umbral | dc1fd062f4b5dedf2e3c9e3a50f2c0bf6d96ec83bb12f95cab6cf47c395994b4

Analysis

max time kernel
4s
max time network
8s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
20-12-2024 11:48

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General

Target

Crack.exe
Size

229KB
MD5

54a4fef24ac2c3ee74b2999530825faa
SHA1

c03fd109fe013c11a780120841b2441fb747cf51
SHA256

766d71850cce1d3ce7ccecd302b3ff2049e765e48cbd69c53b4f122754a7f14f
SHA512

97a5d1dd811a51200115a3f878940f4fd6ac8bd1dbf6081c251290aeec6962d277f48c02075aefbcfa672805bf4921c8a8c2abfa0bf20e76bf13c6c6738a8419
SSDEEP

6144:9loZM+rIkd8g+EtXHkv/iD4AvO18il92ADe8NhoKub8e1mCi:foZtL+EP8AvO18il92ADe8Nhohs

Score

10^/10

umbral execution stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/1152-1-0x0000000000100000-0x0000000000140000-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 2 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2852	powershell.exe
2804	powershell.exe

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

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1152	Crack.exe
2804	powershell.exe

Suspicious use of AdjustPrivilegeToken 42 IoCs

description	pid	Process
Token: SeDebugPrivilege	1152	Crack.exe
Token: SeIncreaseQuotaPrivilege	2384	wmic.exe
Token: SeSecurityPrivilege	2384	wmic.exe
Token: SeTakeOwnershipPrivilege	2384	wmic.exe
Token: SeLoadDriverPrivilege	2384	wmic.exe
Token: SeSystemProfilePrivilege	2384	wmic.exe
Token: SeSystemtimePrivilege	2384	wmic.exe
Token: SeProfSingleProcessPrivilege	2384	wmic.exe
Token: SeIncBasePriorityPrivilege	2384	wmic.exe
Token: SeCreatePagefilePrivilege	2384	wmic.exe
Token: SeBackupPrivilege	2384	wmic.exe
Token: SeRestorePrivilege	2384	wmic.exe
Token: SeShutdownPrivilege	2384	wmic.exe
Token: SeDebugPrivilege	2384	wmic.exe
Token: SeSystemEnvironmentPrivilege	2384	wmic.exe
Token: SeRemoteShutdownPrivilege	2384	wmic.exe
Token: SeUndockPrivilege	2384	wmic.exe
Token: SeManageVolumePrivilege	2384	wmic.exe
Token: 33	2384	wmic.exe
Token: 34	2384	wmic.exe
Token: 35	2384	wmic.exe
Token: SeIncreaseQuotaPrivilege	2384	wmic.exe
Token: SeSecurityPrivilege	2384	wmic.exe
Token: SeTakeOwnershipPrivilege	2384	wmic.exe
Token: SeLoadDriverPrivilege	2384	wmic.exe
Token: SeSystemProfilePrivilege	2384	wmic.exe
Token: SeSystemtimePrivilege	2384	wmic.exe
Token: SeProfSingleProcessPrivilege	2384	wmic.exe
Token: SeIncBasePriorityPrivilege	2384	wmic.exe
Token: SeCreatePagefilePrivilege	2384	wmic.exe
Token: SeBackupPrivilege	2384	wmic.exe
Token: SeRestorePrivilege	2384	wmic.exe
Token: SeShutdownPrivilege	2384	wmic.exe
Token: SeDebugPrivilege	2384	wmic.exe
Token: SeSystemEnvironmentPrivilege	2384	wmic.exe
Token: SeRemoteShutdownPrivilege	2384	wmic.exe
Token: SeUndockPrivilege	2384	wmic.exe
Token: SeManageVolumePrivilege	2384	wmic.exe
Token: 33	2384	wmic.exe
Token: 34	2384	wmic.exe
Token: 35	2384	wmic.exe
Token: SeDebugPrivilege	2804	powershell.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1152 wrote to memory of 2384	1152	Crack.exe	30
PID 1152 wrote to memory of 2384	1152	Crack.exe	30
PID 1152 wrote to memory of 2384	1152	Crack.exe	30
PID 1152 wrote to memory of 2336	1152	Crack.exe	33
PID 1152 wrote to memory of 2336	1152	Crack.exe	33
PID 1152 wrote to memory of 2336	1152	Crack.exe	33
PID 1152 wrote to memory of 2804	1152	Crack.exe	35
PID 1152 wrote to memory of 2804	1152	Crack.exe	35
PID 1152 wrote to memory of 2804	1152	Crack.exe	35
PID 1152 wrote to memory of 2852	1152	Crack.exe	37
PID 1152 wrote to memory of 2852	1152	Crack.exe	37
PID 1152 wrote to memory of 2852	1152	Crack.exe	37

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2336	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Crack.exe
"C:\Users\Admin\AppData\Local\Temp\Crack.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1152
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2384
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Crack.exe"
  2⤵
  - Views/modifies file attributes
  PID:2336
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Crack.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2804
- 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
  PID:2852

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

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1152-0-0x000007FEF5CD3000-0x000007FEF5CD4000-memory.dmp

Filesize
4KB

Download
memory/1152-1-0x0000000000100000-0x0000000000140000-memory.dmp

Filesize
256KB

Download
memory/1152-2-0x000007FEF5CD0000-0x000007FEF66BC000-memory.dmp

Filesize
9.9MB

Download
memory/2804-7-0x000000001B6A0000-0x000000001B982000-memory.dmp

Filesize
2.9MB

Download
memory/2804-8-0x0000000002290000-0x0000000002298000-memory.dmp

Filesize
32KB

Download