umbral | 4feb640b309beb1de84d7d7b4894831692eb2e24da68fafa644ff928499d4a44

Analysis

max time kernel
109s
max time network
109s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
21-08-2024 03:03

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General

Target

7b4cd9478c848e355d91674e959c77b0N.exe
Size

229KB
MD5

7b4cd9478c848e355d91674e959c77b0
SHA1

84a02dcba4204f3732e66f62b7de540dbcbdee7b
SHA256

4feb640b309beb1de84d7d7b4894831692eb2e24da68fafa644ff928499d4a44
SHA512

500b2d38d07dd6a43a6dd7248324ff2529f130e539e104148db3a5ca0d17566138688c0df13b4aa4f77297c8579ce1961011e4977aa4d5377fcab6a207ac7457
SSDEEP

6144:9loZM3fsXtioRkts/cnnK6cMlfdxJYe5xyBXKYZd8CNub8e1mqni:foZ1tlRk83MlfdxJYe5xyBXKYZd8Cky

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/3292-1-0x000001643D2C0000-0x000001643D300000-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
4464	powershell.exe
2116	powershell.exe
1444	powershell.exe
2680	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	7b4cd9478c848e355d91674e959c77b0N.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

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
4604	cmd.exe
1212	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
3092	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1212	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
3292	7b4cd9478c848e355d91674e959c77b0N.exe
4464	powershell.exe
4464	powershell.exe
2116	powershell.exe
2116	powershell.exe
1444	powershell.exe
1444	powershell.exe
4220	powershell.exe
4220	powershell.exe
2680	powershell.exe
2680	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3292	7b4cd9478c848e355d91674e959c77b0N.exe
Token: SeIncreaseQuotaPrivilege	3108	wmic.exe
Token: SeSecurityPrivilege	3108	wmic.exe
Token: SeTakeOwnershipPrivilege	3108	wmic.exe
Token: SeLoadDriverPrivilege	3108	wmic.exe
Token: SeSystemProfilePrivilege	3108	wmic.exe
Token: SeSystemtimePrivilege	3108	wmic.exe
Token: SeProfSingleProcessPrivilege	3108	wmic.exe
Token: SeIncBasePriorityPrivilege	3108	wmic.exe
Token: SeCreatePagefilePrivilege	3108	wmic.exe
Token: SeBackupPrivilege	3108	wmic.exe
Token: SeRestorePrivilege	3108	wmic.exe
Token: SeShutdownPrivilege	3108	wmic.exe
Token: SeDebugPrivilege	3108	wmic.exe
Token: SeSystemEnvironmentPrivilege	3108	wmic.exe
Token: SeRemoteShutdownPrivilege	3108	wmic.exe
Token: SeUndockPrivilege	3108	wmic.exe
Token: SeManageVolumePrivilege	3108	wmic.exe
Token: 33	3108	wmic.exe
Token: 34	3108	wmic.exe
Token: 35	3108	wmic.exe
Token: 36	3108	wmic.exe
Token: SeIncreaseQuotaPrivilege	3108	wmic.exe
Token: SeSecurityPrivilege	3108	wmic.exe
Token: SeTakeOwnershipPrivilege	3108	wmic.exe
Token: SeLoadDriverPrivilege	3108	wmic.exe
Token: SeSystemProfilePrivilege	3108	wmic.exe
Token: SeSystemtimePrivilege	3108	wmic.exe
Token: SeProfSingleProcessPrivilege	3108	wmic.exe
Token: SeIncBasePriorityPrivilege	3108	wmic.exe
Token: SeCreatePagefilePrivilege	3108	wmic.exe
Token: SeBackupPrivilege	3108	wmic.exe
Token: SeRestorePrivilege	3108	wmic.exe
Token: SeShutdownPrivilege	3108	wmic.exe
Token: SeDebugPrivilege	3108	wmic.exe
Token: SeSystemEnvironmentPrivilege	3108	wmic.exe
Token: SeRemoteShutdownPrivilege	3108	wmic.exe
Token: SeUndockPrivilege	3108	wmic.exe
Token: SeManageVolumePrivilege	3108	wmic.exe
Token: 33	3108	wmic.exe
Token: 34	3108	wmic.exe
Token: 35	3108	wmic.exe
Token: 36	3108	wmic.exe
Token: SeDebugPrivilege	4464	powershell.exe
Token: SeDebugPrivilege	2116	powershell.exe
Token: SeDebugPrivilege	1444	powershell.exe
Token: SeDebugPrivilege	4220	powershell.exe
Token: SeIncreaseQuotaPrivilege	4368	wmic.exe
Token: SeSecurityPrivilege	4368	wmic.exe
Token: SeTakeOwnershipPrivilege	4368	wmic.exe
Token: SeLoadDriverPrivilege	4368	wmic.exe
Token: SeSystemProfilePrivilege	4368	wmic.exe
Token: SeSystemtimePrivilege	4368	wmic.exe
Token: SeProfSingleProcessPrivilege	4368	wmic.exe
Token: SeIncBasePriorityPrivilege	4368	wmic.exe
Token: SeCreatePagefilePrivilege	4368	wmic.exe
Token: SeBackupPrivilege	4368	wmic.exe
Token: SeRestorePrivilege	4368	wmic.exe
Token: SeShutdownPrivilege	4368	wmic.exe
Token: SeDebugPrivilege	4368	wmic.exe
Token: SeSystemEnvironmentPrivilege	4368	wmic.exe
Token: SeRemoteShutdownPrivilege	4368	wmic.exe
Token: SeUndockPrivilege	4368	wmic.exe
Token: SeManageVolumePrivilege	4368	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3292 wrote to memory of 3108	3292	7b4cd9478c848e355d91674e959c77b0N.exe	85
PID 3292 wrote to memory of 3108	3292	7b4cd9478c848e355d91674e959c77b0N.exe	85
PID 3292 wrote to memory of 448	3292	7b4cd9478c848e355d91674e959c77b0N.exe	90
PID 3292 wrote to memory of 448	3292	7b4cd9478c848e355d91674e959c77b0N.exe	90
PID 3292 wrote to memory of 4464	3292	7b4cd9478c848e355d91674e959c77b0N.exe	92
PID 3292 wrote to memory of 4464	3292	7b4cd9478c848e355d91674e959c77b0N.exe	92
PID 3292 wrote to memory of 2116	3292	7b4cd9478c848e355d91674e959c77b0N.exe	95
PID 3292 wrote to memory of 2116	3292	7b4cd9478c848e355d91674e959c77b0N.exe	95
PID 3292 wrote to memory of 1444	3292	7b4cd9478c848e355d91674e959c77b0N.exe	97
PID 3292 wrote to memory of 1444	3292	7b4cd9478c848e355d91674e959c77b0N.exe	97
PID 3292 wrote to memory of 4220	3292	7b4cd9478c848e355d91674e959c77b0N.exe	99
PID 3292 wrote to memory of 4220	3292	7b4cd9478c848e355d91674e959c77b0N.exe	99
PID 3292 wrote to memory of 4368	3292	7b4cd9478c848e355d91674e959c77b0N.exe	101
PID 3292 wrote to memory of 4368	3292	7b4cd9478c848e355d91674e959c77b0N.exe	101
PID 3292 wrote to memory of 1476	3292	7b4cd9478c848e355d91674e959c77b0N.exe	103
PID 3292 wrote to memory of 1476	3292	7b4cd9478c848e355d91674e959c77b0N.exe	103
PID 3292 wrote to memory of 3004	3292	7b4cd9478c848e355d91674e959c77b0N.exe	105
PID 3292 wrote to memory of 3004	3292	7b4cd9478c848e355d91674e959c77b0N.exe	105
PID 3292 wrote to memory of 2680	3292	7b4cd9478c848e355d91674e959c77b0N.exe	107
PID 3292 wrote to memory of 2680	3292	7b4cd9478c848e355d91674e959c77b0N.exe	107
PID 3292 wrote to memory of 3092	3292	7b4cd9478c848e355d91674e959c77b0N.exe	111
PID 3292 wrote to memory of 3092	3292	7b4cd9478c848e355d91674e959c77b0N.exe	111
PID 3292 wrote to memory of 4604	3292	7b4cd9478c848e355d91674e959c77b0N.exe	115
PID 3292 wrote to memory of 4604	3292	7b4cd9478c848e355d91674e959c77b0N.exe	115
PID 4604 wrote to memory of 1212	4604	cmd.exe	117
PID 4604 wrote to memory of 1212	4604	cmd.exe	117

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
448	attrib.exe

C:\Users\Admin\AppData\Local\Temp\7b4cd9478c848e355d91674e959c77b0N.exe
"C:\Users\Admin\AppData\Local\Temp\7b4cd9478c848e355d91674e959c77b0N.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3292
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3108
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\7b4cd9478c848e355d91674e959c77b0N.exe"
  2⤵
  - Views/modifies file attributes
  PID:448
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\7b4cd9478c848e355d91674e959c77b0N.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4464
- 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:2116
- 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:1444
- 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:4220
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4368
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1476
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3004
- 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:2680
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:3092
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\7b4cd9478c848e355d91674e959c77b0N.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4604
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1212

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

Exfiltration

Impact

Replay Monitor

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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
6d42b6da621e8df5674e26b799c8e2aa

SHA1
ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

SHA256
5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

SHA512
53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

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

Filesize
948B

MD5
985b3105d8889886d6fd953575c54e08

SHA1
0f9a041240a344d82bac0a180520e7982c15f3cd

SHA256
5178fdd457eb3eb25c8f72ed4c22c582a83de0d324db66d0446d660f226e944d

SHA512
0fd59bc4886b70aa3b7eeeaa23229b7fdc93410ca7f8452860e4a1bbda2559eaa5e4b05c3ec2d85f7d648daf3c16741f4c2c18f2dd3bae4cc4a4e57ae4f665b0

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
df90d53775b01ed0875c81dca33a0c35

SHA1
c48dedb031902c3b73bd0f65c3a20d30ef02042a

SHA256
af239bf9ef4f2ad19422b5ee77faa2465d9a79aaabaa19557ff08123c0357227

SHA512
68d88f8c93e42f3c7b600da67d676e46289aab0601604856d6e97bd120bffbdbfea3ac56d009c5fcbd42cc466bf1c1d3895f57876adc9e24ce440b554db8c7d6

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_l0t4enc2.x5g.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3292-71-0x00000164579B0000-0x00000164579BA000-memory.dmp

Filesize
40KB

Download
memory/3292-0-0x00007FFEC3A53000-0x00007FFEC3A55000-memory.dmp

Filesize
8KB

Download
memory/3292-93-0x00007FFEC3A50000-0x00007FFEC4511000-memory.dmp

Filesize
10.8MB

Download
memory/3292-92-0x0000016457C10000-0x0000016457DB9000-memory.dmp

Filesize
1.7MB

Download
memory/3292-2-0x00007FFEC3A50000-0x00007FFEC4511000-memory.dmp

Filesize
10.8MB

Download
memory/3292-33-0x0000016457A20000-0x0000016457A96000-memory.dmp

Filesize
472KB

Download
memory/3292-34-0x0000016457AA0000-0x0000016457AF0000-memory.dmp

Filesize
320KB

Download
memory/3292-35-0x000001643D7A0000-0x000001643D7BE000-memory.dmp

Filesize
120KB

Download
memory/3292-1-0x000001643D2C0000-0x000001643D300000-memory.dmp

Filesize
256KB

Download
memory/3292-88-0x00007FFEC3A50000-0x00007FFEC4511000-memory.dmp

Filesize
10.8MB

Download
memory/3292-87-0x00007FFEC3A53000-0x00007FFEC3A55000-memory.dmp

Filesize
8KB

Download
memory/3292-72-0x00000164579E0000-0x00000164579F2000-memory.dmp

Filesize
72KB

Download
memory/4464-14-0x00007FFEC3A50000-0x00007FFEC4511000-memory.dmp

Filesize
10.8MB

Download
memory/4464-10-0x000001EB63380000-0x000001EB633A2000-memory.dmp

Filesize
136KB

Download
memory/4464-15-0x00007FFEC3A50000-0x00007FFEC4511000-memory.dmp

Filesize
10.8MB

Download
memory/4464-3-0x00007FFEC3A50000-0x00007FFEC4511000-memory.dmp

Filesize
10.8MB

Download
memory/4464-18-0x00007FFEC3A50000-0x00007FFEC4511000-memory.dmp

Filesize
10.8MB

Download