umbral | ac9fb718a06f5ea046a5ce765f84c202c08c45814bcd10c9e74de3dfc8301878

Analysis

max time kernel
150s
max time network
126s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-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

Extracted

Family

umbral

https://discord.com/api/webhooks/1181984415631556658/BCw2PGM7G2P1INjg20jIb3iks900bskPUiI8iXan-y9H-QjeQliGxPeRcMF8V8-SmGiy

Signatures

Detect Umbral payload 3 IoCs

resource	yara_rule
behavioral3/memory/3040-6-0x0000000000670000-0x00000000006AE000-memory.dmp	family_umbral
behavioral3/files/0x0032000000015e24-9.dat	family_umbral
behavioral3/memory/2660-13-0x0000000000C50000-0x0000000000C90000-memory.dmp	family_umbral

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

Executes dropped EXE 1 IoCs

pid	Process
2660	nostalgia_authentication.exe

Loads dropped DLL 1 IoCs

pid	Process
3040	NostalgiaPaste.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
4	ip-api.com

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
3040	NostalgiaPaste.exe
3040	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
2204	wmic.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
2916	powershell.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
2528	powershell.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
2860	powershell.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
3040	NostalgiaPaste.exe
1900	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3040	NostalgiaPaste.exe
Token: SeDebugPrivilege	2660	nostalgia_authentication.exe
Token: SeDebugPrivilege	2916	powershell.exe
Token: SeDebugPrivilege	2528	powershell.exe
Token: SeDebugPrivilege	2860	powershell.exe
Token: SeDebugPrivilege	1900	powershell.exe
Token: SeIncreaseQuotaPrivilege	268	wmic.exe
Token: SeSecurityPrivilege	268	wmic.exe
Token: SeTakeOwnershipPrivilege	268	wmic.exe
Token: SeLoadDriverPrivilege	268	wmic.exe
Token: SeSystemProfilePrivilege	268	wmic.exe
Token: SeSystemtimePrivilege	268	wmic.exe
Token: SeProfSingleProcessPrivilege	268	wmic.exe
Token: SeIncBasePriorityPrivilege	268	wmic.exe
Token: SeCreatePagefilePrivilege	268	wmic.exe
Token: SeBackupPrivilege	268	wmic.exe
Token: SeRestorePrivilege	268	wmic.exe
Token: SeShutdownPrivilege	268	wmic.exe
Token: SeDebugPrivilege	268	wmic.exe
Token: SeSystemEnvironmentPrivilege	268	wmic.exe
Token: SeRemoteShutdownPrivilege	268	wmic.exe
Token: SeUndockPrivilege	268	wmic.exe
Token: SeManageVolumePrivilege	268	wmic.exe
Token: 33	268	wmic.exe
Token: 34	268	wmic.exe
Token: 35	268	wmic.exe
Token: SeIncreaseQuotaPrivilege	268	wmic.exe
Token: SeSecurityPrivilege	268	wmic.exe
Token: SeTakeOwnershipPrivilege	268	wmic.exe
Token: SeLoadDriverPrivilege	268	wmic.exe
Token: SeSystemProfilePrivilege	268	wmic.exe
Token: SeSystemtimePrivilege	268	wmic.exe
Token: SeProfSingleProcessPrivilege	268	wmic.exe
Token: SeIncBasePriorityPrivilege	268	wmic.exe
Token: SeCreatePagefilePrivilege	268	wmic.exe
Token: SeBackupPrivilege	268	wmic.exe
Token: SeRestorePrivilege	268	wmic.exe
Token: SeShutdownPrivilege	268	wmic.exe
Token: SeDebugPrivilege	268	wmic.exe
Token: SeSystemEnvironmentPrivilege	268	wmic.exe
Token: SeRemoteShutdownPrivilege	268	wmic.exe
Token: SeUndockPrivilege	268	wmic.exe
Token: SeManageVolumePrivilege	268	wmic.exe
Token: 33	268	wmic.exe
Token: 34	268	wmic.exe
Token: 35	268	wmic.exe
Token: SeIncreaseQuotaPrivilege	2804	wmic.exe
Token: SeSecurityPrivilege	2804	wmic.exe
Token: SeTakeOwnershipPrivilege	2804	wmic.exe
Token: SeLoadDriverPrivilege	2804	wmic.exe
Token: SeSystemProfilePrivilege	2804	wmic.exe
Token: SeSystemtimePrivilege	2804	wmic.exe
Token: SeProfSingleProcessPrivilege	2804	wmic.exe
Token: SeIncBasePriorityPrivilege	2804	wmic.exe
Token: SeCreatePagefilePrivilege	2804	wmic.exe
Token: SeBackupPrivilege	2804	wmic.exe
Token: SeRestorePrivilege	2804	wmic.exe
Token: SeShutdownPrivilege	2804	wmic.exe
Token: SeDebugPrivilege	2804	wmic.exe
Token: SeSystemEnvironmentPrivilege	2804	wmic.exe
Token: SeRemoteShutdownPrivilege	2804	wmic.exe
Token: SeUndockPrivilege	2804	wmic.exe
Token: SeManageVolumePrivilege	2804	wmic.exe
Token: 33	2804	wmic.exe

Suspicious use of WriteProcessMemory 31 IoCs

description	pid	Process	procid_target
PID 3040 wrote to memory of 2660	3040	NostalgiaPaste.exe	28
PID 3040 wrote to memory of 2660	3040	NostalgiaPaste.exe	28
PID 3040 wrote to memory of 2660	3040	NostalgiaPaste.exe	28
PID 3040 wrote to memory of 2660	3040	NostalgiaPaste.exe	28
PID 2660 wrote to memory of 2916	2660	nostalgia_authentication.exe	29
PID 2660 wrote to memory of 2916	2660	nostalgia_authentication.exe	29
PID 2660 wrote to memory of 2916	2660	nostalgia_authentication.exe	29
PID 2660 wrote to memory of 2528	2660	nostalgia_authentication.exe	32
PID 2660 wrote to memory of 2528	2660	nostalgia_authentication.exe	32
PID 2660 wrote to memory of 2528	2660	nostalgia_authentication.exe	32
PID 2660 wrote to memory of 2860	2660	nostalgia_authentication.exe	33
PID 2660 wrote to memory of 2860	2660	nostalgia_authentication.exe	33
PID 2660 wrote to memory of 2860	2660	nostalgia_authentication.exe	33
PID 2660 wrote to memory of 1900	2660	nostalgia_authentication.exe	36
PID 2660 wrote to memory of 1900	2660	nostalgia_authentication.exe	36
PID 2660 wrote to memory of 1900	2660	nostalgia_authentication.exe	36
PID 2660 wrote to memory of 268	2660	nostalgia_authentication.exe	38
PID 2660 wrote to memory of 268	2660	nostalgia_authentication.exe	38
PID 2660 wrote to memory of 268	2660	nostalgia_authentication.exe	38
PID 2660 wrote to memory of 2804	2660	nostalgia_authentication.exe	41
PID 2660 wrote to memory of 2804	2660	nostalgia_authentication.exe	41
PID 2660 wrote to memory of 2804	2660	nostalgia_authentication.exe	41
PID 2660 wrote to memory of 1336	2660	nostalgia_authentication.exe	43
PID 2660 wrote to memory of 1336	2660	nostalgia_authentication.exe	43
PID 2660 wrote to memory of 1336	2660	nostalgia_authentication.exe	43
PID 2660 wrote to memory of 1292	2660	nostalgia_authentication.exe	45
PID 2660 wrote to memory of 1292	2660	nostalgia_authentication.exe	45
PID 2660 wrote to memory of 1292	2660	nostalgia_authentication.exe	45
PID 2660 wrote to memory of 2204	2660	nostalgia_authentication.exe	47
PID 2660 wrote to memory of 2204	2660	nostalgia_authentication.exe	47
PID 2660 wrote to memory of 2204	2660	nostalgia_authentication.exe	47

C:\Users\Admin\AppData\Local\Temp\NostalgiaPaste.exe
"C:\Users\Admin\AppData\Local\Temp\NostalgiaPaste.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3040
- 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:2660
- - 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:2916
- - 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:2528
- - 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:2860
- - 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:1900
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" os get Caption
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:268
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" computersystem get totalphysicalmemory
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:2804
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    PID:1336
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
    3⤵
    PID:1292
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic" path win32_VideoController get name
    3⤵
    - Detects videocard installed
    PID:2204

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

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\Roaming\Microsoft\Windows\Recent\CustomDestinations\YSJO64V25NDNKHG128QJ.temp

Filesize
7KB

MD5
864ca8a034347e0f3be22ec379109537

SHA1
91b94fbee6c9b983ee1b7c8ff3bea7997bacf08a

SHA256
5cdebb9717ef1729cbe9340f880a8ac334d6d40d9fbd1e0487dc6f64cd6312ec

SHA512
2b40f5ef30bd20d21606377de6d58fc8442aceff1293f90b3749fdbf596a69116b0546599fa1f42aeff7f53da647520aca136f08bb5bbd64c75e055cc1651076

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

Filesize
229KB

MD5
9807cd8bd9f25a62782f5ef42ef82432

SHA1
942ca4582b457f0f3768e02a3422e2646ec774e7

SHA256
9072ab80200c13dd896e67257dd9fa4f8795bbca69513d1529fa782c54ffb13d

SHA512
dd51a1d295778593c40ef27d8319ef04a0b02ee0b7a68c599aea83846d17d1db1f445ec63890639d3e9da649aac7613aa296f3e50be0a41c28683136e59ba1c3

Download Submit
memory/1292-88-0x0000000001EC0000-0x0000000001EC8000-memory.dmp

Filesize
32KB

Download
memory/1292-93-0x000000000296B000-0x00000000029D2000-memory.dmp

Filesize
412KB

Download
memory/1292-91-0x0000000002960000-0x00000000029E0000-memory.dmp

Filesize
512KB

Download
memory/1292-90-0x0000000002960000-0x00000000029E0000-memory.dmp

Filesize
512KB

Download
memory/1292-94-0x000007FEED810000-0x000007FEEE1AD000-memory.dmp

Filesize
9.6MB

Download
memory/1292-95-0x000007FEED810000-0x000007FEEE1AD000-memory.dmp

Filesize
9.6MB

Download
memory/1292-89-0x000007FEED810000-0x000007FEEE1AD000-memory.dmp

Filesize
9.6MB

Download
memory/1292-92-0x0000000002960000-0x00000000029E0000-memory.dmp

Filesize
512KB

Download
memory/1900-78-0x000007FEECE70000-0x000007FEED80D000-memory.dmp

Filesize
9.6MB

Download
memory/1900-76-0x0000000002760000-0x00000000027E0000-memory.dmp

Filesize
512KB

Download
memory/1900-77-0x000000000276B000-0x00000000027D2000-memory.dmp

Filesize
412KB

Download
memory/1900-74-0x000007FEECE70000-0x000007FEED80D000-memory.dmp

Filesize
9.6MB

Download
memory/1900-73-0x0000000002760000-0x00000000027E0000-memory.dmp

Filesize
512KB

Download
memory/1900-70-0x000007FEECE70000-0x000007FEED80D000-memory.dmp

Filesize
9.6MB

Download
memory/1900-75-0x0000000002760000-0x00000000027E0000-memory.dmp

Filesize
512KB

Download
memory/2528-43-0x0000000002A10000-0x0000000002A90000-memory.dmp

Filesize
512KB

Download
memory/2528-42-0x0000000002A10000-0x0000000002A90000-memory.dmp

Filesize
512KB

Download
memory/2528-44-0x000007FEECE70000-0x000007FEED80D000-memory.dmp

Filesize
9.6MB

Download
memory/2528-34-0x000000001B270000-0x000000001B552000-memory.dmp

Filesize
2.9MB

Download
memory/2528-37-0x0000000002A10000-0x0000000002A90000-memory.dmp

Filesize
512KB

Download
memory/2528-38-0x000007FEECE70000-0x000007FEED80D000-memory.dmp

Filesize
9.6MB

Download
memory/2528-36-0x000007FEECE70000-0x000007FEED80D000-memory.dmp

Filesize
9.6MB

Download
memory/2528-35-0x0000000002560000-0x0000000002568000-memory.dmp

Filesize
32KB

Download
memory/2528-39-0x0000000002A10000-0x0000000002A90000-memory.dmp

Filesize
512KB

Download
memory/2528-40-0x0000000002A10000-0x0000000002A90000-memory.dmp

Filesize
512KB

Download
memory/2660-15-0x000000001A660000-0x000000001A6E0000-memory.dmp

Filesize
512KB

Download
memory/2660-82-0x000000001A660000-0x000000001A6E0000-memory.dmp

Filesize
512KB

Download
memory/2660-99-0x000007FEF52C0000-0x000007FEF5CAC000-memory.dmp

Filesize
9.9MB

Download
memory/2660-13-0x0000000000C50000-0x0000000000C90000-memory.dmp

Filesize
256KB

Download
memory/2660-14-0x000007FEF52C0000-0x000007FEF5CAC000-memory.dmp

Filesize
9.9MB

Download
memory/2660-72-0x000007FEF52C0000-0x000007FEF5CAC000-memory.dmp

Filesize
9.9MB

Download
memory/2860-57-0x00000000024A0000-0x0000000002520000-memory.dmp

Filesize
512KB

Download
memory/2860-59-0x00000000024A0000-0x0000000002520000-memory.dmp

Filesize
512KB

Download
memory/2860-60-0x00000000024A0000-0x0000000002520000-memory.dmp

Filesize
512KB

Download
memory/2860-62-0x00000000024A0000-0x0000000002520000-memory.dmp

Filesize
512KB

Download
memory/2860-56-0x000007FEED810000-0x000007FEEE1AD000-memory.dmp

Filesize
9.6MB

Download
memory/2860-63-0x000007FEED810000-0x000007FEEE1AD000-memory.dmp

Filesize
9.6MB

Download
memory/2860-58-0x000007FEED810000-0x000007FEEE1AD000-memory.dmp

Filesize
9.6MB

Download
memory/2916-22-0x000007FEED810000-0x000007FEEE1AD000-memory.dmp

Filesize
9.6MB

Download
memory/2916-27-0x0000000002940000-0x00000000029C0000-memory.dmp

Filesize
512KB

Download
memory/2916-26-0x0000000002940000-0x00000000029C0000-memory.dmp

Filesize
512KB

Download
memory/2916-24-0x000007FEED810000-0x000007FEEE1AD000-memory.dmp

Filesize
9.6MB

Download
memory/2916-23-0x0000000002940000-0x00000000029C0000-memory.dmp

Filesize
512KB

Download
memory/2916-25-0x0000000002940000-0x00000000029C0000-memory.dmp

Filesize
512KB

Download
memory/2916-21-0x00000000023A0000-0x00000000023A8000-memory.dmp

Filesize
32KB

Download
memory/2916-20-0x000000001B180000-0x000000001B462000-memory.dmp

Filesize
2.9MB

Download
memory/2916-28-0x000007FEED810000-0x000007FEEE1AD000-memory.dmp

Filesize
9.6MB

Download
memory/3040-41-0x0000000074120000-0x000000007480E000-memory.dmp

Filesize
6.9MB

Download
memory/3040-61-0x0000000004A00000-0x0000000004A40000-memory.dmp

Filesize
256KB

Download
memory/3040-71-0x0000000004A00000-0x0000000004A40000-memory.dmp

Filesize
256KB

Download
memory/3040-6-0x0000000000670000-0x00000000006AE000-memory.dmp

Filesize
248KB

Download
memory/3040-5-0x0000000004A00000-0x0000000004A40000-memory.dmp

Filesize
256KB

Download
memory/3040-4-0x00000000004C0000-0x00000000004DC000-memory.dmp

Filesize
112KB

Download
memory/3040-3-0x0000000004A00000-0x0000000004A40000-memory.dmp

Filesize
256KB

Download
memory/3040-2-0x0000000000390000-0x0000000000391000-memory.dmp

Filesize
4KB

Download
memory/3040-1-0x0000000074120000-0x000000007480E000-memory.dmp

Filesize
6.9MB

Download
memory/3040-0-0x0000000000160000-0x00000000002B0000-memory.dmp

Filesize
1.3MB

Download