umbral | 1d4614f2beab6bab69464e7cf41e34db255e42a9b8d754d598faa0b9ec4d7b99

Analysis

max time kernel
12s
max time network
14s
platform
windows10-2004_x64
resource
win10v2004-20240611-en
resource tags

arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
submitted
30-06-2024 07:30

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General

Target

Umbral.exe
Size

227KB
MD5

9373f372b640980c2c21635ea1d0e198
SHA1

4a839ba396c68479c9b78cbfd1ea9005c9c1840e
SHA256

1d4614f2beab6bab69464e7cf41e34db255e42a9b8d754d598faa0b9ec4d7b99
SHA512

9a6db6f4a87666e9789273027217d9656257917f530b36c60f9e026bbc9ef2229f66718b6365d0691ec254e153a537bfa1c577f7df4d588218b3c110ffbd46d8
SSDEEP

6144:+loZM+rIkd8g+EtXHkv/iD4SRLvW0b3c5NImHHm9cb8e1m6i:ooZtL+EP8SRLvW0b3c5NImHHmec

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/1368-0-0x000001F9222B0000-0x000001F9222F0000-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
4056	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
26	discord.com
27	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
4980	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
6116	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
1368	Umbral.exe
4056	powershell.exe
4056	powershell.exe
5000	powershell.exe
5000	powershell.exe
1780	powershell.exe
1780	powershell.exe
5672	powershell.exe
5672	powershell.exe
4372	powershell.exe
4372	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1368	Umbral.exe
Token: SeIncreaseQuotaPrivilege	3040	wmic.exe
Token: SeSecurityPrivilege	3040	wmic.exe
Token: SeTakeOwnershipPrivilege	3040	wmic.exe
Token: SeLoadDriverPrivilege	3040	wmic.exe
Token: SeSystemProfilePrivilege	3040	wmic.exe
Token: SeSystemtimePrivilege	3040	wmic.exe
Token: SeProfSingleProcessPrivilege	3040	wmic.exe
Token: SeIncBasePriorityPrivilege	3040	wmic.exe
Token: SeCreatePagefilePrivilege	3040	wmic.exe
Token: SeBackupPrivilege	3040	wmic.exe
Token: SeRestorePrivilege	3040	wmic.exe
Token: SeShutdownPrivilege	3040	wmic.exe
Token: SeDebugPrivilege	3040	wmic.exe
Token: SeSystemEnvironmentPrivilege	3040	wmic.exe
Token: SeRemoteShutdownPrivilege	3040	wmic.exe
Token: SeUndockPrivilege	3040	wmic.exe
Token: SeManageVolumePrivilege	3040	wmic.exe
Token: 33	3040	wmic.exe
Token: 34	3040	wmic.exe
Token: 35	3040	wmic.exe
Token: 36	3040	wmic.exe
Token: SeIncreaseQuotaPrivilege	3040	wmic.exe
Token: SeSecurityPrivilege	3040	wmic.exe
Token: SeTakeOwnershipPrivilege	3040	wmic.exe
Token: SeLoadDriverPrivilege	3040	wmic.exe
Token: SeSystemProfilePrivilege	3040	wmic.exe
Token: SeSystemtimePrivilege	3040	wmic.exe
Token: SeProfSingleProcessPrivilege	3040	wmic.exe
Token: SeIncBasePriorityPrivilege	3040	wmic.exe
Token: SeCreatePagefilePrivilege	3040	wmic.exe
Token: SeBackupPrivilege	3040	wmic.exe
Token: SeRestorePrivilege	3040	wmic.exe
Token: SeShutdownPrivilege	3040	wmic.exe
Token: SeDebugPrivilege	3040	wmic.exe
Token: SeSystemEnvironmentPrivilege	3040	wmic.exe
Token: SeRemoteShutdownPrivilege	3040	wmic.exe
Token: SeUndockPrivilege	3040	wmic.exe
Token: SeManageVolumePrivilege	3040	wmic.exe
Token: 33	3040	wmic.exe
Token: 34	3040	wmic.exe
Token: 35	3040	wmic.exe
Token: 36	3040	wmic.exe
Token: SeDebugPrivilege	4056	powershell.exe
Token: SeDebugPrivilege	5000	powershell.exe
Token: SeDebugPrivilege	1780	powershell.exe
Token: SeDebugPrivilege	5672	powershell.exe
Token: SeIncreaseQuotaPrivilege	1148	wmic.exe
Token: SeSecurityPrivilege	1148	wmic.exe
Token: SeTakeOwnershipPrivilege	1148	wmic.exe
Token: SeLoadDriverPrivilege	1148	wmic.exe
Token: SeSystemProfilePrivilege	1148	wmic.exe
Token: SeSystemtimePrivilege	1148	wmic.exe
Token: SeProfSingleProcessPrivilege	1148	wmic.exe
Token: SeIncBasePriorityPrivilege	1148	wmic.exe
Token: SeCreatePagefilePrivilege	1148	wmic.exe
Token: SeBackupPrivilege	1148	wmic.exe
Token: SeRestorePrivilege	1148	wmic.exe
Token: SeShutdownPrivilege	1148	wmic.exe
Token: SeDebugPrivilege	1148	wmic.exe
Token: SeSystemEnvironmentPrivilege	1148	wmic.exe
Token: SeRemoteShutdownPrivilege	1148	wmic.exe
Token: SeUndockPrivilege	1148	wmic.exe
Token: SeManageVolumePrivilege	1148	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1368 wrote to memory of 3040	1368	Umbral.exe	82
PID 1368 wrote to memory of 3040	1368	Umbral.exe	82
PID 1368 wrote to memory of 636	1368	Umbral.exe	87
PID 1368 wrote to memory of 636	1368	Umbral.exe	87
PID 1368 wrote to memory of 4056	1368	Umbral.exe	89
PID 1368 wrote to memory of 4056	1368	Umbral.exe	89
PID 1368 wrote to memory of 5000	1368	Umbral.exe	92
PID 1368 wrote to memory of 5000	1368	Umbral.exe	92
PID 1368 wrote to memory of 1780	1368	Umbral.exe	94
PID 1368 wrote to memory of 1780	1368	Umbral.exe	94
PID 1368 wrote to memory of 5672	1368	Umbral.exe	96
PID 1368 wrote to memory of 5672	1368	Umbral.exe	96
PID 1368 wrote to memory of 1148	1368	Umbral.exe	100
PID 1368 wrote to memory of 1148	1368	Umbral.exe	100
PID 1368 wrote to memory of 3236	1368	Umbral.exe	102
PID 1368 wrote to memory of 3236	1368	Umbral.exe	102
PID 1368 wrote to memory of 2296	1368	Umbral.exe	104
PID 1368 wrote to memory of 2296	1368	Umbral.exe	104
PID 1368 wrote to memory of 4372	1368	Umbral.exe	106
PID 1368 wrote to memory of 4372	1368	Umbral.exe	106
PID 1368 wrote to memory of 4980	1368	Umbral.exe	108
PID 1368 wrote to memory of 4980	1368	Umbral.exe	108
PID 1368 wrote to memory of 1372	1368	Umbral.exe	111
PID 1368 wrote to memory of 1372	1368	Umbral.exe	111
PID 1372 wrote to memory of 6116	1372	cmd.exe	113
PID 1372 wrote to memory of 6116	1372	cmd.exe	113

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
636	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:1368
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3040
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:636
- 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:4056
- 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:5000
- 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:1780
- 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:5672
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1148
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:3236
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2296
- 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:4372
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4980
- 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:1372
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:6116

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
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
88be3bc8a7f90e3953298c0fdbec4d72

SHA1
f4969784ad421cc80ef45608727aacd0f6bf2e4b

SHA256
533c8470b41084e40c5660569ebbdb7496520d449629a235e8053e84025f348a

SHA512
4fce64e2dacddbc03314048fef1ce356ee2647c14733da121c23c65507eeb8d721d6b690ad5463319b364dc4fa95904ad6ab096907f32918e3406ef438a6ef7c

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

Filesize
1KB

MD5
77fad1dec6867fb7dd395c25c46d8ae5

SHA1
abfecfd6c63bb35ec88d98ef210adefc139d793e

SHA256
02b0ab469998ac630b421de245ee243599422e7f2c2f9714085fc5b837891784

SHA512
ac8d9d660992d076e46ffdb7422d4916789a7ca2f5737c711449f518745dee197ed1c08e50f81f92cb7d2d1ea94fe024e77a8295e1be05c5a49a0fd7495776d3

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_uhm2hh0f.umb.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1368-34-0x000001F923F30000-0x000001F923F4E000-memory.dmp

Filesize
120KB

Download
memory/1368-32-0x000001F93CA10000-0x000001F93CA86000-memory.dmp

Filesize
472KB

Download
memory/1368-33-0x000001F93CA90000-0x000001F93CAE0000-memory.dmp

Filesize
320KB

Download
memory/1368-0-0x000001F9222B0000-0x000001F9222F0000-memory.dmp

Filesize
256KB

Download
memory/1368-2-0x00007FFE26050000-0x00007FFE26B11000-memory.dmp

Filesize
10.8MB

Download
memory/1368-71-0x000001F93C9A0000-0x000001F93C9AA000-memory.dmp

Filesize
40KB

Download
memory/1368-72-0x000001F93C9D0000-0x000001F93C9E2000-memory.dmp

Filesize
72KB

Download
memory/1368-1-0x00007FFE26053000-0x00007FFE26055000-memory.dmp

Filesize
8KB

Download
memory/1368-92-0x00007FFE26050000-0x00007FFE26B11000-memory.dmp

Filesize
10.8MB

Download
memory/4056-17-0x00007FFE26050000-0x00007FFE26B11000-memory.dmp

Filesize
10.8MB

Download
memory/4056-10-0x000002E268BD0000-0x000002E268BF2000-memory.dmp

Filesize
136KB

Download
memory/4056-4-0x00007FFE26050000-0x00007FFE26B11000-memory.dmp

Filesize
10.8MB

Download
memory/4056-3-0x00007FFE26050000-0x00007FFE26B11000-memory.dmp

Filesize
10.8MB

Download