umbral | 5c37ed0542974bf478e1e6ff614395e6110bfc4726494e72f76b62e014bda0ff

Analysis

max time kernel
139s
max time network
145s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-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
behavioral1/memory/4524-1-0x0000026E63780000-0x0000026E637C0000-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
3192	powershell.exe
3100	powershell.exe
1692	powershell.exe
2828	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
29	discord.com
30	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
9	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
456	wmic.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
4524	drivers.exe
3192	powershell.exe
3192	powershell.exe
3100	powershell.exe
3100	powershell.exe
1692	powershell.exe
1692	powershell.exe
2140	powershell.exe
2140	powershell.exe
2828	powershell.exe
2828	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4524	drivers.exe
Token: SeIncreaseQuotaPrivilege	3972	wmic.exe
Token: SeSecurityPrivilege	3972	wmic.exe
Token: SeTakeOwnershipPrivilege	3972	wmic.exe
Token: SeLoadDriverPrivilege	3972	wmic.exe
Token: SeSystemProfilePrivilege	3972	wmic.exe
Token: SeSystemtimePrivilege	3972	wmic.exe
Token: SeProfSingleProcessPrivilege	3972	wmic.exe
Token: SeIncBasePriorityPrivilege	3972	wmic.exe
Token: SeCreatePagefilePrivilege	3972	wmic.exe
Token: SeBackupPrivilege	3972	wmic.exe
Token: SeRestorePrivilege	3972	wmic.exe
Token: SeShutdownPrivilege	3972	wmic.exe
Token: SeDebugPrivilege	3972	wmic.exe
Token: SeSystemEnvironmentPrivilege	3972	wmic.exe
Token: SeRemoteShutdownPrivilege	3972	wmic.exe
Token: SeUndockPrivilege	3972	wmic.exe
Token: SeManageVolumePrivilege	3972	wmic.exe
Token: 33	3972	wmic.exe
Token: 34	3972	wmic.exe
Token: 35	3972	wmic.exe
Token: 36	3972	wmic.exe
Token: SeIncreaseQuotaPrivilege	3972	wmic.exe
Token: SeSecurityPrivilege	3972	wmic.exe
Token: SeTakeOwnershipPrivilege	3972	wmic.exe
Token: SeLoadDriverPrivilege	3972	wmic.exe
Token: SeSystemProfilePrivilege	3972	wmic.exe
Token: SeSystemtimePrivilege	3972	wmic.exe
Token: SeProfSingleProcessPrivilege	3972	wmic.exe
Token: SeIncBasePriorityPrivilege	3972	wmic.exe
Token: SeCreatePagefilePrivilege	3972	wmic.exe
Token: SeBackupPrivilege	3972	wmic.exe
Token: SeRestorePrivilege	3972	wmic.exe
Token: SeShutdownPrivilege	3972	wmic.exe
Token: SeDebugPrivilege	3972	wmic.exe
Token: SeSystemEnvironmentPrivilege	3972	wmic.exe
Token: SeRemoteShutdownPrivilege	3972	wmic.exe
Token: SeUndockPrivilege	3972	wmic.exe
Token: SeManageVolumePrivilege	3972	wmic.exe
Token: 33	3972	wmic.exe
Token: 34	3972	wmic.exe
Token: 35	3972	wmic.exe
Token: 36	3972	wmic.exe
Token: SeDebugPrivilege	3192	powershell.exe
Token: SeDebugPrivilege	3100	powershell.exe
Token: SeDebugPrivilege	1692	powershell.exe
Token: SeDebugPrivilege	2140	powershell.exe
Token: SeIncreaseQuotaPrivilege	2484	wmic.exe
Token: SeSecurityPrivilege	2484	wmic.exe
Token: SeTakeOwnershipPrivilege	2484	wmic.exe
Token: SeLoadDriverPrivilege	2484	wmic.exe
Token: SeSystemProfilePrivilege	2484	wmic.exe
Token: SeSystemtimePrivilege	2484	wmic.exe
Token: SeProfSingleProcessPrivilege	2484	wmic.exe
Token: SeIncBasePriorityPrivilege	2484	wmic.exe
Token: SeCreatePagefilePrivilege	2484	wmic.exe
Token: SeBackupPrivilege	2484	wmic.exe
Token: SeRestorePrivilege	2484	wmic.exe
Token: SeShutdownPrivilege	2484	wmic.exe
Token: SeDebugPrivilege	2484	wmic.exe
Token: SeSystemEnvironmentPrivilege	2484	wmic.exe
Token: SeRemoteShutdownPrivilege	2484	wmic.exe
Token: SeUndockPrivilege	2484	wmic.exe
Token: SeManageVolumePrivilege	2484	wmic.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 4524 wrote to memory of 3972	4524	drivers.exe	84
PID 4524 wrote to memory of 3972	4524	drivers.exe	84
PID 4524 wrote to memory of 3192	4524	drivers.exe	89
PID 4524 wrote to memory of 3192	4524	drivers.exe	89
PID 4524 wrote to memory of 3100	4524	drivers.exe	92
PID 4524 wrote to memory of 3100	4524	drivers.exe	92
PID 4524 wrote to memory of 1692	4524	drivers.exe	96
PID 4524 wrote to memory of 1692	4524	drivers.exe	96
PID 4524 wrote to memory of 2140	4524	drivers.exe	98
PID 4524 wrote to memory of 2140	4524	drivers.exe	98
PID 4524 wrote to memory of 2484	4524	drivers.exe	101
PID 4524 wrote to memory of 2484	4524	drivers.exe	101
PID 4524 wrote to memory of 1048	4524	drivers.exe	103
PID 4524 wrote to memory of 1048	4524	drivers.exe	103
PID 4524 wrote to memory of 2560	4524	drivers.exe	105
PID 4524 wrote to memory of 2560	4524	drivers.exe	105
PID 4524 wrote to memory of 2828	4524	drivers.exe	107
PID 4524 wrote to memory of 2828	4524	drivers.exe	107
PID 4524 wrote to memory of 456	4524	drivers.exe	109
PID 4524 wrote to memory of 456	4524	drivers.exe	109

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:4524
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3972
- 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:3192
- 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:3100
- 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:1692
- 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:2140
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2484
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1048
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2560
- 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:2828
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:456

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
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
948B

MD5
0b8cb2e6dd5794b6a56a4bdbbd430fd7

SHA1
2b08e348c3489c6a35761af073018e3784c12074

SHA256
bcce0d44e33747e4c39df9afbd0a4e98a47ded0188375e4dfdd94cafbb366e1f

SHA512
15ce3b588aa80899f69b0313c7e188d886bddbd09783ca732ac33f9ae8e4e017a72b6f98919f581383a4582732575e5faedb0dea87e01cf2b657424945fdf4d2

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
7511c81925750deb7ad1b9b80eea8a8d

SHA1
6ea759b3cbd243ae11435c6d6c5ced185eb01f49

SHA256
5b49723a7773f2fe1f6093236e7b9b2c546f0873635d02346cb39535811234fa

SHA512
5f7e69316d39525d137a7a833f8c746ceef8f1b2295348393fb3244cca8b962fbaad0f7da49da453fe97e2c49b1f41f06138111ac5ff97fdc33c300350ec3a1b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_rrsjs1ap.1d5.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3192-4-0x00007FF80A7A0000-0x00007FF80B261000-memory.dmp

Filesize
10.8MB

Download
memory/3192-15-0x00007FF80A7A0000-0x00007FF80B261000-memory.dmp

Filesize
10.8MB

Download
memory/3192-11-0x000001E367990000-0x000001E3679B2000-memory.dmp

Filesize
136KB

Download
memory/3192-18-0x000001E367AC0000-0x000001E367C2A000-memory.dmp

Filesize
1.4MB

Download
memory/3192-19-0x00007FF80A7A0000-0x00007FF80B261000-memory.dmp

Filesize
10.8MB

Download
memory/3192-3-0x00007FF80A7A0000-0x00007FF80B261000-memory.dmp

Filesize
10.8MB

Download
memory/4524-1-0x0000026E63780000-0x0000026E637C0000-memory.dmp

Filesize
256KB

Download
memory/4524-35-0x0000026E65440000-0x0000026E65490000-memory.dmp

Filesize
320KB

Download
memory/4524-36-0x0000026E65410000-0x0000026E6542E000-memory.dmp

Filesize
120KB

Download
memory/4524-0-0x00007FF80A7A3000-0x00007FF80A7A5000-memory.dmp

Filesize
8KB

Download
memory/4524-34-0x0000026E7DED0000-0x0000026E7DF46000-memory.dmp

Filesize
472KB

Download
memory/4524-73-0x0000026E7ED50000-0x0000026E7ED62000-memory.dmp

Filesize
72KB

Download
memory/4524-72-0x0000026E7DF50000-0x0000026E7DF5A000-memory.dmp

Filesize
40KB

Download
memory/4524-2-0x00007FF80A7A0000-0x00007FF80B261000-memory.dmp

Filesize
10.8MB

Download
memory/4524-91-0x00007FF80A7A0000-0x00007FF80B261000-memory.dmp

Filesize
10.8MB

Download