umbral | bb4f17ec844fb9f40753d03c1a1ac29f239b7821295cef98180091b5de173f05

Analysis

max time kernel
30s
max time network
14s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
09/09/2024, 07:13

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General

Target

Umbral.exe
Size

232KB
MD5

9f44ee04168dfa82d6cf3e2d618bc7c5
SHA1

baed535b08c9b48ca13d6a63c0f2a3f5ba144746
SHA256

bb4f17ec844fb9f40753d03c1a1ac29f239b7821295cef98180091b5de173f05
SHA512

41d9bd4c0d6d968dbde2e037798a054c92539be7b4e9fa7eee638ea6a7e1eb7ffb76ad49dd8307139d302ad39104efadf438e2d45936abda944585a69e879bd7
SSDEEP

6144:BloZM+rIkd8g+EtXHkv/iD4Z1LCv8e1mpkni:zoZtL+EP8ZiVi

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/3752-1-0x000001775CC30000-0x000001775CC70000-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
1432	powershell.exe
2596	powershell.exe
532	powershell.exe
1136	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
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
5	ip-api.com

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
2328	cmd.exe
4532	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
3580	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4532	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
3752	Umbral.exe
1432	powershell.exe
1432	powershell.exe
2596	powershell.exe
2596	powershell.exe
532	powershell.exe
532	powershell.exe
2400	powershell.exe
2400	powershell.exe
1136	powershell.exe
1136	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3752	Umbral.exe
Token: SeIncreaseQuotaPrivilege	3952	wmic.exe
Token: SeSecurityPrivilege	3952	wmic.exe
Token: SeTakeOwnershipPrivilege	3952	wmic.exe
Token: SeLoadDriverPrivilege	3952	wmic.exe
Token: SeSystemProfilePrivilege	3952	wmic.exe
Token: SeSystemtimePrivilege	3952	wmic.exe
Token: SeProfSingleProcessPrivilege	3952	wmic.exe
Token: SeIncBasePriorityPrivilege	3952	wmic.exe
Token: SeCreatePagefilePrivilege	3952	wmic.exe
Token: SeBackupPrivilege	3952	wmic.exe
Token: SeRestorePrivilege	3952	wmic.exe
Token: SeShutdownPrivilege	3952	wmic.exe
Token: SeDebugPrivilege	3952	wmic.exe
Token: SeSystemEnvironmentPrivilege	3952	wmic.exe
Token: SeRemoteShutdownPrivilege	3952	wmic.exe
Token: SeUndockPrivilege	3952	wmic.exe
Token: SeManageVolumePrivilege	3952	wmic.exe
Token: 33	3952	wmic.exe
Token: 34	3952	wmic.exe
Token: 35	3952	wmic.exe
Token: 36	3952	wmic.exe
Token: SeIncreaseQuotaPrivilege	3952	wmic.exe
Token: SeSecurityPrivilege	3952	wmic.exe
Token: SeTakeOwnershipPrivilege	3952	wmic.exe
Token: SeLoadDriverPrivilege	3952	wmic.exe
Token: SeSystemProfilePrivilege	3952	wmic.exe
Token: SeSystemtimePrivilege	3952	wmic.exe
Token: SeProfSingleProcessPrivilege	3952	wmic.exe
Token: SeIncBasePriorityPrivilege	3952	wmic.exe
Token: SeCreatePagefilePrivilege	3952	wmic.exe
Token: SeBackupPrivilege	3952	wmic.exe
Token: SeRestorePrivilege	3952	wmic.exe
Token: SeShutdownPrivilege	3952	wmic.exe
Token: SeDebugPrivilege	3952	wmic.exe
Token: SeSystemEnvironmentPrivilege	3952	wmic.exe
Token: SeRemoteShutdownPrivilege	3952	wmic.exe
Token: SeUndockPrivilege	3952	wmic.exe
Token: SeManageVolumePrivilege	3952	wmic.exe
Token: 33	3952	wmic.exe
Token: 34	3952	wmic.exe
Token: 35	3952	wmic.exe
Token: 36	3952	wmic.exe
Token: SeDebugPrivilege	1432	powershell.exe
Token: SeDebugPrivilege	2596	powershell.exe
Token: SeDebugPrivilege	532	powershell.exe
Token: SeDebugPrivilege	2400	powershell.exe
Token: SeIncreaseQuotaPrivilege	2132	wmic.exe
Token: SeSecurityPrivilege	2132	wmic.exe
Token: SeTakeOwnershipPrivilege	2132	wmic.exe
Token: SeLoadDriverPrivilege	2132	wmic.exe
Token: SeSystemProfilePrivilege	2132	wmic.exe
Token: SeSystemtimePrivilege	2132	wmic.exe
Token: SeProfSingleProcessPrivilege	2132	wmic.exe
Token: SeIncBasePriorityPrivilege	2132	wmic.exe
Token: SeCreatePagefilePrivilege	2132	wmic.exe
Token: SeBackupPrivilege	2132	wmic.exe
Token: SeRestorePrivilege	2132	wmic.exe
Token: SeShutdownPrivilege	2132	wmic.exe
Token: SeDebugPrivilege	2132	wmic.exe
Token: SeSystemEnvironmentPrivilege	2132	wmic.exe
Token: SeRemoteShutdownPrivilege	2132	wmic.exe
Token: SeUndockPrivilege	2132	wmic.exe
Token: SeManageVolumePrivilege	2132	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3752 wrote to memory of 3952	3752	Umbral.exe	84
PID 3752 wrote to memory of 3952	3752	Umbral.exe	84
PID 3752 wrote to memory of 1812	3752	Umbral.exe	89
PID 3752 wrote to memory of 1812	3752	Umbral.exe	89
PID 3752 wrote to memory of 1432	3752	Umbral.exe	91
PID 3752 wrote to memory of 1432	3752	Umbral.exe	91
PID 3752 wrote to memory of 2596	3752	Umbral.exe	94
PID 3752 wrote to memory of 2596	3752	Umbral.exe	94
PID 3752 wrote to memory of 532	3752	Umbral.exe	96
PID 3752 wrote to memory of 532	3752	Umbral.exe	96
PID 3752 wrote to memory of 2400	3752	Umbral.exe	98
PID 3752 wrote to memory of 2400	3752	Umbral.exe	98
PID 3752 wrote to memory of 2132	3752	Umbral.exe	100
PID 3752 wrote to memory of 2132	3752	Umbral.exe	100
PID 3752 wrote to memory of 4192	3752	Umbral.exe	104
PID 3752 wrote to memory of 4192	3752	Umbral.exe	104
PID 3752 wrote to memory of 2680	3752	Umbral.exe	106
PID 3752 wrote to memory of 2680	3752	Umbral.exe	106
PID 3752 wrote to memory of 1136	3752	Umbral.exe	108
PID 3752 wrote to memory of 1136	3752	Umbral.exe	108
PID 3752 wrote to memory of 3580	3752	Umbral.exe	110
PID 3752 wrote to memory of 3580	3752	Umbral.exe	110
PID 3752 wrote to memory of 2328	3752	Umbral.exe	113
PID 3752 wrote to memory of 2328	3752	Umbral.exe	113
PID 2328 wrote to memory of 4532	2328	cmd.exe	115
PID 2328 wrote to memory of 4532	2328	cmd.exe	115

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
1812	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Umbral.exe
"C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3752
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3952
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:1812
- 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:1432
- 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:2596
- 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:532
- 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:2400
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2132
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:4192
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2680
- 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:1136
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:3580
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Umbral.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2328
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:4532

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

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

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
966914e2e771de7a4a57a95b6ecfa8a9

SHA1
7a32282fd51dd032967ed4d9a40cc57e265aeff2

SHA256
98d3c70d7004fa807897317bd6cd3e977b9b6c72d4d2565aca0f9f8b1c315cba

SHA512
dc39c7124a9c7c8d4c7e8e16290c46360b8d9a8f4e43edaacbbeb09bdcf20159a53db54d2b322372001b6a3de52b2f88e9088b5fdbc7638816ae0d122bb015f5

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
eeb6ad386d143f278077171fc01a81e8

SHA1
43cff1bd7240965bfb2f10e47c0cec0f94332e2d

SHA256
59d62f9472b4c00b7cae0ee702789fa2b0042c468e4de9421d2430f9973eb00d

SHA512
b40f003e6d97adaaf05809f06d12df01984943d9eb6c44eaeffef90df8de0040373150c9714b11a42db5189b7064eeed0609a39f6f1feb91b05dd1835333e8f2

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_drw1la0x.zei.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1432-4-0x00007FFC9A040000-0x00007FFC9AB01000-memory.dmp

Filesize
10.8MB

Download
memory/1432-5-0x00007FFC9A040000-0x00007FFC9AB01000-memory.dmp

Filesize
10.8MB

Download
memory/1432-12-0x00000216F63B0000-0x00000216F63D2000-memory.dmp

Filesize
136KB

Download
memory/1432-18-0x00007FFC9A040000-0x00007FFC9AB01000-memory.dmp

Filesize
10.8MB

Download
memory/1432-3-0x00007FFC9A040000-0x00007FFC9AB01000-memory.dmp

Filesize
10.8MB

Download
memory/3752-34-0x0000017777310000-0x0000017777360000-memory.dmp

Filesize
320KB

Download
memory/3752-33-0x0000017777360000-0x00000177773D6000-memory.dmp

Filesize
472KB

Download
memory/3752-35-0x00000177772C0000-0x00000177772DE000-memory.dmp

Filesize
120KB

Download
memory/3752-1-0x000001775CC30000-0x000001775CC70000-memory.dmp

Filesize
256KB

Download
memory/3752-0-0x00007FFC9A043000-0x00007FFC9A045000-memory.dmp

Filesize
8KB

Download
memory/3752-71-0x00000177774F0000-0x00000177774FA000-memory.dmp

Filesize
40KB

Download
memory/3752-72-0x0000017777520000-0x0000017777532000-memory.dmp

Filesize
72KB

Download
memory/3752-2-0x00007FFC9A040000-0x00007FFC9AB01000-memory.dmp

Filesize
10.8MB

Download
memory/3752-90-0x00007FFC9A040000-0x00007FFC9AB01000-memory.dmp

Filesize
10.8MB

Download