umbral | cfb7119e9b1eea0c3f511fb51952399c3f10edb91e12030e49a30172b0510e7e

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
23/08/2024, 06:48

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General

Target
lol.exe
Size 229KB
Sample240823-hkr7vasfmk
SHA256 cfb7119e9b1eea0c3f511fb51952399c3f10edb91e12030e49a30172b0510e7e
MD5 ea031754ac9fe28dbc0c5915cb638e44
SHA1 14b2c7b94aefdfc911e26fc5deb6eb8b6d7c0aed
SHA512 39a0790b3bae0862b1ba87bd6d1165694ba09cfa5104935e00ebaa13924699b2efba92ee6e744d3d820a9c05f80fa41fa1649498dce8f430835e8c6e813c25bb
SSDEEP 6144:9loZM9rIkd8g+EtXHkv/iD4RugVzZqStvY5rWWDFZb8e1m7i:foZOL+EP8RugVzZqStvY5rWWD3V
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/960-1-0x000001F679970000-0x000001F6799B0000-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
1836	powershell.exe
536	powershell.exe
436	powershell.exe
3976	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	lol.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
31	discord.com
32	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
26	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
2320	cmd.exe
3736	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
3720	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3736	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
1836	powershell.exe
1836	powershell.exe
536	powershell.exe
536	powershell.exe
436	powershell.exe
436	powershell.exe
2168	powershell.exe
2168	powershell.exe
3976	powershell.exe
3976	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	960	lol.exe
Token: SeDebugPrivilege	1836	powershell.exe
Token: SeDebugPrivilege	536	powershell.exe
Token: SeDebugPrivilege	436	powershell.exe
Token: SeDebugPrivilege	2168	powershell.exe
Token: SeIncreaseQuotaPrivilege	1088	wmic.exe
Token: SeSecurityPrivilege	1088	wmic.exe
Token: SeTakeOwnershipPrivilege	1088	wmic.exe
Token: SeLoadDriverPrivilege	1088	wmic.exe
Token: SeSystemProfilePrivilege	1088	wmic.exe
Token: SeSystemtimePrivilege	1088	wmic.exe
Token: SeProfSingleProcessPrivilege	1088	wmic.exe
Token: SeIncBasePriorityPrivilege	1088	wmic.exe
Token: SeCreatePagefilePrivilege	1088	wmic.exe
Token: SeBackupPrivilege	1088	wmic.exe
Token: SeRestorePrivilege	1088	wmic.exe
Token: SeShutdownPrivilege	1088	wmic.exe
Token: SeDebugPrivilege	1088	wmic.exe
Token: SeSystemEnvironmentPrivilege	1088	wmic.exe
Token: SeRemoteShutdownPrivilege	1088	wmic.exe
Token: SeUndockPrivilege	1088	wmic.exe
Token: SeManageVolumePrivilege	1088	wmic.exe
Token: 33	1088	wmic.exe
Token: 34	1088	wmic.exe
Token: 35	1088	wmic.exe
Token: 36	1088	wmic.exe
Token: SeIncreaseQuotaPrivilege	1088	wmic.exe
Token: SeSecurityPrivilege	1088	wmic.exe
Token: SeTakeOwnershipPrivilege	1088	wmic.exe
Token: SeLoadDriverPrivilege	1088	wmic.exe
Token: SeSystemProfilePrivilege	1088	wmic.exe
Token: SeSystemtimePrivilege	1088	wmic.exe
Token: SeProfSingleProcessPrivilege	1088	wmic.exe
Token: SeIncBasePriorityPrivilege	1088	wmic.exe
Token: SeCreatePagefilePrivilege	1088	wmic.exe
Token: SeBackupPrivilege	1088	wmic.exe
Token: SeRestorePrivilege	1088	wmic.exe
Token: SeShutdownPrivilege	1088	wmic.exe
Token: SeDebugPrivilege	1088	wmic.exe
Token: SeSystemEnvironmentPrivilege	1088	wmic.exe
Token: SeRemoteShutdownPrivilege	1088	wmic.exe
Token: SeUndockPrivilege	1088	wmic.exe
Token: SeManageVolumePrivilege	1088	wmic.exe
Token: 33	1088	wmic.exe
Token: 34	1088	wmic.exe
Token: 35	1088	wmic.exe
Token: 36	1088	wmic.exe
Token: SeIncreaseQuotaPrivilege	1512	wmic.exe
Token: SeSecurityPrivilege	1512	wmic.exe
Token: SeTakeOwnershipPrivilege	1512	wmic.exe
Token: SeLoadDriverPrivilege	1512	wmic.exe
Token: SeSystemProfilePrivilege	1512	wmic.exe
Token: SeSystemtimePrivilege	1512	wmic.exe
Token: SeProfSingleProcessPrivilege	1512	wmic.exe
Token: SeIncBasePriorityPrivilege	1512	wmic.exe
Token: SeCreatePagefilePrivilege	1512	wmic.exe
Token: SeBackupPrivilege	1512	wmic.exe
Token: SeRestorePrivilege	1512	wmic.exe
Token: SeShutdownPrivilege	1512	wmic.exe
Token: SeDebugPrivilege	1512	wmic.exe
Token: SeSystemEnvironmentPrivilege	1512	wmic.exe
Token: SeRemoteShutdownPrivilege	1512	wmic.exe
Token: SeUndockPrivilege	1512	wmic.exe
Token: SeManageVolumePrivilege	1512	wmic.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 960 wrote to memory of 4040	960	lol.exe	88
PID 960 wrote to memory of 4040	960	lol.exe	88
PID 960 wrote to memory of 1836	960	lol.exe	90
PID 960 wrote to memory of 1836	960	lol.exe	90
PID 960 wrote to memory of 536	960	lol.exe	92
PID 960 wrote to memory of 536	960	lol.exe	92
PID 960 wrote to memory of 436	960	lol.exe	94
PID 960 wrote to memory of 436	960	lol.exe	94
PID 960 wrote to memory of 2168	960	lol.exe	96
PID 960 wrote to memory of 2168	960	lol.exe	96
PID 960 wrote to memory of 1088	960	lol.exe	100
PID 960 wrote to memory of 1088	960	lol.exe	100
PID 960 wrote to memory of 1512	960	lol.exe	104
PID 960 wrote to memory of 1512	960	lol.exe	104
PID 960 wrote to memory of 2952	960	lol.exe	106
PID 960 wrote to memory of 2952	960	lol.exe	106
PID 960 wrote to memory of 3976	960	lol.exe	108
PID 960 wrote to memory of 3976	960	lol.exe	108
PID 960 wrote to memory of 3720	960	lol.exe	110
PID 960 wrote to memory of 3720	960	lol.exe	110
PID 960 wrote to memory of 2320	960	lol.exe	115
PID 960 wrote to memory of 2320	960	lol.exe	115
PID 2320 wrote to memory of 3736	2320	cmd.exe	117
PID 2320 wrote to memory of 3736	2320	cmd.exe	117

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4040	attrib.exe

C:\Users\Admin\AppData\Local\Temp\lol.exe
"C:\Users\Admin\AppData\Local\Temp\lol.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:960
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\lol.exe"
  2⤵
  - Views/modifies file attributes
  PID:4040
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\lol.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1836
- 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:536
- 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:436
- 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:2168
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1088
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1512
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2952
- 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:3976
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:3720
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\lol.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2320
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:3736

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

powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Size 2KB
SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
MD5 d85ba6ff808d9e5444a4b369f5bc2730
SHA1 31aa9d96590fff6981b315e0b391b575e4c0804a
SHA512 8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d
MD5 6d3e9c29fe44e90aae6ed30ccf799ca8
SHA1 c7974ef72264bbdf13a2793ccf1aed11bc565dce
SHA512 60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 948B
SHA256 4640ba4001fd16a593315299cbdd4988dc2c7075820687f1018aac40aca95c26
MD5 c65738617888921a153bd9b1ef516ee7
SHA1 5245e71ea3c181d76320c857b639272ac9e079b1
SHA512 2e2a0ebd93f9d8dd07a7599054bce232683e9add9a35e77b584618040bcfd84a42545352519ec4736cc379002210b6f3ed2d905591c6925c0981b0392b495bfa
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 93cf99b87df289b80cc8be11623fbb0b09812f2dcee9986e76cedb188ca942a0
MD5 2a75c2057536d71d287d7cefff04eec3
SHA1 c61131dee25db97244118daaf982c0bd1389b8b4
SHA512 1d8877aeade86757fb7d37b54abf27e8d6579a7a51bcbba549bcfd0c66a2b4383ab7f34eb4621c031262df4e5266332e1427f64af268922e24c24ed9ca94f150
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 9dc08df6cd84b6a9c645f81697c455080811a622a699aae94cf177a32339b8ad
MD5 f2c36eba56eb920886e708e19011cc5d
SHA1 cdf245a5777270b135c3b89eeeb6df1badf6e16e
SHA512 8409b92630fc6d1b56d2570b20f367ec9c8ddeca38067b26dd72fbe93b85275ccc7e567e652a6a7e70bc188be32095f54ac369073ae3598c29aabed0cf2786de
MD5 SHA1 SHA512

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__PSScriptPolicyTest_1edlcxmg.ytp.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1edlcxmg.ytp.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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memory/960-34-0x000001F67C190000-0x000001F67C1E0000-memory.dmp

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memory/960-2-0x00007FFC9A040000-0x00007FFC9AB01000-memory.dmp

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memory/960-94-0x00007FFC9A040000-0x00007FFC9AB01000-memory.dmp

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memory/960-93-0x000001F67C1E0000-0x000001F67C389000-memory.dmp

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memory/960-88-0x000001F67C1E0000-0x000001F67C389000-memory.dmp

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memory/960-33-0x000001F67C110000-0x000001F67C186000-memory.dmp

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memory/960-0-0x00007FFC9A043000-0x00007FFC9A045000-memory.dmp

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memory/960-35-0x000001F67C0F0000-0x000001F67C10E000-memory.dmp

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memory/960-1-0x000001F679970000-0x000001F6799B0000-memory.dmp

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memory/960-76-0x00007FFC9A040000-0x00007FFC9AB01000-memory.dmp

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memory/960-71-0x000001F67B720000-0x000001F67B72A000-memory.dmp

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memory/960-72-0x000001F67C090000-0x000001F67C0A2000-memory.dmp

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memory/960-75-0x00007FFC9A043000-0x00007FFC9A045000-memory.dmp

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memory/1836-11-0x000001F4B1C60000-0x000001F4B1C82000-memory.dmp

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memory/1836-3-0x00007FFC9A040000-0x00007FFC9AB01000-memory.dmp

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memory/1836-4-0x00007FFC9A040000-0x00007FFC9AB01000-memory.dmp

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memory/1836-5-0x00007FFC9A040000-0x00007FFC9AB01000-memory.dmp

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memory/1836-18-0x00007FFC9A040000-0x00007FFC9AB01000-memory.dmp

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