umbral | 8ff6ca14eac4b42391697608e3cf0c6fe433e58ac965bef66ec32888305464d9

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
26-08-2024 20:15

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General

Target

Umbral.exe
Size

232KB
MD5

b19a46354270983374d8a6c2e1de3eff
SHA1

1e0c163fd3d63d26dd3f271a3e348b3d69140c7d
SHA256

8ff6ca14eac4b42391697608e3cf0c6fe433e58ac965bef66ec32888305464d9
SHA512

829a6b6c93c5f98ac8b2633608c6d05247e8b84b9eb188ffaf69a6339019fd92772730325de9ef378812693203abe19cff289b1feb7ca8149dcbeb857d307b6d
SSDEEP

6144:BloZM+rIkd8g+EtXHkv/iD4yF4W4+ZRS23q459cTub8e1mQvi:zoZtL+EP8yF4W4+ZRS23q459cmW

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/2420-1-0x0000022A54500000-0x0000022A54540000-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
2260	powershell.exe
4372	powershell.exe
4480	powershell.exe
3280	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
32	discord.com
31	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
9	ip-api.com

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
2144	cmd.exe
4532	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
3228	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4532	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
2420	Umbral.exe
2260	powershell.exe
2260	powershell.exe
4372	powershell.exe
4372	powershell.exe
4480	powershell.exe
4480	powershell.exe
1544	powershell.exe
1544	powershell.exe
3280	powershell.exe
3280	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2420	Umbral.exe
Token: SeIncreaseQuotaPrivilege	3344	wmic.exe
Token: SeSecurityPrivilege	3344	wmic.exe
Token: SeTakeOwnershipPrivilege	3344	wmic.exe
Token: SeLoadDriverPrivilege	3344	wmic.exe
Token: SeSystemProfilePrivilege	3344	wmic.exe
Token: SeSystemtimePrivilege	3344	wmic.exe
Token: SeProfSingleProcessPrivilege	3344	wmic.exe
Token: SeIncBasePriorityPrivilege	3344	wmic.exe
Token: SeCreatePagefilePrivilege	3344	wmic.exe
Token: SeBackupPrivilege	3344	wmic.exe
Token: SeRestorePrivilege	3344	wmic.exe
Token: SeShutdownPrivilege	3344	wmic.exe
Token: SeDebugPrivilege	3344	wmic.exe
Token: SeSystemEnvironmentPrivilege	3344	wmic.exe
Token: SeRemoteShutdownPrivilege	3344	wmic.exe
Token: SeUndockPrivilege	3344	wmic.exe
Token: SeManageVolumePrivilege	3344	wmic.exe
Token: 33	3344	wmic.exe
Token: 34	3344	wmic.exe
Token: 35	3344	wmic.exe
Token: 36	3344	wmic.exe
Token: SeIncreaseQuotaPrivilege	3344	wmic.exe
Token: SeSecurityPrivilege	3344	wmic.exe
Token: SeTakeOwnershipPrivilege	3344	wmic.exe
Token: SeLoadDriverPrivilege	3344	wmic.exe
Token: SeSystemProfilePrivilege	3344	wmic.exe
Token: SeSystemtimePrivilege	3344	wmic.exe
Token: SeProfSingleProcessPrivilege	3344	wmic.exe
Token: SeIncBasePriorityPrivilege	3344	wmic.exe
Token: SeCreatePagefilePrivilege	3344	wmic.exe
Token: SeBackupPrivilege	3344	wmic.exe
Token: SeRestorePrivilege	3344	wmic.exe
Token: SeShutdownPrivilege	3344	wmic.exe
Token: SeDebugPrivilege	3344	wmic.exe
Token: SeSystemEnvironmentPrivilege	3344	wmic.exe
Token: SeRemoteShutdownPrivilege	3344	wmic.exe
Token: SeUndockPrivilege	3344	wmic.exe
Token: SeManageVolumePrivilege	3344	wmic.exe
Token: 33	3344	wmic.exe
Token: 34	3344	wmic.exe
Token: 35	3344	wmic.exe
Token: 36	3344	wmic.exe
Token: SeDebugPrivilege	2260	powershell.exe
Token: SeDebugPrivilege	4372	powershell.exe
Token: SeDebugPrivilege	4480	powershell.exe
Token: SeDebugPrivilege	1544	powershell.exe
Token: SeIncreaseQuotaPrivilege	3848	wmic.exe
Token: SeSecurityPrivilege	3848	wmic.exe
Token: SeTakeOwnershipPrivilege	3848	wmic.exe
Token: SeLoadDriverPrivilege	3848	wmic.exe
Token: SeSystemProfilePrivilege	3848	wmic.exe
Token: SeSystemtimePrivilege	3848	wmic.exe
Token: SeProfSingleProcessPrivilege	3848	wmic.exe
Token: SeIncBasePriorityPrivilege	3848	wmic.exe
Token: SeCreatePagefilePrivilege	3848	wmic.exe
Token: SeBackupPrivilege	3848	wmic.exe
Token: SeRestorePrivilege	3848	wmic.exe
Token: SeShutdownPrivilege	3848	wmic.exe
Token: SeDebugPrivilege	3848	wmic.exe
Token: SeSystemEnvironmentPrivilege	3848	wmic.exe
Token: SeRemoteShutdownPrivilege	3848	wmic.exe
Token: SeUndockPrivilege	3848	wmic.exe
Token: SeManageVolumePrivilege	3848	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2420 wrote to memory of 3344	2420	Umbral.exe	84
PID 2420 wrote to memory of 3344	2420	Umbral.exe	84
PID 2420 wrote to memory of 4068	2420	Umbral.exe	90
PID 2420 wrote to memory of 4068	2420	Umbral.exe	90
PID 2420 wrote to memory of 2260	2420	Umbral.exe	92
PID 2420 wrote to memory of 2260	2420	Umbral.exe	92
PID 2420 wrote to memory of 4372	2420	Umbral.exe	94
PID 2420 wrote to memory of 4372	2420	Umbral.exe	94
PID 2420 wrote to memory of 4480	2420	Umbral.exe	96
PID 2420 wrote to memory of 4480	2420	Umbral.exe	96
PID 2420 wrote to memory of 1544	2420	Umbral.exe	98
PID 2420 wrote to memory of 1544	2420	Umbral.exe	98
PID 2420 wrote to memory of 3848	2420	Umbral.exe	102
PID 2420 wrote to memory of 3848	2420	Umbral.exe	102
PID 2420 wrote to memory of 3504	2420	Umbral.exe	104
PID 2420 wrote to memory of 3504	2420	Umbral.exe	104
PID 2420 wrote to memory of 4896	2420	Umbral.exe	106
PID 2420 wrote to memory of 4896	2420	Umbral.exe	106
PID 2420 wrote to memory of 3280	2420	Umbral.exe	109
PID 2420 wrote to memory of 3280	2420	Umbral.exe	109
PID 2420 wrote to memory of 3228	2420	Umbral.exe	111
PID 2420 wrote to memory of 3228	2420	Umbral.exe	111
PID 2420 wrote to memory of 2144	2420	Umbral.exe	113
PID 2420 wrote to memory of 2144	2420	Umbral.exe	113
PID 2144 wrote to memory of 4532	2144	cmd.exe	115
PID 2144 wrote to memory of 4532	2144	cmd.exe	115

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4068	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:2420
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3344
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:4068
- 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:2260
- 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:4372
- 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:4480
- 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:1544
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3848
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:3504
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4896
- 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:3280
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:3228
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Umbral.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2144
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:4532

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

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

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
c65738617888921a153bd9b1ef516ee7

SHA1
5245e71ea3c181d76320c857b639272ac9e079b1

SHA256
4640ba4001fd16a593315299cbdd4988dc2c7075820687f1018aac40aca95c26

SHA512
2e2a0ebd93f9d8dd07a7599054bce232683e9add9a35e77b584618040bcfd84a42545352519ec4736cc379002210b6f3ed2d905591c6925c0981b0392b495bfa

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
32aba9fc1f9be72d6cec0c940a447e7d

SHA1
e7592845595240ce5b9fb7446ef662a07d776dbb

SHA256
9780e7a93d5d6ab92e2d0c24a613d978bdedd8acab2a7e7bd383121adefd4f9b

SHA512
a9c81be11554941af0b08129302bd77ba131e04e88b983c9203f9f7a26bfc1b102b75bc19a95ae68beb0da0dbcbbac681ad53b79f274af35af28dbb10dfa1a9b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_lbleh2cf.ogd.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2260-13-0x00007FF92DA00000-0x00007FF92E4C1000-memory.dmp

Filesize
10.8MB

Download
memory/2260-14-0x00007FF92DA00000-0x00007FF92E4C1000-memory.dmp

Filesize
10.8MB

Download
memory/2260-15-0x000001CE40EB0000-0x000001CE40ED2000-memory.dmp

Filesize
136KB

Download
memory/2260-18-0x00007FF92DA00000-0x00007FF92E4C1000-memory.dmp

Filesize
10.8MB

Download
memory/2260-3-0x00007FF92DA00000-0x00007FF92E4C1000-memory.dmp

Filesize
10.8MB

Download
memory/2420-34-0x0000022A6EC00000-0x0000022A6EC50000-memory.dmp

Filesize
320KB

Download
memory/2420-33-0x0000022A6EC80000-0x0000022A6ECF6000-memory.dmp

Filesize
472KB

Download
memory/2420-35-0x0000022A6E950000-0x0000022A6E96E000-memory.dmp

Filesize
120KB

Download
memory/2420-1-0x0000022A54500000-0x0000022A54540000-memory.dmp

Filesize
256KB

Download
memory/2420-0-0x00007FF92DA03000-0x00007FF92DA05000-memory.dmp

Filesize
8KB

Download
memory/2420-71-0x0000022A6E990000-0x0000022A6E99A000-memory.dmp

Filesize
40KB

Download
memory/2420-72-0x0000022A6EE00000-0x0000022A6EE12000-memory.dmp

Filesize
72KB

Download
memory/2420-2-0x00007FF92DA00000-0x00007FF92E4C1000-memory.dmp

Filesize
10.8MB

Download
memory/2420-90-0x00007FF92DA00000-0x00007FF92E4C1000-memory.dmp

Filesize
10.8MB

Download