umbral | 628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6

Analysis

max time kernel
137s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
06/05/2024, 12:05

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General

Target
Umbral.exe
Size 232KB
Sample240506-n86m2aec76
SHA256 628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6
MD5 afbe250f9d941daf1fc895e29d0b2821
SHA1 9aeaa55efa56702a0c2694ff2de3a5c6df7b03ac
SHA512 177ddc51032af306d32c0826efddfa3be5e68621b440be764fba7ad37fd982fb58d7e902e4eb258fe50bbd236f82457e45e7d12a885c78314b304e72fb0f2c94
SSDEEP 6144:tloZMDXU9Zx0kt8X0/PSCsMpwpf3tW+x5R0STTKN0b8e1mKISi:voZnf0kkPQwpf3tW+x5R0STTKm2
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/1968-0-0x000002053D150000-0x000002053D190000-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
4788	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

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
7	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
3396	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1900	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
1968	Umbral.exe
4788	powershell.exe
4788	powershell.exe
3112	powershell.exe
3112	powershell.exe
2996	powershell.exe
2996	powershell.exe
4320	powershell.exe
4320	powershell.exe
4448	powershell.exe
4448	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1968	Umbral.exe
Token: SeIncreaseQuotaPrivilege	1624	wmic.exe
Token: SeSecurityPrivilege	1624	wmic.exe
Token: SeTakeOwnershipPrivilege	1624	wmic.exe
Token: SeLoadDriverPrivilege	1624	wmic.exe
Token: SeSystemProfilePrivilege	1624	wmic.exe
Token: SeSystemtimePrivilege	1624	wmic.exe
Token: SeProfSingleProcessPrivilege	1624	wmic.exe
Token: SeIncBasePriorityPrivilege	1624	wmic.exe
Token: SeCreatePagefilePrivilege	1624	wmic.exe
Token: SeBackupPrivilege	1624	wmic.exe
Token: SeRestorePrivilege	1624	wmic.exe
Token: SeShutdownPrivilege	1624	wmic.exe
Token: SeDebugPrivilege	1624	wmic.exe
Token: SeSystemEnvironmentPrivilege	1624	wmic.exe
Token: SeRemoteShutdownPrivilege	1624	wmic.exe
Token: SeUndockPrivilege	1624	wmic.exe
Token: SeManageVolumePrivilege	1624	wmic.exe
Token: 33	1624	wmic.exe
Token: 34	1624	wmic.exe
Token: 35	1624	wmic.exe
Token: 36	1624	wmic.exe
Token: SeIncreaseQuotaPrivilege	1624	wmic.exe
Token: SeSecurityPrivilege	1624	wmic.exe
Token: SeTakeOwnershipPrivilege	1624	wmic.exe
Token: SeLoadDriverPrivilege	1624	wmic.exe
Token: SeSystemProfilePrivilege	1624	wmic.exe
Token: SeSystemtimePrivilege	1624	wmic.exe
Token: SeProfSingleProcessPrivilege	1624	wmic.exe
Token: SeIncBasePriorityPrivilege	1624	wmic.exe
Token: SeCreatePagefilePrivilege	1624	wmic.exe
Token: SeBackupPrivilege	1624	wmic.exe
Token: SeRestorePrivilege	1624	wmic.exe
Token: SeShutdownPrivilege	1624	wmic.exe
Token: SeDebugPrivilege	1624	wmic.exe
Token: SeSystemEnvironmentPrivilege	1624	wmic.exe
Token: SeRemoteShutdownPrivilege	1624	wmic.exe
Token: SeUndockPrivilege	1624	wmic.exe
Token: SeManageVolumePrivilege	1624	wmic.exe
Token: 33	1624	wmic.exe
Token: 34	1624	wmic.exe
Token: 35	1624	wmic.exe
Token: 36	1624	wmic.exe
Token: SeDebugPrivilege	4788	powershell.exe
Token: SeDebugPrivilege	3112	powershell.exe
Token: SeDebugPrivilege	2996	powershell.exe
Token: SeDebugPrivilege	4320	powershell.exe
Token: SeIncreaseQuotaPrivilege	4936	wmic.exe
Token: SeSecurityPrivilege	4936	wmic.exe
Token: SeTakeOwnershipPrivilege	4936	wmic.exe
Token: SeLoadDriverPrivilege	4936	wmic.exe
Token: SeSystemProfilePrivilege	4936	wmic.exe
Token: SeSystemtimePrivilege	4936	wmic.exe
Token: SeProfSingleProcessPrivilege	4936	wmic.exe
Token: SeIncBasePriorityPrivilege	4936	wmic.exe
Token: SeCreatePagefilePrivilege	4936	wmic.exe
Token: SeBackupPrivilege	4936	wmic.exe
Token: SeRestorePrivilege	4936	wmic.exe
Token: SeShutdownPrivilege	4936	wmic.exe
Token: SeDebugPrivilege	4936	wmic.exe
Token: SeSystemEnvironmentPrivilege	4936	wmic.exe
Token: SeRemoteShutdownPrivilege	4936	wmic.exe
Token: SeUndockPrivilege	4936	wmic.exe
Token: SeManageVolumePrivilege	4936	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1968 wrote to memory of 1624	1968	Umbral.exe	83
PID 1968 wrote to memory of 1624	1968	Umbral.exe	83
PID 1968 wrote to memory of 2112	1968	Umbral.exe	86
PID 1968 wrote to memory of 2112	1968	Umbral.exe	86
PID 1968 wrote to memory of 4788	1968	Umbral.exe	89
PID 1968 wrote to memory of 4788	1968	Umbral.exe	89
PID 1968 wrote to memory of 3112	1968	Umbral.exe	91
PID 1968 wrote to memory of 3112	1968	Umbral.exe	91
PID 1968 wrote to memory of 2996	1968	Umbral.exe	95
PID 1968 wrote to memory of 2996	1968	Umbral.exe	95
PID 1968 wrote to memory of 4320	1968	Umbral.exe	97
PID 1968 wrote to memory of 4320	1968	Umbral.exe	97
PID 1968 wrote to memory of 4936	1968	Umbral.exe	101
PID 1968 wrote to memory of 4936	1968	Umbral.exe	101
PID 1968 wrote to memory of 4532	1968	Umbral.exe	103
PID 1968 wrote to memory of 4532	1968	Umbral.exe	103
PID 1968 wrote to memory of 4600	1968	Umbral.exe	105
PID 1968 wrote to memory of 4600	1968	Umbral.exe	105
PID 1968 wrote to memory of 4448	1968	Umbral.exe	107
PID 1968 wrote to memory of 4448	1968	Umbral.exe	107
PID 1968 wrote to memory of 3396	1968	Umbral.exe	109
PID 1968 wrote to memory of 3396	1968	Umbral.exe	109
PID 1968 wrote to memory of 4776	1968	Umbral.exe	112
PID 1968 wrote to memory of 4776	1968	Umbral.exe	112
PID 4776 wrote to memory of 1900	4776	cmd.exe	114
PID 4776 wrote to memory of 1900	4776	cmd.exe	114

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2112	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:1968
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1624
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:2112
- 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:4788
- 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:3112
- 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:2996
- 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:4320
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4936
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:4532
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4600
- 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:4448
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:3396
- 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:4776
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:1900

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

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

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d
MD5 6d3e9c29fe44e90aae6ed30ccf799ca8
SHA1 c7974ef72264bbdf13a2793ccf1aed11bc565dce
SHA512 60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 948B
SHA256 4640ba4001fd16a593315299cbdd4988dc2c7075820687f1018aac40aca95c26
MD5 c65738617888921a153bd9b1ef516ee7
SHA1 5245e71ea3c181d76320c857b639272ac9e079b1
SHA512 2e2a0ebd93f9d8dd07a7599054bce232683e9add9a35e77b584618040bcfd84a42545352519ec4736cc379002210b6f3ed2d905591c6925c0981b0392b495bfa
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 533c8470b41084e40c5660569ebbdb7496520d449629a235e8053e84025f348a
MD5 88be3bc8a7f90e3953298c0fdbec4d72
SHA1 f4969784ad421cc80ef45608727aacd0f6bf2e4b
SHA512 4fce64e2dacddbc03314048fef1ce356ee2647c14733da121c23c65507eeb8d721d6b690ad5463319b364dc4fa95904ad6ab096907f32918e3406ef438a6ef7c
MD5 SHA1 SHA512

Submit Download

StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 f0815f797b0c1829745dd65985f28d459688f91ceb2f3d76fed2d4309589bcde
MD5 2984662ba3f86d7fcf26758b5b76754d
SHA1 bc2a43ffd898222ee84406313f3834f226928379
SHA512 a06251a7a14559ebf5627a3c6b03fda9ded1d4ee44991283c824ccf5011cdf67665696d2d9b23507cbb3e3b9943b9e9f79ef28d3657eb61fb99920225417ab11
MD5 SHA1 SHA512

Submit Download

__PSScriptPolicyTest_sve0pwyh.zeq.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_sve0pwyh.zeq.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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memory/1968-72-0x000002053F140000-0x000002053F152000-memory.dmp

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memory/1968-35-0x000002053EEF0000-0x000002053EF0E000-memory.dmp

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memory/1968-90-0x00007FFE30160000-0x00007FFE30C21000-memory.dmp

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memory/1968-71-0x000002053EF30000-0x000002053EF3A000-memory.dmp

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memory/1968-2-0x00007FFE30160000-0x00007FFE30C21000-memory.dmp

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memory/1968-33-0x000002053F0C0000-0x000002053F136000-memory.dmp

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memory/1968-34-0x0000020557930000-0x0000020557980000-memory.dmp

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memory/1968-0-0x000002053D150000-0x000002053D190000-memory.dmp

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memory/1968-1-0x00007FFE30163000-0x00007FFE30165000-memory.dmp

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memory/4788-6-0x00007FFE30160000-0x00007FFE30C21000-memory.dmp

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memory/4788-4-0x0000020E48CA0000-0x0000020E48CC2000-memory.dmp

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memory/4788-3-0x00007FFE30160000-0x00007FFE30C21000-memory.dmp

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memory/4788-5-0x00007FFE30160000-0x00007FFE30C21000-memory.dmp

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memory/4788-18-0x00007FFE30160000-0x00007FFE30C21000-memory.dmp

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