umbral | 824d0e2ebaa40b7bca3bc0657338a13df78121172fe52e604f45c8033ab7537a

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
05-08-2024 14:25

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General

Target

MalwareBazaar.exe
Size

227KB
MD5

ef323a7483653ffb1fc4ff036576e065
SHA1

80e63b57a7ad6394f778c7aa5a855520f1533589
SHA256

824d0e2ebaa40b7bca3bc0657338a13df78121172fe52e604f45c8033ab7537a
SHA512

04785049f73acbacc2b0ea89e2bbc547ac6fa302eac4cbbd895f8d6a873c8b0dcfa8a8762d90847c9a0bf28862e12b294cb70f073019a6046bac104b9189ba7e
SSDEEP

6144:eloZM3fsXtioRkts/cnnK6cMluDdCFzQEb0CzFQMpnhb8e1msQci:IoZ1tlRk83MluDdCFzQEb0CzFQMpZ3K

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2252-1-0x00000000009D0000-0x0000000000A10000-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
2192	powershell.exe
2628	powershell.exe
2708	powershell.exe
2836	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Deletes itself 1 IoCs

pid	Process
2028	cmd.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
2028	cmd.exe
2332	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1888	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2332	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2252	MalwareBazaar.exe
2836	powershell.exe
2192	powershell.exe
2628	powershell.exe
1096	powershell.exe
2708	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2252	MalwareBazaar.exe
Token: SeIncreaseQuotaPrivilege	2556	wmic.exe
Token: SeSecurityPrivilege	2556	wmic.exe
Token: SeTakeOwnershipPrivilege	2556	wmic.exe
Token: SeLoadDriverPrivilege	2556	wmic.exe
Token: SeSystemProfilePrivilege	2556	wmic.exe
Token: SeSystemtimePrivilege	2556	wmic.exe
Token: SeProfSingleProcessPrivilege	2556	wmic.exe
Token: SeIncBasePriorityPrivilege	2556	wmic.exe
Token: SeCreatePagefilePrivilege	2556	wmic.exe
Token: SeBackupPrivilege	2556	wmic.exe
Token: SeRestorePrivilege	2556	wmic.exe
Token: SeShutdownPrivilege	2556	wmic.exe
Token: SeDebugPrivilege	2556	wmic.exe
Token: SeSystemEnvironmentPrivilege	2556	wmic.exe
Token: SeRemoteShutdownPrivilege	2556	wmic.exe
Token: SeUndockPrivilege	2556	wmic.exe
Token: SeManageVolumePrivilege	2556	wmic.exe
Token: 33	2556	wmic.exe
Token: 34	2556	wmic.exe
Token: 35	2556	wmic.exe
Token: SeIncreaseQuotaPrivilege	2556	wmic.exe
Token: SeSecurityPrivilege	2556	wmic.exe
Token: SeTakeOwnershipPrivilege	2556	wmic.exe
Token: SeLoadDriverPrivilege	2556	wmic.exe
Token: SeSystemProfilePrivilege	2556	wmic.exe
Token: SeSystemtimePrivilege	2556	wmic.exe
Token: SeProfSingleProcessPrivilege	2556	wmic.exe
Token: SeIncBasePriorityPrivilege	2556	wmic.exe
Token: SeCreatePagefilePrivilege	2556	wmic.exe
Token: SeBackupPrivilege	2556	wmic.exe
Token: SeRestorePrivilege	2556	wmic.exe
Token: SeShutdownPrivilege	2556	wmic.exe
Token: SeDebugPrivilege	2556	wmic.exe
Token: SeSystemEnvironmentPrivilege	2556	wmic.exe
Token: SeRemoteShutdownPrivilege	2556	wmic.exe
Token: SeUndockPrivilege	2556	wmic.exe
Token: SeManageVolumePrivilege	2556	wmic.exe
Token: 33	2556	wmic.exe
Token: 34	2556	wmic.exe
Token: 35	2556	wmic.exe
Token: SeDebugPrivilege	2836	powershell.exe
Token: SeDebugPrivilege	2192	powershell.exe
Token: SeDebugPrivilege	2628	powershell.exe
Token: SeDebugPrivilege	1096	powershell.exe
Token: SeIncreaseQuotaPrivilege	1752	wmic.exe
Token: SeSecurityPrivilege	1752	wmic.exe
Token: SeTakeOwnershipPrivilege	1752	wmic.exe
Token: SeLoadDriverPrivilege	1752	wmic.exe
Token: SeSystemProfilePrivilege	1752	wmic.exe
Token: SeSystemtimePrivilege	1752	wmic.exe
Token: SeProfSingleProcessPrivilege	1752	wmic.exe
Token: SeIncBasePriorityPrivilege	1752	wmic.exe
Token: SeCreatePagefilePrivilege	1752	wmic.exe
Token: SeBackupPrivilege	1752	wmic.exe
Token: SeRestorePrivilege	1752	wmic.exe
Token: SeShutdownPrivilege	1752	wmic.exe
Token: SeDebugPrivilege	1752	wmic.exe
Token: SeSystemEnvironmentPrivilege	1752	wmic.exe
Token: SeRemoteShutdownPrivilege	1752	wmic.exe
Token: SeUndockPrivilege	1752	wmic.exe
Token: SeManageVolumePrivilege	1752	wmic.exe
Token: 33	1752	wmic.exe
Token: 34	1752	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2252 wrote to memory of 2556	2252	MalwareBazaar.exe	30
PID 2252 wrote to memory of 2556	2252	MalwareBazaar.exe	30
PID 2252 wrote to memory of 2556	2252	MalwareBazaar.exe	30
PID 2252 wrote to memory of 2812	2252	MalwareBazaar.exe	33
PID 2252 wrote to memory of 2812	2252	MalwareBazaar.exe	33
PID 2252 wrote to memory of 2812	2252	MalwareBazaar.exe	33
PID 2252 wrote to memory of 2836	2252	MalwareBazaar.exe	35
PID 2252 wrote to memory of 2836	2252	MalwareBazaar.exe	35
PID 2252 wrote to memory of 2836	2252	MalwareBazaar.exe	35
PID 2252 wrote to memory of 2192	2252	MalwareBazaar.exe	37
PID 2252 wrote to memory of 2192	2252	MalwareBazaar.exe	37
PID 2252 wrote to memory of 2192	2252	MalwareBazaar.exe	37
PID 2252 wrote to memory of 2628	2252	MalwareBazaar.exe	39
PID 2252 wrote to memory of 2628	2252	MalwareBazaar.exe	39
PID 2252 wrote to memory of 2628	2252	MalwareBazaar.exe	39
PID 2252 wrote to memory of 1096	2252	MalwareBazaar.exe	41
PID 2252 wrote to memory of 1096	2252	MalwareBazaar.exe	41
PID 2252 wrote to memory of 1096	2252	MalwareBazaar.exe	41
PID 2252 wrote to memory of 1752	2252	MalwareBazaar.exe	44
PID 2252 wrote to memory of 1752	2252	MalwareBazaar.exe	44
PID 2252 wrote to memory of 1752	2252	MalwareBazaar.exe	44
PID 2252 wrote to memory of 1496	2252	MalwareBazaar.exe	46
PID 2252 wrote to memory of 1496	2252	MalwareBazaar.exe	46
PID 2252 wrote to memory of 1496	2252	MalwareBazaar.exe	46
PID 2252 wrote to memory of 1632	2252	MalwareBazaar.exe	48
PID 2252 wrote to memory of 1632	2252	MalwareBazaar.exe	48
PID 2252 wrote to memory of 1632	2252	MalwareBazaar.exe	48
PID 2252 wrote to memory of 2708	2252	MalwareBazaar.exe	50
PID 2252 wrote to memory of 2708	2252	MalwareBazaar.exe	50
PID 2252 wrote to memory of 2708	2252	MalwareBazaar.exe	50
PID 2252 wrote to memory of 1888	2252	MalwareBazaar.exe	52
PID 2252 wrote to memory of 1888	2252	MalwareBazaar.exe	52
PID 2252 wrote to memory of 1888	2252	MalwareBazaar.exe	52
PID 2252 wrote to memory of 2028	2252	MalwareBazaar.exe	54
PID 2252 wrote to memory of 2028	2252	MalwareBazaar.exe	54
PID 2252 wrote to memory of 2028	2252	MalwareBazaar.exe	54
PID 2028 wrote to memory of 2332	2028	cmd.exe	56
PID 2028 wrote to memory of 2332	2028	cmd.exe	56
PID 2028 wrote to memory of 2332	2028	cmd.exe	56

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2812	attrib.exe

C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe
"C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2252
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2556
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe"
  2⤵
  - Views/modifies file attributes
  PID:2812
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2836
- 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:2192
- 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:2628
- 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:1096
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1752
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1496
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1632
- 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:2708
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1888
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2028
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2332

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

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Downloads

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

Filesize
7KB

MD5
73bd8e60ded0b04f24dccb429f77f212

SHA1
cf080080fb90b58c1d4c426831efdae422ca24ad

SHA256
0a3441eb9d16b128b6104ace6fdc14fbe81e7487e8c81f7cfeb550fa7b4c639c

SHA512
d92e6901e59cdc9044591f8da9711fd6eb5f9acbe1fe208293e856c9d3c1d9e8bccff212d97f0e90e91294396ff56fa3e79c47f3c0f04a56a6b24f4428871fd1

Download Submit
memory/2192-14-0x000000001B770000-0x000000001BA52000-memory.dmp

Filesize
2.9MB

Download
memory/2192-15-0x0000000001E60000-0x0000000001E68000-memory.dmp

Filesize
32KB

Download
memory/2252-0-0x000007FEF50B3000-0x000007FEF50B4000-memory.dmp

Filesize
4KB

Download
memory/2252-1-0x00000000009D0000-0x0000000000A10000-memory.dmp

Filesize
256KB

Download
memory/2252-2-0x000007FEF50B0000-0x000007FEF5A9C000-memory.dmp

Filesize
9.9MB

Download
memory/2252-49-0x000007FEF50B0000-0x000007FEF5A9C000-memory.dmp

Filesize
9.9MB

Download
memory/2708-45-0x0000000001E20000-0x0000000001E28000-memory.dmp

Filesize
32KB

Download
memory/2836-7-0x000000001B680000-0x000000001B962000-memory.dmp

Filesize
2.9MB

Download
memory/2836-8-0x0000000002620000-0x0000000002628000-memory.dmp

Filesize
32KB

Download