umbral | 80e1636664daed3c4c919584a40b1404807ff859fcb98267abdbe487c9a16c1f

Analysis

max time kernel
120s
max time network
124s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
20-02-2024 01:02

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General

Target

sinfulsassist.exe
Size

232KB
MD5

6bd66ae3d6ad55de0d3bfd026ab642f8
SHA1

b9c03630edcb053a0f14970ea7085a8a2a285d8a
SHA256

80e1636664daed3c4c919584a40b1404807ff859fcb98267abdbe487c9a16c1f
SHA512

c776fe3939329bfd47c447d069f89976acedb90853ab3d16386afab6123c7f1dfd9aadbbefa458226c4065452fdfd6d5dfc0a8162950d65818d7039ab92513fa
SSDEEP

6144:tloZMArIkd8g+EtXHkv/iD4xR8KfVealwgRj++71Nb8e1mRi:voZHL+EP8xR8KfVealwgRj++7X3

Score

10^/10

umbral spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2140-0-0x0000000000D40000-0x0000000000D80000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	sinfulsassist.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
8	discord.com
9	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
2556	wmic.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2624	powershell.exe
2816	powershell.exe
2564	powershell.exe
564	powershell.exe
1964	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2140	sinfulsassist.exe
Token: SeDebugPrivilege	2624	powershell.exe
Token: SeDebugPrivilege	2816	powershell.exe
Token: SeDebugPrivilege	2564	powershell.exe
Token: SeDebugPrivilege	564	powershell.exe
Token: SeIncreaseQuotaPrivilege	1676	wmic.exe
Token: SeSecurityPrivilege	1676	wmic.exe
Token: SeTakeOwnershipPrivilege	1676	wmic.exe
Token: SeLoadDriverPrivilege	1676	wmic.exe
Token: SeSystemProfilePrivilege	1676	wmic.exe
Token: SeSystemtimePrivilege	1676	wmic.exe
Token: SeProfSingleProcessPrivilege	1676	wmic.exe
Token: SeIncBasePriorityPrivilege	1676	wmic.exe
Token: SeCreatePagefilePrivilege	1676	wmic.exe
Token: SeBackupPrivilege	1676	wmic.exe
Token: SeRestorePrivilege	1676	wmic.exe
Token: SeShutdownPrivilege	1676	wmic.exe
Token: SeDebugPrivilege	1676	wmic.exe
Token: SeSystemEnvironmentPrivilege	1676	wmic.exe
Token: SeRemoteShutdownPrivilege	1676	wmic.exe
Token: SeUndockPrivilege	1676	wmic.exe
Token: SeManageVolumePrivilege	1676	wmic.exe
Token: 33	1676	wmic.exe
Token: 34	1676	wmic.exe
Token: 35	1676	wmic.exe
Token: SeIncreaseQuotaPrivilege	1676	wmic.exe
Token: SeSecurityPrivilege	1676	wmic.exe
Token: SeTakeOwnershipPrivilege	1676	wmic.exe
Token: SeLoadDriverPrivilege	1676	wmic.exe
Token: SeSystemProfilePrivilege	1676	wmic.exe
Token: SeSystemtimePrivilege	1676	wmic.exe
Token: SeProfSingleProcessPrivilege	1676	wmic.exe
Token: SeIncBasePriorityPrivilege	1676	wmic.exe
Token: SeCreatePagefilePrivilege	1676	wmic.exe
Token: SeBackupPrivilege	1676	wmic.exe
Token: SeRestorePrivilege	1676	wmic.exe
Token: SeShutdownPrivilege	1676	wmic.exe
Token: SeDebugPrivilege	1676	wmic.exe
Token: SeSystemEnvironmentPrivilege	1676	wmic.exe
Token: SeRemoteShutdownPrivilege	1676	wmic.exe
Token: SeUndockPrivilege	1676	wmic.exe
Token: SeManageVolumePrivilege	1676	wmic.exe
Token: 33	1676	wmic.exe
Token: 34	1676	wmic.exe
Token: 35	1676	wmic.exe
Token: SeIncreaseQuotaPrivilege	1748	wmic.exe
Token: SeSecurityPrivilege	1748	wmic.exe
Token: SeTakeOwnershipPrivilege	1748	wmic.exe
Token: SeLoadDriverPrivilege	1748	wmic.exe
Token: SeSystemProfilePrivilege	1748	wmic.exe
Token: SeSystemtimePrivilege	1748	wmic.exe
Token: SeProfSingleProcessPrivilege	1748	wmic.exe
Token: SeIncBasePriorityPrivilege	1748	wmic.exe
Token: SeCreatePagefilePrivilege	1748	wmic.exe
Token: SeBackupPrivilege	1748	wmic.exe
Token: SeRestorePrivilege	1748	wmic.exe
Token: SeShutdownPrivilege	1748	wmic.exe
Token: SeDebugPrivilege	1748	wmic.exe
Token: SeSystemEnvironmentPrivilege	1748	wmic.exe
Token: SeRemoteShutdownPrivilege	1748	wmic.exe
Token: SeUndockPrivilege	1748	wmic.exe
Token: SeManageVolumePrivilege	1748	wmic.exe
Token: 33	1748	wmic.exe
Token: 34	1748	wmic.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 2140 wrote to memory of 2624	2140	sinfulsassist.exe	28
PID 2140 wrote to memory of 2624	2140	sinfulsassist.exe	28
PID 2140 wrote to memory of 2624	2140	sinfulsassist.exe	28
PID 2140 wrote to memory of 2816	2140	sinfulsassist.exe	31
PID 2140 wrote to memory of 2816	2140	sinfulsassist.exe	31
PID 2140 wrote to memory of 2816	2140	sinfulsassist.exe	31
PID 2140 wrote to memory of 2564	2140	sinfulsassist.exe	33
PID 2140 wrote to memory of 2564	2140	sinfulsassist.exe	33
PID 2140 wrote to memory of 2564	2140	sinfulsassist.exe	33
PID 2140 wrote to memory of 564	2140	sinfulsassist.exe	34
PID 2140 wrote to memory of 564	2140	sinfulsassist.exe	34
PID 2140 wrote to memory of 564	2140	sinfulsassist.exe	34
PID 2140 wrote to memory of 1676	2140	sinfulsassist.exe	36
PID 2140 wrote to memory of 1676	2140	sinfulsassist.exe	36
PID 2140 wrote to memory of 1676	2140	sinfulsassist.exe	36
PID 2140 wrote to memory of 1748	2140	sinfulsassist.exe	39
PID 2140 wrote to memory of 1748	2140	sinfulsassist.exe	39
PID 2140 wrote to memory of 1748	2140	sinfulsassist.exe	39
PID 2140 wrote to memory of 1260	2140	sinfulsassist.exe	42
PID 2140 wrote to memory of 1260	2140	sinfulsassist.exe	42
PID 2140 wrote to memory of 1260	2140	sinfulsassist.exe	42
PID 2140 wrote to memory of 1964	2140	sinfulsassist.exe	44
PID 2140 wrote to memory of 1964	2140	sinfulsassist.exe	44
PID 2140 wrote to memory of 1964	2140	sinfulsassist.exe	44
PID 2140 wrote to memory of 2556	2140	sinfulsassist.exe	45
PID 2140 wrote to memory of 2556	2140	sinfulsassist.exe	45
PID 2140 wrote to memory of 2556	2140	sinfulsassist.exe	45

C:\Users\Admin\AppData\Local\Temp\sinfulsassist.exe
"C:\Users\Admin\AppData\Local\Temp\sinfulsassist.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2140
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\sinfulsassist.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2624
- 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⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2816
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2564
- 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:564
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1676
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1748
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1260
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:1964
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2556

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

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

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\66OYZ71L0O7EHIEZJ9V9.temp

Filesize
7KB

MD5
6e15b47f1bed1dba9153b6b79cbb8911

SHA1
f59ab4151df8d92ad89f35e458948646d66ca074

SHA256
cb0ea7946e29aba4ce6249e51a0638276373e4730e1b1b69d5b100d8ada35b77

SHA512
976abc8d5109b9d927585263cebab816188c7cf4ec6654f044fad98bbd9da450fce63762edcd1d3f411011e5b2cc020a7f7d876ac3ce65c7a0984d8e03218aa7

Download Submit
memory/564-59-0x00000000028D0000-0x0000000002950000-memory.dmp

Filesize
512KB

Download
memory/564-56-0x00000000028D0000-0x0000000002950000-memory.dmp

Filesize
512KB

Download
memory/564-62-0x000007FEEDAC0000-0x000007FEEE45D000-memory.dmp

Filesize
9.6MB

Download
memory/564-61-0x00000000028D0000-0x0000000002950000-memory.dmp

Filesize
512KB

Download
memory/564-60-0x00000000028D0000-0x0000000002950000-memory.dmp

Filesize
512KB

Download
memory/564-57-0x000007FEEDAC0000-0x000007FEEE45D000-memory.dmp

Filesize
9.6MB

Download
memory/564-55-0x000007FEEDAC0000-0x000007FEEE45D000-memory.dmp

Filesize
9.6MB

Download
memory/1964-79-0x000007FEEE260000-0x000007FEEEBFD000-memory.dmp

Filesize
9.6MB

Download
memory/1964-75-0x000007FEEE260000-0x000007FEEEBFD000-memory.dmp

Filesize
9.6MB

Download
memory/1964-72-0x000000001B2D0000-0x000000001B5B2000-memory.dmp

Filesize
2.9MB

Download
memory/1964-73-0x000007FEEE260000-0x000007FEEEBFD000-memory.dmp

Filesize
9.6MB

Download
memory/1964-78-0x00000000029C0000-0x0000000002A40000-memory.dmp

Filesize
512KB

Download
memory/1964-77-0x00000000029C0000-0x0000000002A40000-memory.dmp

Filesize
512KB

Download
memory/1964-76-0x00000000029C0000-0x0000000002A40000-memory.dmp

Filesize
512KB

Download
memory/1964-74-0x00000000029C0000-0x0000000002A40000-memory.dmp

Filesize
512KB

Download
memory/2140-58-0x000007FEF59B0000-0x000007FEF639C000-memory.dmp

Filesize
9.9MB

Download
memory/2140-2-0x000000001B1F0000-0x000000001B270000-memory.dmp

Filesize
512KB

Download
memory/2140-83-0x000007FEF59B0000-0x000007FEF639C000-memory.dmp

Filesize
9.9MB

Download
memory/2140-66-0x000000001B1F0000-0x000000001B270000-memory.dmp

Filesize
512KB

Download
memory/2140-0-0x0000000000D40000-0x0000000000D80000-memory.dmp

Filesize
256KB

Download
memory/2140-1-0x000007FEF59B0000-0x000007FEF639C000-memory.dmp

Filesize
9.9MB

Download
memory/2564-47-0x00000000026E0000-0x0000000002760000-memory.dmp

Filesize
512KB

Download
memory/2564-44-0x000007FEEE460000-0x000007FEEEDFD000-memory.dmp

Filesize
9.6MB

Download
memory/2564-46-0x000007FEEE460000-0x000007FEEEDFD000-memory.dmp

Filesize
9.6MB

Download
memory/2564-45-0x00000000026E0000-0x0000000002760000-memory.dmp

Filesize
512KB

Download
memory/2564-48-0x00000000026E0000-0x0000000002760000-memory.dmp

Filesize
512KB

Download
memory/2564-49-0x000007FEEE460000-0x000007FEEEDFD000-memory.dmp

Filesize
9.6MB

Download
memory/2624-10-0x00000000024D0000-0x0000000002550000-memory.dmp

Filesize
512KB

Download
memory/2624-13-0x00000000024D0000-0x0000000002550000-memory.dmp

Filesize
512KB

Download
memory/2624-11-0x000007FEEE460000-0x000007FEEEDFD000-memory.dmp

Filesize
9.6MB

Download
memory/2624-14-0x00000000024D4000-0x00000000024D7000-memory.dmp

Filesize
12KB

Download
memory/2624-15-0x000007FEEE460000-0x000007FEEEDFD000-memory.dmp

Filesize
9.6MB

Download
memory/2624-9-0x000007FEEE460000-0x000007FEEEDFD000-memory.dmp

Filesize
9.6MB

Download
memory/2624-7-0x000000001B190000-0x000000001B472000-memory.dmp

Filesize
2.9MB

Download
memory/2624-8-0x0000000002310000-0x0000000002318000-memory.dmp

Filesize
32KB

Download
memory/2624-12-0x00000000024D0000-0x0000000002550000-memory.dmp

Filesize
512KB

Download
memory/2816-28-0x0000000002500000-0x0000000002580000-memory.dmp

Filesize
512KB

Download
memory/2816-26-0x0000000002500000-0x0000000002580000-memory.dmp

Filesize
512KB

Download
memory/2816-25-0x000007FEEDAC0000-0x000007FEEE45D000-memory.dmp

Filesize
9.6MB

Download
memory/2816-24-0x0000000002500000-0x0000000002580000-memory.dmp

Filesize
512KB

Download
memory/2816-22-0x0000000002290000-0x0000000002298000-memory.dmp

Filesize
32KB

Download
memory/2816-23-0x000007FEEDAC0000-0x000007FEEE45D000-memory.dmp

Filesize
9.6MB

Download
memory/2816-21-0x000000001B1F0000-0x000000001B4D2000-memory.dmp

Filesize
2.9MB

Download
memory/2816-27-0x0000000002500000-0x0000000002580000-memory.dmp

Filesize
512KB

Download
memory/2816-29-0x000007FEEDAC0000-0x000007FEEE45D000-memory.dmp

Filesize
9.6MB

Download