA1
2394f0aee74bcaa6ef70d5cc9c893a6f94cf4202

SHA256
da34d5479d54516e903b7c7c15b975410734e633c0f14767f68c8056cd203fe8

SHA512
696889d35e151382fd9f132a3814b0b2a38747214ba444a87bf9950308f226e56d9bc27497512e3b0ff6fb328cfb0e19a5253054d1278514a295efa4384b0fcf

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_n5gip1vd.4lo.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3364-71-0x000001C0AF460000-0x000001C0AF46A000-memory.dmp

Filesize
40KB

Download
memory/3364-35-0x000001C0AF5B0000-0x000001C0AF5CE000-memory.dmp

Filesize
120KB

Download
memory/3364-90-0x00007FFA85650000-0x00007FFA86111000-memory.dmp

Filesize
10.8MB

Download
memory/3364-72-0x000001C0AF590000-0x000001C0AF5A2000-memory.dmp

Filesize
72KB

Download
memory/3364-2-0x00007FFA85650000-0x00007FFA86111000-memory.dmp

Filesize
10.8MB

Download
memory/3364-33-0x000001C0AF4C0000-0x000001C0AF536000-memory.dmp

Filesize
472KB

Download
memory/3364-34-0x000001C0AF540000-0x000001C0AF590000-memory.dmp

Filesize
320KB

Download
memory/3364-0-0x00007FFA85653000-0x00007FFA85655000-memory.dmp

Filesize
8KB

Download
memory/3364-1-0x000001C094D90000-0x000001C094DD0000-memory.dmp

Filesize
256KB

Download
memory/4884-15-0x00007FFA85650000-0x00007FFA86111000-memory.dmp

Filesize
10.8MB

Download
memory/4884-13-0x00007FFA85650000-0x00007FFA86111000-memory.dmp

Filesize
10.8MB

Download
memory/4884-14-0x00007FFA85650000-0x00007FFA86111000-memory.dmp

Filesize
10.8MB

Download
memory/4884-3-0x000001791CE90000-0x000001791CEB2000-memory.dmp

Filesize
136KB

Download
memory/4884-18-0x00007FFA85650000-0x00007FFA86111000-memory.dmp

Filesize
10.8MB

Download