umbral | 5c37ed0542974bf478e1e6ff614395e6110bfc4726494e72f76b62e014bda0ff

Analysis

max time kernel
98s
max time network
126s
platform
windows11-21h2_x64
resource
win11-20240802-en
resource tags

arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
submitted
23-08-2024 15:33

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General

Target

drivers.exe
Size

229KB
MD5

8275af467a6e5859869a13eabc03cc15
SHA1

e70d0630ff34f6a1c72ab4343dc01c6dd4c53bc1
SHA256

5c37ed0542974bf478e1e6ff614395e6110bfc4726494e72f76b62e014bda0ff
SHA512

87497047b564694a15193d6b5e7d13fbfbbeeec2f14993c09a79b52fa9781ede36136d1c688d264ccd2c45ea93d5f372c210ae54066de02e3abf7d15428d4e6a
SSDEEP

6144:lloZMLrIkd8g+EtXHkv/iD4yEay5nsAv4OXZkQlpAb8e1mGi:noZ0L+EP8yEay5nsAv4OXZkQlu4

Score

10^/10

umbral credential_access execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral3/memory/4092-1-0x0000013D5C170000-0x0000013D5C1B0000-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
1104	powershell.exe
2960	powershell.exe
2716	powershell.exe
4380	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	drivers.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
13	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
1	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1968	wmic.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
4092	drivers.exe
1104	powershell.exe
1104	powershell.exe
4380	powershell.exe
4380	powershell.exe
2960	powershell.exe
2960	powershell.exe
1524	powershell.exe
1524	powershell.exe
2716	powershell.exe
2716	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4092	drivers.exe
Token: SeIncreaseQuotaPrivilege	3496	wmic.exe
Token: SeSecurityPrivilege	3496	wmic.exe
Token: SeTakeOwnershipPrivilege	3496	wmic.exe
Token: SeLoadDriverPrivilege	3496	wmic.exe
Token: SeSystemProfilePrivilege	3496	wmic.exe
Token: SeSystemtimePrivilege	3496	wmic.exe
Token: SeProfSingleProcessPrivilege	3496	wmic.exe
Token: SeIncBasePriorityPrivilege	3496	wmic.exe
Token: SeCreatePagefilePrivilege	3496	wmic.exe
Token: SeBackupPrivilege	3496	wmic.exe
Token: SeRestorePrivilege	3496	wmic.exe
Token: SeShutdownPrivilege	3496	wmic.exe
Token: SeDebugPrivilege	3496	wmic.exe
Token: SeSystemEnvironmentPrivilege	3496	wmic.exe
Token: SeRemoteShutdownPrivilege	3496	wmic.exe
Token: SeUndockPrivilege	3496	wmic.exe
Token: SeManageVolumePrivilege	3496	wmic.exe
Token: 33	3496	wmic.exe
Token: 34	3496	wmic.exe
Token: 35	3496	wmic.exe
Token: 36	3496	wmic.exe
Token: SeIncreaseQuotaPrivilege	3496	wmic.exe
Token: SeSecurityPrivilege	3496	wmic.exe
Token: SeTakeOwnershipPrivilege	3496	wmic.exe
Token: SeLoadDriverPrivilege	3496	wmic.exe
Token: SeSystemProfilePrivilege	3496	wmic.exe
Token: SeSystemtimePrivilege	3496	wmic.exe
Token: SeProfSingleProcessPrivilege	3496	wmic.exe
Token: SeIncBasePriorityPrivilege	3496	wmic.exe
Token: SeCreatePagefilePrivilege	3496	wmic.exe
Token: SeBackupPrivilege	3496	wmic.exe
Token: SeRestorePrivilege	3496	wmic.exe
Token: SeShutdownPrivilege	3496	wmic.exe
Token: SeDebugPrivilege	3496	wmic.exe
Token: SeSystemEnvironmentPrivilege	3496	wmic.exe
Token: SeRemoteShutdownPrivilege	3496	wmic.exe
Token: SeUndockPrivilege	3496	wmic.exe
Token: SeManageVolumePrivilege	3496	wmic.exe
Token: 33	3496	wmic.exe
Token: 34	3496	wmic.exe
Token: 35	3496	wmic.exe
Token: 36	3496	wmic.exe
Token: SeDebugPrivilege	1104	powershell.exe
Token: SeDebugPrivilege	4380	powershell.exe
Token: SeDebugPrivilege	2960	powershell.exe
Token: SeDebugPrivilege	1524	powershell.exe
Token: SeIncreaseQuotaPrivilege	4836	wmic.exe
Token: SeSecurityPrivilege	4836	wmic.exe
Token: SeTakeOwnershipPrivilege	4836	wmic.exe
Token: SeLoadDriverPrivilege	4836	wmic.exe
Token: SeSystemProfilePrivilege	4836	wmic.exe
Token: SeSystemtimePrivilege	4836	wmic.exe
Token: SeProfSingleProcessPrivilege	4836	wmic.exe
Token: SeIncBasePriorityPrivilege	4836	wmic.exe
Token: SeCreatePagefilePrivilege	4836	wmic.exe
Token: SeBackupPrivilege	4836	wmic.exe
Token: SeRestorePrivilege	4836	wmic.exe
Token: SeShutdownPrivilege	4836	wmic.exe
Token: SeDebugPrivilege	4836	wmic.exe
Token: SeSystemEnvironmentPrivilege	4836	wmic.exe
Token: SeRemoteShutdownPrivilege	4836	wmic.exe
Token: SeUndockPrivilege	4836	wmic.exe
Token: SeManageVolumePrivilege	4836	wmic.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 4092 wrote to memory of 3496	4092	drivers.exe	82
PID 4092 wrote to memory of 3496	4092	drivers.exe	82
PID 4092 wrote to memory of 1104	4092	drivers.exe	85
PID 4092 wrote to memory of 1104	4092	drivers.exe	85
PID 4092 wrote to memory of 4380	4092	drivers.exe	87
PID 4092 wrote to memory of 4380	4092	drivers.exe	87
PID 4092 wrote to memory of 2960	4092	drivers.exe	89
PID 4092 wrote to memory of 2960	4092	drivers.exe	89
PID 4092 wrote to memory of 1524	4092	drivers.exe	91
PID 4092 wrote to memory of 1524	4092	drivers.exe	91
PID 4092 wrote to memory of 4836	4092	drivers.exe	93
PID 4092 wrote to memory of 4836	4092	drivers.exe	93
PID 4092 wrote to memory of 2688	4092	drivers.exe	95
PID 4092 wrote to memory of 2688	4092	drivers.exe	95
PID 4092 wrote to memory of 1752	4092	drivers.exe	97
PID 4092 wrote to memory of 1752	4092	drivers.exe	97
PID 4092 wrote to memory of 2716	4092	drivers.exe	99
PID 4092 wrote to memory of 2716	4092	drivers.exe	99
PID 4092 wrote to memory of 1968	4092	drivers.exe	101
PID 4092 wrote to memory of 1968	4092	drivers.exe	101

C:\Users\Admin\AppData\Local\Temp\drivers.exe
"C:\Users\Admin\AppData\Local\Temp\drivers.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4092
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3496
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\drivers.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1104
- 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:4380
- 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:2960
- 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:1524
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4836
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2688
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1752
- 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:2716
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1968

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
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

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

Filesize
944B

MD5
1a9fa92a4f2e2ec9e244d43a6a4f8fb9

SHA1
9910190edfaccece1dfcc1d92e357772f5dae8f7

SHA256
0ee052d5333fd5fd86bc84856fec98e045f077a7ac8051651bf7c521b9706888

SHA512
5d2361476fa22200e6f83883efe7dcb8c3fe7dae8d56e04e28a36e9ae1270c327b6aa161d92b239593da7661289d002c574446ecfd6bd19928209aae25e3ef64

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

Filesize
948B

MD5
6bddc96a32b9ed8fc70b141ccf4a39b2

SHA1
0f33c0699da40a5eadcec646791cf21cdb0dd7c6

SHA256
cb3853abe77eb0da8a1caccb49e97a573b6f35570722eb759116a645d724c132

SHA512
e41f1597b4129b759e4199db195df1c24e47cc47dc9850fab2d48e44bc3d37dc3658fbfbb62332a0b93c552587d7fab09de1634f605faa2209b8470c2a6eaca6

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

Filesize
1KB

MD5
f29ff8b1e0f396a194a6782749830b8e

SHA1
2f8999b0eb2a20e591cf9a638c9fa84ddf4a1f69

SHA256
5bfd4968395fefaac3941c08fa11e86dfde1072137d9290aee3888f2a5d92d3f

SHA512
0689d665f2a7c9007c5dc4c14a53d5566d315d05d476bee82d64d02d40e3ffddca2b36419c76a8f7b7979958a62a7a93c939d1ed72fa7a844841ed06741b9e19

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

Filesize
1KB

MD5
60a84ea8f3888e51bb0fe4856926a639

SHA1
43848b5a831f8fe7623694b36b17554b83770269

SHA256
5d219511d1091f4dc52ef6664815bcacf013c76b695bf2195aa439a6cc431504

SHA512
f6381deedc9612c96914173d948bd601192256c1b65a6b6be3c6664de84df64fb8740fa0205846e0380305bf5442e52991d134ff94b8edc899775befcc4a86ba

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3qfoplye.3u0.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1104-6-0x00007FF80B1C0000-0x00007FF80BC82000-memory.dmp

Filesize
10.8MB

Download
memory/1104-3-0x00007FF80B1C0000-0x00007FF80BC82000-memory.dmp

Filesize
10.8MB

Download
memory/1104-17-0x00000251D4BF0000-0x00000251D4D3F000-memory.dmp

Filesize
1.3MB

Download
memory/1104-18-0x00007FF80B1C0000-0x00007FF80BC82000-memory.dmp

Filesize
10.8MB

Download
memory/1104-5-0x00000251D4A00000-0x00000251D4A22000-memory.dmp

Filesize
136KB

Download
memory/1104-4-0x00007FF80B1C0000-0x00007FF80BC82000-memory.dmp

Filesize
10.8MB

Download
memory/1524-69-0x00000219FC410000-0x00000219FC55F000-memory.dmp

Filesize
1.3MB

Download
memory/2716-85-0x000002711F4B0000-0x000002711F5FF000-memory.dmp

Filesize
1.3MB

Download
memory/2960-58-0x000001937D1A0000-0x000001937D2EF000-memory.dmp

Filesize
1.3MB

Download
memory/4092-1-0x0000013D5C170000-0x0000013D5C1B0000-memory.dmp

Filesize
256KB

Download
memory/4092-35-0x0000013D5DF80000-0x0000013D5DF9E000-memory.dmp

Filesize
120KB

Download
memory/4092-34-0x0000013D76A70000-0x0000013D76AC0000-memory.dmp

Filesize
320KB

Download
memory/4092-2-0x00007FF80B1C0000-0x00007FF80BC82000-memory.dmp

Filesize
10.8MB

Download
memory/4092-33-0x0000013D769F0000-0x0000013D76A66000-memory.dmp

Filesize
472KB

Download
memory/4092-71-0x0000013D5DFC0000-0x0000013D5DFCA000-memory.dmp

Filesize
40KB

Download
memory/4092-72-0x0000013D76810000-0x0000013D76822000-memory.dmp

Filesize
72KB

Download
memory/4092-0-0x00007FF80B1C3000-0x00007FF80B1C5000-memory.dmp

Filesize
8KB

Download
memory/4092-87-0x00007FF80B1C3000-0x00007FF80B1C5000-memory.dmp

Filesize
8KB

Download
memory/4092-88-0x00007FF80B1C0000-0x00007FF80BC82000-memory.dmp

Filesize
10.8MB

Download
memory/4092-92-0x00007FF80B1C0000-0x00007FF80BC82000-memory.dmp

Filesize
10.8MB

Download
memory/4380-30-0x000002499BB20000-0x000002499BC6F000-memory.dmp

Filesize
1.3MB

Download