umbral | 183ef3c129d5ae9cc4070d9f1c2f276fe2ee4f72b9a1498c7f88d808e9f65a92

Analysis

max time kernel
32s
max time network
35s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
31-08-2024 22:28

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General

Target

Umbral.exe
Size

232KB
MD5

c06d5c52b73ea9b584856d085b5e602a
SHA1

11d87e26def16f81e25be667b92ae0a1f18b4f53
SHA256

183ef3c129d5ae9cc4070d9f1c2f276fe2ee4f72b9a1498c7f88d808e9f65a92
SHA512

0aa2513e17baae624c66a9284ad440f7112d80f5b3fff59a4285876b61ae7512ae6ce226d2a89c77506a19810813db7d18b912394f7c323b57fdcc13ac8d6a76
SSDEEP

6144:RloZMArIkd8g+EtXHkv/iD4K6k+1ZHMgPfu35EwF1zb8e1mKFo6i:joZHL+EP8K6k+1ZHMgPfu35EwF9pFK

Score

10^/10

umbral credential_access execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/1180-1-0x000001B2F9580000-0x000001B2F95C0000-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

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
864	powershell.exe
1224	powershell.exe
4972	powershell.exe
4472	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	Umbral.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
26	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
12	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
5000	wmic.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
4472	powershell.exe
4472	powershell.exe
4972	powershell.exe
4972	powershell.exe
864	powershell.exe
864	powershell.exe
2176	powershell.exe
2176	powershell.exe
1224	powershell.exe
1224	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1180	Umbral.exe
Token: SeDebugPrivilege	4472	powershell.exe
Token: SeDebugPrivilege	4972	powershell.exe
Token: SeDebugPrivilege	864	powershell.exe
Token: SeDebugPrivilege	2176	powershell.exe
Token: SeIncreaseQuotaPrivilege	3288	wmic.exe
Token: SeSecurityPrivilege	3288	wmic.exe
Token: SeTakeOwnershipPrivilege	3288	wmic.exe
Token: SeLoadDriverPrivilege	3288	wmic.exe
Token: SeSystemProfilePrivilege	3288	wmic.exe
Token: SeSystemtimePrivilege	3288	wmic.exe
Token: SeProfSingleProcessPrivilege	3288	wmic.exe
Token: SeIncBasePriorityPrivilege	3288	wmic.exe
Token: SeCreatePagefilePrivilege	3288	wmic.exe
Token: SeBackupPrivilege	3288	wmic.exe
Token: SeRestorePrivilege	3288	wmic.exe
Token: SeShutdownPrivilege	3288	wmic.exe
Token: SeDebugPrivilege	3288	wmic.exe
Token: SeSystemEnvironmentPrivilege	3288	wmic.exe
Token: SeRemoteShutdownPrivilege	3288	wmic.exe
Token: SeUndockPrivilege	3288	wmic.exe
Token: SeManageVolumePrivilege	3288	wmic.exe
Token: 33	3288	wmic.exe
Token: 34	3288	wmic.exe
Token: 35	3288	wmic.exe
Token: 36	3288	wmic.exe
Token: SeIncreaseQuotaPrivilege	3288	wmic.exe
Token: SeSecurityPrivilege	3288	wmic.exe
Token: SeTakeOwnershipPrivilege	3288	wmic.exe
Token: SeLoadDriverPrivilege	3288	wmic.exe
Token: SeSystemProfilePrivilege	3288	wmic.exe
Token: SeSystemtimePrivilege	3288	wmic.exe
Token: SeProfSingleProcessPrivilege	3288	wmic.exe
Token: SeIncBasePriorityPrivilege	3288	wmic.exe
Token: SeCreatePagefilePrivilege	3288	wmic.exe
Token: SeBackupPrivilege	3288	wmic.exe
Token: SeRestorePrivilege	3288	wmic.exe
Token: SeShutdownPrivilege	3288	wmic.exe
Token: SeDebugPrivilege	3288	wmic.exe
Token: SeSystemEnvironmentPrivilege	3288	wmic.exe
Token: SeRemoteShutdownPrivilege	3288	wmic.exe
Token: SeUndockPrivilege	3288	wmic.exe
Token: SeManageVolumePrivilege	3288	wmic.exe
Token: 33	3288	wmic.exe
Token: 34	3288	wmic.exe
Token: 35	3288	wmic.exe
Token: 36	3288	wmic.exe
Token: SeIncreaseQuotaPrivilege	2276	wmic.exe
Token: SeSecurityPrivilege	2276	wmic.exe
Token: SeTakeOwnershipPrivilege	2276	wmic.exe
Token: SeLoadDriverPrivilege	2276	wmic.exe
Token: SeSystemProfilePrivilege	2276	wmic.exe
Token: SeSystemtimePrivilege	2276	wmic.exe
Token: SeProfSingleProcessPrivilege	2276	wmic.exe
Token: SeIncBasePriorityPrivilege	2276	wmic.exe
Token: SeCreatePagefilePrivilege	2276	wmic.exe
Token: SeBackupPrivilege	2276	wmic.exe
Token: SeRestorePrivilege	2276	wmic.exe
Token: SeShutdownPrivilege	2276	wmic.exe
Token: SeDebugPrivilege	2276	wmic.exe
Token: SeSystemEnvironmentPrivilege	2276	wmic.exe
Token: SeRemoteShutdownPrivilege	2276	wmic.exe
Token: SeUndockPrivilege	2276	wmic.exe
Token: SeManageVolumePrivilege	2276	wmic.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 1180 wrote to memory of 4472	1180	Umbral.exe	86
PID 1180 wrote to memory of 4472	1180	Umbral.exe	86
PID 1180 wrote to memory of 4972	1180	Umbral.exe	90
PID 1180 wrote to memory of 4972	1180	Umbral.exe	90
PID 1180 wrote to memory of 864	1180	Umbral.exe	92
PID 1180 wrote to memory of 864	1180	Umbral.exe	92
PID 1180 wrote to memory of 2176	1180	Umbral.exe	94
PID 1180 wrote to memory of 2176	1180	Umbral.exe	94
PID 1180 wrote to memory of 3288	1180	Umbral.exe	97
PID 1180 wrote to memory of 3288	1180	Umbral.exe	97
PID 1180 wrote to memory of 2276	1180	Umbral.exe	100
PID 1180 wrote to memory of 2276	1180	Umbral.exe	100
PID 1180 wrote to memory of 1572	1180	Umbral.exe	102
PID 1180 wrote to memory of 1572	1180	Umbral.exe	102
PID 1180 wrote to memory of 1224	1180	Umbral.exe	104
PID 1180 wrote to memory of 1224	1180	Umbral.exe	104
PID 1180 wrote to memory of 5000	1180	Umbral.exe	106
PID 1180 wrote to memory of 5000	1180	Umbral.exe	106

C:\Users\Admin\AppData\Local\Temp\Umbral.exe
"C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1180
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Umbral.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4472
- 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:4972
- 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:864
- 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:2176
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3288
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2276
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1572
- 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:1224
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:5000

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
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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
d3235ed022a42ec4338123ab87144afa

SHA1
5058608bc0deb720a585a2304a8f7cf63a50a315

SHA256
10663f5a1cb0afe5578f61ebaae2aafb363544e47b48521f9c23be9e6e431b27

SHA512
236761b7c68feca8bd62cba90cff0b25fac5613837aaa5d29ae823ace8b06a2057553cf7e72b11ccc59b6c289e471ca1bbac1a880aef5e2868875371a17c1abf

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

Filesize
1KB

MD5
da7d82d98e2d9ba6e556da586acb1a1c

SHA1
bfdd4afd250eb47622feaae0d2a514f2a679c2cf

SHA256
5124c54542b89c2ad50803fefdd2d4de0388405b05b3044acc1cb46692f16374

SHA512
db63cf20a6b14d339ff40c4489ea4b85a838e9692e13ee28fca73022bed5bade8d4a8bc4c1871b24f9bc1829771e0ec2ac6e746a023f744066915924009cf10d

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_u4opnfqk.ngg.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1180-71-0x000001B2FBC70000-0x000001B2FBC7A000-memory.dmp

Filesize
40KB

Download
memory/1180-35-0x000001B2F9A20000-0x000001B2F9A3E000-memory.dmp

Filesize
120KB

Download
memory/1180-92-0x00007FF9CBF60000-0x00007FF9CCA21000-memory.dmp

Filesize
10.8MB

Download
memory/1180-88-0x00007FF9CBF60000-0x00007FF9CCA21000-memory.dmp

Filesize
10.8MB

Download
memory/1180-2-0x00007FF9CBF60000-0x00007FF9CCA21000-memory.dmp

Filesize
10.8MB

Download
memory/1180-33-0x000001B2FBCE0000-0x000001B2FBD56000-memory.dmp

Filesize
472KB

Download
memory/1180-34-0x000001B2FBD60000-0x000001B2FBDB0000-memory.dmp

Filesize
320KB

Download
memory/1180-87-0x00007FF9CBF63000-0x00007FF9CBF65000-memory.dmp

Filesize
8KB

Download
memory/1180-1-0x000001B2F9580000-0x000001B2F95C0000-memory.dmp

Filesize
256KB

Download
memory/1180-0-0x00007FF9CBF63000-0x00007FF9CBF65000-memory.dmp

Filesize
8KB

Download
memory/1180-72-0x000001B2FBCB0000-0x000001B2FBCC2000-memory.dmp

Filesize
72KB

Download
memory/4472-3-0x000001EAA4710000-0x000001EAA4732000-memory.dmp

Filesize
136KB

Download
memory/4472-13-0x00007FF9CBF60000-0x00007FF9CCA21000-memory.dmp

Filesize
10.8MB

Download
memory/4472-15-0x00007FF9CBF60000-0x00007FF9CCA21000-memory.dmp

Filesize
10.8MB

Download
memory/4472-14-0x00007FF9CBF60000-0x00007FF9CCA21000-memory.dmp

Filesize
10.8MB

Download
memory/4472-18-0x00007FF9CBF60000-0x00007FF9CCA21000-memory.dmp

Filesize
10.8MB

Download