umbral | 0ddc72fe91b271d21fbaafd017168c9b5370d362d7bd3e60928490ab4d1fac96

Analysis

max time kernel
90s
max time network
146s
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 17:39

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

Umbral (1).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/4308-0-0x000001C28B9B0000-0x000001C28B9F0000-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
5068	powershell.exe
968	powershell.exe
2572	powershell.exe
4776	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	Umbral (1).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
22	discord.com
23	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
3	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1420	wmic.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
4308	Umbral (1).exe
4776	powershell.exe
4776	powershell.exe
5068	powershell.exe
5068	powershell.exe
968	powershell.exe
968	powershell.exe
1376	powershell.exe
1376	powershell.exe
2572	powershell.exe
2572	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4308	Umbral (1).exe
Token: SeIncreaseQuotaPrivilege	5048	wmic.exe
Token: SeSecurityPrivilege	5048	wmic.exe
Token: SeTakeOwnershipPrivilege	5048	wmic.exe
Token: SeLoadDriverPrivilege	5048	wmic.exe
Token: SeSystemProfilePrivilege	5048	wmic.exe
Token: SeSystemtimePrivilege	5048	wmic.exe
Token: SeProfSingleProcessPrivilege	5048	wmic.exe
Token: SeIncBasePriorityPrivilege	5048	wmic.exe
Token: SeCreatePagefilePrivilege	5048	wmic.exe
Token: SeBackupPrivilege	5048	wmic.exe
Token: SeRestorePrivilege	5048	wmic.exe
Token: SeShutdownPrivilege	5048	wmic.exe
Token: SeDebugPrivilege	5048	wmic.exe
Token: SeSystemEnvironmentPrivilege	5048	wmic.exe
Token: SeRemoteShutdownPrivilege	5048	wmic.exe
Token: SeUndockPrivilege	5048	wmic.exe
Token: SeManageVolumePrivilege	5048	wmic.exe
Token: 33	5048	wmic.exe
Token: 34	5048	wmic.exe
Token: 35	5048	wmic.exe
Token: 36	5048	wmic.exe
Token: SeIncreaseQuotaPrivilege	5048	wmic.exe
Token: SeSecurityPrivilege	5048	wmic.exe
Token: SeTakeOwnershipPrivilege	5048	wmic.exe
Token: SeLoadDriverPrivilege	5048	wmic.exe
Token: SeSystemProfilePrivilege	5048	wmic.exe
Token: SeSystemtimePrivilege	5048	wmic.exe
Token: SeProfSingleProcessPrivilege	5048	wmic.exe
Token: SeIncBasePriorityPrivilege	5048	wmic.exe
Token: SeCreatePagefilePrivilege	5048	wmic.exe
Token: SeBackupPrivilege	5048	wmic.exe
Token: SeRestorePrivilege	5048	wmic.exe
Token: SeShutdownPrivilege	5048	wmic.exe
Token: SeDebugPrivilege	5048	wmic.exe
Token: SeSystemEnvironmentPrivilege	5048	wmic.exe
Token: SeRemoteShutdownPrivilege	5048	wmic.exe
Token: SeUndockPrivilege	5048	wmic.exe
Token: SeManageVolumePrivilege	5048	wmic.exe
Token: 33	5048	wmic.exe
Token: 34	5048	wmic.exe
Token: 35	5048	wmic.exe
Token: 36	5048	wmic.exe
Token: SeDebugPrivilege	4776	powershell.exe
Token: SeDebugPrivilege	5068	powershell.exe
Token: SeDebugPrivilege	968	powershell.exe
Token: SeDebugPrivilege	1376	powershell.exe
Token: SeIncreaseQuotaPrivilege	1148	wmic.exe
Token: SeSecurityPrivilege	1148	wmic.exe
Token: SeTakeOwnershipPrivilege	1148	wmic.exe
Token: SeLoadDriverPrivilege	1148	wmic.exe
Token: SeSystemProfilePrivilege	1148	wmic.exe
Token: SeSystemtimePrivilege	1148	wmic.exe
Token: SeProfSingleProcessPrivilege	1148	wmic.exe
Token: SeIncBasePriorityPrivilege	1148	wmic.exe
Token: SeCreatePagefilePrivilege	1148	wmic.exe
Token: SeBackupPrivilege	1148	wmic.exe
Token: SeRestorePrivilege	1148	wmic.exe
Token: SeShutdownPrivilege	1148	wmic.exe
Token: SeDebugPrivilege	1148	wmic.exe
Token: SeSystemEnvironmentPrivilege	1148	wmic.exe
Token: SeRemoteShutdownPrivilege	1148	wmic.exe
Token: SeUndockPrivilege	1148	wmic.exe
Token: SeManageVolumePrivilege	1148	wmic.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 4308 wrote to memory of 5048	4308	Umbral (1).exe	83
PID 4308 wrote to memory of 5048	4308	Umbral (1).exe	83
PID 4308 wrote to memory of 4776	4308	Umbral (1).exe	88
PID 4308 wrote to memory of 4776	4308	Umbral (1).exe	88
PID 4308 wrote to memory of 5068	4308	Umbral (1).exe	90
PID 4308 wrote to memory of 5068	4308	Umbral (1).exe	90
PID 4308 wrote to memory of 968	4308	Umbral (1).exe	92
PID 4308 wrote to memory of 968	4308	Umbral (1).exe	92
PID 4308 wrote to memory of 1376	4308	Umbral (1).exe	94
PID 4308 wrote to memory of 1376	4308	Umbral (1).exe	94
PID 4308 wrote to memory of 1148	4308	Umbral (1).exe	96
PID 4308 wrote to memory of 1148	4308	Umbral (1).exe	96
PID 4308 wrote to memory of 4748	4308	Umbral (1).exe	98
PID 4308 wrote to memory of 4748	4308	Umbral (1).exe	98
PID 4308 wrote to memory of 464	4308	Umbral (1).exe	100
PID 4308 wrote to memory of 464	4308	Umbral (1).exe	100
PID 4308 wrote to memory of 2572	4308	Umbral (1).exe	102
PID 4308 wrote to memory of 2572	4308	Umbral (1).exe	102
PID 4308 wrote to memory of 1420	4308	Umbral (1).exe	104
PID 4308 wrote to memory of 1420	4308	Umbral (1).exe	104

C:\Users\Admin\AppData\Local\Temp\Umbral (1).exe
"C:\Users\Admin\AppData\Local\Temp\Umbral (1).exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4308
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:5048
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Umbral (1).exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4776
- 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:5068
- 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:968
- 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:1376
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1148
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:4748
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:464
- 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:2572
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1420

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

Loading Replay Monitor...

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
1aefe566d0c19c9e3ddaf9ea005f71c0

SHA1
8d8cfb0d2192706100eb241f38a32b31f03329f1

SHA256
dc85b671f8ebac6cfa68897b1826019925c95a5ec36676fe18ba0085f437905a

SHA512
f22782b33f7990a0783154fbe6d49e03f16c873a3b4c91f1fc5ed76d0e7b88f0df876ccdf007828ba4d9a5f97cb2362f922cbacad03de5804bc8abeb36cb2d09

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
45ad40f012b09e141955482368549640

SHA1
3f9cd15875c1e397c3b2b5592805577ae88a96cb

SHA256
ea3b59172f1a33677f9cb3843fb4d6093b806d3a7cf2f3c6d4692f5421f656ce

SHA512
3de08f8affca1c1450088f560776cf3d65146cadac43c06eb922c7b3cea436e519966cf38458303ffeb1a58c53f8952cffda6c34216fda7594e014b516e83b33

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ghfsm0bv.zoj.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/968-60-0x0000015850D70000-0x0000015850F8C000-memory.dmp

Filesize
2.1MB

Download
memory/4308-0-0x000001C28B9B0000-0x000001C28B9F0000-memory.dmp

Filesize
256KB

Download
memory/4308-36-0x000001C28D620000-0x000001C28D63E000-memory.dmp

Filesize
120KB

Download
memory/4308-92-0x00007FFE6B870000-0x00007FFE6C331000-memory.dmp

Filesize
10.8MB

Download
memory/4308-2-0x00007FFE6B870000-0x00007FFE6C331000-memory.dmp

Filesize
10.8MB

Download
memory/4308-1-0x00007FFE6B873000-0x00007FFE6B875000-memory.dmp

Filesize
8KB

Download
memory/4308-34-0x000001C2A6140000-0x000001C2A61B6000-memory.dmp

Filesize
472KB

Download
memory/4308-35-0x000001C28D6A0000-0x000001C28D6F0000-memory.dmp

Filesize
320KB

Download
memory/4308-74-0x000001C28D6F0000-0x000001C28D702000-memory.dmp

Filesize
72KB

Download
memory/4308-73-0x000001C28D670000-0x000001C28D67A000-memory.dmp

Filesize
40KB

Download
memory/4776-15-0x00007FFE6B870000-0x00007FFE6C331000-memory.dmp

Filesize
10.8MB

Download
memory/4776-14-0x00007FFE6B870000-0x00007FFE6C331000-memory.dmp

Filesize
10.8MB

Download
memory/4776-3-0x00007FFE6B870000-0x00007FFE6C331000-memory.dmp

Filesize
10.8MB

Download
memory/4776-18-0x0000021FC9200000-0x0000021FC941C000-memory.dmp

Filesize
2.1MB

Download
memory/4776-9-0x0000021FB0BF0000-0x0000021FB0C12000-memory.dmp

Filesize
136KB

Download
memory/4776-19-0x00007FFE6B870000-0x00007FFE6C331000-memory.dmp

Filesize
10.8MB

Download