umbral | b176f79057adf0432e8cedb42d0d2ec44ac772da03a629bd97f4febf0cb7347d

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
08-09-2024 10:24

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General

Target

Umbral.exe
Size

232KB
MD5

0a1a80122976fd1b62cd01889535b700
SHA1

e14b2b77529495b62f54d4ca7828acba8e3e5788
SHA256

b176f79057adf0432e8cedb42d0d2ec44ac772da03a629bd97f4febf0cb7347d
SHA512

4e9ef98911a2131681e5acf23ca1d679455374f905eb54e05f70b48d7c59098f7a6048fc89f5afdcd4570d047341490a75ceed4fd9e787f7eb18167f214d63a9
SSDEEP

6144:xloZM+rIkd8g+EtXHkv/iD42L57aMS1NmPzus9x4XNb8e1mVW3i:DoZtL+EP82L57aMS1NmPzus9x49G

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/2124-1-0x00000239EF6A0000-0x00000239EF6E0000-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

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

execution

PowerShell

T1059.001

pid	Process
2596	powershell.exe
2632	powershell.exe
3740	powershell.exe
3980	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	Umbral.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
7	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
4044	cmd.exe
4212	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1196	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4212	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
2124	Umbral.exe
2596	powershell.exe
2596	powershell.exe
2632	powershell.exe
2632	powershell.exe
3740	powershell.exe
3740	powershell.exe
1136	powershell.exe
1136	powershell.exe
3980	powershell.exe
3980	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2124	Umbral.exe
Token: SeIncreaseQuotaPrivilege	1664	wmic.exe
Token: SeSecurityPrivilege	1664	wmic.exe
Token: SeTakeOwnershipPrivilege	1664	wmic.exe
Token: SeLoadDriverPrivilege	1664	wmic.exe
Token: SeSystemProfilePrivilege	1664	wmic.exe
Token: SeSystemtimePrivilege	1664	wmic.exe
Token: SeProfSingleProcessPrivilege	1664	wmic.exe
Token: SeIncBasePriorityPrivilege	1664	wmic.exe
Token: SeCreatePagefilePrivilege	1664	wmic.exe
Token: SeBackupPrivilege	1664	wmic.exe
Token: SeRestorePrivilege	1664	wmic.exe
Token: SeShutdownPrivilege	1664	wmic.exe
Token: SeDebugPrivilege	1664	wmic.exe
Token: SeSystemEnvironmentPrivilege	1664	wmic.exe
Token: SeRemoteShutdownPrivilege	1664	wmic.exe
Token: SeUndockPrivilege	1664	wmic.exe
Token: SeManageVolumePrivilege	1664	wmic.exe
Token: 33	1664	wmic.exe
Token: 34	1664	wmic.exe
Token: 35	1664	wmic.exe
Token: 36	1664	wmic.exe
Token: SeIncreaseQuotaPrivilege	1664	wmic.exe
Token: SeSecurityPrivilege	1664	wmic.exe
Token: SeTakeOwnershipPrivilege	1664	wmic.exe
Token: SeLoadDriverPrivilege	1664	wmic.exe
Token: SeSystemProfilePrivilege	1664	wmic.exe
Token: SeSystemtimePrivilege	1664	wmic.exe
Token: SeProfSingleProcessPrivilege	1664	wmic.exe
Token: SeIncBasePriorityPrivilege	1664	wmic.exe
Token: SeCreatePagefilePrivilege	1664	wmic.exe
Token: SeBackupPrivilege	1664	wmic.exe
Token: SeRestorePrivilege	1664	wmic.exe
Token: SeShutdownPrivilege	1664	wmic.exe
Token: SeDebugPrivilege	1664	wmic.exe
Token: SeSystemEnvironmentPrivilege	1664	wmic.exe
Token: SeRemoteShutdownPrivilege	1664	wmic.exe
Token: SeUndockPrivilege	1664	wmic.exe
Token: SeManageVolumePrivilege	1664	wmic.exe
Token: 33	1664	wmic.exe
Token: 34	1664	wmic.exe
Token: 35	1664	wmic.exe
Token: 36	1664	wmic.exe
Token: SeDebugPrivilege	2596	powershell.exe
Token: SeDebugPrivilege	2632	powershell.exe
Token: SeDebugPrivilege	3740	powershell.exe
Token: SeDebugPrivilege	1136	powershell.exe
Token: SeIncreaseQuotaPrivilege	3576	wmic.exe
Token: SeSecurityPrivilege	3576	wmic.exe
Token: SeTakeOwnershipPrivilege	3576	wmic.exe
Token: SeLoadDriverPrivilege	3576	wmic.exe
Token: SeSystemProfilePrivilege	3576	wmic.exe
Token: SeSystemtimePrivilege	3576	wmic.exe
Token: SeProfSingleProcessPrivilege	3576	wmic.exe
Token: SeIncBasePriorityPrivilege	3576	wmic.exe
Token: SeCreatePagefilePrivilege	3576	wmic.exe
Token: SeBackupPrivilege	3576	wmic.exe
Token: SeRestorePrivilege	3576	wmic.exe
Token: SeShutdownPrivilege	3576	wmic.exe
Token: SeDebugPrivilege	3576	wmic.exe
Token: SeSystemEnvironmentPrivilege	3576	wmic.exe
Token: SeRemoteShutdownPrivilege	3576	wmic.exe
Token: SeUndockPrivilege	3576	wmic.exe
Token: SeManageVolumePrivilege	3576	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2124 wrote to memory of 1664	2124	Umbral.exe	86
PID 2124 wrote to memory of 1664	2124	Umbral.exe	86
PID 2124 wrote to memory of 1828	2124	Umbral.exe	89
PID 2124 wrote to memory of 1828	2124	Umbral.exe	89
PID 2124 wrote to memory of 2596	2124	Umbral.exe	91
PID 2124 wrote to memory of 2596	2124	Umbral.exe	91
PID 2124 wrote to memory of 2632	2124	Umbral.exe	94
PID 2124 wrote to memory of 2632	2124	Umbral.exe	94
PID 2124 wrote to memory of 3740	2124	Umbral.exe	96
PID 2124 wrote to memory of 3740	2124	Umbral.exe	96
PID 2124 wrote to memory of 1136	2124	Umbral.exe	98
PID 2124 wrote to memory of 1136	2124	Umbral.exe	98
PID 2124 wrote to memory of 3576	2124	Umbral.exe	100
PID 2124 wrote to memory of 3576	2124	Umbral.exe	100
PID 2124 wrote to memory of 4684	2124	Umbral.exe	102
PID 2124 wrote to memory of 4684	2124	Umbral.exe	102
PID 2124 wrote to memory of 2088	2124	Umbral.exe	104
PID 2124 wrote to memory of 2088	2124	Umbral.exe	104
PID 2124 wrote to memory of 3980	2124	Umbral.exe	106
PID 2124 wrote to memory of 3980	2124	Umbral.exe	106
PID 2124 wrote to memory of 1196	2124	Umbral.exe	108
PID 2124 wrote to memory of 1196	2124	Umbral.exe	108
PID 2124 wrote to memory of 4044	2124	Umbral.exe	113
PID 2124 wrote to memory of 4044	2124	Umbral.exe	113
PID 4044 wrote to memory of 4212	4044	cmd.exe	115
PID 4044 wrote to memory of 4212	4044	cmd.exe	115

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
1828	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Umbral.exe
"C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2124
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1664
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:1828
- 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:2596
- 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:2632
- 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:3740
- 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:1136
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3576
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:4684
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2088
- 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:3980
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1196
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Umbral.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4044
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:4212

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
bd5940f08d0be56e65e5f2aaf47c538e

SHA1
d7e31b87866e5e383ab5499da64aba50f03e8443

SHA256
2d2f364c75bd2897504249f42cdf1d19374f5230aad68fa9154ea3d03e3031a6

SHA512
c34d10c7e07da44a180fae9889b61f08903aa84e8ddfa80c31c272b1ef9d491b8cec6b8a4c836c3cb1583fe8f4955c6a8db872515de3a9e10eae09610c959406

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\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
88be3bc8a7f90e3953298c0fdbec4d72

SHA1
f4969784ad421cc80ef45608727aacd0f6bf2e4b

SHA256
533c8470b41084e40c5660569ebbdb7496520d449629a235e8053e84025f348a

SHA512
4fce64e2dacddbc03314048fef1ce356ee2647c14733da121c23c65507eeb8d721d6b690ad5463319b364dc4fa95904ad6ab096907f32918e3406ef438a6ef7c

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

Filesize
1KB

MD5
cf1c8e9759d5bd9ce56885400fa632d8

SHA1
7e1ffc794b2bc22cb9498d5731012ab6e8c8ec22

SHA256
05d6d5acc2cd7410ab8e3b818b6953171a92cdcc9918eabbf495ee40c30d361d

SHA512
1eba8a3ae08ea54bdab26c070fabd3f0157d66a7c6ac477532b18d855a766f9750852e7693235b0fbcd2782188a3f6df31b845558301111bcd8b6956d1853df9

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_gxmiaruf.eow.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2124-71-0x00000239F1C80000-0x00000239F1C8A000-memory.dmp

Filesize
40KB

Download
memory/2124-35-0x00000239F1C50000-0x00000239F1C6E000-memory.dmp

Filesize
120KB

Download
memory/2124-92-0x00007FFAF6970000-0x00007FFAF7431000-memory.dmp

Filesize
10.8MB

Download
memory/2124-88-0x00007FFAF6970000-0x00007FFAF7431000-memory.dmp

Filesize
10.8MB

Download
memory/2124-2-0x00007FFAF6970000-0x00007FFAF7431000-memory.dmp

Filesize
10.8MB

Download
memory/2124-33-0x00000239F1E20000-0x00000239F1E96000-memory.dmp

Filesize
472KB

Download
memory/2124-34-0x00000239F1DA0000-0x00000239F1DF0000-memory.dmp

Filesize
320KB

Download
memory/2124-85-0x00007FFAF6973000-0x00007FFAF6975000-memory.dmp

Filesize
8KB

Download
memory/2124-1-0x00000239EF6A0000-0x00000239EF6E0000-memory.dmp

Filesize
256KB

Download
memory/2124-0-0x00007FFAF6973000-0x00007FFAF6975000-memory.dmp

Filesize
8KB

Download
memory/2124-72-0x00000239F1FA0000-0x00000239F1FB2000-memory.dmp

Filesize
72KB

Download
memory/2596-4-0x00007FFAF6970000-0x00007FFAF7431000-memory.dmp

Filesize
10.8MB

Download
memory/2596-10-0x0000023D6E190000-0x0000023D6E1B2000-memory.dmp

Filesize
136KB

Download
memory/2596-15-0x00007FFAF6970000-0x00007FFAF7431000-memory.dmp

Filesize
10.8MB

Download
memory/2596-3-0x00007FFAF6970000-0x00007FFAF7431000-memory.dmp

Filesize
10.8MB

Download
memory/2596-18-0x00007FFAF6970000-0x00007FFAF7431000-memory.dmp

Filesize
10.8MB

Download