umbral | 0c6e6a1c2c50a0a1ab3f74ea0985e14003921c3b7f4e427b56c7673439accb8b

Analysis

max time kernel
7s
max time network
8s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241211-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241211-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
11-12-2024 21:08

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General

Target

NerestPCFree 0.31.1 fixed.exe
Size

231KB
MD5

08dce587975cb4a6cb1333bd7d3aea6c
SHA1

4c855f6bb5cad027522d0a063cb4f1cd6e97b163
SHA256

0c6e6a1c2c50a0a1ab3f74ea0985e14003921c3b7f4e427b56c7673439accb8b
SHA512

19f21d6f976a971f4bffbf74a7b6450ec6b6ec02d837422a5c5edbd3fb825e630642e4b840e181484a2e0e47997631ad7012f1f710aa098538164c8998592f81
SSDEEP

6144:xloZMCrIkd8g+EtXHkv/iD4LsUtt74szYKrd4UBr8b8e1mOoi:DoZZL+EP8LsUtt74szYKrd4UBAJ

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral4/memory/3652-1-0x000001D486B90000-0x000001D486BD0000-memory.dmp	family_umbral

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

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

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

execution

PowerShell

T1059.001

pid	Process
5864	powershell.exe
1524	powershell.exe
3308	powershell.exe
4688	powershell.exe

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
13	discord.com
14	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
10	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
5064	wmic.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

pid	Process
5864	powershell.exe
5864	powershell.exe
1524	powershell.exe
1524	powershell.exe
3308	powershell.exe
3308	powershell.exe
5692	powershell.exe
5692	powershell.exe
1792	wmic.exe
1792	wmic.exe
1792	wmic.exe
1792	wmic.exe
3772	wmic.exe
3772	wmic.exe
3772	wmic.exe
3772	wmic.exe
5140	wmic.exe
5140	wmic.exe
5140	wmic.exe
5140	wmic.exe
4688	powershell.exe
4688	powershell.exe
5064	wmic.exe
5064	wmic.exe
5064	wmic.exe
5064	wmic.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3652	NerestPCFree 0.31.1 fixed.exe
Token: SeDebugPrivilege	5864	powershell.exe
Token: SeIncreaseQuotaPrivilege	5864	powershell.exe
Token: SeSecurityPrivilege	5864	powershell.exe
Token: SeTakeOwnershipPrivilege	5864	powershell.exe
Token: SeLoadDriverPrivilege	5864	powershell.exe
Token: SeSystemProfilePrivilege	5864	powershell.exe
Token: SeSystemtimePrivilege	5864	powershell.exe
Token: SeProfSingleProcessPrivilege	5864	powershell.exe
Token: SeIncBasePriorityPrivilege	5864	powershell.exe
Token: SeCreatePagefilePrivilege	5864	powershell.exe
Token: SeBackupPrivilege	5864	powershell.exe
Token: SeRestorePrivilege	5864	powershell.exe
Token: SeShutdownPrivilege	5864	powershell.exe
Token: SeDebugPrivilege	5864	powershell.exe
Token: SeSystemEnvironmentPrivilege	5864	powershell.exe
Token: SeRemoteShutdownPrivilege	5864	powershell.exe
Token: SeUndockPrivilege	5864	powershell.exe
Token: SeManageVolumePrivilege	5864	powershell.exe
Token: 33	5864	powershell.exe
Token: 34	5864	powershell.exe
Token: 35	5864	powershell.exe
Token: 36	5864	powershell.exe
Token: SeDebugPrivilege	1524	powershell.exe
Token: SeDebugPrivilege	3308	powershell.exe
Token: SeDebugPrivilege	5692	powershell.exe
Token: SeIncreaseQuotaPrivilege	1792	wmic.exe
Token: SeSecurityPrivilege	1792	wmic.exe
Token: SeTakeOwnershipPrivilege	1792	wmic.exe
Token: SeLoadDriverPrivilege	1792	wmic.exe
Token: SeSystemProfilePrivilege	1792	wmic.exe
Token: SeSystemtimePrivilege	1792	wmic.exe
Token: SeProfSingleProcessPrivilege	1792	wmic.exe
Token: SeIncBasePriorityPrivilege	1792	wmic.exe
Token: SeCreatePagefilePrivilege	1792	wmic.exe
Token: SeBackupPrivilege	1792	wmic.exe
Token: SeRestorePrivilege	1792	wmic.exe
Token: SeShutdownPrivilege	1792	wmic.exe
Token: SeDebugPrivilege	1792	wmic.exe
Token: SeSystemEnvironmentPrivilege	1792	wmic.exe
Token: SeRemoteShutdownPrivilege	1792	wmic.exe
Token: SeUndockPrivilege	1792	wmic.exe
Token: SeManageVolumePrivilege	1792	wmic.exe
Token: 33	1792	wmic.exe
Token: 34	1792	wmic.exe
Token: 35	1792	wmic.exe
Token: 36	1792	wmic.exe
Token: SeIncreaseQuotaPrivilege	1792	wmic.exe
Token: SeSecurityPrivilege	1792	wmic.exe
Token: SeTakeOwnershipPrivilege	1792	wmic.exe
Token: SeLoadDriverPrivilege	1792	wmic.exe
Token: SeSystemProfilePrivilege	1792	wmic.exe
Token: SeSystemtimePrivilege	1792	wmic.exe
Token: SeProfSingleProcessPrivilege	1792	wmic.exe
Token: SeIncBasePriorityPrivilege	1792	wmic.exe
Token: SeCreatePagefilePrivilege	1792	wmic.exe
Token: SeBackupPrivilege	1792	wmic.exe
Token: SeRestorePrivilege	1792	wmic.exe
Token: SeShutdownPrivilege	1792	wmic.exe
Token: SeDebugPrivilege	1792	wmic.exe
Token: SeSystemEnvironmentPrivilege	1792	wmic.exe
Token: SeRemoteShutdownPrivilege	1792	wmic.exe
Token: SeUndockPrivilege	1792	wmic.exe
Token: SeManageVolumePrivilege	1792	wmic.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 3652 wrote to memory of 5864	3652	NerestPCFree 0.31.1 fixed.exe	80
PID 3652 wrote to memory of 5864	3652	NerestPCFree 0.31.1 fixed.exe	80
PID 3652 wrote to memory of 1524	3652	NerestPCFree 0.31.1 fixed.exe	83
PID 3652 wrote to memory of 1524	3652	NerestPCFree 0.31.1 fixed.exe	83
PID 3652 wrote to memory of 3308	3652	NerestPCFree 0.31.1 fixed.exe	85
PID 3652 wrote to memory of 3308	3652	NerestPCFree 0.31.1 fixed.exe	85
PID 3652 wrote to memory of 5692	3652	NerestPCFree 0.31.1 fixed.exe	87
PID 3652 wrote to memory of 5692	3652	NerestPCFree 0.31.1 fixed.exe	87
PID 3652 wrote to memory of 1792	3652	NerestPCFree 0.31.1 fixed.exe	89
PID 3652 wrote to memory of 1792	3652	NerestPCFree 0.31.1 fixed.exe	89
PID 3652 wrote to memory of 3772	3652	NerestPCFree 0.31.1 fixed.exe	92
PID 3652 wrote to memory of 3772	3652	NerestPCFree 0.31.1 fixed.exe	92
PID 3652 wrote to memory of 5140	3652	NerestPCFree 0.31.1 fixed.exe	94
PID 3652 wrote to memory of 5140	3652	NerestPCFree 0.31.1 fixed.exe	94
PID 3652 wrote to memory of 4688	3652	NerestPCFree 0.31.1 fixed.exe	96
PID 3652 wrote to memory of 4688	3652	NerestPCFree 0.31.1 fixed.exe	96
PID 3652 wrote to memory of 5064	3652	NerestPCFree 0.31.1 fixed.exe	98
PID 3652 wrote to memory of 5064	3652	NerestPCFree 0.31.1 fixed.exe	98

C:\Users\Admin\AppData\Local\Temp\NerestPCFree 0.31.1 fixed.exe
"C:\Users\Admin\AppData\Local\Temp\NerestPCFree 0.31.1 fixed.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3652
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\NerestPCFree 0.31.1 fixed.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5864
- 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:1524
- 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:3308
- 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:5692
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1792
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:3772
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:5140
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  PID:4688
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  - Suspicious behavior: EnumeratesProcesses
  PID:5064

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

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

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

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Downloads

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

Filesize
1KB

MD5
60b3262c3163ee3d466199160b9ed07d

SHA1
994ece4ea4e61de0be2fdd580f87e3415f9e1ff6

SHA256
e3b30f16d41f94cba2b8a75f35c91ae7418465abfbfe5477ec0551d1952b2fdb

SHA512
081d2015cb94477eb0fbc38f44b6d9b4a3204fb3ad0b7d0e146a88ab4ab9a0d475207f1adae03f4a81ccc5beb7568dc8be1249f69e32fe56efd9ee2f6ee3b1af

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

Filesize
948B

MD5
8a5d9a484bd4e85a222d5b14a4c11f39

SHA1
4618695eeeca3b0d17d5c1fd4bd9087266357b0b

SHA256
6dac33e2751171c49cc0901b7cc70aa052da97095e129589c905c531554c36ff

SHA512
c98b6b74617da08577ed385f162bde9115e1ab90ce4f69c5907a5e6eb70e26451d0d6c6f7f43c3e7ec28630708730232fdadbdf6836649385747c2ec01f55fb1

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

Filesize
1KB

MD5
8e1fdd1b66d2fee9f6a052524d4ddca5

SHA1
0a9d0994559d1be2eecd8b0d6960540ca627bdb6

SHA256
4cc7c1b79d1b48582d4dc27ca8c31457b9bf2441deb7914399bb9e6863f18b13

SHA512
5a5494b878b08e8515811ab7a3d68780dac7423f5562477d98249a8bedf7ec98567b7cd5d4c6967d6bc63f2d6d9b7da9a65e0eb29d4b955026b469b5b598d1f3

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

Filesize
1KB

MD5
be32ce7096b7fba3ffa26237507c0493

SHA1
b93ef0272fd75e3a1eee1b5e8ab1b8f1bb2452a9

SHA256
02924c8c15788bf3e8016fb3cde2f56cd9142dec75c0773dd3b844895facdb76

SHA512
b75746cdcae4dac1d333e1797d3878e68414e44613f4233b7b05c58cd2a926fb6d18a562b9f434330a9c1764f0a0489a88f387dd4eca62013ca3f8a677991f04

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_fdbfc2wb.zuy.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3652-58-0x000001D4A1270000-0x000001D4A127A000-memory.dmp

Filesize
40KB

Download
memory/3652-0-0x00007FF9A6FE3000-0x00007FF9A6FE5000-memory.dmp

Filesize
8KB

Download
memory/3652-80-0x00007FF9A6FE0000-0x00007FF9A7AA2000-memory.dmp

Filesize
10.8MB

Download
memory/3652-79-0x000001D4A13A0000-0x000001D4A1547000-memory.dmp

Filesize
1.7MB

Download
memory/3652-75-0x00007FF9A6FE0000-0x00007FF9A7AA2000-memory.dmp

Filesize
10.8MB

Download
memory/3652-74-0x00007FF9A6FE3000-0x00007FF9A6FE5000-memory.dmp

Filesize
8KB

Download
memory/3652-1-0x000001D486B90000-0x000001D486BD0000-memory.dmp

Filesize
256KB

Download
memory/3652-59-0x000001D4A1550000-0x000001D4A1562000-memory.dmp

Filesize
72KB

Download
memory/3652-32-0x000001D4A12D0000-0x000001D4A1346000-memory.dmp

Filesize
472KB

Download
memory/3652-33-0x000001D4A1350000-0x000001D4A13A0000-memory.dmp

Filesize
320KB

Download
memory/3652-34-0x000001D488A50000-0x000001D488A6E000-memory.dmp

Filesize
120KB

Download
memory/3652-2-0x00007FF9A6FE0000-0x00007FF9A7AA2000-memory.dmp

Filesize
10.8MB

Download
memory/5864-12-0x0000028078600000-0x0000028078622000-memory.dmp

Filesize
136KB

Download
memory/5864-14-0x00007FF9A6FE0000-0x00007FF9A7AA2000-memory.dmp

Filesize
10.8MB

Download
memory/5864-13-0x00007FF9A6FE0000-0x00007FF9A7AA2000-memory.dmp

Filesize
10.8MB

Download
memory/5864-20-0x00007FF9A6FE0000-0x00007FF9A7AA2000-memory.dmp

Filesize
10.8MB

Download
memory/5864-19-0x00000280787C0000-0x00000280789DD000-memory.dmp

Filesize
2.1MB

Download
memory/5864-17-0x00007FF9A6FE0000-0x00007FF9A7AA2000-memory.dmp

Filesize
10.8MB

Download
memory/5864-16-0x00007FF9A6FE0000-0x00007FF9A7AA2000-memory.dmp

Filesize
10.8MB

Download
memory/5864-15-0x00007FF9A6FE0000-0x00007FF9A7AA2000-memory.dmp

Filesize
10.8MB

Download