umbral | 7bc2687b0deb06309fb8b9faf78081f88cd6ee35a05b7a8ea5cfbc3594e7ea7c

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
19/05/2024, 14:33

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General

Target

Umbral1.exe
Size

227KB
MD5

4ca902918277ffd054ecac215e6b99bf
SHA1

d5d14bcd985e9780289d97478291e4c011417acc
SHA256

7bc2687b0deb06309fb8b9faf78081f88cd6ee35a05b7a8ea5cfbc3594e7ea7c
SHA512

90e316478a2e2db35a3c2528b4c4c7d366daef43b11de969fff824750238b5dc706fdad63335635bd590327db3c8683163a2c77345bafd26a6cb2cc0a58ebcd7
SSDEEP

6144:eloZM+rIkd8g+EtXHkv/iD41ckD2U7X85toGnnGdXb8e1mZi:IoZtL+EP81ckD2U7X85toGnnGpr

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2196-1-0x0000000000D50000-0x0000000000D90000-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
2296	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	Umbral1.exe

Deletes itself 1 IoCs

pid	Process
1248	cmd.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
7	discord.com
8	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
668	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2284	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2196	Umbral1.exe
2296	powershell.exe
2624	powershell.exe
2680	powershell.exe
3028	powershell.exe
532	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2196	Umbral1.exe
Token: SeIncreaseQuotaPrivilege	2080	wmic.exe
Token: SeSecurityPrivilege	2080	wmic.exe
Token: SeTakeOwnershipPrivilege	2080	wmic.exe
Token: SeLoadDriverPrivilege	2080	wmic.exe
Token: SeSystemProfilePrivilege	2080	wmic.exe
Token: SeSystemtimePrivilege	2080	wmic.exe
Token: SeProfSingleProcessPrivilege	2080	wmic.exe
Token: SeIncBasePriorityPrivilege	2080	wmic.exe
Token: SeCreatePagefilePrivilege	2080	wmic.exe
Token: SeBackupPrivilege	2080	wmic.exe
Token: SeRestorePrivilege	2080	wmic.exe
Token: SeShutdownPrivilege	2080	wmic.exe
Token: SeDebugPrivilege	2080	wmic.exe
Token: SeSystemEnvironmentPrivilege	2080	wmic.exe
Token: SeRemoteShutdownPrivilege	2080	wmic.exe
Token: SeUndockPrivilege	2080	wmic.exe
Token: SeManageVolumePrivilege	2080	wmic.exe
Token: 33	2080	wmic.exe
Token: 34	2080	wmic.exe
Token: 35	2080	wmic.exe
Token: SeIncreaseQuotaPrivilege	2080	wmic.exe
Token: SeSecurityPrivilege	2080	wmic.exe
Token: SeTakeOwnershipPrivilege	2080	wmic.exe
Token: SeLoadDriverPrivilege	2080	wmic.exe
Token: SeSystemProfilePrivilege	2080	wmic.exe
Token: SeSystemtimePrivilege	2080	wmic.exe
Token: SeProfSingleProcessPrivilege	2080	wmic.exe
Token: SeIncBasePriorityPrivilege	2080	wmic.exe
Token: SeCreatePagefilePrivilege	2080	wmic.exe
Token: SeBackupPrivilege	2080	wmic.exe
Token: SeRestorePrivilege	2080	wmic.exe
Token: SeShutdownPrivilege	2080	wmic.exe
Token: SeDebugPrivilege	2080	wmic.exe
Token: SeSystemEnvironmentPrivilege	2080	wmic.exe
Token: SeRemoteShutdownPrivilege	2080	wmic.exe
Token: SeUndockPrivilege	2080	wmic.exe
Token: SeManageVolumePrivilege	2080	wmic.exe
Token: 33	2080	wmic.exe
Token: 34	2080	wmic.exe
Token: 35	2080	wmic.exe
Token: SeDebugPrivilege	2296	powershell.exe
Token: SeDebugPrivilege	2624	powershell.exe
Token: SeDebugPrivilege	2680	powershell.exe
Token: SeDebugPrivilege	3028	powershell.exe
Token: SeIncreaseQuotaPrivilege	1944	wmic.exe
Token: SeSecurityPrivilege	1944	wmic.exe
Token: SeTakeOwnershipPrivilege	1944	wmic.exe
Token: SeLoadDriverPrivilege	1944	wmic.exe
Token: SeSystemProfilePrivilege	1944	wmic.exe
Token: SeSystemtimePrivilege	1944	wmic.exe
Token: SeProfSingleProcessPrivilege	1944	wmic.exe
Token: SeIncBasePriorityPrivilege	1944	wmic.exe
Token: SeCreatePagefilePrivilege	1944	wmic.exe
Token: SeBackupPrivilege	1944	wmic.exe
Token: SeRestorePrivilege	1944	wmic.exe
Token: SeShutdownPrivilege	1944	wmic.exe
Token: SeDebugPrivilege	1944	wmic.exe
Token: SeSystemEnvironmentPrivilege	1944	wmic.exe
Token: SeRemoteShutdownPrivilege	1944	wmic.exe
Token: SeUndockPrivilege	1944	wmic.exe
Token: SeManageVolumePrivilege	1944	wmic.exe
Token: 33	1944	wmic.exe
Token: 34	1944	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2196 wrote to memory of 2080	2196	Umbral1.exe	28
PID 2196 wrote to memory of 2080	2196	Umbral1.exe	28
PID 2196 wrote to memory of 2080	2196	Umbral1.exe	28
PID 2196 wrote to memory of 2636	2196	Umbral1.exe	31
PID 2196 wrote to memory of 2636	2196	Umbral1.exe	31
PID 2196 wrote to memory of 2636	2196	Umbral1.exe	31
PID 2196 wrote to memory of 2296	2196	Umbral1.exe	33
PID 2196 wrote to memory of 2296	2196	Umbral1.exe	33
PID 2196 wrote to memory of 2296	2196	Umbral1.exe	33
PID 2196 wrote to memory of 2624	2196	Umbral1.exe	35
PID 2196 wrote to memory of 2624	2196	Umbral1.exe	35
PID 2196 wrote to memory of 2624	2196	Umbral1.exe	35
PID 2196 wrote to memory of 2680	2196	Umbral1.exe	37
PID 2196 wrote to memory of 2680	2196	Umbral1.exe	37
PID 2196 wrote to memory of 2680	2196	Umbral1.exe	37
PID 2196 wrote to memory of 3028	2196	Umbral1.exe	39
PID 2196 wrote to memory of 3028	2196	Umbral1.exe	39
PID 2196 wrote to memory of 3028	2196	Umbral1.exe	39
PID 2196 wrote to memory of 1944	2196	Umbral1.exe	41
PID 2196 wrote to memory of 1944	2196	Umbral1.exe	41
PID 2196 wrote to memory of 1944	2196	Umbral1.exe	41
PID 2196 wrote to memory of 1800	2196	Umbral1.exe	43
PID 2196 wrote to memory of 1800	2196	Umbral1.exe	43
PID 2196 wrote to memory of 1800	2196	Umbral1.exe	43
PID 2196 wrote to memory of 372	2196	Umbral1.exe	45
PID 2196 wrote to memory of 372	2196	Umbral1.exe	45
PID 2196 wrote to memory of 372	2196	Umbral1.exe	45
PID 2196 wrote to memory of 532	2196	Umbral1.exe	47
PID 2196 wrote to memory of 532	2196	Umbral1.exe	47
PID 2196 wrote to memory of 532	2196	Umbral1.exe	47
PID 2196 wrote to memory of 668	2196	Umbral1.exe	49
PID 2196 wrote to memory of 668	2196	Umbral1.exe	49
PID 2196 wrote to memory of 668	2196	Umbral1.exe	49
PID 2196 wrote to memory of 1248	2196	Umbral1.exe	51
PID 2196 wrote to memory of 1248	2196	Umbral1.exe	51
PID 2196 wrote to memory of 1248	2196	Umbral1.exe	51
PID 1248 wrote to memory of 2284	1248	cmd.exe	53
PID 1248 wrote to memory of 2284	1248	cmd.exe	53
PID 1248 wrote to memory of 2284	1248	cmd.exe	53

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2636	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Umbral1.exe
"C:\Users\Admin\AppData\Local\Temp\Umbral1.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2196
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2080
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral1.exe"
  2⤵
  - Views/modifies file attributes
  PID:2636
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Umbral1.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2296
- 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:2624
- 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:2680
- 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:3028
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1944
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1800
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:372
- 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:532
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:668
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Umbral1.exe" && pause
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1248
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:2284

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\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
3a4a3db0571ec8e84338066578dcee4a

SHA1
169729c59e12dd2ab1c8e12505622fe995b82fc0

SHA256
87e470ae0803f93d1d5513006dc014c12ea897bb79006475ba63be583c883ada

SHA512
ef2e24bf352103478d6d00a007edaa602a3831733b943f8d843518ab39cbfe18dfb18ca5b287d9ed2dd2f39dcc1d840cabe1f9d40005719107797de2b3584e30

Download Submit
memory/532-43-0x00000000026E0000-0x00000000026E8000-memory.dmp

Filesize
32KB

Download
memory/2196-0-0x000007FEF56A3000-0x000007FEF56A4000-memory.dmp

Filesize
4KB

Download
memory/2196-1-0x0000000000D50000-0x0000000000D90000-memory.dmp

Filesize
256KB

Download
memory/2196-2-0x000007FEF56A0000-0x000007FEF608C000-memory.dmp

Filesize
9.9MB

Download
memory/2196-47-0x000007FEF56A0000-0x000007FEF608C000-memory.dmp

Filesize
9.9MB

Download
memory/2296-7-0x000000001B630000-0x000000001B912000-memory.dmp

Filesize
2.9MB

Download
memory/2296-8-0x0000000001EC0000-0x0000000001EC8000-memory.dmp

Filesize
32KB

Download
memory/2624-14-0x000000001B610000-0x000000001B8F2000-memory.dmp

Filesize
2.9MB

Download
memory/2624-15-0x0000000002870000-0x0000000002878000-memory.dmp

Filesize
32KB

Download