umbral | ee7e7ac852c19524db20655a03bffdbcc34a26771fd3bbee1aa7b9c25e0e16b1

Analysis

max time kernel
98s
max time network
142s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241211-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241211-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
22-12-2024 18:22

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General

Target

citizen.exe
Size

229KB
MD5

fdb0b8617cf84e37b6eb3d7d33fb2bc4
SHA1

57d7ec3221470c30aaebd8c76a55daef900bfd07
SHA256

ee7e7ac852c19524db20655a03bffdbcc34a26771fd3bbee1aa7b9c25e0e16b1
SHA512

1f6d657bf33b08fae291b857e21055a3c3e2398d4b6d42ff764c9f95949441af79bf18a2602af0a7568eeccd0e5d47311c1838200e5ae2111b36176326e457fe
SSDEEP

6144:lloZM+rIkd8g+EtXHkv/iD4n9w7U69VeAbGkFZwQZb8e1mRhMi:noZtL+EP8n9w7U69VeAbGkFZwgO

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/4728-1-0x0000018AF5E70000-0x0000018AF5EB0000-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

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
4796	powershell.exe
3760	powershell.exe
2864	powershell.exe
4648	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
22	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

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
5088	cmd.exe
4892	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
784	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4892	PING.EXE

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
2988	wmic.exe
2988	wmic.exe
2988	wmic.exe
2988	wmic.exe
4728	citizen.exe
4648	powershell.exe
4648	powershell.exe
4796	powershell.exe
4796	powershell.exe
3760	powershell.exe
3760	powershell.exe
1836	powershell.exe
1836	powershell.exe
4004	wmic.exe
4004	wmic.exe
4004	wmic.exe
4004	wmic.exe
1516	wmic.exe
1516	wmic.exe
1516	wmic.exe
1516	wmic.exe
4408	wmic.exe
4408	wmic.exe
4408	wmic.exe
4408	wmic.exe
2864	powershell.exe
2864	powershell.exe
784	wmic.exe
784	wmic.exe
784	wmic.exe
784	wmic.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4728	citizen.exe
Token: SeIncreaseQuotaPrivilege	2988	wmic.exe
Token: SeSecurityPrivilege	2988	wmic.exe
Token: SeTakeOwnershipPrivilege	2988	wmic.exe
Token: SeLoadDriverPrivilege	2988	wmic.exe
Token: SeSystemProfilePrivilege	2988	wmic.exe
Token: SeSystemtimePrivilege	2988	wmic.exe
Token: SeProfSingleProcessPrivilege	2988	wmic.exe
Token: SeIncBasePriorityPrivilege	2988	wmic.exe
Token: SeCreatePagefilePrivilege	2988	wmic.exe
Token: SeBackupPrivilege	2988	wmic.exe
Token: SeRestorePrivilege	2988	wmic.exe
Token: SeShutdownPrivilege	2988	wmic.exe
Token: SeDebugPrivilege	2988	wmic.exe
Token: SeSystemEnvironmentPrivilege	2988	wmic.exe
Token: SeRemoteShutdownPrivilege	2988	wmic.exe
Token: SeUndockPrivilege	2988	wmic.exe
Token: SeManageVolumePrivilege	2988	wmic.exe
Token: 33	2988	wmic.exe
Token: 34	2988	wmic.exe
Token: 35	2988	wmic.exe
Token: 36	2988	wmic.exe
Token: SeIncreaseQuotaPrivilege	2988	wmic.exe
Token: SeSecurityPrivilege	2988	wmic.exe
Token: SeTakeOwnershipPrivilege	2988	wmic.exe
Token: SeLoadDriverPrivilege	2988	wmic.exe
Token: SeSystemProfilePrivilege	2988	wmic.exe
Token: SeSystemtimePrivilege	2988	wmic.exe
Token: SeProfSingleProcessPrivilege	2988	wmic.exe
Token: SeIncBasePriorityPrivilege	2988	wmic.exe
Token: SeCreatePagefilePrivilege	2988	wmic.exe
Token: SeBackupPrivilege	2988	wmic.exe
Token: SeRestorePrivilege	2988	wmic.exe
Token: SeShutdownPrivilege	2988	wmic.exe
Token: SeDebugPrivilege	2988	wmic.exe
Token: SeSystemEnvironmentPrivilege	2988	wmic.exe
Token: SeRemoteShutdownPrivilege	2988	wmic.exe
Token: SeUndockPrivilege	2988	wmic.exe
Token: SeManageVolumePrivilege	2988	wmic.exe
Token: 33	2988	wmic.exe
Token: 34	2988	wmic.exe
Token: 35	2988	wmic.exe
Token: 36	2988	wmic.exe
Token: SeDebugPrivilege	4648	powershell.exe
Token: SeIncreaseQuotaPrivilege	4648	powershell.exe
Token: SeSecurityPrivilege	4648	powershell.exe
Token: SeTakeOwnershipPrivilege	4648	powershell.exe
Token: SeLoadDriverPrivilege	4648	powershell.exe
Token: SeSystemProfilePrivilege	4648	powershell.exe
Token: SeSystemtimePrivilege	4648	powershell.exe
Token: SeProfSingleProcessPrivilege	4648	powershell.exe
Token: SeIncBasePriorityPrivilege	4648	powershell.exe
Token: SeCreatePagefilePrivilege	4648	powershell.exe
Token: SeBackupPrivilege	4648	powershell.exe
Token: SeRestorePrivilege	4648	powershell.exe
Token: SeShutdownPrivilege	4648	powershell.exe
Token: SeDebugPrivilege	4648	powershell.exe
Token: SeSystemEnvironmentPrivilege	4648	powershell.exe
Token: SeRemoteShutdownPrivilege	4648	powershell.exe
Token: SeUndockPrivilege	4648	powershell.exe
Token: SeManageVolumePrivilege	4648	powershell.exe
Token: 33	4648	powershell.exe
Token: 34	4648	powershell.exe
Token: 35	4648	powershell.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4728 wrote to memory of 2988	4728	citizen.exe	82
PID 4728 wrote to memory of 2988	4728	citizen.exe	82
PID 4728 wrote to memory of 2480	4728	citizen.exe	85
PID 4728 wrote to memory of 2480	4728	citizen.exe	85
PID 4728 wrote to memory of 4648	4728	citizen.exe	87
PID 4728 wrote to memory of 4648	4728	citizen.exe	87
PID 4728 wrote to memory of 4796	4728	citizen.exe	91
PID 4728 wrote to memory of 4796	4728	citizen.exe	91
PID 4728 wrote to memory of 3760	4728	citizen.exe	95
PID 4728 wrote to memory of 3760	4728	citizen.exe	95
PID 4728 wrote to memory of 1836	4728	citizen.exe	97
PID 4728 wrote to memory of 1836	4728	citizen.exe	97
PID 4728 wrote to memory of 4004	4728	citizen.exe	100
PID 4728 wrote to memory of 4004	4728	citizen.exe	100
PID 4728 wrote to memory of 1516	4728	citizen.exe	102
PID 4728 wrote to memory of 1516	4728	citizen.exe	102
PID 4728 wrote to memory of 4408	4728	citizen.exe	104
PID 4728 wrote to memory of 4408	4728	citizen.exe	104
PID 4728 wrote to memory of 2864	4728	citizen.exe	106
PID 4728 wrote to memory of 2864	4728	citizen.exe	106
PID 4728 wrote to memory of 784	4728	citizen.exe	108
PID 4728 wrote to memory of 784	4728	citizen.exe	108
PID 4728 wrote to memory of 5088	4728	citizen.exe	110
PID 4728 wrote to memory of 5088	4728	citizen.exe	110
PID 5088 wrote to memory of 4892	5088	cmd.exe	112
PID 5088 wrote to memory of 4892	5088	cmd.exe	112

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2480	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:4728
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2988
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\citizen.exe"
  2⤵
  - Views/modifies file attributes
  PID:2480
- 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:4648
- 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
  PID:4796
- 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
  PID:3760
- 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
  PID:1836
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:4004
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:1516
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:4408
- 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:2864
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  - Suspicious behavior: EnumeratesProcesses
  PID:784
- 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:5088
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:4892

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
3KB

MD5
3eb3833f769dd890afc295b977eab4b4

SHA1
e857649b037939602c72ad003e5d3698695f436f

SHA256
c485a6e2fd17c342fca60060f47d6a5655a65a412e35e001bb5bf88d96e6e485

SHA512
c24bbc8f278478d43756807b8c584d4e3fb2289db468bc92986a489f74a8da386a667a758360a397e77e018e363be8912ac260072fa3e31117ad0599ac749e72

Download Submit
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
e54c87c0cf41e037843c0683b140dd0c

SHA1
637d4c536731e621c566e734465a2d92f56ea2d2

SHA256
eaf786595c995423e00ba14677822d43cbaefd26976ada9a3425069b0129c76e

SHA512
453841bdd6b730be8b2ce8db4881a3212d8dcd54bb44d591bb4840f82f821be518594c991ecf058784f66f987328c00aca5020bb98b572e731f959e4a8a82fbb

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
43af66a28ed429a2af161d8a222cc4eb

SHA1
49f185e99c50b1f8e4dc3ae7a093dca2b0e3e523

SHA256
b3374a3cf49099885c8f32504c1a1e7644526686580762aff22ebe143d809025

SHA512
5dac23a6b9058ec07ec1a4fac12f96d722b8b9bd4ad84fdeba8f4645a47a92d749f9fe55a9a555f44272b86b7b2e0ea123531d493b291996f536ef338f83404a

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_jkpx5llq.u3f.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/4648-4-0x00007FF99F5E0000-0x00007FF9A00A2000-memory.dmp

Filesize
10.8MB

Download
memory/4648-17-0x00007FF99F5E0000-0x00007FF9A00A2000-memory.dmp

Filesize
10.8MB

Download
memory/4648-6-0x000002174F130000-0x000002174F152000-memory.dmp

Filesize
136KB

Download
memory/4648-3-0x00007FF99F5E0000-0x00007FF9A00A2000-memory.dmp

Filesize
10.8MB

Download
memory/4728-0-0x00007FF99F5E3000-0x00007FF99F5E5000-memory.dmp

Filesize
8KB

Download
memory/4728-31-0x0000018AF8610000-0x0000018AF8686000-memory.dmp

Filesize
472KB

Download
memory/4728-32-0x0000018AF8590000-0x0000018AF85E0000-memory.dmp

Filesize
320KB

Download
memory/4728-33-0x0000018AF8450000-0x0000018AF846E000-memory.dmp

Filesize
120KB

Download
memory/4728-2-0x00007FF99F5E0000-0x00007FF9A00A2000-memory.dmp

Filesize
10.8MB

Download
memory/4728-57-0x0000018AF7C20000-0x0000018AF7C2A000-memory.dmp

Filesize
40KB

Download
memory/4728-58-0x0000018AF8690000-0x0000018AF86A2000-memory.dmp

Filesize
72KB

Download
memory/4728-1-0x0000018AF5E70000-0x0000018AF5EB0000-memory.dmp

Filesize
256KB

Download
memory/4728-76-0x00007FF99F5E0000-0x00007FF9A00A2000-memory.dmp

Filesize
10.8MB

Download