umbral | 0ddc72fe91b271d21fbaafd017168c9b5370d362d7bd3e60928490ab4d1fac96

Analysis

max time kernel
93s
max time network
125s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
03-08-2024 17:48

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General

Target

Umbral1.exe
Size

227KB
MD5

f6aeb1204375bc9a4ea0cfa7a1a76ba5
SHA1

e659b3e54d32f44bf915d64c51bb512e58a7eeea
SHA256

0ddc72fe91b271d21fbaafd017168c9b5370d362d7bd3e60928490ab4d1fac96
SHA512

75ffba3ec1f5e05684ab0b99af42a518735324355745f0f9e3ba057627b746a948b86331e281db1bc2064f504af334118cb29807cb97b6579723e144d7acbd41
SSDEEP

6144:+loZMLrIkd8g+EtXHkv/iD44VShOsTPkZFQu//OzCb8e1mJdi:ooZ0L+EP84VShOsTPkZFQu//O6B

Score

10^/10

umbral credential_access execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/3160-0-0x0000019583E10000-0x0000019583E50000-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
2292	powershell.exe
4580	powershell.exe
2500	powershell.exe
1768	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	Umbral1.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
21	discord.com
22	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
5	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2036	wmic.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
3160	Umbral1.exe
2292	powershell.exe
2292	powershell.exe
4580	powershell.exe
4580	powershell.exe
2500	powershell.exe
2500	powershell.exe
1264	powershell.exe
1264	powershell.exe
1768	powershell.exe
1768	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3160	Umbral1.exe
Token: SeIncreaseQuotaPrivilege	2896	wmic.exe
Token: SeSecurityPrivilege	2896	wmic.exe
Token: SeTakeOwnershipPrivilege	2896	wmic.exe
Token: SeLoadDriverPrivilege	2896	wmic.exe
Token: SeSystemProfilePrivilege	2896	wmic.exe
Token: SeSystemtimePrivilege	2896	wmic.exe
Token: SeProfSingleProcessPrivilege	2896	wmic.exe
Token: SeIncBasePriorityPrivilege	2896	wmic.exe
Token: SeCreatePagefilePrivilege	2896	wmic.exe
Token: SeBackupPrivilege	2896	wmic.exe
Token: SeRestorePrivilege	2896	wmic.exe
Token: SeShutdownPrivilege	2896	wmic.exe
Token: SeDebugPrivilege	2896	wmic.exe
Token: SeSystemEnvironmentPrivilege	2896	wmic.exe
Token: SeRemoteShutdownPrivilege	2896	wmic.exe
Token: SeUndockPrivilege	2896	wmic.exe
Token: SeManageVolumePrivilege	2896	wmic.exe
Token: 33	2896	wmic.exe
Token: 34	2896	wmic.exe
Token: 35	2896	wmic.exe
Token: 36	2896	wmic.exe
Token: SeIncreaseQuotaPrivilege	2896	wmic.exe
Token: SeSecurityPrivilege	2896	wmic.exe
Token: SeTakeOwnershipPrivilege	2896	wmic.exe
Token: SeLoadDriverPrivilege	2896	wmic.exe
Token: SeSystemProfilePrivilege	2896	wmic.exe
Token: SeSystemtimePrivilege	2896	wmic.exe
Token: SeProfSingleProcessPrivilege	2896	wmic.exe
Token: SeIncBasePriorityPrivilege	2896	wmic.exe
Token: SeCreatePagefilePrivilege	2896	wmic.exe
Token: SeBackupPrivilege	2896	wmic.exe
Token: SeRestorePrivilege	2896	wmic.exe
Token: SeShutdownPrivilege	2896	wmic.exe
Token: SeDebugPrivilege	2896	wmic.exe
Token: SeSystemEnvironmentPrivilege	2896	wmic.exe
Token: SeRemoteShutdownPrivilege	2896	wmic.exe
Token: SeUndockPrivilege	2896	wmic.exe
Token: SeManageVolumePrivilege	2896	wmic.exe
Token: 33	2896	wmic.exe
Token: 34	2896	wmic.exe
Token: 35	2896	wmic.exe
Token: 36	2896	wmic.exe
Token: SeDebugPrivilege	2292	powershell.exe
Token: SeDebugPrivilege	4580	powershell.exe
Token: SeDebugPrivilege	2500	powershell.exe
Token: SeDebugPrivilege	1264	powershell.exe
Token: SeIncreaseQuotaPrivilege	3492	wmic.exe
Token: SeSecurityPrivilege	3492	wmic.exe
Token: SeTakeOwnershipPrivilege	3492	wmic.exe
Token: SeLoadDriverPrivilege	3492	wmic.exe
Token: SeSystemProfilePrivilege	3492	wmic.exe
Token: SeSystemtimePrivilege	3492	wmic.exe
Token: SeProfSingleProcessPrivilege	3492	wmic.exe
Token: SeIncBasePriorityPrivilege	3492	wmic.exe
Token: SeCreatePagefilePrivilege	3492	wmic.exe
Token: SeBackupPrivilege	3492	wmic.exe
Token: SeRestorePrivilege	3492	wmic.exe
Token: SeShutdownPrivilege	3492	wmic.exe
Token: SeDebugPrivilege	3492	wmic.exe
Token: SeSystemEnvironmentPrivilege	3492	wmic.exe
Token: SeRemoteShutdownPrivilege	3492	wmic.exe
Token: SeUndockPrivilege	3492	wmic.exe
Token: SeManageVolumePrivilege	3492	wmic.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 3160 wrote to memory of 2896	3160	Umbral1.exe	85
PID 3160 wrote to memory of 2896	3160	Umbral1.exe	85
PID 3160 wrote to memory of 2292	3160	Umbral1.exe	89
PID 3160 wrote to memory of 2292	3160	Umbral1.exe	89
PID 3160 wrote to memory of 4580	3160	Umbral1.exe	91
PID 3160 wrote to memory of 4580	3160	Umbral1.exe	91
PID 3160 wrote to memory of 2500	3160	Umbral1.exe	93
PID 3160 wrote to memory of 2500	3160	Umbral1.exe	93
PID 3160 wrote to memory of 1264	3160	Umbral1.exe	95
PID 3160 wrote to memory of 1264	3160	Umbral1.exe	95
PID 3160 wrote to memory of 3492	3160	Umbral1.exe	97
PID 3160 wrote to memory of 3492	3160	Umbral1.exe	97
PID 3160 wrote to memory of 2228	3160	Umbral1.exe	99
PID 3160 wrote to memory of 2228	3160	Umbral1.exe	99
PID 3160 wrote to memory of 3728	3160	Umbral1.exe	101
PID 3160 wrote to memory of 3728	3160	Umbral1.exe	101
PID 3160 wrote to memory of 1768	3160	Umbral1.exe	103
PID 3160 wrote to memory of 1768	3160	Umbral1.exe	103
PID 3160 wrote to memory of 2036	3160	Umbral1.exe	105
PID 3160 wrote to memory of 2036	3160	Umbral1.exe	105

C:\Users\Admin\AppData\Local\Temp\Umbral1.exe
"C:\Users\Admin\AppData\Local\Temp\Umbral1.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3160
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2896
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Umbral1.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2292
- 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:4580
- 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:2500
- 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:1264
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3492
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2228
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3728
- 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:1768
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2036

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
5824a6037c081fda5d46de274b6e2799

SHA1
526367a09300cbde430e8fb44e41cbe7a0937aac

SHA256
4d610d9cd32a20279c7133a726ff61820d6930e5aa18253ee1422f3a6f54953f

SHA512
a109b150f730cda78d5bee106bd232f9dca7500dfb7899c6919de2bd542e345ca271aa11809a24ea0a27dca158067ab3a2d5688ac0a2325185143245f1665582

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

Filesize
1KB

MD5
548dd08570d121a65e82abb7171cae1c

SHA1
1a1b5084b3a78f3acd0d811cc79dbcac121217ab

SHA256
cdf17b8532ebcebac3cfe23954a30aa32edd268d040da79c82687e4ccb044adc

SHA512
37b98b09178b51eec9599af90d027d2f1028202efc1633047e16e41f1a95610984af5620baac07db085ccfcb96942aafffad17aa1f44f63233e83869dc9f697b

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

Filesize
1KB

MD5
45ad40f012b09e141955482368549640

SHA1
3f9cd15875c1e397c3b2b5592805577ae88a96cb

SHA256
ea3b59172f1a33677f9cb3843fb4d6093b806d3a7cf2f3c6d4692f5421f656ce

SHA512
3de08f8affca1c1450088f560776cf3d65146cadac43c06eb922c7b3cea436e519966cf38458303ffeb1a58c53f8952cffda6c34216fda7594e014b516e83b33

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vuher4rw.obw.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2292-13-0x00007FF8B9230000-0x00007FF8B9CF1000-memory.dmp

Filesize
10.8MB

Download
memory/2292-14-0x00007FF8B9230000-0x00007FF8B9CF1000-memory.dmp

Filesize
10.8MB

Download
memory/2292-15-0x00007FF8B9230000-0x00007FF8B9CF1000-memory.dmp

Filesize
10.8MB

Download
memory/2292-18-0x00007FF8B9230000-0x00007FF8B9CF1000-memory.dmp

Filesize
10.8MB

Download
memory/2292-8-0x000001B6C7900000-0x000001B6C7922000-memory.dmp

Filesize
136KB

Download
memory/3160-34-0x0000019585BD0000-0x0000019585C20000-memory.dmp

Filesize
320KB

Download
memory/3160-33-0x0000019585D90000-0x0000019585E06000-memory.dmp

Filesize
472KB

Download
memory/3160-35-0x0000019585BA0000-0x0000019585BBE000-memory.dmp

Filesize
120KB

Download
memory/3160-1-0x00007FF8B9233000-0x00007FF8B9235000-memory.dmp

Filesize
8KB

Download
memory/3160-0-0x0000019583E10000-0x0000019583E50000-memory.dmp

Filesize
256KB

Download
memory/3160-71-0x0000019585C20000-0x0000019585C2A000-memory.dmp

Filesize
40KB

Download
memory/3160-72-0x000001959E610000-0x000001959E622000-memory.dmp

Filesize
72KB

Download
memory/3160-2-0x00007FF8B9230000-0x00007FF8B9CF1000-memory.dmp

Filesize
10.8MB

Download
memory/3160-90-0x00007FF8B9230000-0x00007FF8B9CF1000-memory.dmp

Filesize
10.8MB

Download