umbral | e15b1ff3eb180023710277f71246a22b705ff26a4826789a004b77137df5d30d

Analysis

max time kernel
143s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20230703-en
resource tags

arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
submitted
21-08-2023 01:11

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General

Target

Umbral.exe
Size

228KB
MD5

18035d182c38cd4bdac10b181d956b32
SHA1

7a024ccc6625b4c232064cff47dc52b3d3efe4fe
SHA256

e15b1ff3eb180023710277f71246a22b705ff26a4826789a004b77137df5d30d
SHA512

9cd6c414a15ae3cf89756f081e464c5e8ecf2951dd546a7930d88d31abb48ce37ba263ad18d0c3cdb74090ce0f85847d6747c183b61274c43f9f9f445a077566
SSDEEP

6144:kloZMIrIkd8g+EtXHkv/iD4LQ1DjpaC9uop7mGzuib8e1mBi:CoZnL+EP8LQ1DjpaC9uop7mGzhj

Score

10^/10

umbral stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/876-133-0x000001FFB29A0000-0x000001FFB29E0000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral
Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102

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
15	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
584	wmic.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2788	powershell.exe
2788	powershell.exe
2480	powershell.exe
2480	powershell.exe
1904	powershell.exe
1904	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	876	Umbral.exe
Token: SeDebugPrivilege	2788	powershell.exe
Token: SeDebugPrivilege	2480	powershell.exe
Token: SeIncreaseQuotaPrivilege	3748	wmic.exe
Token: SeSecurityPrivilege	3748	wmic.exe
Token: SeTakeOwnershipPrivilege	3748	wmic.exe
Token: SeLoadDriverPrivilege	3748	wmic.exe
Token: SeSystemProfilePrivilege	3748	wmic.exe
Token: SeSystemtimePrivilege	3748	wmic.exe
Token: SeProfSingleProcessPrivilege	3748	wmic.exe
Token: SeIncBasePriorityPrivilege	3748	wmic.exe
Token: SeCreatePagefilePrivilege	3748	wmic.exe
Token: SeBackupPrivilege	3748	wmic.exe
Token: SeRestorePrivilege	3748	wmic.exe
Token: SeShutdownPrivilege	3748	wmic.exe
Token: SeDebugPrivilege	3748	wmic.exe
Token: SeSystemEnvironmentPrivilege	3748	wmic.exe
Token: SeRemoteShutdownPrivilege	3748	wmic.exe
Token: SeUndockPrivilege	3748	wmic.exe
Token: SeManageVolumePrivilege	3748	wmic.exe
Token: 33	3748	wmic.exe
Token: 34	3748	wmic.exe
Token: 35	3748	wmic.exe
Token: 36	3748	wmic.exe
Token: SeIncreaseQuotaPrivilege	3748	wmic.exe
Token: SeSecurityPrivilege	3748	wmic.exe
Token: SeTakeOwnershipPrivilege	3748	wmic.exe
Token: SeLoadDriverPrivilege	3748	wmic.exe
Token: SeSystemProfilePrivilege	3748	wmic.exe
Token: SeSystemtimePrivilege	3748	wmic.exe
Token: SeProfSingleProcessPrivilege	3748	wmic.exe
Token: SeIncBasePriorityPrivilege	3748	wmic.exe
Token: SeCreatePagefilePrivilege	3748	wmic.exe
Token: SeBackupPrivilege	3748	wmic.exe
Token: SeRestorePrivilege	3748	wmic.exe
Token: SeShutdownPrivilege	3748	wmic.exe
Token: SeDebugPrivilege	3748	wmic.exe
Token: SeSystemEnvironmentPrivilege	3748	wmic.exe
Token: SeRemoteShutdownPrivilege	3748	wmic.exe
Token: SeUndockPrivilege	3748	wmic.exe
Token: SeManageVolumePrivilege	3748	wmic.exe
Token: 33	3748	wmic.exe
Token: 34	3748	wmic.exe
Token: 35	3748	wmic.exe
Token: 36	3748	wmic.exe
Token: SeIncreaseQuotaPrivilege	3316	wmic.exe
Token: SeSecurityPrivilege	3316	wmic.exe
Token: SeTakeOwnershipPrivilege	3316	wmic.exe
Token: SeLoadDriverPrivilege	3316	wmic.exe
Token: SeSystemProfilePrivilege	3316	wmic.exe
Token: SeSystemtimePrivilege	3316	wmic.exe
Token: SeProfSingleProcessPrivilege	3316	wmic.exe
Token: SeIncBasePriorityPrivilege	3316	wmic.exe
Token: SeCreatePagefilePrivilege	3316	wmic.exe
Token: SeBackupPrivilege	3316	wmic.exe
Token: SeRestorePrivilege	3316	wmic.exe
Token: SeShutdownPrivilege	3316	wmic.exe
Token: SeDebugPrivilege	3316	wmic.exe
Token: SeSystemEnvironmentPrivilege	3316	wmic.exe
Token: SeRemoteShutdownPrivilege	3316	wmic.exe
Token: SeUndockPrivilege	3316	wmic.exe
Token: SeManageVolumePrivilege	3316	wmic.exe
Token: 33	3316	wmic.exe
Token: 34	3316	wmic.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 876 wrote to memory of 2788	876	Umbral.exe	82
PID 876 wrote to memory of 2788	876	Umbral.exe	82
PID 876 wrote to memory of 2480	876	Umbral.exe	85
PID 876 wrote to memory of 2480	876	Umbral.exe	85
PID 876 wrote to memory of 3748	876	Umbral.exe	87
PID 876 wrote to memory of 3748	876	Umbral.exe	87
PID 876 wrote to memory of 3316	876	Umbral.exe	92
PID 876 wrote to memory of 3316	876	Umbral.exe	92
PID 876 wrote to memory of 3372	876	Umbral.exe	94
PID 876 wrote to memory of 3372	876	Umbral.exe	94
PID 876 wrote to memory of 1904	876	Umbral.exe	97
PID 876 wrote to memory of 1904	876	Umbral.exe	97
PID 876 wrote to memory of 584	876	Umbral.exe	100
PID 876 wrote to memory of 584	876	Umbral.exe	100

C:\Users\Admin\AppData\Local\Temp\Umbral.exe
"C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:876
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Umbral.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2788
- 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:2480
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3748
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3316
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3372
- 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:1904
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:584

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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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
bd5940f08d0be56e65e5f2aaf47c538e

SHA1
d7e31b87866e5e383ab5499da64aba50f03e8443

SHA256
2d2f364c75bd2897504249f42cdf1d19374f5230aad68fa9154ea3d03e3031a6

SHA512
c34d10c7e07da44a180fae9889b61f08903aa84e8ddfa80c31c272b1ef9d491b8cec6b8a4c836c3cb1583fe8f4955c6a8db872515de3a9e10eae09610c959406

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

Filesize
948B

MD5
2b566ffd6de9e256d318da539ea226be

SHA1
5687791670b1391754d5c4d80e520cf7e3edd3db

SHA256
c292acf9fdd61c1cc21b4e3139b32b20b878b7094e7b30fc9d255f0bf60059ef

SHA512
3d76037af1080d099ef0037d1e49a40c883e452bb2e4d8f528d5f824142189ea92faa03488cadee2b30ec9b3a8283935a8b3c26e10578dd1ebbca9eda3a5ea7c

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_xhnsz4pm.g4x.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/876-172-0x000001FFB3040000-0x000001FFB304A000-memory.dmp

Filesize
40KB

Download
memory/876-170-0x00007FFA2E650000-0x00007FFA2F111000-memory.dmp

Filesize
10.8MB

Download
memory/876-133-0x000001FFB29A0000-0x000001FFB29E0000-memory.dmp

Filesize
256KB

Download
memory/876-195-0x00007FFA2E650000-0x00007FFA2F111000-memory.dmp

Filesize
10.8MB

Download
memory/876-135-0x000001FFB2F30000-0x000001FFB2F40000-memory.dmp

Filesize
64KB

Download
memory/876-177-0x000001FFCD0E0000-0x000001FFCD0FE000-memory.dmp

Filesize
120KB

Download
memory/876-176-0x000001FFB2F30000-0x000001FFB2F40000-memory.dmp

Filesize
64KB

Download
memory/876-134-0x00007FFA2E650000-0x00007FFA2F111000-memory.dmp

Filesize
10.8MB

Download
memory/876-175-0x000001FFCDC80000-0x000001FFCDCF6000-memory.dmp

Filesize
472KB

Download
memory/876-173-0x000001FFCD0A0000-0x000001FFCD0B2000-memory.dmp

Filesize
72KB

Download
memory/1904-191-0x00007FFA2E650000-0x00007FFA2F111000-memory.dmp

Filesize
10.8MB

Download
memory/1904-178-0x00007FFA2E650000-0x00007FFA2F111000-memory.dmp

Filesize
10.8MB

Download
memory/1904-189-0x0000016428FC0000-0x0000016428FD0000-memory.dmp

Filesize
64KB

Download
memory/2480-157-0x00000296EF560000-0x00000296EF570000-memory.dmp

Filesize
64KB

Download
memory/2480-171-0x00007FFA2E650000-0x00007FFA2F111000-memory.dmp

Filesize
10.8MB

Download
memory/2480-168-0x00000296EF560000-0x00000296EF570000-memory.dmp

Filesize
64KB

Download
memory/2480-156-0x00000296EF560000-0x00000296EF570000-memory.dmp

Filesize
64KB

Download
memory/2480-155-0x00007FFA2E650000-0x00007FFA2F111000-memory.dmp

Filesize
10.8MB

Download
memory/2788-153-0x00007FFA2E650000-0x00007FFA2F111000-memory.dmp

Filesize
10.8MB

Download
memory/2788-150-0x000001F1C9170000-0x000001F1C9180000-memory.dmp

Filesize
64KB

Download
memory/2788-149-0x000001F1C9170000-0x000001F1C9180000-memory.dmp

Filesize
64KB

Download
memory/2788-147-0x000001F1C9170000-0x000001F1C9180000-memory.dmp

Filesize
64KB

Download
memory/2788-148-0x000001F1C9170000-0x000001F1C9180000-memory.dmp

Filesize
64KB

Download
memory/2788-141-0x000001F1B0BB0000-0x000001F1B0BD2000-memory.dmp

Filesize
136KB

Download
memory/2788-146-0x00007FFA2E650000-0x00007FFA2F111000-memory.dmp

Filesize
10.8MB

Download