umbral | 18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922

Analysis

max time kernel
95s
max time network
96s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
05-09-2024 01:50

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General

Target

18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe
Size

231KB
MD5

2e5358fcd0403cf1c6dd36a32952d9ea
SHA1

cb03dcf965d79b39657643469b6bbdec205c0a22
SHA256

18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922
SHA512

0bc336ebad20497f6d8a89db417106ae0f306bd34588e1118b6d82b1da63890ab7ef35b646d259ac78d7c92bc3fcf87d96596f9c61de31910c7d2c4a3ebfaaac
SSDEEP

6144:xloZMarIkd8g+EtXHkv/iD4kNJe5nsAvEOXZkQlzIb8e1m2P7Ai:DoZhL+EP8kNJe5nsAvEOXZkQlE57Z

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/3668-1-0x00000283205C0000-0x0000028320600000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2448	powershell.exe
1260	powershell.exe
4956	powershell.exe
1364	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.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
22	discord.com
23	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
5	ip-api.com

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
4712	cmd.exe
4876	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2088	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4876	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
3668	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe
1364	powershell.exe
1364	powershell.exe
2448	powershell.exe
2448	powershell.exe
1260	powershell.exe
1260	powershell.exe
3456	powershell.exe
3456	powershell.exe
4956	powershell.exe
4956	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3668	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe
Token: SeIncreaseQuotaPrivilege	3608	wmic.exe
Token: SeSecurityPrivilege	3608	wmic.exe
Token: SeTakeOwnershipPrivilege	3608	wmic.exe
Token: SeLoadDriverPrivilege	3608	wmic.exe
Token: SeSystemProfilePrivilege	3608	wmic.exe
Token: SeSystemtimePrivilege	3608	wmic.exe
Token: SeProfSingleProcessPrivilege	3608	wmic.exe
Token: SeIncBasePriorityPrivilege	3608	wmic.exe
Token: SeCreatePagefilePrivilege	3608	wmic.exe
Token: SeBackupPrivilege	3608	wmic.exe
Token: SeRestorePrivilege	3608	wmic.exe
Token: SeShutdownPrivilege	3608	wmic.exe
Token: SeDebugPrivilege	3608	wmic.exe
Token: SeSystemEnvironmentPrivilege	3608	wmic.exe
Token: SeRemoteShutdownPrivilege	3608	wmic.exe
Token: SeUndockPrivilege	3608	wmic.exe
Token: SeManageVolumePrivilege	3608	wmic.exe
Token: 33	3608	wmic.exe
Token: 34	3608	wmic.exe
Token: 35	3608	wmic.exe
Token: 36	3608	wmic.exe
Token: SeIncreaseQuotaPrivilege	3608	wmic.exe
Token: SeSecurityPrivilege	3608	wmic.exe
Token: SeTakeOwnershipPrivilege	3608	wmic.exe
Token: SeLoadDriverPrivilege	3608	wmic.exe
Token: SeSystemProfilePrivilege	3608	wmic.exe
Token: SeSystemtimePrivilege	3608	wmic.exe
Token: SeProfSingleProcessPrivilege	3608	wmic.exe
Token: SeIncBasePriorityPrivilege	3608	wmic.exe
Token: SeCreatePagefilePrivilege	3608	wmic.exe
Token: SeBackupPrivilege	3608	wmic.exe
Token: SeRestorePrivilege	3608	wmic.exe
Token: SeShutdownPrivilege	3608	wmic.exe
Token: SeDebugPrivilege	3608	wmic.exe
Token: SeSystemEnvironmentPrivilege	3608	wmic.exe
Token: SeRemoteShutdownPrivilege	3608	wmic.exe
Token: SeUndockPrivilege	3608	wmic.exe
Token: SeManageVolumePrivilege	3608	wmic.exe
Token: 33	3608	wmic.exe
Token: 34	3608	wmic.exe
Token: 35	3608	wmic.exe
Token: 36	3608	wmic.exe
Token: SeDebugPrivilege	1364	powershell.exe
Token: SeDebugPrivilege	2448	powershell.exe
Token: SeDebugPrivilege	1260	powershell.exe
Token: SeDebugPrivilege	3456	powershell.exe
Token: SeIncreaseQuotaPrivilege	2548	wmic.exe
Token: SeSecurityPrivilege	2548	wmic.exe
Token: SeTakeOwnershipPrivilege	2548	wmic.exe
Token: SeLoadDriverPrivilege	2548	wmic.exe
Token: SeSystemProfilePrivilege	2548	wmic.exe
Token: SeSystemtimePrivilege	2548	wmic.exe
Token: SeProfSingleProcessPrivilege	2548	wmic.exe
Token: SeIncBasePriorityPrivilege	2548	wmic.exe
Token: SeCreatePagefilePrivilege	2548	wmic.exe
Token: SeBackupPrivilege	2548	wmic.exe
Token: SeRestorePrivilege	2548	wmic.exe
Token: SeShutdownPrivilege	2548	wmic.exe
Token: SeDebugPrivilege	2548	wmic.exe
Token: SeSystemEnvironmentPrivilege	2548	wmic.exe
Token: SeRemoteShutdownPrivilege	2548	wmic.exe
Token: SeUndockPrivilege	2548	wmic.exe
Token: SeManageVolumePrivilege	2548	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3668 wrote to memory of 3608	3668	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	83
PID 3668 wrote to memory of 3608	3668	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	83
PID 3668 wrote to memory of 4796	3668	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	89
PID 3668 wrote to memory of 4796	3668	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	89
PID 3668 wrote to memory of 1364	3668	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	91
PID 3668 wrote to memory of 1364	3668	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	91
PID 3668 wrote to memory of 2448	3668	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	93
PID 3668 wrote to memory of 2448	3668	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	93
PID 3668 wrote to memory of 1260	3668	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	95
PID 3668 wrote to memory of 1260	3668	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	95
PID 3668 wrote to memory of 3456	3668	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	97
PID 3668 wrote to memory of 3456	3668	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	97
PID 3668 wrote to memory of 2548	3668	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	101
PID 3668 wrote to memory of 2548	3668	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	101
PID 3668 wrote to memory of 3940	3668	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	103
PID 3668 wrote to memory of 3940	3668	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	103
PID 3668 wrote to memory of 2964	3668	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	106
PID 3668 wrote to memory of 2964	3668	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	106
PID 3668 wrote to memory of 4956	3668	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	108
PID 3668 wrote to memory of 4956	3668	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	108
PID 3668 wrote to memory of 2088	3668	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	110
PID 3668 wrote to memory of 2088	3668	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	110
PID 3668 wrote to memory of 4712	3668	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	112
PID 3668 wrote to memory of 4712	3668	18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe	112
PID 4712 wrote to memory of 4876	4712	cmd.exe	114
PID 4712 wrote to memory of 4876	4712	cmd.exe	114

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4796	attrib.exe

C:\Users\Admin\AppData\Local\Temp\18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe
"C:\Users\Admin\AppData\Local\Temp\18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3668
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3608
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe"
  2⤵
  - Views/modifies file attributes
  PID:4796
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1364
- 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:2448
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1260
- 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:3456
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2548
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:3940
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2964
- 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:4956
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2088
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4712
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:4876

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

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

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
6317adf4fbc43ea2fd68861fafd57155

SHA1
6b87c718893c83c6eed2767e8d9cbc6443e31913

SHA256
c1ead17eef37b4b461cedc276504a441489e819c7f943037f2001966aeec90af

SHA512
17229aae8622e4bfc3caaac55684f7d4ccd3162af5919c851b1d8ac4060b6bb7b75044ecee116523d05acb55197dcb60780958f629450edef386f1e6f65f49f0

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_zyomsgnf.k1p.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1364-4-0x00007FFE57000000-0x00007FFE57AC1000-memory.dmp

Filesize
10.8MB

Download
memory/1364-17-0x00007FFE57000000-0x00007FFE57AC1000-memory.dmp

Filesize
10.8MB

Download
memory/1364-10-0x000001D07BBE0000-0x000001D07BC02000-memory.dmp

Filesize
136KB

Download
memory/1364-3-0x00007FFE57000000-0x00007FFE57AC1000-memory.dmp

Filesize
10.8MB

Download
memory/3668-0-0x00007FFE57003000-0x00007FFE57005000-memory.dmp

Filesize
8KB

Download
memory/3668-32-0x000002833AD50000-0x000002833ADC6000-memory.dmp

Filesize
472KB

Download
memory/3668-33-0x000002833ACD0000-0x000002833AD20000-memory.dmp

Filesize
320KB

Download
memory/3668-34-0x0000028322250000-0x000002832226E000-memory.dmp

Filesize
120KB

Download
memory/3668-2-0x00007FFE57000000-0x00007FFE57AC1000-memory.dmp

Filesize
10.8MB

Download
memory/3668-69-0x000002833AB90000-0x000002833AB9A000-memory.dmp

Filesize
40KB

Download
memory/3668-70-0x000002833AD20000-0x000002833AD32000-memory.dmp

Filesize
72KB

Download
memory/3668-1-0x00000283205C0000-0x0000028320600000-memory.dmp

Filesize
256KB

Download
memory/3668-86-0x00007FFE57000000-0x00007FFE57AC1000-memory.dmp

Filesize
10.8MB

Download