umbral | bb6f9600b07d01beeab0a868840ceea944a90d87fb5016ba71794ef68d0a19d6

Analysis

max time kernel
144s
max time network
133s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
09-08-2024 19:30

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General

Target

bb6f9600b07d01beeab0a868840ceea944a90d87fb5016ba71794ef68d0a19d6.exe
Size

229KB
MD5

67735e43b595bc948f427fbc1d4d9400
SHA1

df92217c3101826bf0ae4c8ba53e40026e64dcc3
SHA256

bb6f9600b07d01beeab0a868840ceea944a90d87fb5016ba71794ef68d0a19d6
SHA512

492b3d5372137ca3c3ad287fb84ab40ac6609eff5cf329a039f29b25c39d8c348bf547f01d6e90616e9c11593bf8f294cc73858917ca0ef2a7d03c91d6b89d14
SSDEEP

6144:lloZMLrIkd8g+EtXHkv/iD4vc/yrRiK13wBzOurcVfb8e1mki:noZ0L+EP8vc/yrRiK13wBzOurCG

Score

10^/10

umbral credential_access execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/1376-1-0x0000017A82190000-0x0000017A821D0000-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
4376	powershell.exe
3484	powershell.exe
3624	powershell.exe
692	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	bb6f9600b07d01beeab0a868840ceea944a90d87fb5016ba71794ef68d0a19d6.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
30	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
5	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4160	wmic.exe

Suspicious behavior: EnumeratesProcesses 16 IoCs

pid	Process
1376	bb6f9600b07d01beeab0a868840ceea944a90d87fb5016ba71794ef68d0a19d6.exe
4376	powershell.exe
4376	powershell.exe
4376	powershell.exe
3484	powershell.exe
3484	powershell.exe
3484	powershell.exe
3624	powershell.exe
3624	powershell.exe
3624	powershell.exe
4428	powershell.exe
4428	powershell.exe
4428	powershell.exe
692	powershell.exe
692	powershell.exe
692	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1376	bb6f9600b07d01beeab0a868840ceea944a90d87fb5016ba71794ef68d0a19d6.exe
Token: SeIncreaseQuotaPrivilege	1848	wmic.exe
Token: SeSecurityPrivilege	1848	wmic.exe
Token: SeTakeOwnershipPrivilege	1848	wmic.exe
Token: SeLoadDriverPrivilege	1848	wmic.exe
Token: SeSystemProfilePrivilege	1848	wmic.exe
Token: SeSystemtimePrivilege	1848	wmic.exe
Token: SeProfSingleProcessPrivilege	1848	wmic.exe
Token: SeIncBasePriorityPrivilege	1848	wmic.exe
Token: SeCreatePagefilePrivilege	1848	wmic.exe
Token: SeBackupPrivilege	1848	wmic.exe
Token: SeRestorePrivilege	1848	wmic.exe
Token: SeShutdownPrivilege	1848	wmic.exe
Token: SeDebugPrivilege	1848	wmic.exe
Token: SeSystemEnvironmentPrivilege	1848	wmic.exe
Token: SeRemoteShutdownPrivilege	1848	wmic.exe
Token: SeUndockPrivilege	1848	wmic.exe
Token: SeManageVolumePrivilege	1848	wmic.exe
Token: 33	1848	wmic.exe
Token: 34	1848	wmic.exe
Token: 35	1848	wmic.exe
Token: 36	1848	wmic.exe
Token: SeIncreaseQuotaPrivilege	1848	wmic.exe
Token: SeSecurityPrivilege	1848	wmic.exe
Token: SeTakeOwnershipPrivilege	1848	wmic.exe
Token: SeLoadDriverPrivilege	1848	wmic.exe
Token: SeSystemProfilePrivilege	1848	wmic.exe
Token: SeSystemtimePrivilege	1848	wmic.exe
Token: SeProfSingleProcessPrivilege	1848	wmic.exe
Token: SeIncBasePriorityPrivilege	1848	wmic.exe
Token: SeCreatePagefilePrivilege	1848	wmic.exe
Token: SeBackupPrivilege	1848	wmic.exe
Token: SeRestorePrivilege	1848	wmic.exe
Token: SeShutdownPrivilege	1848	wmic.exe
Token: SeDebugPrivilege	1848	wmic.exe
Token: SeSystemEnvironmentPrivilege	1848	wmic.exe
Token: SeRemoteShutdownPrivilege	1848	wmic.exe
Token: SeUndockPrivilege	1848	wmic.exe
Token: SeManageVolumePrivilege	1848	wmic.exe
Token: 33	1848	wmic.exe
Token: 34	1848	wmic.exe
Token: 35	1848	wmic.exe
Token: 36	1848	wmic.exe
Token: SeDebugPrivilege	4376	powershell.exe
Token: SeDebugPrivilege	3484	powershell.exe
Token: SeDebugPrivilege	3624	powershell.exe
Token: SeDebugPrivilege	4428	powershell.exe
Token: SeIncreaseQuotaPrivilege	2020	wmic.exe
Token: SeSecurityPrivilege	2020	wmic.exe
Token: SeTakeOwnershipPrivilege	2020	wmic.exe
Token: SeLoadDriverPrivilege	2020	wmic.exe
Token: SeSystemProfilePrivilege	2020	wmic.exe
Token: SeSystemtimePrivilege	2020	wmic.exe
Token: SeProfSingleProcessPrivilege	2020	wmic.exe
Token: SeIncBasePriorityPrivilege	2020	wmic.exe
Token: SeCreatePagefilePrivilege	2020	wmic.exe
Token: SeBackupPrivilege	2020	wmic.exe
Token: SeRestorePrivilege	2020	wmic.exe
Token: SeShutdownPrivilege	2020	wmic.exe
Token: SeDebugPrivilege	2020	wmic.exe
Token: SeSystemEnvironmentPrivilege	2020	wmic.exe
Token: SeRemoteShutdownPrivilege	2020	wmic.exe
Token: SeUndockPrivilege	2020	wmic.exe
Token: SeManageVolumePrivilege	2020	wmic.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 1376 wrote to memory of 1848	1376	bb6f9600b07d01beeab0a868840ceea944a90d87fb5016ba71794ef68d0a19d6.exe	92
PID 1376 wrote to memory of 1848	1376	bb6f9600b07d01beeab0a868840ceea944a90d87fb5016ba71794ef68d0a19d6.exe	92
PID 1376 wrote to memory of 4376	1376	bb6f9600b07d01beeab0a868840ceea944a90d87fb5016ba71794ef68d0a19d6.exe	97
PID 1376 wrote to memory of 4376	1376	bb6f9600b07d01beeab0a868840ceea944a90d87fb5016ba71794ef68d0a19d6.exe	97
PID 1376 wrote to memory of 3484	1376	bb6f9600b07d01beeab0a868840ceea944a90d87fb5016ba71794ef68d0a19d6.exe	99
PID 1376 wrote to memory of 3484	1376	bb6f9600b07d01beeab0a868840ceea944a90d87fb5016ba71794ef68d0a19d6.exe	99
PID 1376 wrote to memory of 3624	1376	bb6f9600b07d01beeab0a868840ceea944a90d87fb5016ba71794ef68d0a19d6.exe	101
PID 1376 wrote to memory of 3624	1376	bb6f9600b07d01beeab0a868840ceea944a90d87fb5016ba71794ef68d0a19d6.exe	101
PID 1376 wrote to memory of 4428	1376	bb6f9600b07d01beeab0a868840ceea944a90d87fb5016ba71794ef68d0a19d6.exe	103
PID 1376 wrote to memory of 4428	1376	bb6f9600b07d01beeab0a868840ceea944a90d87fb5016ba71794ef68d0a19d6.exe	103
PID 1376 wrote to memory of 2020	1376	bb6f9600b07d01beeab0a868840ceea944a90d87fb5016ba71794ef68d0a19d6.exe	105
PID 1376 wrote to memory of 2020	1376	bb6f9600b07d01beeab0a868840ceea944a90d87fb5016ba71794ef68d0a19d6.exe	105
PID 1376 wrote to memory of 2436	1376	bb6f9600b07d01beeab0a868840ceea944a90d87fb5016ba71794ef68d0a19d6.exe	107
PID 1376 wrote to memory of 2436	1376	bb6f9600b07d01beeab0a868840ceea944a90d87fb5016ba71794ef68d0a19d6.exe	107
PID 1376 wrote to memory of 3712	1376	bb6f9600b07d01beeab0a868840ceea944a90d87fb5016ba71794ef68d0a19d6.exe	111
PID 1376 wrote to memory of 3712	1376	bb6f9600b07d01beeab0a868840ceea944a90d87fb5016ba71794ef68d0a19d6.exe	111
PID 1376 wrote to memory of 692	1376	bb6f9600b07d01beeab0a868840ceea944a90d87fb5016ba71794ef68d0a19d6.exe	113
PID 1376 wrote to memory of 692	1376	bb6f9600b07d01beeab0a868840ceea944a90d87fb5016ba71794ef68d0a19d6.exe	113
PID 1376 wrote to memory of 4160	1376	bb6f9600b07d01beeab0a868840ceea944a90d87fb5016ba71794ef68d0a19d6.exe	115
PID 1376 wrote to memory of 4160	1376	bb6f9600b07d01beeab0a868840ceea944a90d87fb5016ba71794ef68d0a19d6.exe	115

C:\Users\Admin\AppData\Local\Temp\bb6f9600b07d01beeab0a868840ceea944a90d87fb5016ba71794ef68d0a19d6.exe
"C:\Users\Admin\AppData\Local\Temp\bb6f9600b07d01beeab0a868840ceea944a90d87fb5016ba71794ef68d0a19d6.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1376
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1848
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\bb6f9600b07d01beeab0a868840ceea944a90d87fb5016ba71794ef68d0a19d6.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4376
- 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:3484
- 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:3624
- 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:4428
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2020
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2436
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3712
- 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:692
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4160

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=1436,i,3210801877307184477,8078594481454001567,262144 --variations-seed-version --mojo-platform-channel-handle=4384 /prefetch:8
1⤵
PID:1552

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

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

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
2979eabc783eaca50de7be23dd4eafcf

SHA1
d709ce5f3a06b7958a67e20870bfd95b83cad2ea

SHA256
006cca90e78fbb571532a83082ac6712721a34ea4b21f490058ffb3f521f4903

SHA512
92bc433990572d9427d0c93eef9bd1cc23fa00ed60dd0c9c983d87d3421e02ce3f156c6f88fe916ef6782dbf185cbce083bc0094f8c527f302be6a37d1c53aba

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
548dd08570d121a65e82abb7171cae1c

SHA1
1a1b5084b3a78f3acd0d811cc79dbcac121217ab

SHA256
cdf17b8532ebcebac3cfe23954a30aa32edd268d040da79c82687e4ccb044adc

SHA512
37b98b09178b51eec9599af90d027d2f1028202efc1633047e16e41f1a95610984af5620baac07db085ccfcb96942aafffad17aa1f44f63233e83869dc9f697b

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

Filesize
1KB

MD5
ac057a92f4b62d8880169af0693ef5b2

SHA1
66e7c7834c5dae5cec863ccd69403150d05841f4

SHA256
7cef55990e8e6cfe07e1965b303e79ac562cdc128ab82edf480d9873f72bb3ed

SHA512
d525f47da9e61fc87e55aca6b34e776be3ed081b719bbbb5256705a6afe5fdd4c16d5ee595af13994e2718f789f5fd32830331347d97b029c031c9dfe30c7f49

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_so4mzmmd.brl.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1376-68-0x0000017A9C880000-0x0000017A9C88A000-memory.dmp

Filesize
40KB

Download
memory/1376-35-0x0000017A9C850000-0x0000017A9C86E000-memory.dmp

Filesize
120KB

Download
memory/1376-87-0x00007FFDE97A0000-0x00007FFDEA261000-memory.dmp

Filesize
10.8MB

Download
memory/1376-69-0x0000017A9C990000-0x0000017A9C9A2000-memory.dmp

Filesize
72KB

Download
memory/1376-2-0x00007FFDE97A0000-0x00007FFDEA261000-memory.dmp

Filesize
10.8MB

Download
memory/1376-33-0x0000017A9C8C0000-0x0000017A9C936000-memory.dmp

Filesize
472KB

Download
memory/1376-34-0x0000017A9C940000-0x0000017A9C990000-memory.dmp

Filesize
320KB

Download
memory/1376-1-0x0000017A82190000-0x0000017A821D0000-memory.dmp

Filesize
256KB

Download
memory/1376-0-0x00007FFDE97A3000-0x00007FFDE97A5000-memory.dmp

Filesize
8KB

Download
memory/4376-6-0x00007FFDE97A0000-0x00007FFDEA261000-memory.dmp

Filesize
10.8MB

Download
memory/4376-4-0x00007FFDE97A0000-0x00007FFDEA261000-memory.dmp

Filesize
10.8MB

Download
memory/4376-3-0x00007FFDE97A0000-0x00007FFDEA261000-memory.dmp

Filesize
10.8MB

Download
memory/4376-5-0x0000029E63610000-0x0000029E63632000-memory.dmp

Filesize
136KB

Download
memory/4376-18-0x00007FFDE97A0000-0x00007FFDEA261000-memory.dmp

Filesize
10.8MB

Download