umbral | b605c1dc4ebfc6fa7b93c1c37833114e37cc150f6ea3d1c19696116b44231558

Analysis

max time kernel
100s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
03/12/2024, 21:07

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General

Target

b605c1dc4ebfc6fa7b93c1c37833114e37cc150f6ea3d1c19696116b44231558.exe
Size

502KB
MD5

3eeeb1f49079f046982efdbb06982a44
SHA1

fedc3f54f621cd91d88677371386c7c6c26743c1
SHA256

b605c1dc4ebfc6fa7b93c1c37833114e37cc150f6ea3d1c19696116b44231558
SHA512

829a085c012b8dbcd6c215a48b371b41171b75f3943aaac2dec50c7912f6b85d072eeaf5c6ebb997666dfec0cf3c038f249eb5c0dd516bc7a4c771384d6fee91
SSDEEP

12288:PyveQB/fTHIGaPkKEYzURNAwbAg3/iBsNC3v6R/ZL:PuDXTIGaPhEYzUzA0cBf3CNp

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 2 IoCs

resource	yara_rule
behavioral2/files/0x0008000000023ca1-4.dat	family_umbral
behavioral2/memory/724-13-0x000002886BE50000-0x000002886BE94000-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
2724	powershell.exe
2840	powershell.exe
2044	powershell.exe
3504	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	Nursultan Release.exe

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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	b605c1dc4ebfc6fa7b93c1c37833114e37cc150f6ea3d1c19696116b44231558.exe

Executes dropped EXE 1 IoCs

pid	Process
724	Nursultan Release.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
21	discord.com
20	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
8	ip-api.com

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
2728	wmic.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
724	Nursultan Release.exe
2724	powershell.exe
2724	powershell.exe
3504	powershell.exe
3504	powershell.exe
2840	powershell.exe
2840	powershell.exe
4492	powershell.exe
4492	powershell.exe
2044	powershell.exe
2044	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	724	Nursultan Release.exe
Token: SeIncreaseQuotaPrivilege	3332	wmic.exe
Token: SeSecurityPrivilege	3332	wmic.exe
Token: SeTakeOwnershipPrivilege	3332	wmic.exe
Token: SeLoadDriverPrivilege	3332	wmic.exe
Token: SeSystemProfilePrivilege	3332	wmic.exe
Token: SeSystemtimePrivilege	3332	wmic.exe
Token: SeProfSingleProcessPrivilege	3332	wmic.exe
Token: SeIncBasePriorityPrivilege	3332	wmic.exe
Token: SeCreatePagefilePrivilege	3332	wmic.exe
Token: SeBackupPrivilege	3332	wmic.exe
Token: SeRestorePrivilege	3332	wmic.exe
Token: SeShutdownPrivilege	3332	wmic.exe
Token: SeDebugPrivilege	3332	wmic.exe
Token: SeSystemEnvironmentPrivilege	3332	wmic.exe
Token: SeRemoteShutdownPrivilege	3332	wmic.exe
Token: SeUndockPrivilege	3332	wmic.exe
Token: SeManageVolumePrivilege	3332	wmic.exe
Token: 33	3332	wmic.exe
Token: 34	3332	wmic.exe
Token: 35	3332	wmic.exe
Token: 36	3332	wmic.exe
Token: SeIncreaseQuotaPrivilege	3332	wmic.exe
Token: SeSecurityPrivilege	3332	wmic.exe
Token: SeTakeOwnershipPrivilege	3332	wmic.exe
Token: SeLoadDriverPrivilege	3332	wmic.exe
Token: SeSystemProfilePrivilege	3332	wmic.exe
Token: SeSystemtimePrivilege	3332	wmic.exe
Token: SeProfSingleProcessPrivilege	3332	wmic.exe
Token: SeIncBasePriorityPrivilege	3332	wmic.exe
Token: SeCreatePagefilePrivilege	3332	wmic.exe
Token: SeBackupPrivilege	3332	wmic.exe
Token: SeRestorePrivilege	3332	wmic.exe
Token: SeShutdownPrivilege	3332	wmic.exe
Token: SeDebugPrivilege	3332	wmic.exe
Token: SeSystemEnvironmentPrivilege	3332	wmic.exe
Token: SeRemoteShutdownPrivilege	3332	wmic.exe
Token: SeUndockPrivilege	3332	wmic.exe
Token: SeManageVolumePrivilege	3332	wmic.exe
Token: 33	3332	wmic.exe
Token: 34	3332	wmic.exe
Token: 35	3332	wmic.exe
Token: 36	3332	wmic.exe
Token: SeDebugPrivilege	2724	powershell.exe
Token: SeDebugPrivilege	3504	powershell.exe
Token: SeDebugPrivilege	2840	powershell.exe
Token: SeDebugPrivilege	4492	powershell.exe
Token: SeIncreaseQuotaPrivilege	4844	wmic.exe
Token: SeSecurityPrivilege	4844	wmic.exe
Token: SeTakeOwnershipPrivilege	4844	wmic.exe
Token: SeLoadDriverPrivilege	4844	wmic.exe
Token: SeSystemProfilePrivilege	4844	wmic.exe
Token: SeSystemtimePrivilege	4844	wmic.exe
Token: SeProfSingleProcessPrivilege	4844	wmic.exe
Token: SeIncBasePriorityPrivilege	4844	wmic.exe
Token: SeCreatePagefilePrivilege	4844	wmic.exe
Token: SeBackupPrivilege	4844	wmic.exe
Token: SeRestorePrivilege	4844	wmic.exe
Token: SeShutdownPrivilege	4844	wmic.exe
Token: SeDebugPrivilege	4844	wmic.exe
Token: SeSystemEnvironmentPrivilege	4844	wmic.exe
Token: SeRemoteShutdownPrivilege	4844	wmic.exe
Token: SeUndockPrivilege	4844	wmic.exe
Token: SeManageVolumePrivilege	4844	wmic.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 4828 wrote to memory of 724	4828	b605c1dc4ebfc6fa7b93c1c37833114e37cc150f6ea3d1c19696116b44231558.exe	83
PID 4828 wrote to memory of 724	4828	b605c1dc4ebfc6fa7b93c1c37833114e37cc150f6ea3d1c19696116b44231558.exe	83
PID 724 wrote to memory of 3332	724	Nursultan Release.exe	85
PID 724 wrote to memory of 3332	724	Nursultan Release.exe	85
PID 724 wrote to memory of 2724	724	Nursultan Release.exe	88
PID 724 wrote to memory of 2724	724	Nursultan Release.exe	88
PID 724 wrote to memory of 3504	724	Nursultan Release.exe	90
PID 724 wrote to memory of 3504	724	Nursultan Release.exe	90
PID 724 wrote to memory of 2840	724	Nursultan Release.exe	92
PID 724 wrote to memory of 2840	724	Nursultan Release.exe	92
PID 724 wrote to memory of 4492	724	Nursultan Release.exe	94
PID 724 wrote to memory of 4492	724	Nursultan Release.exe	94
PID 724 wrote to memory of 4844	724	Nursultan Release.exe	96
PID 724 wrote to memory of 4844	724	Nursultan Release.exe	96
PID 724 wrote to memory of 3832	724	Nursultan Release.exe	98
PID 724 wrote to memory of 3832	724	Nursultan Release.exe	98
PID 724 wrote to memory of 4868	724	Nursultan Release.exe	100
PID 724 wrote to memory of 4868	724	Nursultan Release.exe	100
PID 724 wrote to memory of 2044	724	Nursultan Release.exe	102
PID 724 wrote to memory of 2044	724	Nursultan Release.exe	102
PID 724 wrote to memory of 2728	724	Nursultan Release.exe	104
PID 724 wrote to memory of 2728	724	Nursultan Release.exe	104

C:\Users\Admin\AppData\Local\Temp\b605c1dc4ebfc6fa7b93c1c37833114e37cc150f6ea3d1c19696116b44231558.exe
"C:\Users\Admin\AppData\Local\Temp\b605c1dc4ebfc6fa7b93c1c37833114e37cc150f6ea3d1c19696116b44231558.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4828
- C:\Users\Admin\AppData\Local\Temp\RarSFX0\Nursultan Release.exe
  "C:\Users\Admin\AppData\Local\Temp\RarSFX0\Nursultan Release.exe"
  2⤵
  - Drops file in Drivers directory
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:724
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:3332
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\RarSFX0\Nursultan Release.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2724
- - 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⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3504
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2840
- - 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:4492
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" os get Caption
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:4844
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" computersystem get totalphysicalmemory
    3⤵
    PID:3832
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    PID:4868
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    PID:2044
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic" path win32_VideoController get name
    3⤵
    - Detects videocard installed
    PID:2728

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

Query Registry

T1012

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\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
c9b6705519e1eef08f86c4ba5f4286f3

SHA1
6c6b179e452ecee2673a1d4fe128f1c06f70577f

SHA256
0f9cad44a79126871580e19b01dc3f880c5173b1faaf8b9018d5d1f829714705

SHA512
6d8f85a7a8b0b124530f36a157cd0441b5c1eacdc35e274af9fbf0569d03d1d5e468651a5b2425f0215c282ecfa7b1ffeaeeaf18612822f00bd14306d30640c7

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
45ad40f012b09e141955482368549640

SHA1
3f9cd15875c1e397c3b2b5592805577ae88a96cb

SHA256
ea3b59172f1a33677f9cb3843fb4d6093b806d3a7cf2f3c6d4692f5421f656ce

SHA512
3de08f8affca1c1450088f560776cf3d65146cadac43c06eb922c7b3cea436e519966cf38458303ffeb1a58c53f8952cffda6c34216fda7594e014b516e83b33

Download Submit
C:\Users\Admin\AppData\Local\Temp\RarSFX0\Nursultan Release.exe

Filesize
246KB

MD5
99b33e9bb4fb78746843fda390f94316

SHA1
dc37eb3c93711038d85cfc8fd0327668b1b7c78f

SHA256
5a73c5b79ca140f97de95c714e0570df2a64cc9c94eead78eb7878fc37542f48

SHA512
6c14e5dcc3b3a688da5aa36b9bdfa5ff51e18cd6543c83e5029bc077d7039b14e3c63cc48981f63b2593a586c006dcae044a4e68b6782c9fd4a0e5f5abf4bfde

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ha5hujr2.rmf.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/724-41-0x000002886E620000-0x000002886E696000-memory.dmp

Filesize
472KB

Download
memory/724-42-0x000002886DC60000-0x000002886DCB0000-memory.dmp

Filesize
320KB

Download
memory/724-43-0x000002886DAD0000-0x000002886DAEE000-memory.dmp

Filesize
120KB

Download
memory/724-14-0x00007FFEEDD40000-0x00007FFEEE801000-memory.dmp

Filesize
10.8MB

Download
memory/724-13-0x000002886BE50000-0x000002886BE94000-memory.dmp

Filesize
272KB

Download
memory/724-80-0x000002886DB20000-0x000002886DB2A000-memory.dmp

Filesize
40KB

Download
memory/724-81-0x000002886DCD0000-0x000002886DCE2000-memory.dmp

Filesize
72KB

Download
memory/724-12-0x00007FFEEDD43000-0x00007FFEEDD45000-memory.dmp

Filesize
8KB

Download
memory/724-101-0x00007FFEEDD40000-0x00007FFEEE801000-memory.dmp

Filesize
10.8MB

Download
memory/2724-16-0x000001BDE0810000-0x000001BDE0832000-memory.dmp

Filesize
136KB

Download