umbral | b176f79057adf0432e8cedb42d0d2ec44ac772da03a629bd97f4febf0cb7347d

Analysis

max time kernel
149s
max time network
153s
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 04:48

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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/2312-1-0x000002377F840000-0x000002377F880000-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
4604	powershell.exe
4888	powershell.exe
4864	powershell.exe
212	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
19	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
6	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
960	cmd.exe
4412	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4036	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4412	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
2312	Umbral.exe
4604	powershell.exe
4604	powershell.exe
4888	powershell.exe
4888	powershell.exe
4864	powershell.exe
4864	powershell.exe
4112	powershell.exe
4112	powershell.exe
212	powershell.exe
212	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2312	Umbral.exe
Token: SeIncreaseQuotaPrivilege	2096	wmic.exe
Token: SeSecurityPrivilege	2096	wmic.exe
Token: SeTakeOwnershipPrivilege	2096	wmic.exe
Token: SeLoadDriverPrivilege	2096	wmic.exe
Token: SeSystemProfilePrivilege	2096	wmic.exe
Token: SeSystemtimePrivilege	2096	wmic.exe
Token: SeProfSingleProcessPrivilege	2096	wmic.exe
Token: SeIncBasePriorityPrivilege	2096	wmic.exe
Token: SeCreatePagefilePrivilege	2096	wmic.exe
Token: SeBackupPrivilege	2096	wmic.exe
Token: SeRestorePrivilege	2096	wmic.exe
Token: SeShutdownPrivilege	2096	wmic.exe
Token: SeDebugPrivilege	2096	wmic.exe
Token: SeSystemEnvironmentPrivilege	2096	wmic.exe
Token: SeRemoteShutdownPrivilege	2096	wmic.exe
Token: SeUndockPrivilege	2096	wmic.exe
Token: SeManageVolumePrivilege	2096	wmic.exe
Token: 33	2096	wmic.exe
Token: 34	2096	wmic.exe
Token: 35	2096	wmic.exe
Token: 36	2096	wmic.exe
Token: SeIncreaseQuotaPrivilege	2096	wmic.exe
Token: SeSecurityPrivilege	2096	wmic.exe
Token: SeTakeOwnershipPrivilege	2096	wmic.exe
Token: SeLoadDriverPrivilege	2096	wmic.exe
Token: SeSystemProfilePrivilege	2096	wmic.exe
Token: SeSystemtimePrivilege	2096	wmic.exe
Token: SeProfSingleProcessPrivilege	2096	wmic.exe
Token: SeIncBasePriorityPrivilege	2096	wmic.exe
Token: SeCreatePagefilePrivilege	2096	wmic.exe
Token: SeBackupPrivilege	2096	wmic.exe
Token: SeRestorePrivilege	2096	wmic.exe
Token: SeShutdownPrivilege	2096	wmic.exe
Token: SeDebugPrivilege	2096	wmic.exe
Token: SeSystemEnvironmentPrivilege	2096	wmic.exe
Token: SeRemoteShutdownPrivilege	2096	wmic.exe
Token: SeUndockPrivilege	2096	wmic.exe
Token: SeManageVolumePrivilege	2096	wmic.exe
Token: 33	2096	wmic.exe
Token: 34	2096	wmic.exe
Token: 35	2096	wmic.exe
Token: 36	2096	wmic.exe
Token: SeDebugPrivilege	4604	powershell.exe
Token: SeDebugPrivilege	4888	powershell.exe
Token: SeDebugPrivilege	4864	powershell.exe
Token: SeDebugPrivilege	4112	powershell.exe
Token: SeIncreaseQuotaPrivilege	2132	wmic.exe
Token: SeSecurityPrivilege	2132	wmic.exe
Token: SeTakeOwnershipPrivilege	2132	wmic.exe
Token: SeLoadDriverPrivilege	2132	wmic.exe
Token: SeSystemProfilePrivilege	2132	wmic.exe
Token: SeSystemtimePrivilege	2132	wmic.exe
Token: SeProfSingleProcessPrivilege	2132	wmic.exe
Token: SeIncBasePriorityPrivilege	2132	wmic.exe
Token: SeCreatePagefilePrivilege	2132	wmic.exe
Token: SeBackupPrivilege	2132	wmic.exe
Token: SeRestorePrivilege	2132	wmic.exe
Token: SeShutdownPrivilege	2132	wmic.exe
Token: SeDebugPrivilege	2132	wmic.exe
Token: SeSystemEnvironmentPrivilege	2132	wmic.exe
Token: SeRemoteShutdownPrivilege	2132	wmic.exe
Token: SeUndockPrivilege	2132	wmic.exe
Token: SeManageVolumePrivilege	2132	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2312 wrote to memory of 2096	2312	Umbral.exe	86
PID 2312 wrote to memory of 2096	2312	Umbral.exe	86
PID 2312 wrote to memory of 2172	2312	Umbral.exe	89
PID 2312 wrote to memory of 2172	2312	Umbral.exe	89
PID 2312 wrote to memory of 4604	2312	Umbral.exe	91
PID 2312 wrote to memory of 4604	2312	Umbral.exe	91
PID 2312 wrote to memory of 4888	2312	Umbral.exe	94
PID 2312 wrote to memory of 4888	2312	Umbral.exe	94
PID 2312 wrote to memory of 4864	2312	Umbral.exe	96
PID 2312 wrote to memory of 4864	2312	Umbral.exe	96
PID 2312 wrote to memory of 4112	2312	Umbral.exe	98
PID 2312 wrote to memory of 4112	2312	Umbral.exe	98
PID 2312 wrote to memory of 2132	2312	Umbral.exe	100
PID 2312 wrote to memory of 2132	2312	Umbral.exe	100
PID 2312 wrote to memory of 3528	2312	Umbral.exe	102
PID 2312 wrote to memory of 3528	2312	Umbral.exe	102
PID 2312 wrote to memory of 3980	2312	Umbral.exe	104
PID 2312 wrote to memory of 3980	2312	Umbral.exe	104
PID 2312 wrote to memory of 212	2312	Umbral.exe	106
PID 2312 wrote to memory of 212	2312	Umbral.exe	106
PID 2312 wrote to memory of 4036	2312	Umbral.exe	108
PID 2312 wrote to memory of 4036	2312	Umbral.exe	108
PID 2312 wrote to memory of 960	2312	Umbral.exe	112
PID 2312 wrote to memory of 960	2312	Umbral.exe	112
PID 960 wrote to memory of 4412	960	cmd.exe	114
PID 960 wrote to memory of 4412	960	cmd.exe	114

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2172	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:2312
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2096
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:2172
- 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:4604
- 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:4888
- 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:4864
- 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:4112
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2132
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:3528
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3980
- 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:212
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4036
- 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:960
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:4412

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
5824a6037c081fda5d46de274b6e2799

SHA1
526367a09300cbde430e8fb44e41cbe7a0937aac

SHA256
4d610d9cd32a20279c7133a726ff61820d6930e5aa18253ee1422f3a6f54953f

SHA512
a109b150f730cda78d5bee106bd232f9dca7500dfb7899c6919de2bd542e345ca271aa11809a24ea0a27dca158067ab3a2d5688ac0a2325185143245f1665582

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
063fa26d779f114734bd9130125608c3

SHA1
3a1b8fb1a319f6c40a71b117d6b07106d2a53857

SHA256
e8f8cb3e295999c4b311836d5fe1213b4721d56ab14af3eacd1bcdd051b5a66b

SHA512
fbe868cad1196fa3630581f269e8c512af1ed7b1d1e5708c369ed28810d37e48301370f19260657f47a560165113d28437741db39b91aaff69776143598b4391

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_qrzwfjf5.pyi.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2312-72-0x000002377FD00000-0x000002377FD12000-memory.dmp

Filesize
72KB

Download
memory/2312-35-0x000002377FBD0000-0x000002377FBEE000-memory.dmp

Filesize
120KB

Download
memory/2312-91-0x00007FFC9A040000-0x00007FFC9AB01000-memory.dmp

Filesize
10.8MB

Download
memory/2312-90-0x000002371A370000-0x000002371A519000-memory.dmp

Filesize
1.7MB

Download
memory/2312-2-0x00007FFC9A040000-0x00007FFC9AB01000-memory.dmp

Filesize
10.8MB

Download
memory/2312-33-0x000002377FC80000-0x000002377FCF6000-memory.dmp

Filesize
472KB

Download
memory/2312-34-0x000002377FC20000-0x000002377FC70000-memory.dmp

Filesize
320KB

Download
memory/2312-71-0x000002377FBB0000-0x000002377FBBA000-memory.dmp

Filesize
40KB

Download
memory/2312-1-0x000002377F840000-0x000002377F880000-memory.dmp

Filesize
256KB

Download
memory/2312-0-0x00007FFC9A043000-0x00007FFC9A045000-memory.dmp

Filesize
8KB

Download
memory/4604-4-0x00007FFC9A040000-0x00007FFC9AB01000-memory.dmp

Filesize
10.8MB

Download
memory/4604-15-0x00007FFC9A040000-0x00007FFC9AB01000-memory.dmp

Filesize
10.8MB

Download
memory/4604-14-0x00007FFC9A040000-0x00007FFC9AB01000-memory.dmp

Filesize
10.8MB

Download
memory/4604-3-0x0000023A2F180000-0x0000023A2F1A2000-memory.dmp

Filesize
136KB

Download
memory/4604-18-0x00007FFC9A040000-0x00007FFC9AB01000-memory.dmp

Filesize
10.8MB

Download