umbral | 5c37ed0542974bf478e1e6ff614395e6110bfc4726494e72f76b62e014bda0ff

Analysis

max time kernel
135s
max time network
127s
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
behavioral2/memory/2072-1-0x000001F79FDD0000-0x000001F79FE10000-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
5024	powershell.exe
2868	powershell.exe
3080	powershell.exe
2356	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
34	discord.com
35	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
15	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2592	wmic.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
2072	drivers.exe
5024	powershell.exe
5024	powershell.exe
2868	powershell.exe
2868	powershell.exe
3080	powershell.exe
3080	powershell.exe
4048	powershell.exe
4048	powershell.exe
2356	powershell.exe
2356	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2072	drivers.exe
Token: SeIncreaseQuotaPrivilege	696	wmic.exe
Token: SeSecurityPrivilege	696	wmic.exe
Token: SeTakeOwnershipPrivilege	696	wmic.exe
Token: SeLoadDriverPrivilege	696	wmic.exe
Token: SeSystemProfilePrivilege	696	wmic.exe
Token: SeSystemtimePrivilege	696	wmic.exe
Token: SeProfSingleProcessPrivilege	696	wmic.exe
Token: SeIncBasePriorityPrivilege	696	wmic.exe
Token: SeCreatePagefilePrivilege	696	wmic.exe
Token: SeBackupPrivilege	696	wmic.exe
Token: SeRestorePrivilege	696	wmic.exe
Token: SeShutdownPrivilege	696	wmic.exe
Token: SeDebugPrivilege	696	wmic.exe
Token: SeSystemEnvironmentPrivilege	696	wmic.exe
Token: SeRemoteShutdownPrivilege	696	wmic.exe
Token: SeUndockPrivilege	696	wmic.exe
Token: SeManageVolumePrivilege	696	wmic.exe
Token: 33	696	wmic.exe
Token: 34	696	wmic.exe
Token: 35	696	wmic.exe
Token: 36	696	wmic.exe
Token: SeIncreaseQuotaPrivilege	696	wmic.exe
Token: SeSecurityPrivilege	696	wmic.exe
Token: SeTakeOwnershipPrivilege	696	wmic.exe
Token: SeLoadDriverPrivilege	696	wmic.exe
Token: SeSystemProfilePrivilege	696	wmic.exe
Token: SeSystemtimePrivilege	696	wmic.exe
Token: SeProfSingleProcessPrivilege	696	wmic.exe
Token: SeIncBasePriorityPrivilege	696	wmic.exe
Token: SeCreatePagefilePrivilege	696	wmic.exe
Token: SeBackupPrivilege	696	wmic.exe
Token: SeRestorePrivilege	696	wmic.exe
Token: SeShutdownPrivilege	696	wmic.exe
Token: SeDebugPrivilege	696	wmic.exe
Token: SeSystemEnvironmentPrivilege	696	wmic.exe
Token: SeRemoteShutdownPrivilege	696	wmic.exe
Token: SeUndockPrivilege	696	wmic.exe
Token: SeManageVolumePrivilege	696	wmic.exe
Token: 33	696	wmic.exe
Token: 34	696	wmic.exe
Token: 35	696	wmic.exe
Token: 36	696	wmic.exe
Token: SeDebugPrivilege	5024	powershell.exe
Token: SeDebugPrivilege	2868	powershell.exe
Token: SeDebugPrivilege	3080	powershell.exe
Token: SeDebugPrivilege	4048	powershell.exe
Token: SeIncreaseQuotaPrivilege	1456	wmic.exe
Token: SeSecurityPrivilege	1456	wmic.exe
Token: SeTakeOwnershipPrivilege	1456	wmic.exe
Token: SeLoadDriverPrivilege	1456	wmic.exe
Token: SeSystemProfilePrivilege	1456	wmic.exe
Token: SeSystemtimePrivilege	1456	wmic.exe
Token: SeProfSingleProcessPrivilege	1456	wmic.exe
Token: SeIncBasePriorityPrivilege	1456	wmic.exe
Token: SeCreatePagefilePrivilege	1456	wmic.exe
Token: SeBackupPrivilege	1456	wmic.exe
Token: SeRestorePrivilege	1456	wmic.exe
Token: SeShutdownPrivilege	1456	wmic.exe
Token: SeDebugPrivilege	1456	wmic.exe
Token: SeSystemEnvironmentPrivilege	1456	wmic.exe
Token: SeRemoteShutdownPrivilege	1456	wmic.exe
Token: SeUndockPrivilege	1456	wmic.exe
Token: SeManageVolumePrivilege	1456	wmic.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2072 wrote to memory of 696	2072	drivers.exe	87
PID 2072 wrote to memory of 696	2072	drivers.exe	87
PID 2072 wrote to memory of 5024	2072	drivers.exe	91
PID 2072 wrote to memory of 5024	2072	drivers.exe	91
PID 2072 wrote to memory of 2868	2072	drivers.exe	93
PID 2072 wrote to memory of 2868	2072	drivers.exe	93
PID 2072 wrote to memory of 3080	2072	drivers.exe	95
PID 2072 wrote to memory of 3080	2072	drivers.exe	95
PID 2072 wrote to memory of 4048	2072	drivers.exe	97
PID 2072 wrote to memory of 4048	2072	drivers.exe	97
PID 2072 wrote to memory of 1456	2072	drivers.exe	99
PID 2072 wrote to memory of 1456	2072	drivers.exe	99
PID 2072 wrote to memory of 2848	2072	drivers.exe	101
PID 2072 wrote to memory of 2848	2072	drivers.exe	101
PID 2072 wrote to memory of 2956	2072	drivers.exe	103
PID 2072 wrote to memory of 2956	2072	drivers.exe	103
PID 2072 wrote to memory of 2356	2072	drivers.exe	105
PID 2072 wrote to memory of 2356	2072	drivers.exe	105
PID 2072 wrote to memory of 2592	2072	drivers.exe	107
PID 2072 wrote to memory of 2592	2072	drivers.exe	107

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:2072
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:696
- 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:5024
- 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:2868
- 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:3080
- 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:4048
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1456
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2848
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2956
- 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:2356
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2592

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
d28a889fd956d5cb3accfbaf1143eb6f

SHA1
157ba54b365341f8ff06707d996b3635da8446f7

SHA256
21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

SHA512
0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

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

Filesize
948B

MD5
c9b6705519e1eef08f86c4ba5f4286f3

SHA1
6c6b179e452ecee2673a1d4fe128f1c06f70577f

SHA256
0f9cad44a79126871580e19b01dc3f880c5173b1faaf8b9018d5d1f829714705

SHA512
6d8f85a7a8b0b124530f36a157cd0441b5c1eacdc35e274af9fbf0569d03d1d5e468651a5b2425f0215c282ecfa7b1ffeaeeaf18612822f00bd14306d30640c7

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
56b542f1ce46030f16d317e31e4c7a50

SHA1
007a94b17a78b8584fe6cfecdeaf476bdefcf7f9

SHA256
a4ca0c6358d00f4419c9785dbdab7ff1837131ebde04f1b6e8a0cc0678993551

SHA512
fdc4c46f90645a09360e2923c377ba068a408b7c381b99e28079a6249f0f1599db077a9edec15da57e989dfca9f8f7a12aa685edd53af446acdd53958aa08b08

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_kk5sgjcz.11z.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2072-34-0x000001F7A1D00000-0x000001F7A1D50000-memory.dmp

Filesize
320KB

Download
memory/2072-2-0x00007FF86E120000-0x00007FF86EBE1000-memory.dmp

Filesize
10.8MB

Download
memory/2072-94-0x00007FF86E120000-0x00007FF86EBE1000-memory.dmp

Filesize
10.8MB

Download
memory/2072-93-0x000001F7BA770000-0x000001F7BA919000-memory.dmp

Filesize
1.7MB

Download
memory/2072-89-0x000001F7BA770000-0x000001F7BA919000-memory.dmp

Filesize
1.7MB

Download
memory/2072-33-0x000001F7BA520000-0x000001F7BA596000-memory.dmp

Filesize
472KB

Download
memory/2072-0-0x00007FF86E123000-0x00007FF86E125000-memory.dmp

Filesize
8KB

Download
memory/2072-35-0x000001F7BA620000-0x000001F7BA63E000-memory.dmp

Filesize
120KB

Download
memory/2072-88-0x00007FF86E120000-0x00007FF86EBE1000-memory.dmp

Filesize
10.8MB

Download
memory/2072-87-0x00007FF86E123000-0x00007FF86E125000-memory.dmp

Filesize
8KB

Download
memory/2072-71-0x000001F7A1CD0000-0x000001F7A1CDA000-memory.dmp

Filesize
40KB

Download
memory/2072-72-0x000001F7BA5A0000-0x000001F7BA5B2000-memory.dmp

Filesize
72KB

Download
memory/2072-1-0x000001F79FDD0000-0x000001F79FE10000-memory.dmp

Filesize
256KB

Download
memory/5024-15-0x00007FF86E120000-0x00007FF86EBE1000-memory.dmp

Filesize
10.8MB

Download
memory/5024-3-0x00007FF86E120000-0x00007FF86EBE1000-memory.dmp

Filesize
10.8MB

Download
memory/5024-9-0x0000012E4ACF0000-0x0000012E4AD12000-memory.dmp

Filesize
136KB

Download
memory/5024-14-0x00007FF86E120000-0x00007FF86EBE1000-memory.dmp

Filesize
10.8MB

Download
memory/5024-18-0x00007FF86E120000-0x00007FF86EBE1000-memory.dmp

Filesize
10.8MB

Download