umbral | 91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9

Analysis

max time kernel
120s
max time network
121s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
30-07-2024 03:49

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General

Target

91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9.exe
Size

231KB
MD5

4889fe4c6bc9c53e9e53983517727fa8
SHA1

3964bac164a7cdc3a0cddd46f8d3aab5e568b515
SHA256

91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9
SHA512

f44368d7406db49db31b13f578e968a053e100d49cd2dbf05dabe3a4f3e9412e8fd2ce6ac0c363f34091f5e7af78769ca0cc1b6020f7e8e9a313813a575c7100
SSDEEP

6144:BloZM0rIkd8g+EtXHkv/iD4i/QClL8e1m+cOi:zoZDL+EP8IpHE

Score

10^/10

umbral credential_access execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2528-1-0x0000000000B00000-0x0000000000B40000-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
2800	powershell.exe
1092	powershell.exe
2924	powershell.exe
2020	powershell.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
9	discord.com
10	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

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1916	wmic.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2528	91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9.exe
2800	powershell.exe
1092	powershell.exe
2924	powershell.exe
2144	powershell.exe
2020	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2528	91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9.exe
Token: SeIncreaseQuotaPrivilege	2404	wmic.exe
Token: SeSecurityPrivilege	2404	wmic.exe
Token: SeTakeOwnershipPrivilege	2404	wmic.exe
Token: SeLoadDriverPrivilege	2404	wmic.exe
Token: SeSystemProfilePrivilege	2404	wmic.exe
Token: SeSystemtimePrivilege	2404	wmic.exe
Token: SeProfSingleProcessPrivilege	2404	wmic.exe
Token: SeIncBasePriorityPrivilege	2404	wmic.exe
Token: SeCreatePagefilePrivilege	2404	wmic.exe
Token: SeBackupPrivilege	2404	wmic.exe
Token: SeRestorePrivilege	2404	wmic.exe
Token: SeShutdownPrivilege	2404	wmic.exe
Token: SeDebugPrivilege	2404	wmic.exe
Token: SeSystemEnvironmentPrivilege	2404	wmic.exe
Token: SeRemoteShutdownPrivilege	2404	wmic.exe
Token: SeUndockPrivilege	2404	wmic.exe
Token: SeManageVolumePrivilege	2404	wmic.exe
Token: 33	2404	wmic.exe
Token: 34	2404	wmic.exe
Token: 35	2404	wmic.exe
Token: SeIncreaseQuotaPrivilege	2404	wmic.exe
Token: SeSecurityPrivilege	2404	wmic.exe
Token: SeTakeOwnershipPrivilege	2404	wmic.exe
Token: SeLoadDriverPrivilege	2404	wmic.exe
Token: SeSystemProfilePrivilege	2404	wmic.exe
Token: SeSystemtimePrivilege	2404	wmic.exe
Token: SeProfSingleProcessPrivilege	2404	wmic.exe
Token: SeIncBasePriorityPrivilege	2404	wmic.exe
Token: SeCreatePagefilePrivilege	2404	wmic.exe
Token: SeBackupPrivilege	2404	wmic.exe
Token: SeRestorePrivilege	2404	wmic.exe
Token: SeShutdownPrivilege	2404	wmic.exe
Token: SeDebugPrivilege	2404	wmic.exe
Token: SeSystemEnvironmentPrivilege	2404	wmic.exe
Token: SeRemoteShutdownPrivilege	2404	wmic.exe
Token: SeUndockPrivilege	2404	wmic.exe
Token: SeManageVolumePrivilege	2404	wmic.exe
Token: 33	2404	wmic.exe
Token: 34	2404	wmic.exe
Token: 35	2404	wmic.exe
Token: SeDebugPrivilege	2800	powershell.exe
Token: SeDebugPrivilege	1092	powershell.exe
Token: SeDebugPrivilege	2924	powershell.exe
Token: SeDebugPrivilege	2144	powershell.exe
Token: SeIncreaseQuotaPrivilege	2828	wmic.exe
Token: SeSecurityPrivilege	2828	wmic.exe
Token: SeTakeOwnershipPrivilege	2828	wmic.exe
Token: SeLoadDriverPrivilege	2828	wmic.exe
Token: SeSystemProfilePrivilege	2828	wmic.exe
Token: SeSystemtimePrivilege	2828	wmic.exe
Token: SeProfSingleProcessPrivilege	2828	wmic.exe
Token: SeIncBasePriorityPrivilege	2828	wmic.exe
Token: SeCreatePagefilePrivilege	2828	wmic.exe
Token: SeBackupPrivilege	2828	wmic.exe
Token: SeRestorePrivilege	2828	wmic.exe
Token: SeShutdownPrivilege	2828	wmic.exe
Token: SeDebugPrivilege	2828	wmic.exe
Token: SeSystemEnvironmentPrivilege	2828	wmic.exe
Token: SeRemoteShutdownPrivilege	2828	wmic.exe
Token: SeUndockPrivilege	2828	wmic.exe
Token: SeManageVolumePrivilege	2828	wmic.exe
Token: 33	2828	wmic.exe
Token: 34	2828	wmic.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2528 wrote to memory of 2404	2528	91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9.exe	31
PID 2528 wrote to memory of 2404	2528	91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9.exe	31
PID 2528 wrote to memory of 2404	2528	91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9.exe	31
PID 2528 wrote to memory of 2800	2528	91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9.exe	34
PID 2528 wrote to memory of 2800	2528	91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9.exe	34
PID 2528 wrote to memory of 2800	2528	91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9.exe	34
PID 2528 wrote to memory of 1092	2528	91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9.exe	36
PID 2528 wrote to memory of 1092	2528	91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9.exe	36
PID 2528 wrote to memory of 1092	2528	91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9.exe	36
PID 2528 wrote to memory of 2924	2528	91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9.exe	38
PID 2528 wrote to memory of 2924	2528	91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9.exe	38
PID 2528 wrote to memory of 2924	2528	91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9.exe	38
PID 2528 wrote to memory of 2144	2528	91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9.exe	40
PID 2528 wrote to memory of 2144	2528	91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9.exe	40
PID 2528 wrote to memory of 2144	2528	91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9.exe	40
PID 2528 wrote to memory of 2828	2528	91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9.exe	42
PID 2528 wrote to memory of 2828	2528	91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9.exe	42
PID 2528 wrote to memory of 2828	2528	91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9.exe	42
PID 2528 wrote to memory of 2968	2528	91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9.exe	44
PID 2528 wrote to memory of 2968	2528	91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9.exe	44
PID 2528 wrote to memory of 2968	2528	91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9.exe	44
PID 2528 wrote to memory of 2836	2528	91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9.exe	46
PID 2528 wrote to memory of 2836	2528	91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9.exe	46
PID 2528 wrote to memory of 2836	2528	91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9.exe	46
PID 2528 wrote to memory of 2020	2528	91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9.exe	48
PID 2528 wrote to memory of 2020	2528	91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9.exe	48
PID 2528 wrote to memory of 2020	2528	91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9.exe	48
PID 2528 wrote to memory of 1916	2528	91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9.exe	50
PID 2528 wrote to memory of 1916	2528	91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9.exe	50
PID 2528 wrote to memory of 1916	2528	91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9.exe	50

C:\Users\Admin\AppData\Local\Temp\91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9.exe
"C:\Users\Admin\AppData\Local\Temp\91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2528
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2404
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\91a8f24b813ec8f33e1222a9996cdfe5c4c0dd56cb922a113a87953878b065a9.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2800
- 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:1092
- 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:2924
- 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:2144
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2828
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2968
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2836
- 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:2020
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1916

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

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
f7d1c5820fe1b68036817f04b27fdd41

SHA1
6b1d965d20a3234ca73475c9a926e0ffd37822d6

SHA256
faa694d266347833a31742bac04c66f69ac1c274c42eaac1f74aa76fea7af201

SHA512
a1bbb3eeff43b99f94dd13f0201a2256e8178a35aec5740531e12c82fc11bd464515518d08eda95d903345c638c79878db7784a92e19415abecd2b4124f69cb6

Download Submit
memory/1092-14-0x000000001B690000-0x000000001B972000-memory.dmp

Filesize
2.9MB

Download
memory/1092-15-0x00000000023C0000-0x00000000023C8000-memory.dmp

Filesize
32KB

Download
memory/2020-41-0x0000000002860000-0x0000000002868000-memory.dmp

Filesize
32KB

Download
memory/2528-0-0x000007FEF6563000-0x000007FEF6564000-memory.dmp

Filesize
4KB

Download
memory/2528-1-0x0000000000B00000-0x0000000000B40000-memory.dmp

Filesize
256KB

Download
memory/2528-2-0x000007FEF6560000-0x000007FEF6F4C000-memory.dmp

Filesize
9.9MB

Download
memory/2528-45-0x000007FEF6560000-0x000007FEF6F4C000-memory.dmp

Filesize
9.9MB

Download
memory/2800-7-0x000000001B500000-0x000000001B7E2000-memory.dmp

Filesize
2.9MB

Download
memory/2800-8-0x0000000002860000-0x0000000002868000-memory.dmp

Filesize
32KB

Download