umbral | ac9fb718a06f5ea046a5ce765f84c202c08c45814bcd10c9e74de3dfc8301878

Analysis

max time kernel
149s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
11-01-2024 14:11

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

NostalgiaPaste.exe
Size

614KB
MD5

863ccaa8f5615fd603e3df9e08d433c6
SHA1

58e5ac27b4c8ce04b705fbd4fc267c7c96ae8438
SHA256

b502a581b8b5f291508791631fbd40853edc952572eaa214086f6a91694a284a
SHA512

715dccca665ffc88da761fc2ae0a9a01a477c3546b86fc0922ca033b4826f44b42c2c718b1adec2c26e9736e3e81c144ef5f5161706daa3acbabe8b0f952a906
SSDEEP

12288:3l/5a8Yv+Gk+IRvmf8lDATKwRP7NaaWSxpumTFzoLIOnrDjfBlfrkfVNaw9mmrz6:3P9rGbIRuf8lkRP7NaLGNoLbjfBl4NN7

Score

10^/10

umbral spyware stealer

Malware Config

Signatures

Detect Umbral payload 2 IoCs

resource	yara_rule
behavioral6/memory/4212-8-0x0000000007620000-0x000000000765E000-memory.dmp	family_umbral
behavioral6/memory/4592-21-0x0000028E8C800000-0x0000028E8C840000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation	NostalgiaPaste.exe

Executes dropped EXE 1 IoCs

pid	Process
4592	nostalgia_authentication.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

Web Service
T1102

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
22	ip-api.com

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
932	wmic.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
2420	powershell.exe
2420	powershell.exe
2420	powershell.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
2492	Conhost.exe
2492	Conhost.exe
2492	Conhost.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4124	powershell.exe
4124	powershell.exe
4212	NostalgiaPaste.exe
4124	powershell.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
3060	powershell.exe
3060	powershell.exe
3060	powershell.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4212	NostalgiaPaste.exe
4732	powershell.exe
4732	powershell.exe
4732	powershell.exe
4212	NostalgiaPaste.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4212	NostalgiaPaste.exe
Token: SeDebugPrivilege	4592	nostalgia_authentication.exe
Token: SeDebugPrivilege	2420	powershell.exe
Token: SeDebugPrivilege	2492	Conhost.exe
Token: SeDebugPrivilege	4124	powershell.exe
Token: SeDebugPrivilege	3060	powershell.exe
Token: SeIncreaseQuotaPrivilege	2020	wmic.exe
Token: SeSecurityPrivilege	2020	wmic.exe
Token: SeTakeOwnershipPrivilege	2020	wmic.exe
Token: SeLoadDriverPrivilege	2020	wmic.exe
Token: SeSystemProfilePrivilege	2020	wmic.exe
Token: SeSystemtimePrivilege	2020	wmic.exe
Token: SeProfSingleProcessPrivilege	2020	wmic.exe
Token: SeIncBasePriorityPrivilege	2020	wmic.exe
Token: SeCreatePagefilePrivilege	2020	wmic.exe
Token: SeBackupPrivilege	2020	wmic.exe
Token: SeRestorePrivilege	2020	wmic.exe
Token: SeShutdownPrivilege	2020	wmic.exe
Token: SeDebugPrivilege	2020	wmic.exe
Token: SeSystemEnvironmentPrivilege	2020	wmic.exe
Token: SeRemoteShutdownPrivilege	2020	wmic.exe
Token: SeUndockPrivilege	2020	wmic.exe
Token: SeManageVolumePrivilege	2020	wmic.exe
Token: 33	2020	wmic.exe
Token: 34	2020	wmic.exe
Token: 35	2020	wmic.exe
Token: 36	2020	wmic.exe
Token: SeIncreaseQuotaPrivilege	2020	wmic.exe
Token: SeSecurityPrivilege	2020	wmic.exe
Token: SeTakeOwnershipPrivilege	2020	wmic.exe
Token: SeLoadDriverPrivilege	2020	wmic.exe
Token: SeSystemProfilePrivilege	2020	wmic.exe
Token: SeSystemtimePrivilege	2020	wmic.exe
Token: SeProfSingleProcessPrivilege	2020	wmic.exe
Token: SeIncBasePriorityPrivilege	2020	wmic.exe
Token: SeCreatePagefilePrivilege	2020	wmic.exe
Token: SeBackupPrivilege	2020	wmic.exe
Token: SeRestorePrivilege	2020	wmic.exe
Token: SeShutdownPrivilege	2020	wmic.exe
Token: SeDebugPrivilege	2020	wmic.exe
Token: SeSystemEnvironmentPrivilege	2020	wmic.exe
Token: SeRemoteShutdownPrivilege	2020	wmic.exe
Token: SeUndockPrivilege	2020	wmic.exe
Token: SeManageVolumePrivilege	2020	wmic.exe
Token: 33	2020	wmic.exe
Token: 34	2020	wmic.exe
Token: 35	2020	wmic.exe
Token: 36	2020	wmic.exe
Token: SeIncreaseQuotaPrivilege	2712	wmic.exe
Token: SeSecurityPrivilege	2712	wmic.exe
Token: SeTakeOwnershipPrivilege	2712	wmic.exe
Token: SeLoadDriverPrivilege	2712	wmic.exe
Token: SeSystemProfilePrivilege	2712	wmic.exe
Token: SeSystemtimePrivilege	2712	wmic.exe
Token: SeProfSingleProcessPrivilege	2712	wmic.exe
Token: SeIncBasePriorityPrivilege	2712	wmic.exe
Token: SeCreatePagefilePrivilege	2712	wmic.exe
Token: SeBackupPrivilege	2712	wmic.exe
Token: SeRestorePrivilege	2712	wmic.exe
Token: SeShutdownPrivilege	2712	wmic.exe
Token: SeDebugPrivilege	2712	wmic.exe
Token: SeSystemEnvironmentPrivilege	2712	wmic.exe
Token: SeRemoteShutdownPrivilege	2712	wmic.exe
Token: SeUndockPrivilege	2712	wmic.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 4212 wrote to memory of 4592	4212	NostalgiaPaste.exe	41
PID 4212 wrote to memory of 4592	4212	NostalgiaPaste.exe	41
PID 4592 wrote to memory of 2420	4592	nostalgia_authentication.exe	53
PID 4592 wrote to memory of 2420	4592	nostalgia_authentication.exe	53
PID 4592 wrote to memory of 2492	4592	nostalgia_authentication.exe	108
PID 4592 wrote to memory of 2492	4592	nostalgia_authentication.exe	108
PID 4592 wrote to memory of 4124	4592	nostalgia_authentication.exe	60
PID 4592 wrote to memory of 4124	4592	nostalgia_authentication.exe	60
PID 4592 wrote to memory of 3060	4592	nostalgia_authentication.exe	59
PID 4592 wrote to memory of 3060	4592	nostalgia_authentication.exe	59
PID 4592 wrote to memory of 2020	4592	nostalgia_authentication.exe	114
PID 4592 wrote to memory of 2020	4592	nostalgia_authentication.exe	114
PID 4592 wrote to memory of 2712	4592	nostalgia_authentication.exe	113
PID 4592 wrote to memory of 2712	4592	nostalgia_authentication.exe	113
PID 4592 wrote to memory of 1700	4592	nostalgia_authentication.exe	112
PID 4592 wrote to memory of 1700	4592	nostalgia_authentication.exe	112
PID 4592 wrote to memory of 4732	4592	nostalgia_authentication.exe	107
PID 4592 wrote to memory of 4732	4592	nostalgia_authentication.exe	107
PID 4592 wrote to memory of 932	4592	nostalgia_authentication.exe	109
PID 4592 wrote to memory of 932	4592	nostalgia_authentication.exe	109

C:\Users\Admin\AppData\Local\Temp\NostalgiaPaste.exe
"C:\Users\Admin\AppData\Local\Temp\NostalgiaPaste.exe"
1⤵
- Checks computer location settings
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4212
- C:\Users\Admin\AppData\Local\Temp\nostalgia_authentication.exe
  "C:\Users\Admin\AppData\Local\Temp\nostalgia_authentication.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4592
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\nostalgia_authentication.exe'
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2420
- - 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
    3⤵
    PID:2492
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3060
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4124
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:4732
  - - C:\Windows\System32\Conhost.exe
      \??\C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2492
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic" path win32_VideoController get name
    3⤵
    - Detects videocard installed
    PID:932
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    PID:1700
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" computersystem get totalphysicalmemory
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:2712
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" os get Caption
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:2020

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

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

memory/2420-33-0x000002DCEBFB0000-0x000002DCEBFD2000-memory.dmp

Filesize
136KB

Download
memory/2420-39-0x00007FFF93C80000-0x00007FFF94741000-memory.dmp

Filesize
10.8MB

Download
memory/2420-34-0x00007FFF93C80000-0x00007FFF94741000-memory.dmp

Filesize
10.8MB

Download
memory/2420-35-0x000002DCEB7E0000-0x000002DCEB7F0000-memory.dmp

Filesize
64KB

Download
memory/2420-36-0x000002DCEB7E0000-0x000002DCEB7F0000-memory.dmp

Filesize
64KB

Download
memory/2492-55-0x00007FFF93C80000-0x00007FFF94741000-memory.dmp

Filesize
10.8MB

Download
memory/2492-53-0x000001616A290000-0x000001616A2A0000-memory.dmp

Filesize
64KB

Download
memory/2492-52-0x000001616A290000-0x000001616A2A0000-memory.dmp

Filesize
64KB

Download
memory/2492-51-0x00007FFF93C80000-0x00007FFF94741000-memory.dmp

Filesize
10.8MB

Download
memory/3060-104-0x00007FFF93C80000-0x00007FFF94741000-memory.dmp

Filesize
10.8MB

Download
memory/3060-101-0x0000020D59C20000-0x0000020D59C30000-memory.dmp

Filesize
64KB

Download
memory/3060-100-0x00007FFF93C80000-0x00007FFF94741000-memory.dmp

Filesize
10.8MB

Download
memory/4124-61-0x00000218F2020000-0x00000218F2030000-memory.dmp

Filesize
64KB

Download
memory/4124-62-0x00000218F2020000-0x00000218F2030000-memory.dmp

Filesize
64KB

Download
memory/4124-60-0x00007FFF93C80000-0x00007FFF94741000-memory.dmp

Filesize
10.8MB

Download
memory/4124-88-0x00007FFF93C80000-0x00007FFF94741000-memory.dmp

Filesize
10.8MB

Download
memory/4212-20-0x0000000005730000-0x0000000005740000-memory.dmp

Filesize
64KB

Download
memory/4212-4-0x0000000005EF0000-0x0000000006494000-memory.dmp

Filesize
5.6MB

Download
memory/4212-1-0x0000000000980000-0x0000000000AD0000-memory.dmp

Filesize
1.3MB

Download
memory/4212-0-0x00000000746A0000-0x0000000074E50000-memory.dmp

Filesize
7.7MB

Download
memory/4212-3-0x0000000005730000-0x0000000005740000-memory.dmp

Filesize
64KB

Download
memory/4212-2-0x0000000002F20000-0x0000000002F21000-memory.dmp

Filesize
4KB

Download
memory/4212-59-0x00000000746A0000-0x0000000074E50000-memory.dmp

Filesize
7.7MB

Download
memory/4212-5-0x0000000005940000-0x00000000059D2000-memory.dmp

Filesize
584KB

Download
memory/4212-8-0x0000000007620000-0x000000000765E000-memory.dmp

Filesize
248KB

Download
memory/4212-7-0x0000000005700000-0x000000000570A000-memory.dmp

Filesize
40KB

Download
memory/4212-6-0x0000000005510000-0x000000000552C000-memory.dmp

Filesize
112KB

Download
memory/4212-86-0x0000000005730000-0x0000000005740000-memory.dmp

Filesize
64KB

Download
memory/4212-89-0x0000000005730000-0x0000000005740000-memory.dmp

Filesize
64KB

Download
memory/4592-21-0x0000028E8C800000-0x0000028E8C840000-memory.dmp

Filesize
256KB

Download
memory/4592-85-0x00007FFF93C80000-0x00007FFF94741000-memory.dmp

Filesize
10.8MB

Download
memory/4592-58-0x0000028EA6EB0000-0x0000028EA6ECE000-memory.dmp

Filesize
120KB

Download
memory/4592-22-0x00007FFF93C80000-0x00007FFF94741000-memory.dmp

Filesize
10.8MB

Download
memory/4592-107-0x0000028EA7100000-0x0000028EA7112000-memory.dmp

Filesize
72KB

Download
memory/4592-106-0x0000028EA6EF0000-0x0000028EA6EFA000-memory.dmp

Filesize
40KB

Download
memory/4592-56-0x0000028EA6F30000-0x0000028EA6FA6000-memory.dmp

Filesize
472KB

Download
memory/4592-102-0x0000028EA6DA0000-0x0000028EA6DB0000-memory.dmp

Filesize
64KB

Download
memory/4592-57-0x0000028EA6FB0000-0x0000028EA7000000-memory.dmp

Filesize
320KB

Download
memory/4592-23-0x0000028EA6DA0000-0x0000028EA6DB0000-memory.dmp

Filesize
64KB

Download
memory/4592-128-0x00007FFF93C80000-0x00007FFF94741000-memory.dmp

Filesize
10.8MB

Download
memory/4732-121-0x000002067CA80000-0x000002067CA90000-memory.dmp

Filesize
64KB

Download
memory/4732-123-0x00007FFF93C80000-0x00007FFF94741000-memory.dmp

Filesize
10.8MB

Download
memory/4732-120-0x00007FFF93C80000-0x00007FFF94741000-memory.dmp

Filesize
10.8MB

Download