umbral | 2576a8b91992cead33bc30b306852a6fbaa559fff89a534537495abe76aca3a2

Analysis

max time kernel
130s
max time network
100s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
05-06-2024 08:16

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General

Target

Umbral.exe
Size

227KB
MD5

53681862212e052e3c6b3e9ca9594428
SHA1

f89c700368b19d182062f673f9b51199e08c47cc
SHA256

2576a8b91992cead33bc30b306852a6fbaa559fff89a534537495abe76aca3a2
SHA512

2f9649751aeeabd4e59b7e172937518bb6867ce99eee00687243d6218edbdbc5d573a5cea36416131a3787360d215d557f91c75f480d30ce3d6bbd1152e81fa8
SSDEEP

6144:+loZM9rIkd8g+EtXHkv/iD4M6Q2nLxCqV0QhTuOLQjb8e1mui:ooZOL+EP8M6Q2nLxCqV0QhTuOLKY

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/2116-0-0x000001AD1A310000-0x000001AD1A350000-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
2092	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	Umbral.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
19	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
16	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
3380	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3532	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
2092	powershell.exe
2092	powershell.exe
1884	powershell.exe
1884	powershell.exe
1104	powershell.exe
1104	powershell.exe
2244	powershell.exe
2244	powershell.exe
684	powershell.exe
684	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2116	Umbral.exe
Token: SeDebugPrivilege	2092	powershell.exe
Token: SeDebugPrivilege	1884	powershell.exe
Token: SeDebugPrivilege	1104	powershell.exe
Token: SeDebugPrivilege	2244	powershell.exe
Token: SeIncreaseQuotaPrivilege	2256	wmic.exe
Token: SeSecurityPrivilege	2256	wmic.exe
Token: SeTakeOwnershipPrivilege	2256	wmic.exe
Token: SeLoadDriverPrivilege	2256	wmic.exe
Token: SeSystemProfilePrivilege	2256	wmic.exe
Token: SeSystemtimePrivilege	2256	wmic.exe
Token: SeProfSingleProcessPrivilege	2256	wmic.exe
Token: SeIncBasePriorityPrivilege	2256	wmic.exe
Token: SeCreatePagefilePrivilege	2256	wmic.exe
Token: SeBackupPrivilege	2256	wmic.exe
Token: SeRestorePrivilege	2256	wmic.exe
Token: SeShutdownPrivilege	2256	wmic.exe
Token: SeDebugPrivilege	2256	wmic.exe
Token: SeSystemEnvironmentPrivilege	2256	wmic.exe
Token: SeRemoteShutdownPrivilege	2256	wmic.exe
Token: SeUndockPrivilege	2256	wmic.exe
Token: SeManageVolumePrivilege	2256	wmic.exe
Token: 33	2256	wmic.exe
Token: 34	2256	wmic.exe
Token: 35	2256	wmic.exe
Token: 36	2256	wmic.exe
Token: SeIncreaseQuotaPrivilege	2256	wmic.exe
Token: SeSecurityPrivilege	2256	wmic.exe
Token: SeTakeOwnershipPrivilege	2256	wmic.exe
Token: SeLoadDriverPrivilege	2256	wmic.exe
Token: SeSystemProfilePrivilege	2256	wmic.exe
Token: SeSystemtimePrivilege	2256	wmic.exe
Token: SeProfSingleProcessPrivilege	2256	wmic.exe
Token: SeIncBasePriorityPrivilege	2256	wmic.exe
Token: SeCreatePagefilePrivilege	2256	wmic.exe
Token: SeBackupPrivilege	2256	wmic.exe
Token: SeRestorePrivilege	2256	wmic.exe
Token: SeShutdownPrivilege	2256	wmic.exe
Token: SeDebugPrivilege	2256	wmic.exe
Token: SeSystemEnvironmentPrivilege	2256	wmic.exe
Token: SeRemoteShutdownPrivilege	2256	wmic.exe
Token: SeUndockPrivilege	2256	wmic.exe
Token: SeManageVolumePrivilege	2256	wmic.exe
Token: 33	2256	wmic.exe
Token: 34	2256	wmic.exe
Token: 35	2256	wmic.exe
Token: 36	2256	wmic.exe
Token: SeIncreaseQuotaPrivilege	4220	wmic.exe
Token: SeSecurityPrivilege	4220	wmic.exe
Token: SeTakeOwnershipPrivilege	4220	wmic.exe
Token: SeLoadDriverPrivilege	4220	wmic.exe
Token: SeSystemProfilePrivilege	4220	wmic.exe
Token: SeSystemtimePrivilege	4220	wmic.exe
Token: SeProfSingleProcessPrivilege	4220	wmic.exe
Token: SeIncBasePriorityPrivilege	4220	wmic.exe
Token: SeCreatePagefilePrivilege	4220	wmic.exe
Token: SeBackupPrivilege	4220	wmic.exe
Token: SeRestorePrivilege	4220	wmic.exe
Token: SeShutdownPrivilege	4220	wmic.exe
Token: SeDebugPrivilege	4220	wmic.exe
Token: SeSystemEnvironmentPrivilege	4220	wmic.exe
Token: SeRemoteShutdownPrivilege	4220	wmic.exe
Token: SeUndockPrivilege	4220	wmic.exe
Token: SeManageVolumePrivilege	4220	wmic.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2116 wrote to memory of 4612	2116	Umbral.exe	85
PID 2116 wrote to memory of 4612	2116	Umbral.exe	85
PID 2116 wrote to memory of 2092	2116	Umbral.exe	87
PID 2116 wrote to memory of 2092	2116	Umbral.exe	87
PID 2116 wrote to memory of 1884	2116	Umbral.exe	90
PID 2116 wrote to memory of 1884	2116	Umbral.exe	90
PID 2116 wrote to memory of 1104	2116	Umbral.exe	93
PID 2116 wrote to memory of 1104	2116	Umbral.exe	93
PID 2116 wrote to memory of 2244	2116	Umbral.exe	95
PID 2116 wrote to memory of 2244	2116	Umbral.exe	95
PID 2116 wrote to memory of 2256	2116	Umbral.exe	98
PID 2116 wrote to memory of 2256	2116	Umbral.exe	98
PID 2116 wrote to memory of 4220	2116	Umbral.exe	101
PID 2116 wrote to memory of 4220	2116	Umbral.exe	101
PID 2116 wrote to memory of 2504	2116	Umbral.exe	103
PID 2116 wrote to memory of 2504	2116	Umbral.exe	103
PID 2116 wrote to memory of 684	2116	Umbral.exe	105
PID 2116 wrote to memory of 684	2116	Umbral.exe	105
PID 2116 wrote to memory of 3380	2116	Umbral.exe	107
PID 2116 wrote to memory of 3380	2116	Umbral.exe	107
PID 2116 wrote to memory of 3356	2116	Umbral.exe	111
PID 2116 wrote to memory of 3356	2116	Umbral.exe	111
PID 3356 wrote to memory of 3532	3356	cmd.exe	113
PID 3356 wrote to memory of 3532	3356	cmd.exe	113

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4612	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Umbral.exe
"C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2116
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:4612
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Umbral.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2092
- 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:1884
- 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:1104
- 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:2244
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2256
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4220
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2504
- 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:684
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:3380
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Umbral.exe" && pause
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3356
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:3532

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

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
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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
276798eeb29a49dc6e199768bc9c2e71

SHA1
5fdc8ccb897ac2df7476fbb07517aca5b7a6205b

SHA256
cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc

SHA512
0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2

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

Filesize
1KB

MD5
ec1ba4a995d866b282087b26a0539bbc

SHA1
c4aeae2bc3fa9a898680648b20102f01e8a811cf

SHA256
469da678c3c0364b1b511962cffd44cbfc10aab5c1c528c0c09fd952f08d8a2c

SHA512
07bf757ec9d0d368d3ef1bfc2b562895e2708757f8fefa04fa50beaa6fb38af1018ea0cfccf5666c5c8baa4c894deead9652c53e0608aa6a83ef5b396dba43e9

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ypfhfjr5.z1a.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2092-13-0x00000174DDAB0000-0x00000174DDAD2000-memory.dmp

Filesize
136KB

Download
memory/2092-14-0x00007FF99AA50000-0x00007FF99B511000-memory.dmp

Filesize
10.8MB

Download
memory/2092-15-0x00007FF99AA50000-0x00007FF99B511000-memory.dmp

Filesize
10.8MB

Download
memory/2092-18-0x00007FF99AA50000-0x00007FF99B511000-memory.dmp

Filesize
10.8MB

Download
memory/2092-8-0x00007FF99AA50000-0x00007FF99B511000-memory.dmp

Filesize
10.8MB

Download
memory/2116-34-0x000001AD34AC0000-0x000001AD34B10000-memory.dmp

Filesize
320KB

Download
memory/2116-33-0x000001AD34A40000-0x000001AD34AB6000-memory.dmp

Filesize
472KB

Download
memory/2116-35-0x000001AD349D0000-0x000001AD349EE000-memory.dmp

Filesize
120KB

Download
memory/2116-1-0x00007FF99AA53000-0x00007FF99AA55000-memory.dmp

Filesize
8KB

Download
memory/2116-0-0x000001AD1A310000-0x000001AD1A350000-memory.dmp

Filesize
256KB

Download
memory/2116-71-0x000001AD34A00000-0x000001AD34A0A000-memory.dmp

Filesize
40KB

Download
memory/2116-72-0x000001AD34B10000-0x000001AD34B22000-memory.dmp

Filesize
72KB

Download
memory/2116-2-0x00007FF99AA50000-0x00007FF99B511000-memory.dmp

Filesize
10.8MB

Download
memory/2116-90-0x00007FF99AA50000-0x00007FF99B511000-memory.dmp

Filesize
10.8MB

Download