umbral | 20c0ffaba031d92ff2346793e00bb14595bc2700ed31566454bf642672f3a0df

Analysis

max time kernel
104s
max time network
105s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
16-08-2024 17:32

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General

Target

b58eafa327d4fb65a156dd947ef01f40N.exe
Size

231KB
MD5

b58eafa327d4fb65a156dd947ef01f40
SHA1

45140af55394b97cfc2f2d94846a1bcba54a61a5
SHA256

20c0ffaba031d92ff2346793e00bb14595bc2700ed31566454bf642672f3a0df
SHA512

7a764ce2f9bdcda59ca91cd6764c1e80f86434ae6708f54ee33ed4e9519b348d33b3384cb228a29614a3524ce84d231486f2715b6b9eb7655ed9b78e69cf6bbb
SSDEEP

6144:xloZMLrIkd8g+EtXHkv/iD4FGvXKaL7W8e1m06i:DoZ0L+EP8kvjwL/

Score

10^/10

umbral credential_access execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/4208-1-0x000001E58B480000-0x000001E58B4C0000-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
1464	powershell.exe
1628	powershell.exe
388	powershell.exe
5068	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	b58eafa327d4fb65a156dd947ef01f40N.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
28	discord.com
29	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
8	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
116	wmic.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
4208	b58eafa327d4fb65a156dd947ef01f40N.exe
1464	powershell.exe
1464	powershell.exe
1628	powershell.exe
1628	powershell.exe
388	powershell.exe
388	powershell.exe
3116	powershell.exe
3116	powershell.exe
5068	powershell.exe
5068	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4208	b58eafa327d4fb65a156dd947ef01f40N.exe
Token: SeIncreaseQuotaPrivilege	5088	wmic.exe
Token: SeSecurityPrivilege	5088	wmic.exe
Token: SeTakeOwnershipPrivilege	5088	wmic.exe
Token: SeLoadDriverPrivilege	5088	wmic.exe
Token: SeSystemProfilePrivilege	5088	wmic.exe
Token: SeSystemtimePrivilege	5088	wmic.exe
Token: SeProfSingleProcessPrivilege	5088	wmic.exe
Token: SeIncBasePriorityPrivilege	5088	wmic.exe
Token: SeCreatePagefilePrivilege	5088	wmic.exe
Token: SeBackupPrivilege	5088	wmic.exe
Token: SeRestorePrivilege	5088	wmic.exe
Token: SeShutdownPrivilege	5088	wmic.exe
Token: SeDebugPrivilege	5088	wmic.exe
Token: SeSystemEnvironmentPrivilege	5088	wmic.exe
Token: SeRemoteShutdownPrivilege	5088	wmic.exe
Token: SeUndockPrivilege	5088	wmic.exe
Token: SeManageVolumePrivilege	5088	wmic.exe
Token: 33	5088	wmic.exe
Token: 34	5088	wmic.exe
Token: 35	5088	wmic.exe
Token: 36	5088	wmic.exe
Token: SeIncreaseQuotaPrivilege	5088	wmic.exe
Token: SeSecurityPrivilege	5088	wmic.exe
Token: SeTakeOwnershipPrivilege	5088	wmic.exe
Token: SeLoadDriverPrivilege	5088	wmic.exe
Token: SeSystemProfilePrivilege	5088	wmic.exe
Token: SeSystemtimePrivilege	5088	wmic.exe
Token: SeProfSingleProcessPrivilege	5088	wmic.exe
Token: SeIncBasePriorityPrivilege	5088	wmic.exe
Token: SeCreatePagefilePrivilege	5088	wmic.exe
Token: SeBackupPrivilege	5088	wmic.exe
Token: SeRestorePrivilege	5088	wmic.exe
Token: SeShutdownPrivilege	5088	wmic.exe
Token: SeDebugPrivilege	5088	wmic.exe
Token: SeSystemEnvironmentPrivilege	5088	wmic.exe
Token: SeRemoteShutdownPrivilege	5088	wmic.exe
Token: SeUndockPrivilege	5088	wmic.exe
Token: SeManageVolumePrivilege	5088	wmic.exe
Token: 33	5088	wmic.exe
Token: 34	5088	wmic.exe
Token: 35	5088	wmic.exe
Token: 36	5088	wmic.exe
Token: SeDebugPrivilege	1464	powershell.exe
Token: SeDebugPrivilege	1628	powershell.exe
Token: SeDebugPrivilege	388	powershell.exe
Token: SeDebugPrivilege	3116	powershell.exe
Token: SeIncreaseQuotaPrivilege	4900	wmic.exe
Token: SeSecurityPrivilege	4900	wmic.exe
Token: SeTakeOwnershipPrivilege	4900	wmic.exe
Token: SeLoadDriverPrivilege	4900	wmic.exe
Token: SeSystemProfilePrivilege	4900	wmic.exe
Token: SeSystemtimePrivilege	4900	wmic.exe
Token: SeProfSingleProcessPrivilege	4900	wmic.exe
Token: SeIncBasePriorityPrivilege	4900	wmic.exe
Token: SeCreatePagefilePrivilege	4900	wmic.exe
Token: SeBackupPrivilege	4900	wmic.exe
Token: SeRestorePrivilege	4900	wmic.exe
Token: SeShutdownPrivilege	4900	wmic.exe
Token: SeDebugPrivilege	4900	wmic.exe
Token: SeSystemEnvironmentPrivilege	4900	wmic.exe
Token: SeRemoteShutdownPrivilege	4900	wmic.exe
Token: SeUndockPrivilege	4900	wmic.exe
Token: SeManageVolumePrivilege	4900	wmic.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 4208 wrote to memory of 5088	4208	b58eafa327d4fb65a156dd947ef01f40N.exe	84
PID 4208 wrote to memory of 5088	4208	b58eafa327d4fb65a156dd947ef01f40N.exe	84
PID 4208 wrote to memory of 1464	4208	b58eafa327d4fb65a156dd947ef01f40N.exe	89
PID 4208 wrote to memory of 1464	4208	b58eafa327d4fb65a156dd947ef01f40N.exe	89
PID 4208 wrote to memory of 1628	4208	b58eafa327d4fb65a156dd947ef01f40N.exe	92
PID 4208 wrote to memory of 1628	4208	b58eafa327d4fb65a156dd947ef01f40N.exe	92
PID 4208 wrote to memory of 388	4208	b58eafa327d4fb65a156dd947ef01f40N.exe	94
PID 4208 wrote to memory of 388	4208	b58eafa327d4fb65a156dd947ef01f40N.exe	94
PID 4208 wrote to memory of 3116	4208	b58eafa327d4fb65a156dd947ef01f40N.exe	96
PID 4208 wrote to memory of 3116	4208	b58eafa327d4fb65a156dd947ef01f40N.exe	96
PID 4208 wrote to memory of 4900	4208	b58eafa327d4fb65a156dd947ef01f40N.exe	100
PID 4208 wrote to memory of 4900	4208	b58eafa327d4fb65a156dd947ef01f40N.exe	100
PID 4208 wrote to memory of 1544	4208	b58eafa327d4fb65a156dd947ef01f40N.exe	102
PID 4208 wrote to memory of 1544	4208	b58eafa327d4fb65a156dd947ef01f40N.exe	102
PID 4208 wrote to memory of 2332	4208	b58eafa327d4fb65a156dd947ef01f40N.exe	104
PID 4208 wrote to memory of 2332	4208	b58eafa327d4fb65a156dd947ef01f40N.exe	104
PID 4208 wrote to memory of 5068	4208	b58eafa327d4fb65a156dd947ef01f40N.exe	106
PID 4208 wrote to memory of 5068	4208	b58eafa327d4fb65a156dd947ef01f40N.exe	106
PID 4208 wrote to memory of 116	4208	b58eafa327d4fb65a156dd947ef01f40N.exe	109
PID 4208 wrote to memory of 116	4208	b58eafa327d4fb65a156dd947ef01f40N.exe	109

C:\Users\Admin\AppData\Local\Temp\b58eafa327d4fb65a156dd947ef01f40N.exe
"C:\Users\Admin\AppData\Local\Temp\b58eafa327d4fb65a156dd947ef01f40N.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4208
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:5088
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\b58eafa327d4fb65a156dd947ef01f40N.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1464
- 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:1628
- 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:388
- 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:3116
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4900
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1544
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2332
- 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:5068
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:116

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

Replay Monitor

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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
6d42b6da621e8df5674e26b799c8e2aa

SHA1
ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

SHA256
5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

SHA512
53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

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

Filesize
948B

MD5
2af06a6b36db9473e4a7d9c7ab72b70b

SHA1
8ef34b9b961e51bdd1b8d7d9db2ec1b0a4764645

SHA256
18a2aa7e245c6732f95fb7749b2b4d29007f2c56a9c5bfbc5e3c127bdfe5f158

SHA512
3495567a5d5af94ae27be51313d9e2630c52017d808042fe0d56baa34fa1d246eb15c253d14c77c77a1d8f2f1c81680e623044ae95415b095696e7fa141ac7cf

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
ec1ba4a995d866b282087b26a0539bbc

SHA1
c4aeae2bc3fa9a898680648b20102f01e8a811cf

SHA256
469da678c3c0364b1b511962cffd44cbfc10aab5c1c528c0c09fd952f08d8a2c

SHA512
07bf757ec9d0d368d3ef1bfc2b562895e2708757f8fefa04fa50beaa6fb38af1018ea0cfccf5666c5c8baa4c894deead9652c53e0608aa6a83ef5b396dba43e9

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_qdy0gpui.sbe.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1464-4-0x00007FF811F20000-0x00007FF8129E1000-memory.dmp

Filesize
10.8MB

Download
memory/1464-5-0x00007FF811F20000-0x00007FF8129E1000-memory.dmp

Filesize
10.8MB

Download
memory/1464-15-0x00000180D0610000-0x00000180D0632000-memory.dmp

Filesize
136KB

Download
memory/1464-18-0x00007FF811F20000-0x00007FF8129E1000-memory.dmp

Filesize
10.8MB

Download
memory/1464-3-0x00007FF811F20000-0x00007FF8129E1000-memory.dmp

Filesize
10.8MB

Download
memory/4208-34-0x000001E5A5C60000-0x000001E5A5CB0000-memory.dmp

Filesize
320KB

Download
memory/4208-32-0x000001E5A5BE0000-0x000001E5A5C56000-memory.dmp

Filesize
472KB

Download
memory/4208-35-0x000001E5A5B50000-0x000001E5A5B6E000-memory.dmp

Filesize
120KB

Download
memory/4208-1-0x000001E58B480000-0x000001E58B4C0000-memory.dmp

Filesize
256KB

Download
memory/4208-0-0x00007FF811F23000-0x00007FF811F25000-memory.dmp

Filesize
8KB

Download
memory/4208-71-0x000001E5A5B40000-0x000001E5A5B4A000-memory.dmp

Filesize
40KB

Download
memory/4208-72-0x000001E5A5B90000-0x000001E5A5BA2000-memory.dmp

Filesize
72KB

Download
memory/4208-2-0x00007FF811F20000-0x00007FF8129E1000-memory.dmp

Filesize
10.8MB

Download
memory/4208-91-0x00007FF811F20000-0x00007FF8129E1000-memory.dmp

Filesize
10.8MB

Download
memory/5068-86-0x000001D2AAD70000-0x000001D2AAF8C000-memory.dmp

Filesize
2.1MB

Download