umbral | b9d84636a9359f58b03287d8e8db195c45d6557b02f657073144707db483f001

Resubmissions

29-06-2024 16:53

240629-vd8x8s1fqg 10

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240611-en
resource tags

arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
submitted
29-06-2024 16:53

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General

Target

DLL Injector.exe
Size

232KB
MD5

3e87aa76b31c95481d99fb7960ce96f4
SHA1

bcd61df3abd7245df27a250996138675b258f01e
SHA256

8c18bb102c70d83000ae6d6f784da47b86a78359b2e6edfbfe915cb16ccb9a2a
SHA512

574d79517027edd422d857272d8a14d751c0b64851e2bd0cf6a698a56284a0b17783a209d405d09542b4c3fc044af2b02304293d4522a169cde8da684350c6dc
SSDEEP

6144:8loZMLrIkd8g+EtXHkv/iD4rPS0pbhS6F6AxDeebfHb8e1mo5iH/:aoZ0L+EP8rPS0pbhS6F6AxDeebLGH/

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral6/memory/3868-0-0x00000216B5CB0000-0x00000216B5CF0000-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
428	powershell.exe

Drops file in Drivers directory 1 IoCs

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

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

Web Service

T1102

flow	ioc
21	discord.com
23	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
4	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2292	wmic.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
3868	DLL Injector.exe
428	powershell.exe
428	powershell.exe
2216	powershell.exe
2216	powershell.exe
1536	powershell.exe
1536	powershell.exe
4032	powershell.exe
4032	powershell.exe
4340	powershell.exe
4340	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3868	DLL Injector.exe
Token: SeIncreaseQuotaPrivilege	3652	wmic.exe
Token: SeSecurityPrivilege	3652	wmic.exe
Token: SeTakeOwnershipPrivilege	3652	wmic.exe
Token: SeLoadDriverPrivilege	3652	wmic.exe
Token: SeSystemProfilePrivilege	3652	wmic.exe
Token: SeSystemtimePrivilege	3652	wmic.exe
Token: SeProfSingleProcessPrivilege	3652	wmic.exe
Token: SeIncBasePriorityPrivilege	3652	wmic.exe
Token: SeCreatePagefilePrivilege	3652	wmic.exe
Token: SeBackupPrivilege	3652	wmic.exe
Token: SeRestorePrivilege	3652	wmic.exe
Token: SeShutdownPrivilege	3652	wmic.exe
Token: SeDebugPrivilege	3652	wmic.exe
Token: SeSystemEnvironmentPrivilege	3652	wmic.exe
Token: SeRemoteShutdownPrivilege	3652	wmic.exe
Token: SeUndockPrivilege	3652	wmic.exe
Token: SeManageVolumePrivilege	3652	wmic.exe
Token: 33	3652	wmic.exe
Token: 34	3652	wmic.exe
Token: 35	3652	wmic.exe
Token: 36	3652	wmic.exe
Token: SeIncreaseQuotaPrivilege	3652	wmic.exe
Token: SeSecurityPrivilege	3652	wmic.exe
Token: SeTakeOwnershipPrivilege	3652	wmic.exe
Token: SeLoadDriverPrivilege	3652	wmic.exe
Token: SeSystemProfilePrivilege	3652	wmic.exe
Token: SeSystemtimePrivilege	3652	wmic.exe
Token: SeProfSingleProcessPrivilege	3652	wmic.exe
Token: SeIncBasePriorityPrivilege	3652	wmic.exe
Token: SeCreatePagefilePrivilege	3652	wmic.exe
Token: SeBackupPrivilege	3652	wmic.exe
Token: SeRestorePrivilege	3652	wmic.exe
Token: SeShutdownPrivilege	3652	wmic.exe
Token: SeDebugPrivilege	3652	wmic.exe
Token: SeSystemEnvironmentPrivilege	3652	wmic.exe
Token: SeRemoteShutdownPrivilege	3652	wmic.exe
Token: SeUndockPrivilege	3652	wmic.exe
Token: SeManageVolumePrivilege	3652	wmic.exe
Token: 33	3652	wmic.exe
Token: 34	3652	wmic.exe
Token: 35	3652	wmic.exe
Token: 36	3652	wmic.exe
Token: SeDebugPrivilege	428	powershell.exe
Token: SeDebugPrivilege	2216	powershell.exe
Token: SeDebugPrivilege	1536	powershell.exe
Token: SeDebugPrivilege	4032	powershell.exe
Token: SeIncreaseQuotaPrivilege	4612	wmic.exe
Token: SeSecurityPrivilege	4612	wmic.exe
Token: SeTakeOwnershipPrivilege	4612	wmic.exe
Token: SeLoadDriverPrivilege	4612	wmic.exe
Token: SeSystemProfilePrivilege	4612	wmic.exe
Token: SeSystemtimePrivilege	4612	wmic.exe
Token: SeProfSingleProcessPrivilege	4612	wmic.exe
Token: SeIncBasePriorityPrivilege	4612	wmic.exe
Token: SeCreatePagefilePrivilege	4612	wmic.exe
Token: SeBackupPrivilege	4612	wmic.exe
Token: SeRestorePrivilege	4612	wmic.exe
Token: SeShutdownPrivilege	4612	wmic.exe
Token: SeDebugPrivilege	4612	wmic.exe
Token: SeSystemEnvironmentPrivilege	4612	wmic.exe
Token: SeRemoteShutdownPrivilege	4612	wmic.exe
Token: SeUndockPrivilege	4612	wmic.exe
Token: SeManageVolumePrivilege	4612	wmic.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 3868 wrote to memory of 3652	3868	DLL Injector.exe	83
PID 3868 wrote to memory of 3652	3868	DLL Injector.exe	83
PID 3868 wrote to memory of 428	3868	DLL Injector.exe	88
PID 3868 wrote to memory of 428	3868	DLL Injector.exe	88
PID 3868 wrote to memory of 2216	3868	DLL Injector.exe	91
PID 3868 wrote to memory of 2216	3868	DLL Injector.exe	91
PID 3868 wrote to memory of 1536	3868	DLL Injector.exe	93
PID 3868 wrote to memory of 1536	3868	DLL Injector.exe	93
PID 3868 wrote to memory of 4032	3868	DLL Injector.exe	96
PID 3868 wrote to memory of 4032	3868	DLL Injector.exe	96
PID 3868 wrote to memory of 4612	3868	DLL Injector.exe	98
PID 3868 wrote to memory of 4612	3868	DLL Injector.exe	98
PID 3868 wrote to memory of 4044	3868	DLL Injector.exe	100
PID 3868 wrote to memory of 4044	3868	DLL Injector.exe	100
PID 3868 wrote to memory of 3488	3868	DLL Injector.exe	102
PID 3868 wrote to memory of 3488	3868	DLL Injector.exe	102
PID 3868 wrote to memory of 4340	3868	DLL Injector.exe	104
PID 3868 wrote to memory of 4340	3868	DLL Injector.exe	104
PID 3868 wrote to memory of 2292	3868	DLL Injector.exe	106
PID 3868 wrote to memory of 2292	3868	DLL Injector.exe	106

C:\Users\Admin\AppData\Local\Temp\DLL Injector.exe
"C:\Users\Admin\AppData\Local\Temp\DLL Injector.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3868
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3652
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\DLL Injector.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:428
- 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⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2216
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1536
- 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:4032
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4612
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:4044
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3488
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:4340
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2292

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

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

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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
324281203878a7160218842869007fe3

SHA1
08b20937163c91bd2e67f6be17701a79d5c5f171

SHA256
6a931d902d3af1d40e76ad08b5a35c82598eeda7b205afca6316f5a2acd0a336

SHA512
7bd210fffbc93af3937295531bae3ff45736909657a5b644fbb30ae89176a5b59098f40c2310f3b3784c8e5ef4edb3862e96ef4de000b183303b8f220acb8666

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

Filesize
1KB

MD5
d3235ed022a42ec4338123ab87144afa

SHA1
5058608bc0deb720a585a2304a8f7cf63a50a315

SHA256
10663f5a1cb0afe5578f61ebaae2aafb363544e47b48521f9c23be9e6e431b27

SHA512
236761b7c68feca8bd62cba90cff0b25fac5613837aaa5d29ae823ace8b06a2057553cf7e72b11ccc59b6c289e471ca1bbac1a880aef5e2868875371a17c1abf

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_jzhig4xg.pfg.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/428-13-0x00007FFB65F30000-0x00007FFB669F1000-memory.dmp

Filesize
10.8MB

Download
memory/428-14-0x000002937A2F0000-0x000002937A312000-memory.dmp

Filesize
136KB

Download
memory/428-15-0x00007FFB65F30000-0x00007FFB669F1000-memory.dmp

Filesize
10.8MB

Download
memory/428-18-0x00007FFB65F30000-0x00007FFB669F1000-memory.dmp

Filesize
10.8MB

Download
memory/428-3-0x00007FFB65F30000-0x00007FFB669F1000-memory.dmp

Filesize
10.8MB

Download
memory/3868-34-0x00000216D04B0000-0x00000216D0500000-memory.dmp

Filesize
320KB

Download
memory/3868-33-0x00000216D03E0000-0x00000216D0456000-memory.dmp

Filesize
472KB

Download
memory/3868-35-0x00000216D0380000-0x00000216D039E000-memory.dmp

Filesize
120KB

Download
memory/3868-1-0x00007FFB65F33000-0x00007FFB65F35000-memory.dmp

Filesize
8KB

Download
memory/3868-0-0x00000216B5CB0000-0x00000216B5CF0000-memory.dmp

Filesize
256KB

Download
memory/3868-72-0x00000216D03A0000-0x00000216D03AA000-memory.dmp

Filesize
40KB

Download
memory/3868-73-0x00000216D0460000-0x00000216D0472000-memory.dmp

Filesize
72KB

Download
memory/3868-2-0x00007FFB65F30000-0x00007FFB669F1000-memory.dmp

Filesize
10.8MB

Download
memory/3868-93-0x00007FFB65F30000-0x00007FFB669F1000-memory.dmp

Filesize
10.8MB

Download