umbral | 18b39864c478ca8d947a0b08e48965402477064b4c6975831f18b141d2a1d21f

Analysis

max time kernel
93s
max time network
97s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
29-05-2024 18:54

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General

Target

Umbral.exe
Size

227KB
MD5

352d7bc3f16944c271e510f0bfad2b71
SHA1

fb31618e42f6beecf323f045f8453e7ecb67f0ea
SHA256

18b39864c478ca8d947a0b08e48965402477064b4c6975831f18b141d2a1d21f
SHA512

c69b31c6d74dbd6342e857a2411c96af670022831ce48000385ec05a07f9465e24878eeefbdd6f26f7f9ef34a6b2e8501523151a38f63dc51294e7f280bdaf0f
SSDEEP

6144:+loZM+rIkd8g+EtXHkv/iD4nAaBJX8QfF+nJUg1vbb8e1mUMi:ooZtL+EP8nAaBJX8QfF+nJUg1XFF

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/2804-0-0x000002928F110000-0x000002928F150000-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
5088	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
23	discord.com
24	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
6	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4152	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
368	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
2804	Umbral.exe
5088	powershell.exe
5088	powershell.exe
3584	powershell.exe
3584	powershell.exe
3728	powershell.exe
3728	powershell.exe
3668	powershell.exe
3668	powershell.exe
3552	powershell.exe
3552	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2804	Umbral.exe
Token: SeIncreaseQuotaPrivilege	2600	wmic.exe
Token: SeSecurityPrivilege	2600	wmic.exe
Token: SeTakeOwnershipPrivilege	2600	wmic.exe
Token: SeLoadDriverPrivilege	2600	wmic.exe
Token: SeSystemProfilePrivilege	2600	wmic.exe
Token: SeSystemtimePrivilege	2600	wmic.exe
Token: SeProfSingleProcessPrivilege	2600	wmic.exe
Token: SeIncBasePriorityPrivilege	2600	wmic.exe
Token: SeCreatePagefilePrivilege	2600	wmic.exe
Token: SeBackupPrivilege	2600	wmic.exe
Token: SeRestorePrivilege	2600	wmic.exe
Token: SeShutdownPrivilege	2600	wmic.exe
Token: SeDebugPrivilege	2600	wmic.exe
Token: SeSystemEnvironmentPrivilege	2600	wmic.exe
Token: SeRemoteShutdownPrivilege	2600	wmic.exe
Token: SeUndockPrivilege	2600	wmic.exe
Token: SeManageVolumePrivilege	2600	wmic.exe
Token: 33	2600	wmic.exe
Token: 34	2600	wmic.exe
Token: 35	2600	wmic.exe
Token: 36	2600	wmic.exe
Token: SeIncreaseQuotaPrivilege	2600	wmic.exe
Token: SeSecurityPrivilege	2600	wmic.exe
Token: SeTakeOwnershipPrivilege	2600	wmic.exe
Token: SeLoadDriverPrivilege	2600	wmic.exe
Token: SeSystemProfilePrivilege	2600	wmic.exe
Token: SeSystemtimePrivilege	2600	wmic.exe
Token: SeProfSingleProcessPrivilege	2600	wmic.exe
Token: SeIncBasePriorityPrivilege	2600	wmic.exe
Token: SeCreatePagefilePrivilege	2600	wmic.exe
Token: SeBackupPrivilege	2600	wmic.exe
Token: SeRestorePrivilege	2600	wmic.exe
Token: SeShutdownPrivilege	2600	wmic.exe
Token: SeDebugPrivilege	2600	wmic.exe
Token: SeSystemEnvironmentPrivilege	2600	wmic.exe
Token: SeRemoteShutdownPrivilege	2600	wmic.exe
Token: SeUndockPrivilege	2600	wmic.exe
Token: SeManageVolumePrivilege	2600	wmic.exe
Token: 33	2600	wmic.exe
Token: 34	2600	wmic.exe
Token: 35	2600	wmic.exe
Token: 36	2600	wmic.exe
Token: SeDebugPrivilege	5088	powershell.exe
Token: SeDebugPrivilege	3584	powershell.exe
Token: SeDebugPrivilege	3728	powershell.exe
Token: SeDebugPrivilege	3668	powershell.exe
Token: SeIncreaseQuotaPrivilege	3700	wmic.exe
Token: SeSecurityPrivilege	3700	wmic.exe
Token: SeTakeOwnershipPrivilege	3700	wmic.exe
Token: SeLoadDriverPrivilege	3700	wmic.exe
Token: SeSystemProfilePrivilege	3700	wmic.exe
Token: SeSystemtimePrivilege	3700	wmic.exe
Token: SeProfSingleProcessPrivilege	3700	wmic.exe
Token: SeIncBasePriorityPrivilege	3700	wmic.exe
Token: SeCreatePagefilePrivilege	3700	wmic.exe
Token: SeBackupPrivilege	3700	wmic.exe
Token: SeRestorePrivilege	3700	wmic.exe
Token: SeShutdownPrivilege	3700	wmic.exe
Token: SeDebugPrivilege	3700	wmic.exe
Token: SeSystemEnvironmentPrivilege	3700	wmic.exe
Token: SeRemoteShutdownPrivilege	3700	wmic.exe
Token: SeUndockPrivilege	3700	wmic.exe
Token: SeManageVolumePrivilege	3700	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2804 wrote to memory of 2600	2804	Umbral.exe	84
PID 2804 wrote to memory of 2600	2804	Umbral.exe	84
PID 2804 wrote to memory of 4844	2804	Umbral.exe	88
PID 2804 wrote to memory of 4844	2804	Umbral.exe	88
PID 2804 wrote to memory of 5088	2804	Umbral.exe	90
PID 2804 wrote to memory of 5088	2804	Umbral.exe	90
PID 2804 wrote to memory of 3584	2804	Umbral.exe	92
PID 2804 wrote to memory of 3584	2804	Umbral.exe	92
PID 2804 wrote to memory of 3728	2804	Umbral.exe	94
PID 2804 wrote to memory of 3728	2804	Umbral.exe	94
PID 2804 wrote to memory of 3668	2804	Umbral.exe	96
PID 2804 wrote to memory of 3668	2804	Umbral.exe	96
PID 2804 wrote to memory of 3700	2804	Umbral.exe	98
PID 2804 wrote to memory of 3700	2804	Umbral.exe	98
PID 2804 wrote to memory of 2012	2804	Umbral.exe	100
PID 2804 wrote to memory of 2012	2804	Umbral.exe	100
PID 2804 wrote to memory of 3516	2804	Umbral.exe	102
PID 2804 wrote to memory of 3516	2804	Umbral.exe	102
PID 2804 wrote to memory of 3552	2804	Umbral.exe	104
PID 2804 wrote to memory of 3552	2804	Umbral.exe	104
PID 2804 wrote to memory of 4152	2804	Umbral.exe	106
PID 2804 wrote to memory of 4152	2804	Umbral.exe	106
PID 2804 wrote to memory of 3212	2804	Umbral.exe	111
PID 2804 wrote to memory of 3212	2804	Umbral.exe	111
PID 3212 wrote to memory of 368	3212	cmd.exe	113
PID 3212 wrote to memory of 368	3212	cmd.exe	113

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4844	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:2804
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2600
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:4844
- 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:5088
- 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:3584
- 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:3728
- 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:3668
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3700
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2012
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3516
- 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:3552
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4152
- 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:3212
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:368

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
966914e2e771de7a4a57a95b6ecfa8a9

SHA1
7a32282fd51dd032967ed4d9a40cc57e265aeff2

SHA256
98d3c70d7004fa807897317bd6cd3e977b9b6c72d4d2565aca0f9f8b1c315cba

SHA512
dc39c7124a9c7c8d4c7e8e16290c46360b8d9a8f4e43edaacbbeb09bdcf20159a53db54d2b322372001b6a3de52b2f88e9088b5fdbc7638816ae0d122bb015f5

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
bb059cd5ec81445db881376f4c2d7eeb

SHA1
d36313ed7b12132106252009b2658a1c70fb1e87

SHA256
987d374beac33bedb33df17b602f2fdf5cdf81fa14f11dbbe606506efb8a74ad

SHA512
ce6f532e13d8353b3ad64be2d55df9600bb700dd8a4e1f8f16b1d52c416f97c7a71927a2165d74771ce7bb81dcdc33a7cf39d7f6b4dee5b9b36af22668262409

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_y4e1fyu0.q1k.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2804-0-0x000002928F110000-0x000002928F150000-memory.dmp

Filesize
256KB

Download
memory/2804-2-0x00007FFE7BBA0000-0x00007FFE7C661000-memory.dmp

Filesize
10.8MB

Download
memory/2804-1-0x00007FFE7BBA3000-0x00007FFE7BBA5000-memory.dmp

Filesize
8KB

Download
memory/2804-31-0x00000292A9870000-0x00000292A98E6000-memory.dmp

Filesize
472KB

Download
memory/2804-32-0x00000292A9960000-0x00000292A99B0000-memory.dmp

Filesize
320KB

Download
memory/2804-33-0x00000292A98F0000-0x00000292A990E000-memory.dmp

Filesize
120KB

Download
memory/2804-69-0x00000292A97D0000-0x00000292A97DA000-memory.dmp

Filesize
40KB

Download
memory/2804-70-0x00000292A9810000-0x00000292A9822000-memory.dmp

Filesize
72KB

Download
memory/2804-88-0x00007FFE7BBA0000-0x00007FFE7C661000-memory.dmp

Filesize
10.8MB

Download
memory/5088-3-0x00007FFE7BBA0000-0x00007FFE7C661000-memory.dmp

Filesize
10.8MB

Download
memory/5088-16-0x00007FFE7BBA0000-0x00007FFE7C661000-memory.dmp

Filesize
10.8MB

Download
memory/5088-13-0x000001AFC2810000-0x000001AFC2832000-memory.dmp

Filesize
136KB

Download