umbral | 0c6e6a1c2c50a0a1ab3f74ea0985e14003921c3b7f4e427b56c7673439accb8b

Analysis

max time kernel
30s
max time network
18s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
11-12-2024 21:08

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

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
behavioral3/memory/3932-1-0x000001D6C29E0000-0x000001D6C2A20000-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
4320	powershell.exe
5084	powershell.exe
4276	powershell.exe
1684	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
19	discord.com
21	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
17	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
3476	wmic.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
4320	powershell.exe
4320	powershell.exe
5084	powershell.exe
5084	powershell.exe
4276	powershell.exe
4276	powershell.exe
2200	powershell.exe
2200	powershell.exe
1684	powershell.exe
1684	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3932	NerestPCFree 0.31.1 fixed.exe
Token: SeDebugPrivilege	4320	powershell.exe
Token: SeDebugPrivilege	5084	powershell.exe
Token: SeDebugPrivilege	4276	powershell.exe
Token: SeDebugPrivilege	2200	powershell.exe
Token: SeIncreaseQuotaPrivilege	3548	wmic.exe
Token: SeSecurityPrivilege	3548	wmic.exe
Token: SeTakeOwnershipPrivilege	3548	wmic.exe
Token: SeLoadDriverPrivilege	3548	wmic.exe
Token: SeSystemProfilePrivilege	3548	wmic.exe
Token: SeSystemtimePrivilege	3548	wmic.exe
Token: SeProfSingleProcessPrivilege	3548	wmic.exe
Token: SeIncBasePriorityPrivilege	3548	wmic.exe
Token: SeCreatePagefilePrivilege	3548	wmic.exe
Token: SeBackupPrivilege	3548	wmic.exe
Token: SeRestorePrivilege	3548	wmic.exe
Token: SeShutdownPrivilege	3548	wmic.exe
Token: SeDebugPrivilege	3548	wmic.exe
Token: SeSystemEnvironmentPrivilege	3548	wmic.exe
Token: SeRemoteShutdownPrivilege	3548	wmic.exe
Token: SeUndockPrivilege	3548	wmic.exe
Token: SeManageVolumePrivilege	3548	wmic.exe
Token: 33	3548	wmic.exe
Token: 34	3548	wmic.exe
Token: 35	3548	wmic.exe
Token: 36	3548	wmic.exe
Token: SeIncreaseQuotaPrivilege	3548	wmic.exe
Token: SeSecurityPrivilege	3548	wmic.exe
Token: SeTakeOwnershipPrivilege	3548	wmic.exe
Token: SeLoadDriverPrivilege	3548	wmic.exe
Token: SeSystemProfilePrivilege	3548	wmic.exe
Token: SeSystemtimePrivilege	3548	wmic.exe
Token: SeProfSingleProcessPrivilege	3548	wmic.exe
Token: SeIncBasePriorityPrivilege	3548	wmic.exe
Token: SeCreatePagefilePrivilege	3548	wmic.exe
Token: SeBackupPrivilege	3548	wmic.exe
Token: SeRestorePrivilege	3548	wmic.exe
Token: SeShutdownPrivilege	3548	wmic.exe
Token: SeDebugPrivilege	3548	wmic.exe
Token: SeSystemEnvironmentPrivilege	3548	wmic.exe
Token: SeRemoteShutdownPrivilege	3548	wmic.exe
Token: SeUndockPrivilege	3548	wmic.exe
Token: SeManageVolumePrivilege	3548	wmic.exe
Token: 33	3548	wmic.exe
Token: 34	3548	wmic.exe
Token: 35	3548	wmic.exe
Token: 36	3548	wmic.exe
Token: SeIncreaseQuotaPrivilege	3248	wmic.exe
Token: SeSecurityPrivilege	3248	wmic.exe
Token: SeTakeOwnershipPrivilege	3248	wmic.exe
Token: SeLoadDriverPrivilege	3248	wmic.exe
Token: SeSystemProfilePrivilege	3248	wmic.exe
Token: SeSystemtimePrivilege	3248	wmic.exe
Token: SeProfSingleProcessPrivilege	3248	wmic.exe
Token: SeIncBasePriorityPrivilege	3248	wmic.exe
Token: SeCreatePagefilePrivilege	3248	wmic.exe
Token: SeBackupPrivilege	3248	wmic.exe
Token: SeRestorePrivilege	3248	wmic.exe
Token: SeShutdownPrivilege	3248	wmic.exe
Token: SeDebugPrivilege	3248	wmic.exe
Token: SeSystemEnvironmentPrivilege	3248	wmic.exe
Token: SeRemoteShutdownPrivilege	3248	wmic.exe
Token: SeUndockPrivilege	3248	wmic.exe
Token: SeManageVolumePrivilege	3248	wmic.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 3932 wrote to memory of 4320	3932	NerestPCFree 0.31.1 fixed.exe	83
PID 3932 wrote to memory of 4320	3932	NerestPCFree 0.31.1 fixed.exe	83
PID 3932 wrote to memory of 5084	3932	NerestPCFree 0.31.1 fixed.exe	85
PID 3932 wrote to memory of 5084	3932	NerestPCFree 0.31.1 fixed.exe	85
PID 3932 wrote to memory of 4276	3932	NerestPCFree 0.31.1 fixed.exe	87
PID 3932 wrote to memory of 4276	3932	NerestPCFree 0.31.1 fixed.exe	87
PID 3932 wrote to memory of 2200	3932	NerestPCFree 0.31.1 fixed.exe	89
PID 3932 wrote to memory of 2200	3932	NerestPCFree 0.31.1 fixed.exe	89
PID 3932 wrote to memory of 3548	3932	NerestPCFree 0.31.1 fixed.exe	91
PID 3932 wrote to memory of 3548	3932	NerestPCFree 0.31.1 fixed.exe	91
PID 3932 wrote to memory of 3248	3932	NerestPCFree 0.31.1 fixed.exe	94
PID 3932 wrote to memory of 3248	3932	NerestPCFree 0.31.1 fixed.exe	94
PID 3932 wrote to memory of 3324	3932	NerestPCFree 0.31.1 fixed.exe	96
PID 3932 wrote to memory of 3324	3932	NerestPCFree 0.31.1 fixed.exe	96
PID 3932 wrote to memory of 1684	3932	NerestPCFree 0.31.1 fixed.exe	98
PID 3932 wrote to memory of 1684	3932	NerestPCFree 0.31.1 fixed.exe	98
PID 3932 wrote to memory of 3476	3932	NerestPCFree 0.31.1 fixed.exe	101
PID 3932 wrote to memory of 3476	3932	NerestPCFree 0.31.1 fixed.exe	101

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:3932
- 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:4320
- 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:5084
- 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:4276
- 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:2200
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3548
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3248
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3324
- 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:1684
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:3476

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

Replay Monitor

Loading Replay Monitor...

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
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
948B

MD5
c65738617888921a153bd9b1ef516ee7

SHA1
5245e71ea3c181d76320c857b639272ac9e079b1

SHA256
4640ba4001fd16a593315299cbdd4988dc2c7075820687f1018aac40aca95c26

SHA512
2e2a0ebd93f9d8dd07a7599054bce232683e9add9a35e77b584618040bcfd84a42545352519ec4736cc379002210b6f3ed2d905591c6925c0981b0392b495bfa

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

Filesize
1KB

MD5
276798eeb29a49dc6e199768bc9c2e71

SHA1
5fdc8ccb897ac2df7476fbb07517aca5b7a6205b

SHA256
cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc

SHA512
0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2

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

Filesize
1KB

MD5
d0f0c545e9e297b285a5ec438d57d734

SHA1
f1f2f7681dabda75e811e7c7238e832acafcb930

SHA256
92a4b67ac7b67400cf19d112d1bf4ddd6be90f10e55fc26a8388272d1bbee7a5

SHA512
9e7494fb22ea4526a6c28c5638d278d2c70847bf912851fac38dcbfea5f097e9ac805f60c0ab08696e8bea9b486369afd428d566bcb92cfc11cce64ea7bfcec0

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vyf2zy5f.4rt.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2200-70-0x000001B972A90000-0x000001B972CAC000-memory.dmp

Filesize
2.1MB

Download
memory/3932-33-0x000001D6DD100000-0x000001D6DD150000-memory.dmp

Filesize
320KB

Download
memory/3932-34-0x000001D6DCFC0000-0x000001D6DCFDE000-memory.dmp

Filesize
120KB

Download
memory/3932-94-0x00007FFCD4320000-0x00007FFCD4DE1000-memory.dmp

Filesize
10.8MB

Download
memory/3932-2-0x00007FFCD4320000-0x00007FFCD4DE1000-memory.dmp

Filesize
10.8MB

Download
memory/3932-1-0x000001D6C29E0000-0x000001D6C2A20000-memory.dmp

Filesize
256KB

Download
memory/3932-32-0x000001D6DD180000-0x000001D6DD1F6000-memory.dmp

Filesize
472KB

Download
memory/3932-74-0x000001D6DD200000-0x000001D6DD212000-memory.dmp

Filesize
72KB

Download
memory/3932-73-0x000001D6DCFA0000-0x000001D6DCFAA000-memory.dmp

Filesize
40KB

Download
memory/3932-0-0x00007FFCD4323000-0x00007FFCD4325000-memory.dmp

Filesize
8KB

Download
memory/4276-58-0x00000296B0270000-0x00000296B048C000-memory.dmp

Filesize
2.1MB

Download
memory/4320-14-0x00007FFCD4320000-0x00007FFCD4DE1000-memory.dmp

Filesize
10.8MB

Download
memory/4320-9-0x000001FF4D1D0000-0x000001FF4D1F2000-memory.dmp

Filesize
136KB

Download
memory/4320-18-0x000001FF4CEB0000-0x000001FF4D0CC000-memory.dmp

Filesize
2.1MB

Download
memory/4320-15-0x00007FFCD4320000-0x00007FFCD4DE1000-memory.dmp

Filesize
10.8MB

Download
memory/4320-10-0x00007FFCD4320000-0x00007FFCD4DE1000-memory.dmp

Filesize
10.8MB

Download
memory/4320-19-0x00007FFCD4320000-0x00007FFCD4DE1000-memory.dmp

Filesize
10.8MB

Download