umbral | e899e164d7941ef537bd9e1b6ec3cce4853836cc0893df4ab18e291bba93099a

Analysis

max time kernel
139s
max time network
141s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
27-10-2024 21:31

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General

Target

Umbral.exe
Size

229KB
MD5

f2b455f6e472b641d1ccc3f9c01cf429
SHA1

e31c726c4d8a5a786940cb513eb90a07f2a81ca8
SHA256

e899e164d7941ef537bd9e1b6ec3cce4853836cc0893df4ab18e291bba93099a
SHA512

460b49463f834562d5ecf567a992c2ff7c282eeb9d9524a2db809143561c35b6cf8a86fc474e15c6366196a5111656536bcb97c57b7a2d1320427b467cf66c52
SSDEEP

6144:FloZMKrIkd8g+EtXHkv/iD4BtDSdLocDxabtIExCgb8e1mk2i:HoZJL+EP8BtDSdLocDxabtIExLX7

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/1648-1-0x0000020EE9D80000-0x0000020EE9DC0000-memory.dmp	family_umbral

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

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
1772	powershell.exe
4476	powershell.exe
2896	powershell.exe

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

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

Web Service

T1102

flow	ioc
20	discord.com
21	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
17	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
380	wmic.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1772	powershell.exe
1772	powershell.exe
4476	powershell.exe
4476	powershell.exe
2896	powershell.exe
2896	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1648	Umbral.exe
Token: SeDebugPrivilege	1772	powershell.exe
Token: SeDebugPrivilege	4476	powershell.exe
Token: SeIncreaseQuotaPrivilege	4968	wmic.exe
Token: SeSecurityPrivilege	4968	wmic.exe
Token: SeTakeOwnershipPrivilege	4968	wmic.exe
Token: SeLoadDriverPrivilege	4968	wmic.exe
Token: SeSystemProfilePrivilege	4968	wmic.exe
Token: SeSystemtimePrivilege	4968	wmic.exe
Token: SeProfSingleProcessPrivilege	4968	wmic.exe
Token: SeIncBasePriorityPrivilege	4968	wmic.exe
Token: SeCreatePagefilePrivilege	4968	wmic.exe
Token: SeBackupPrivilege	4968	wmic.exe
Token: SeRestorePrivilege	4968	wmic.exe
Token: SeShutdownPrivilege	4968	wmic.exe
Token: SeDebugPrivilege	4968	wmic.exe
Token: SeSystemEnvironmentPrivilege	4968	wmic.exe
Token: SeRemoteShutdownPrivilege	4968	wmic.exe
Token: SeUndockPrivilege	4968	wmic.exe
Token: SeManageVolumePrivilege	4968	wmic.exe
Token: 33	4968	wmic.exe
Token: 34	4968	wmic.exe
Token: 35	4968	wmic.exe
Token: 36	4968	wmic.exe
Token: SeIncreaseQuotaPrivilege	4968	wmic.exe
Token: SeSecurityPrivilege	4968	wmic.exe
Token: SeTakeOwnershipPrivilege	4968	wmic.exe
Token: SeLoadDriverPrivilege	4968	wmic.exe
Token: SeSystemProfilePrivilege	4968	wmic.exe
Token: SeSystemtimePrivilege	4968	wmic.exe
Token: SeProfSingleProcessPrivilege	4968	wmic.exe
Token: SeIncBasePriorityPrivilege	4968	wmic.exe
Token: SeCreatePagefilePrivilege	4968	wmic.exe
Token: SeBackupPrivilege	4968	wmic.exe
Token: SeRestorePrivilege	4968	wmic.exe
Token: SeShutdownPrivilege	4968	wmic.exe
Token: SeDebugPrivilege	4968	wmic.exe
Token: SeSystemEnvironmentPrivilege	4968	wmic.exe
Token: SeRemoteShutdownPrivilege	4968	wmic.exe
Token: SeUndockPrivilege	4968	wmic.exe
Token: SeManageVolumePrivilege	4968	wmic.exe
Token: 33	4968	wmic.exe
Token: 34	4968	wmic.exe
Token: 35	4968	wmic.exe
Token: 36	4968	wmic.exe
Token: SeIncreaseQuotaPrivilege	4044	wmic.exe
Token: SeSecurityPrivilege	4044	wmic.exe
Token: SeTakeOwnershipPrivilege	4044	wmic.exe
Token: SeLoadDriverPrivilege	4044	wmic.exe
Token: SeSystemProfilePrivilege	4044	wmic.exe
Token: SeSystemtimePrivilege	4044	wmic.exe
Token: SeProfSingleProcessPrivilege	4044	wmic.exe
Token: SeIncBasePriorityPrivilege	4044	wmic.exe
Token: SeCreatePagefilePrivilege	4044	wmic.exe
Token: SeBackupPrivilege	4044	wmic.exe
Token: SeRestorePrivilege	4044	wmic.exe
Token: SeShutdownPrivilege	4044	wmic.exe
Token: SeDebugPrivilege	4044	wmic.exe
Token: SeSystemEnvironmentPrivilege	4044	wmic.exe
Token: SeRemoteShutdownPrivilege	4044	wmic.exe
Token: SeUndockPrivilege	4044	wmic.exe
Token: SeManageVolumePrivilege	4044	wmic.exe
Token: 33	4044	wmic.exe
Token: 34	4044	wmic.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1648 wrote to memory of 1772	1648	Umbral.exe	84
PID 1648 wrote to memory of 1772	1648	Umbral.exe	84
PID 1648 wrote to memory of 4476	1648	Umbral.exe	87
PID 1648 wrote to memory of 4476	1648	Umbral.exe	87
PID 1648 wrote to memory of 4968	1648	Umbral.exe	91
PID 1648 wrote to memory of 4968	1648	Umbral.exe	91
PID 1648 wrote to memory of 4044	1648	Umbral.exe	94
PID 1648 wrote to memory of 4044	1648	Umbral.exe	94
PID 1648 wrote to memory of 4356	1648	Umbral.exe	98
PID 1648 wrote to memory of 4356	1648	Umbral.exe	98
PID 1648 wrote to memory of 2896	1648	Umbral.exe	100
PID 1648 wrote to memory of 2896	1648	Umbral.exe	100
PID 1648 wrote to memory of 380	1648	Umbral.exe	102
PID 1648 wrote to memory of 380	1648	Umbral.exe	102

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:1648
- 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:1772
- 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⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4476
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4968
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4044
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4356
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  PID:2896
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:380

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

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

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

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
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
948B

MD5
c9b6705519e1eef08f86c4ba5f4286f3

SHA1
6c6b179e452ecee2673a1d4fe128f1c06f70577f

SHA256
0f9cad44a79126871580e19b01dc3f880c5173b1faaf8b9018d5d1f829714705

SHA512
6d8f85a7a8b0b124530f36a157cd0441b5c1eacdc35e274af9fbf0569d03d1d5e468651a5b2425f0215c282ecfa7b1ffeaeeaf18612822f00bd14306d30640c7

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_t3ho2ntm.vpv.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1648-32-0x0000020EEC500000-0x0000020EEC576000-memory.dmp

Filesize
472KB

Download
memory/1648-1-0x0000020EE9D80000-0x0000020EE9DC0000-memory.dmp

Filesize
256KB

Download
memory/1648-2-0x00007FFA7BF20000-0x00007FFA7C9E1000-memory.dmp

Filesize
10.8MB

Download
memory/1648-0-0x00007FFA7BF23000-0x00007FFA7BF25000-memory.dmp

Filesize
8KB

Download
memory/1648-51-0x00007FFA7BF20000-0x00007FFA7C9E1000-memory.dmp

Filesize
10.8MB

Download
memory/1648-36-0x0000020EEC240000-0x0000020EEC25E000-memory.dmp

Filesize
120KB

Download
memory/1648-33-0x0000020EEC1F0000-0x0000020EEC1FA000-memory.dmp

Filesize
40KB

Download
memory/1648-34-0x0000020EEC220000-0x0000020EEC232000-memory.dmp

Filesize
72KB

Download
memory/1772-3-0x00000121FA5D0000-0x00000121FA5F2000-memory.dmp

Filesize
136KB

Download
memory/1772-19-0x00007FFA7BF20000-0x00007FFA7C9E1000-memory.dmp

Filesize
10.8MB

Download
memory/1772-16-0x00007FFA7BF20000-0x00007FFA7C9E1000-memory.dmp

Filesize
10.8MB

Download
memory/1772-15-0x00007FFA7BF20000-0x00007FFA7C9E1000-memory.dmp

Filesize
10.8MB

Download
memory/1772-14-0x00007FFA7BF20000-0x00007FFA7C9E1000-memory.dmp

Filesize
10.8MB

Download
memory/1772-13-0x00007FFA7BF20000-0x00007FFA7C9E1000-memory.dmp

Filesize
10.8MB

Download