umbral | e73bb9abd07a3075baacff2be37bf9b32bc612de7e03af85ef4d51ff7b494e94

Analysis

max time kernel
120s
max time network
146s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
11-09-2024 20:28

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General

Target

Image Logger/Src/Files/upx.exe
Size

229KB
MD5

3191f1be1378fe37eb86efe885252351
SHA1

e242bc1a4a1b09dc0936a966153449a7afd227ff
SHA256

d5e77c60ebc90e48aa63369619fb8a048867aa1820c119371fb89d3b707324fc
SHA512

f2e9f3bbc4456034a0d233f0aca93de4fd5177e028d8f3208248457bc061574ac1a3615e565ca9d54cf41f68df6ac6f03b44c0dbaae0f56cc569440f67af204a
SSDEEP

6144:FloZM+rIkd8g+EtXHkv/iD4o+7Cw7ByallgRj++74T7b8e1mA9i:HoZtL+EP8V7Cw7ByallgRj++74DVU

Score

10^/10

umbral credential_access execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral3/memory/2212-1-0x0000000001110000-0x0000000001150000-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 3 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2752	powershell.exe
2344	powershell.exe
2720	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	upx.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

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
6	ip-api.com

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2212	upx.exe
2752	powershell.exe
2344	powershell.exe
2720	powershell.exe
1852	powershell.exe

Suspicious use of AdjustPrivilegeToken 45 IoCs

description	pid	Process
Token: SeDebugPrivilege	2212	upx.exe
Token: SeIncreaseQuotaPrivilege	2644	wmic.exe
Token: SeSecurityPrivilege	2644	wmic.exe
Token: SeTakeOwnershipPrivilege	2644	wmic.exe
Token: SeLoadDriverPrivilege	2644	wmic.exe
Token: SeSystemProfilePrivilege	2644	wmic.exe
Token: SeSystemtimePrivilege	2644	wmic.exe
Token: SeProfSingleProcessPrivilege	2644	wmic.exe
Token: SeIncBasePriorityPrivilege	2644	wmic.exe
Token: SeCreatePagefilePrivilege	2644	wmic.exe
Token: SeBackupPrivilege	2644	wmic.exe
Token: SeRestorePrivilege	2644	wmic.exe
Token: SeShutdownPrivilege	2644	wmic.exe
Token: SeDebugPrivilege	2644	wmic.exe
Token: SeSystemEnvironmentPrivilege	2644	wmic.exe
Token: SeRemoteShutdownPrivilege	2644	wmic.exe
Token: SeUndockPrivilege	2644	wmic.exe
Token: SeManageVolumePrivilege	2644	wmic.exe
Token: 33	2644	wmic.exe
Token: 34	2644	wmic.exe
Token: 35	2644	wmic.exe
Token: SeIncreaseQuotaPrivilege	2644	wmic.exe
Token: SeSecurityPrivilege	2644	wmic.exe
Token: SeTakeOwnershipPrivilege	2644	wmic.exe
Token: SeLoadDriverPrivilege	2644	wmic.exe
Token: SeSystemProfilePrivilege	2644	wmic.exe
Token: SeSystemtimePrivilege	2644	wmic.exe
Token: SeProfSingleProcessPrivilege	2644	wmic.exe
Token: SeIncBasePriorityPrivilege	2644	wmic.exe
Token: SeCreatePagefilePrivilege	2644	wmic.exe
Token: SeBackupPrivilege	2644	wmic.exe
Token: SeRestorePrivilege	2644	wmic.exe
Token: SeShutdownPrivilege	2644	wmic.exe
Token: SeDebugPrivilege	2644	wmic.exe
Token: SeSystemEnvironmentPrivilege	2644	wmic.exe
Token: SeRemoteShutdownPrivilege	2644	wmic.exe
Token: SeUndockPrivilege	2644	wmic.exe
Token: SeManageVolumePrivilege	2644	wmic.exe
Token: 33	2644	wmic.exe
Token: 34	2644	wmic.exe
Token: 35	2644	wmic.exe
Token: SeDebugPrivilege	2752	powershell.exe
Token: SeDebugPrivilege	2344	powershell.exe
Token: SeDebugPrivilege	2720	powershell.exe
Token: SeDebugPrivilege	1852	powershell.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2212 wrote to memory of 2644	2212	upx.exe	30
PID 2212 wrote to memory of 2644	2212	upx.exe	30
PID 2212 wrote to memory of 2644	2212	upx.exe	30
PID 2212 wrote to memory of 2456	2212	upx.exe	33
PID 2212 wrote to memory of 2456	2212	upx.exe	33
PID 2212 wrote to memory of 2456	2212	upx.exe	33
PID 2212 wrote to memory of 2752	2212	upx.exe	35
PID 2212 wrote to memory of 2752	2212	upx.exe	35
PID 2212 wrote to memory of 2752	2212	upx.exe	35
PID 2212 wrote to memory of 2344	2212	upx.exe	37
PID 2212 wrote to memory of 2344	2212	upx.exe	37
PID 2212 wrote to memory of 2344	2212	upx.exe	37
PID 2212 wrote to memory of 2720	2212	upx.exe	39
PID 2212 wrote to memory of 2720	2212	upx.exe	39
PID 2212 wrote to memory of 2720	2212	upx.exe	39
PID 2212 wrote to memory of 1852	2212	upx.exe	41
PID 2212 wrote to memory of 1852	2212	upx.exe	41
PID 2212 wrote to memory of 1852	2212	upx.exe	41
PID 2212 wrote to memory of 1684	2212	upx.exe	43
PID 2212 wrote to memory of 1684	2212	upx.exe	43
PID 2212 wrote to memory of 1684	2212	upx.exe	43

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2456	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Image Logger\Src\Files\upx.exe
"C:\Users\Admin\AppData\Local\Temp\Image Logger\Src\Files\upx.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2212
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2644
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Image Logger\Src\Files\upx.exe"
  2⤵
  - Views/modifies file attributes
  PID:2456
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Image Logger\Src\Files\upx.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2752
- 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:2344
- 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:2720
- 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:1852
- C:\Windows\system32\WerFault.exe
  C:\Windows\system32\WerFault.exe -u -p 2212 -s 1904
  2⤵
  PID:1684

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

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
c45a788123dc87e2665e95051000a7df

SHA1
2b3145a15fc213e6a14001e57dabd88eae6ebf4c

SHA256
0e4f9433c8b7b8a885e4aa5b29f99b51b7487a87fdac56179d17afd50b37adb1

SHA512
ed1363136d821bb19fbab541903b6fae399267d258df35c0f414e27c06410beacd64afd3549b4f063745900c5825fa97a90536db6d14dabb8d4163ed75cc58a2

Download Submit
memory/2212-0-0x000007FEF5643000-0x000007FEF5644000-memory.dmp

Filesize
4KB

Download
memory/2212-1-0x0000000001110000-0x0000000001150000-memory.dmp

Filesize
256KB

Download
memory/2212-2-0x000007FEF5640000-0x000007FEF602C000-memory.dmp

Filesize
9.9MB

Download
memory/2212-37-0x000007FEF5643000-0x000007FEF5644000-memory.dmp

Filesize
4KB

Download
memory/2212-38-0x000007FEF5640000-0x000007FEF602C000-memory.dmp

Filesize
9.9MB

Download
memory/2344-14-0x000000001B780000-0x000000001BA62000-memory.dmp

Filesize
2.9MB

Download
memory/2344-15-0x0000000001C80000-0x0000000001C88000-memory.dmp

Filesize
32KB

Download
memory/2752-7-0x000000001B660000-0x000000001B942000-memory.dmp

Filesize
2.9MB

Download
memory/2752-8-0x0000000002620000-0x0000000002628000-memory.dmp

Filesize
32KB

Download