umbral | dc179ef7f50e6aaa312f9aa992a397d014b2fbf219151d639cf4f98b6d2dbad4

Analysis

max time kernel
12s
max time network
13s
platform
windows10-2004_x64
resource
win10v2004-20240611-en
resource tags

arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
submitted
26-06-2024 07:05

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General

Target

Silence V2.exe
Size

1.4MB
MD5

b92e01644e5b593e8f0baa16b3ff9d01
SHA1

c09365ce18f7c0262ff1d5e673aac84741df7138
SHA256

56bfd3850d503982e6d3e0f7a48ac1252156a509e0054f414f0d678f64af50a7
SHA512

213bb3e16800a7f7fa78937c4015ce21e3854a90090ee9f7ef568131a6dde70016689e531dd2440314407dcd6d4c90cc36a2e6f3e2aceb07c89bf76a9c4c252c
SSDEEP

24576:6Oy0DmBXDJbwwZXTOas/C4betyp3SVJWX0o+0G+rcxIV0zMqmzXch:M0DmBXDtAt7Ky3SVEX0/0G+joMqmbc

Score

10^/10

umbral execution persistence spyware stealer

Malware Config

Extracted

Family

umbral

https://discord.com/api/webhooks/1242661037388468314/b-NP7qDhXngDoB6CdNXbSrZqZBdCUwxa5k7R0G43X2NEHvaGtjHVsZ3e2VkStAGOjujz

Signatures

Detect Umbral payload 2 IoCs

resource	yara_rule
behavioral2/files/0x000700000002342f-8.dat	family_umbral
behavioral2/memory/860-11-0x0000018DEE7F0000-0x0000018DEE830000-memory.dmp	family_umbral

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

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

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

execution

PowerShell

T1059.001

pid	Process
4344	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
436	SILENC~1.EXE
860	Discord.exe

Reads user/profile data of web browsers 2 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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\wextract_cleanup0 = "rundll32.exe C:\\Windows\\system32\\advpack.dll,DelNodeRunDLL32 \"C:\\Users\\Admin\\AppData\\Local\\Temp\\IXP000.TMP\\\""	Silence V2.exe

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

Web Service

T1102

flow	ioc
33	discord.com
34	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
2948	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4344	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
860	Discord.exe
4344	powershell.exe
4344	powershell.exe
1080	powershell.exe
1080	powershell.exe
3392	powershell.exe
3392	powershell.exe
2420	powershell.exe
2420	powershell.exe
2188	powershell.exe
2188	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	860	Discord.exe
Token: SeIncreaseQuotaPrivilege	3284	wmic.exe
Token: SeSecurityPrivilege	3284	wmic.exe
Token: SeTakeOwnershipPrivilege	3284	wmic.exe
Token: SeLoadDriverPrivilege	3284	wmic.exe
Token: SeSystemProfilePrivilege	3284	wmic.exe
Token: SeSystemtimePrivilege	3284	wmic.exe
Token: SeProfSingleProcessPrivilege	3284	wmic.exe
Token: SeIncBasePriorityPrivilege	3284	wmic.exe
Token: SeCreatePagefilePrivilege	3284	wmic.exe
Token: SeBackupPrivilege	3284	wmic.exe
Token: SeRestorePrivilege	3284	wmic.exe
Token: SeShutdownPrivilege	3284	wmic.exe
Token: SeDebugPrivilege	3284	wmic.exe
Token: SeSystemEnvironmentPrivilege	3284	wmic.exe
Token: SeRemoteShutdownPrivilege	3284	wmic.exe
Token: SeUndockPrivilege	3284	wmic.exe
Token: SeManageVolumePrivilege	3284	wmic.exe
Token: 33	3284	wmic.exe
Token: 34	3284	wmic.exe
Token: 35	3284	wmic.exe
Token: 36	3284	wmic.exe
Token: SeIncreaseQuotaPrivilege	3284	wmic.exe
Token: SeSecurityPrivilege	3284	wmic.exe
Token: SeTakeOwnershipPrivilege	3284	wmic.exe
Token: SeLoadDriverPrivilege	3284	wmic.exe
Token: SeSystemProfilePrivilege	3284	wmic.exe
Token: SeSystemtimePrivilege	3284	wmic.exe
Token: SeProfSingleProcessPrivilege	3284	wmic.exe
Token: SeIncBasePriorityPrivilege	3284	wmic.exe
Token: SeCreatePagefilePrivilege	3284	wmic.exe
Token: SeBackupPrivilege	3284	wmic.exe
Token: SeRestorePrivilege	3284	wmic.exe
Token: SeShutdownPrivilege	3284	wmic.exe
Token: SeDebugPrivilege	3284	wmic.exe
Token: SeSystemEnvironmentPrivilege	3284	wmic.exe
Token: SeRemoteShutdownPrivilege	3284	wmic.exe
Token: SeUndockPrivilege	3284	wmic.exe
Token: SeManageVolumePrivilege	3284	wmic.exe
Token: 33	3284	wmic.exe
Token: 34	3284	wmic.exe
Token: 35	3284	wmic.exe
Token: 36	3284	wmic.exe
Token: SeDebugPrivilege	4344	powershell.exe
Token: SeDebugPrivilege	1080	powershell.exe
Token: SeDebugPrivilege	3392	powershell.exe
Token: SeDebugPrivilege	2420	powershell.exe
Token: SeIncreaseQuotaPrivilege	5032	wmic.exe
Token: SeSecurityPrivilege	5032	wmic.exe
Token: SeTakeOwnershipPrivilege	5032	wmic.exe
Token: SeLoadDriverPrivilege	5032	wmic.exe
Token: SeSystemProfilePrivilege	5032	wmic.exe
Token: SeSystemtimePrivilege	5032	wmic.exe
Token: SeProfSingleProcessPrivilege	5032	wmic.exe
Token: SeIncBasePriorityPrivilege	5032	wmic.exe
Token: SeCreatePagefilePrivilege	5032	wmic.exe
Token: SeBackupPrivilege	5032	wmic.exe
Token: SeRestorePrivilege	5032	wmic.exe
Token: SeShutdownPrivilege	5032	wmic.exe
Token: SeDebugPrivilege	5032	wmic.exe
Token: SeSystemEnvironmentPrivilege	5032	wmic.exe
Token: SeRemoteShutdownPrivilege	5032	wmic.exe
Token: SeUndockPrivilege	5032	wmic.exe
Token: SeManageVolumePrivilege	5032	wmic.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 3512 wrote to memory of 436	3512	Silence V2.exe	82
PID 3512 wrote to memory of 436	3512	Silence V2.exe	82
PID 3512 wrote to memory of 860	3512	Silence V2.exe	84
PID 3512 wrote to memory of 860	3512	Silence V2.exe	84
PID 860 wrote to memory of 3284	860	Discord.exe	86
PID 860 wrote to memory of 3284	860	Discord.exe	86
PID 860 wrote to memory of 5076	860	Discord.exe	91
PID 860 wrote to memory of 5076	860	Discord.exe	91
PID 860 wrote to memory of 4344	860	Discord.exe	93
PID 860 wrote to memory of 4344	860	Discord.exe	93
PID 860 wrote to memory of 1080	860	Discord.exe	95
PID 860 wrote to memory of 1080	860	Discord.exe	95
PID 860 wrote to memory of 3392	860	Discord.exe	97
PID 860 wrote to memory of 3392	860	Discord.exe	97
PID 860 wrote to memory of 2420	860	Discord.exe	99
PID 860 wrote to memory of 2420	860	Discord.exe	99
PID 860 wrote to memory of 5032	860	Discord.exe	103
PID 860 wrote to memory of 5032	860	Discord.exe	103
PID 860 wrote to memory of 2660	860	Discord.exe	105
PID 860 wrote to memory of 2660	860	Discord.exe	105
PID 860 wrote to memory of 4420	860	Discord.exe	107
PID 860 wrote to memory of 4420	860	Discord.exe	107
PID 860 wrote to memory of 2188	860	Discord.exe	109
PID 860 wrote to memory of 2188	860	Discord.exe	109
PID 860 wrote to memory of 2948	860	Discord.exe	111
PID 860 wrote to memory of 2948	860	Discord.exe	111
PID 860 wrote to memory of 2176	860	Discord.exe	114
PID 860 wrote to memory of 2176	860	Discord.exe	114
PID 2176 wrote to memory of 4344	2176	cmd.exe	116
PID 2176 wrote to memory of 4344	2176	cmd.exe	116

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
5076	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Silence V2.exe
"C:\Users\Admin\AppData\Local\Temp\Silence V2.exe"
1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:3512
- C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\SILENC~1.EXE
  C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\SILENC~1.EXE
  2⤵
  - Executes dropped EXE
  PID:436
- C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\Discord.exe
  C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\Discord.exe
  2⤵
  - Drops file in Drivers directory
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:860
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:3284
- - C:\Windows\SYSTEM32\attrib.exe
    "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\Discord.exe"
    3⤵
    - Views/modifies file attributes
    PID:5076
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\Discord.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4344
- - 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⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1080
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3392
- - 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:2420
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" os get Caption
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:5032
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" computersystem get totalphysicalmemory
    3⤵
    PID:2660
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    PID:4420
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:2188
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic" path win32_VideoController get name
    3⤵
    - Detects videocard installed
    PID:2948
- - C:\Windows\SYSTEM32\cmd.exe
    "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\Discord.exe" && pause
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2176
  - - C:\Windows\system32\PING.EXE
      ping localhost
      4⤵
      Runs ping.exe
      PID:4344

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Remote System Discovery

T1018

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
6d42b6da621e8df5674e26b799c8e2aa

SHA1
ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

SHA256
5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

SHA512
53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

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

Filesize
948B

MD5
966914e2e771de7a4a57a95b6ecfa8a9

SHA1
7a32282fd51dd032967ed4d9a40cc57e265aeff2

SHA256
98d3c70d7004fa807897317bd6cd3e977b9b6c72d4d2565aca0f9f8b1c315cba

SHA512
dc39c7124a9c7c8d4c7e8e16290c46360b8d9a8f4e43edaacbbeb09bdcf20159a53db54d2b322372001b6a3de52b2f88e9088b5fdbc7638816ae0d122bb015f5

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

Filesize
1KB

MD5
548dd08570d121a65e82abb7171cae1c

SHA1
1a1b5084b3a78f3acd0d811cc79dbcac121217ab

SHA256
cdf17b8532ebcebac3cfe23954a30aa32edd268d040da79c82687e4ccb044adc

SHA512
37b98b09178b51eec9599af90d027d2f1028202efc1633047e16e41f1a95610984af5620baac07db085ccfcb96942aafffad17aa1f44f63233e83869dc9f697b

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

Filesize
1KB

MD5
b5e2fd95470c50743ba121fd6bd03a7b

SHA1
75545ed499d9dde51a1fc1cf535eb4f50ec79250

SHA256
d9c961aaf784b9ce81b0a3aac7a39bd41e9f2702d9c28deb20e786d385b88288

SHA512
76bdc793f8b38f603b5ad0957474660bb09e963a2496564b8ceac6591d532fc9498214b81c3908bafc13ff0b07028457c6c997998adfd2203304cb1c82899423

Download Submit
C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\Discord.exe

Filesize
227KB

MD5
76c5e8fd03ce0b5a961b5223ce3285ba

SHA1
c4e7128c9bad0414de8e29581347134504c06d76

SHA256
b9a0ae4a08f4607671b4078a06a9b0b20bb5785835542fc795751842afa45638

SHA512
1d1ae0a49bd1933f53a78a07fd291bb3479fde212c1c7fd8274576bedaaafc9ecc09703941ee96f9e008f8e543affbdb999f73332489455e0a63987047cbc81a

Download Submit
C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\SILENC~1.EXE

Filesize
2.2MB

MD5
62d1385a94be14ac023001ac2fe31aca

SHA1
c82aea0d4f592ed2889e6bfe1ff267b46da65efc

SHA256
40274d0aef0b5426aa0be739faa121862aeb1af18559d05d2830dd4c415a0008

SHA512
1703bd4088996008ad44ad63caff5528b5657f2c259cced5c5862df355b05673cedd9ca718ef637cf96320e7a3ec6a98ff0ba469f4f0dde18978de3cfd7b6329

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_sx0julpj.rtj.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/860-10-0x00007FFCEB123000-0x00007FFCEB125000-memory.dmp

Filesize
8KB

Download
memory/860-39-0x0000018DF0FB0000-0x0000018DF1026000-memory.dmp

Filesize
472KB

Download
memory/860-40-0x0000018DF04B0000-0x0000018DF0500000-memory.dmp

Filesize
320KB

Download
memory/860-41-0x0000018DF0460000-0x0000018DF047E000-memory.dmp

Filesize
120KB

Download
memory/860-11-0x0000018DEE7F0000-0x0000018DEE830000-memory.dmp

Filesize
256KB

Download
memory/860-78-0x0000018DF0500000-0x0000018DF050A000-memory.dmp

Filesize
40KB

Download
memory/860-79-0x0000018DF0E50000-0x0000018DF0E62000-memory.dmp

Filesize
72KB

Download
memory/860-12-0x00007FFCEB120000-0x00007FFCEBBE1000-memory.dmp

Filesize
10.8MB

Download
memory/860-99-0x00007FFCEB120000-0x00007FFCEBBE1000-memory.dmp

Filesize
10.8MB

Download
memory/4344-13-0x0000022FC2C00000-0x0000022FC2C22000-memory.dmp

Filesize
136KB

Download