umbral | dc2a8b1f1aec321b087018c6177a9a6478d3ee10b04ef0ed525e3b33206ea3fc

Analysis

max time kernel
95s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
22-12-2024 19:21

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General

Target

citizen.exe
Size

231KB
MD5

8fcef0c1c33c1f00b585f79e484a63fa
SHA1

57eaedd0de6fc7b965a6b132cf23380076e63336
SHA256

dc2a8b1f1aec321b087018c6177a9a6478d3ee10b04ef0ed525e3b33206ea3fc
SHA512

ab422374c0f26ce2834b3738d7c4611f214ebb7090f98b7aa92bc1a7a273ead93186013268b5c15878f0df9c075c870ff9648001efc3f9ec03951d83df820fb0
SSDEEP

6144:RloZM+rIkd8g+EtXHkv/iD42i6kgGhZqLfiQBFUAjb8e1mAi:joZtL+EP82i6kgGhZqLfiQBFU+e

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/4184-1-0x00000161EBBC0000-0x00000161EBC00000-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
1820	powershell.exe
4680	powershell.exe
3192	powershell.exe
4040	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	citizen.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
23	discord.com
24	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
11	ip-api.com

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
5092	cmd.exe
812	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4128	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
812	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
4184	citizen.exe
1820	powershell.exe
1820	powershell.exe
4680	powershell.exe
4680	powershell.exe
3192	powershell.exe
3192	powershell.exe
3884	powershell.exe
3884	powershell.exe
4040	powershell.exe
4040	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4184	citizen.exe
Token: SeIncreaseQuotaPrivilege	5008	wmic.exe
Token: SeSecurityPrivilege	5008	wmic.exe
Token: SeTakeOwnershipPrivilege	5008	wmic.exe
Token: SeLoadDriverPrivilege	5008	wmic.exe
Token: SeSystemProfilePrivilege	5008	wmic.exe
Token: SeSystemtimePrivilege	5008	wmic.exe
Token: SeProfSingleProcessPrivilege	5008	wmic.exe
Token: SeIncBasePriorityPrivilege	5008	wmic.exe
Token: SeCreatePagefilePrivilege	5008	wmic.exe
Token: SeBackupPrivilege	5008	wmic.exe
Token: SeRestorePrivilege	5008	wmic.exe
Token: SeShutdownPrivilege	5008	wmic.exe
Token: SeDebugPrivilege	5008	wmic.exe
Token: SeSystemEnvironmentPrivilege	5008	wmic.exe
Token: SeRemoteShutdownPrivilege	5008	wmic.exe
Token: SeUndockPrivilege	5008	wmic.exe
Token: SeManageVolumePrivilege	5008	wmic.exe
Token: 33	5008	wmic.exe
Token: 34	5008	wmic.exe
Token: 35	5008	wmic.exe
Token: 36	5008	wmic.exe
Token: SeIncreaseQuotaPrivilege	5008	wmic.exe
Token: SeSecurityPrivilege	5008	wmic.exe
Token: SeTakeOwnershipPrivilege	5008	wmic.exe
Token: SeLoadDriverPrivilege	5008	wmic.exe
Token: SeSystemProfilePrivilege	5008	wmic.exe
Token: SeSystemtimePrivilege	5008	wmic.exe
Token: SeProfSingleProcessPrivilege	5008	wmic.exe
Token: SeIncBasePriorityPrivilege	5008	wmic.exe
Token: SeCreatePagefilePrivilege	5008	wmic.exe
Token: SeBackupPrivilege	5008	wmic.exe
Token: SeRestorePrivilege	5008	wmic.exe
Token: SeShutdownPrivilege	5008	wmic.exe
Token: SeDebugPrivilege	5008	wmic.exe
Token: SeSystemEnvironmentPrivilege	5008	wmic.exe
Token: SeRemoteShutdownPrivilege	5008	wmic.exe
Token: SeUndockPrivilege	5008	wmic.exe
Token: SeManageVolumePrivilege	5008	wmic.exe
Token: 33	5008	wmic.exe
Token: 34	5008	wmic.exe
Token: 35	5008	wmic.exe
Token: 36	5008	wmic.exe
Token: SeDebugPrivilege	1820	powershell.exe
Token: SeDebugPrivilege	4680	powershell.exe
Token: SeDebugPrivilege	3192	powershell.exe
Token: SeDebugPrivilege	3884	powershell.exe
Token: SeIncreaseQuotaPrivilege	3228	wmic.exe
Token: SeSecurityPrivilege	3228	wmic.exe
Token: SeTakeOwnershipPrivilege	3228	wmic.exe
Token: SeLoadDriverPrivilege	3228	wmic.exe
Token: SeSystemProfilePrivilege	3228	wmic.exe
Token: SeSystemtimePrivilege	3228	wmic.exe
Token: SeProfSingleProcessPrivilege	3228	wmic.exe
Token: SeIncBasePriorityPrivilege	3228	wmic.exe
Token: SeCreatePagefilePrivilege	3228	wmic.exe
Token: SeBackupPrivilege	3228	wmic.exe
Token: SeRestorePrivilege	3228	wmic.exe
Token: SeShutdownPrivilege	3228	wmic.exe
Token: SeDebugPrivilege	3228	wmic.exe
Token: SeSystemEnvironmentPrivilege	3228	wmic.exe
Token: SeRemoteShutdownPrivilege	3228	wmic.exe
Token: SeUndockPrivilege	3228	wmic.exe
Token: SeManageVolumePrivilege	3228	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4184 wrote to memory of 5008	4184	citizen.exe	83
PID 4184 wrote to memory of 5008	4184	citizen.exe	83
PID 4184 wrote to memory of 1380	4184	citizen.exe	86
PID 4184 wrote to memory of 1380	4184	citizen.exe	86
PID 4184 wrote to memory of 1820	4184	citizen.exe	88
PID 4184 wrote to memory of 1820	4184	citizen.exe	88
PID 4184 wrote to memory of 4680	4184	citizen.exe	90
PID 4184 wrote to memory of 4680	4184	citizen.exe	90
PID 4184 wrote to memory of 3192	4184	citizen.exe	92
PID 4184 wrote to memory of 3192	4184	citizen.exe	92
PID 4184 wrote to memory of 3884	4184	citizen.exe	94
PID 4184 wrote to memory of 3884	4184	citizen.exe	94
PID 4184 wrote to memory of 3228	4184	citizen.exe	96
PID 4184 wrote to memory of 3228	4184	citizen.exe	96
PID 4184 wrote to memory of 3032	4184	citizen.exe	98
PID 4184 wrote to memory of 3032	4184	citizen.exe	98
PID 4184 wrote to memory of 4192	4184	citizen.exe	100
PID 4184 wrote to memory of 4192	4184	citizen.exe	100
PID 4184 wrote to memory of 4040	4184	citizen.exe	102
PID 4184 wrote to memory of 4040	4184	citizen.exe	102
PID 4184 wrote to memory of 4128	4184	citizen.exe	104
PID 4184 wrote to memory of 4128	4184	citizen.exe	104
PID 4184 wrote to memory of 5092	4184	citizen.exe	106
PID 4184 wrote to memory of 5092	4184	citizen.exe	106
PID 5092 wrote to memory of 812	5092	cmd.exe	108
PID 5092 wrote to memory of 812	5092	cmd.exe	108

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
1380	attrib.exe

C:\Users\Admin\AppData\Local\Temp\citizen.exe
"C:\Users\Admin\AppData\Local\Temp\citizen.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4184
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:5008
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\citizen.exe"
  2⤵
  - Views/modifies file attributes
  PID:1380
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\citizen.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1820
- 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:4680
- 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:3192
- 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:3884
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3228
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:3032
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4192
- 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:4040
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4128
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\citizen.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:5092
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:812

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

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

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
74a6b79d36b4aae8b027a218bc6e1af7

SHA1
0350e46c1df6934903c4820a00b0bc4721779e5f

SHA256
60c64f6803d7ad1408d0a8628100470859b16ef332d5f1bd8bb2debe51251d04

SHA512
60e71435a9a23f4c144d641844f4182ddc9aa4ccd3e99232149a187112dce96458aab9587e9fea46f5dc5a52f5ca758969a04657a2b5b10241d3e4554f7c85e0

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
6317adf4fbc43ea2fd68861fafd57155

SHA1
6b87c718893c83c6eed2767e8d9cbc6443e31913

SHA256
c1ead17eef37b4b461cedc276504a441489e819c7f943037f2001966aeec90af

SHA512
17229aae8622e4bfc3caaac55684f7d4ccd3162af5919c851b1d8ac4060b6bb7b75044ecee116523d05acb55197dcb60780958f629450edef386f1e6f65f49f0

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_se5r5wkt.w0q.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1820-13-0x000001FA23C20000-0x000001FA23C42000-memory.dmp

Filesize
136KB

Download
memory/1820-14-0x00007FFB39E20000-0x00007FFB3A8E1000-memory.dmp

Filesize
10.8MB

Download
memory/1820-15-0x00007FFB39E20000-0x00007FFB3A8E1000-memory.dmp

Filesize
10.8MB

Download
memory/1820-18-0x00007FFB39E20000-0x00007FFB3A8E1000-memory.dmp

Filesize
10.8MB

Download
memory/1820-3-0x00007FFB39E20000-0x00007FFB3A8E1000-memory.dmp

Filesize
10.8MB

Download
memory/4184-34-0x00000161EE3A0000-0x00000161EE3F0000-memory.dmp

Filesize
320KB

Download
memory/4184-33-0x00000161EE1A0000-0x00000161EE216000-memory.dmp

Filesize
472KB

Download
memory/4184-35-0x00000161EE180000-0x00000161EE19E000-memory.dmp

Filesize
120KB

Download
memory/4184-1-0x00000161EBBC0000-0x00000161EBC00000-memory.dmp

Filesize
256KB

Download
memory/4184-0-0x00007FFB39E23000-0x00007FFB39E25000-memory.dmp

Filesize
8KB

Download
memory/4184-73-0x00000161EE220000-0x00000161EE232000-memory.dmp

Filesize
72KB

Download
memory/4184-72-0x00000161EE140000-0x00000161EE14A000-memory.dmp

Filesize
40KB

Download
memory/4184-2-0x00007FFB39E20000-0x00007FFB3A8E1000-memory.dmp

Filesize
10.8MB

Download
memory/4184-93-0x00000161EE570000-0x00000161EE719000-memory.dmp

Filesize
1.7MB

Download
memory/4184-94-0x00007FFB39E20000-0x00007FFB3A8E1000-memory.dmp

Filesize
10.8MB

Download