umbral | ac9fb718a06f5ea046a5ce765f84c202c08c45814bcd10c9e74de3dfc8301878

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
11-01-2024 14:10

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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 3 IoCs

resource	yara_rule
behavioral4/memory/2820-9-0x00000000075A0000-0x00000000075DE000-memory.dmp	family_umbral
behavioral4/files/0x000c000000023223-14.dat	family_umbral
behavioral4/memory/3496-21-0x00000247508D0000-0x0000024750910000-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-1-5-21-1232405761-1209240240-3206092754-1000\Control Panel\International\Geo\Nation	NostalgiaPaste.exe

Executes dropped EXE 1 IoCs

pid	Process
3496	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
42	ip-api.com

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2820	NostalgiaPaste.exe
2820	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
3976	wmic.exe

Suspicious behavior: EnumeratesProcesses 60 IoCs

pid	Process
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2820	NostalgiaPaste.exe
2200	powershell.exe
2200	powershell.exe
2200	powershell.exe
2096	powershell.exe
2096	powershell.exe
2096	powershell.exe
1608	powershell.exe
1608	powershell.exe
1608	powershell.exe
4452	powershell.exe
4452	powershell.exe
4452	powershell.exe
4004	powershell.exe
4004	powershell.exe
4004	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2820	NostalgiaPaste.exe
Token: SeDebugPrivilege	3496	nostalgia_authentication.exe
Token: SeDebugPrivilege	2200	powershell.exe
Token: SeDebugPrivilege	2096	powershell.exe
Token: SeDebugPrivilege	1608	powershell.exe
Token: SeDebugPrivilege	4452	powershell.exe
Token: SeIncreaseQuotaPrivilege	4368	wmic.exe
Token: SeSecurityPrivilege	4368	wmic.exe
Token: SeTakeOwnershipPrivilege	4368	wmic.exe
Token: SeLoadDriverPrivilege	4368	wmic.exe
Token: SeSystemProfilePrivilege	4368	wmic.exe
Token: SeSystemtimePrivilege	4368	wmic.exe
Token: SeProfSingleProcessPrivilege	4368	wmic.exe
Token: SeIncBasePriorityPrivilege	4368	wmic.exe
Token: SeCreatePagefilePrivilege	4368	wmic.exe
Token: SeBackupPrivilege	4368	wmic.exe
Token: SeRestorePrivilege	4368	wmic.exe
Token: SeShutdownPrivilege	4368	wmic.exe
Token: SeDebugPrivilege	4368	wmic.exe
Token: SeSystemEnvironmentPrivilege	4368	wmic.exe
Token: SeRemoteShutdownPrivilege	4368	wmic.exe
Token: SeUndockPrivilege	4368	wmic.exe
Token: SeManageVolumePrivilege	4368	wmic.exe
Token: 33	4368	wmic.exe
Token: 34	4368	wmic.exe
Token: 35	4368	wmic.exe
Token: 36	4368	wmic.exe
Token: SeIncreaseQuotaPrivilege	4368	wmic.exe
Token: SeSecurityPrivilege	4368	wmic.exe
Token: SeTakeOwnershipPrivilege	4368	wmic.exe
Token: SeLoadDriverPrivilege	4368	wmic.exe
Token: SeSystemProfilePrivilege	4368	wmic.exe
Token: SeSystemtimePrivilege	4368	wmic.exe
Token: SeProfSingleProcessPrivilege	4368	wmic.exe
Token: SeIncBasePriorityPrivilege	4368	wmic.exe
Token: SeCreatePagefilePrivilege	4368	wmic.exe
Token: SeBackupPrivilege	4368	wmic.exe
Token: SeRestorePrivilege	4368	wmic.exe
Token: SeShutdownPrivilege	4368	wmic.exe
Token: SeDebugPrivilege	4368	wmic.exe
Token: SeSystemEnvironmentPrivilege	4368	wmic.exe
Token: SeRemoteShutdownPrivilege	4368	wmic.exe
Token: SeUndockPrivilege	4368	wmic.exe
Token: SeManageVolumePrivilege	4368	wmic.exe
Token: 33	4368	wmic.exe
Token: 34	4368	wmic.exe
Token: 35	4368	wmic.exe
Token: 36	4368	wmic.exe
Token: SeIncreaseQuotaPrivilege	1568	wmic.exe
Token: SeSecurityPrivilege	1568	wmic.exe
Token: SeTakeOwnershipPrivilege	1568	wmic.exe
Token: SeLoadDriverPrivilege	1568	wmic.exe
Token: SeSystemProfilePrivilege	1568	wmic.exe
Token: SeSystemtimePrivilege	1568	wmic.exe
Token: SeProfSingleProcessPrivilege	1568	wmic.exe
Token: SeIncBasePriorityPrivilege	1568	wmic.exe
Token: SeCreatePagefilePrivilege	1568	wmic.exe
Token: SeBackupPrivilege	1568	wmic.exe
Token: SeRestorePrivilege	1568	wmic.exe
Token: SeShutdownPrivilege	1568	wmic.exe
Token: SeDebugPrivilege	1568	wmic.exe
Token: SeSystemEnvironmentPrivilege	1568	wmic.exe
Token: SeRemoteShutdownPrivilege	1568	wmic.exe
Token: SeUndockPrivilege	1568	wmic.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2820 wrote to memory of 3496	2820	NostalgiaPaste.exe	92
PID 2820 wrote to memory of 3496	2820	NostalgiaPaste.exe	92
PID 3496 wrote to memory of 2200	3496	nostalgia_authentication.exe	96
PID 3496 wrote to memory of 2200	3496	nostalgia_authentication.exe	96
PID 3496 wrote to memory of 2096	3496	nostalgia_authentication.exe	105
PID 3496 wrote to memory of 2096	3496	nostalgia_authentication.exe	105
PID 3496 wrote to memory of 1608	3496	nostalgia_authentication.exe	102
PID 3496 wrote to memory of 1608	3496	nostalgia_authentication.exe	102
PID 3496 wrote to memory of 4452	3496	nostalgia_authentication.exe	104
PID 3496 wrote to memory of 4452	3496	nostalgia_authentication.exe	104
PID 3496 wrote to memory of 4368	3496	nostalgia_authentication.exe	107
PID 3496 wrote to memory of 4368	3496	nostalgia_authentication.exe	107
PID 3496 wrote to memory of 1568	3496	nostalgia_authentication.exe	116
PID 3496 wrote to memory of 1568	3496	nostalgia_authentication.exe	116
PID 3496 wrote to memory of 1656	3496	nostalgia_authentication.exe	115
PID 3496 wrote to memory of 1656	3496	nostalgia_authentication.exe	115
PID 3496 wrote to memory of 4004	3496	nostalgia_authentication.exe	111
PID 3496 wrote to memory of 4004	3496	nostalgia_authentication.exe	111
PID 3496 wrote to memory of 3976	3496	nostalgia_authentication.exe	113
PID 3496 wrote to memory of 3976	3496	nostalgia_authentication.exe	113

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:2820
- 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:3496
- - 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:2200
- - 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:1608
- - 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:4452
- - 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⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2096
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" os get Caption
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:4368
- - 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:4004
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic" path win32_VideoController get name
    3⤵
    - Detects videocard installed
    PID:3976
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    PID:1656
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" computersystem get totalphysicalmemory
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:1568

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

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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
62623d22bd9e037191765d5083ce16a3

SHA1
4a07da6872672f715a4780513d95ed8ddeefd259

SHA256
95d79fd575bbd21540e378fcbc1cd00d16f51af62ce15bae7080bb72c24e2010

SHA512
9a448b7a0d867466c2ea04ab84d2a9485d5fd20ab53b2b854f491831ee3f1d781b94d2635f7b0b35cb9f2d373cd52c67570879a56a42ed66bc9db06962ed4992

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vyojk5dt.bwj.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\nostalgia_authentication.exe

Filesize
229KB

MD5
9807cd8bd9f25a62782f5ef42ef82432

SHA1
942ca4582b457f0f3768e02a3422e2646ec774e7

SHA256
9072ab80200c13dd896e67257dd9fa4f8795bbca69513d1529fa782c54ffb13d

SHA512
dd51a1d295778593c40ef27d8319ef04a0b02ee0b7a68c599aea83846d17d1db1f445ec63890639d3e9da649aac7613aa296f3e50be0a41c28683136e59ba1c3

Download Submit
memory/1608-62-0x000001B2C8C60000-0x000001B2C8C70000-memory.dmp

Filesize
64KB

Download
memory/1608-61-0x00007FF8F4C40000-0x00007FF8F5701000-memory.dmp

Filesize
10.8MB

Download
memory/1608-87-0x00007FF8F4C40000-0x00007FF8F5701000-memory.dmp

Filesize
10.8MB

Download
memory/1608-63-0x000001B2C8C60000-0x000001B2C8C70000-memory.dmp

Filesize
64KB

Download
memory/2096-52-0x00007FF8F4C40000-0x00007FF8F5701000-memory.dmp

Filesize
10.8MB

Download
memory/2096-53-0x000001FF21350000-0x000001FF21360000-memory.dmp

Filesize
64KB

Download
memory/2096-57-0x00007FF8F4C40000-0x00007FF8F5701000-memory.dmp

Filesize
10.8MB

Download
memory/2096-54-0x000001FF21350000-0x000001FF21360000-memory.dmp

Filesize
64KB

Download
memory/2200-37-0x000001988CF00000-0x000001988CF10000-memory.dmp

Filesize
64KB

Download
memory/2200-38-0x000001988CF00000-0x000001988CF10000-memory.dmp

Filesize
64KB

Download
memory/2200-36-0x00007FF8F4C40000-0x00007FF8F5701000-memory.dmp

Filesize
10.8MB

Download
memory/2200-31-0x00000198A55D0000-0x00000198A55F2000-memory.dmp

Filesize
136KB

Download
memory/2200-41-0x00007FF8F4C40000-0x00007FF8F5701000-memory.dmp

Filesize
10.8MB

Download
memory/2820-7-0x00000000062A0000-0x00000000062AA000-memory.dmp

Filesize
40KB

Download
memory/2820-9-0x00000000075A0000-0x00000000075DE000-memory.dmp

Filesize
248KB

Download
memory/2820-23-0x00000000750B0000-0x0000000075860000-memory.dmp

Filesize
7.7MB

Download
memory/2820-4-0x00000000064A0000-0x0000000006A44000-memory.dmp

Filesize
5.6MB

Download
memory/2820-5-0x0000000005FD0000-0x0000000006062000-memory.dmp

Filesize
584KB

Download
memory/2820-6-0x0000000005F50000-0x0000000005F6C000-memory.dmp

Filesize
112KB

Download
memory/2820-1-0x00000000750B0000-0x0000000075860000-memory.dmp

Filesize
7.7MB

Download
memory/2820-8-0x0000000003600000-0x0000000003610000-memory.dmp

Filesize
64KB

Download
memory/2820-2-0x0000000003430000-0x0000000003431000-memory.dmp

Filesize
4KB

Download
memory/2820-3-0x0000000003600000-0x0000000003610000-memory.dmp

Filesize
64KB

Download
memory/2820-0-0x0000000000F90000-0x00000000010E0000-memory.dmp

Filesize
1.3MB

Download
memory/3496-21-0x00000247508D0000-0x0000024750910000-memory.dmp

Filesize
256KB

Download
memory/3496-104-0x0000024750E20000-0x0000024750E2A000-memory.dmp

Filesize
40KB

Download
memory/3496-58-0x00000247527A0000-0x0000024752816000-memory.dmp

Filesize
472KB

Download
memory/3496-59-0x0000024750DD0000-0x0000024750E20000-memory.dmp

Filesize
320KB

Download
memory/3496-25-0x000002476B080000-0x000002476B090000-memory.dmp

Filesize
64KB

Download
memory/3496-129-0x00007FF8F4C40000-0x00007FF8F5701000-memory.dmp

Filesize
10.8MB

Download
memory/3496-125-0x000002476B080000-0x000002476B090000-memory.dmp

Filesize
64KB

Download
memory/3496-60-0x0000024750DA0000-0x0000024750DBE000-memory.dmp

Filesize
120KB

Download
memory/3496-118-0x00007FF8F4C40000-0x00007FF8F5701000-memory.dmp

Filesize
10.8MB

Download
memory/3496-24-0x00007FF8F4C40000-0x00007FF8F5701000-memory.dmp

Filesize
10.8MB

Download
memory/3496-105-0x0000024750E50000-0x0000024750E62000-memory.dmp

Filesize
72KB

Download
memory/4004-120-0x000001F3B0D90000-0x000001F3B0DA0000-memory.dmp

Filesize
64KB

Download
memory/4004-121-0x000001F3B0D90000-0x000001F3B0DA0000-memory.dmp

Filesize
64KB

Download
memory/4004-123-0x00007FF8F4C40000-0x00007FF8F5701000-memory.dmp

Filesize
10.8MB

Download
memory/4004-119-0x00007FF8F4C40000-0x00007FF8F5701000-memory.dmp

Filesize
10.8MB

Download
memory/4452-102-0x00007FF8F4C40000-0x00007FF8F5701000-memory.dmp

Filesize
10.8MB

Download
memory/4452-98-0x00007FF8F4C40000-0x00007FF8F5701000-memory.dmp

Filesize
10.8MB

Download
memory/4452-99-0x000001D6B4CA0000-0x000001D6B4CB0000-memory.dmp

Filesize
64KB

Download
memory/4452-100-0x000001D6B4CA0000-0x000001D6B4CB0000-memory.dmp

Filesize
64KB

Download