umbral | 8b8e99eb8ab351e0c1d45aac62784d4e941eb4816ec00736704c564c670555da

Analysis

max time kernel
21s
max time network
26s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
07-09-2024 19:53

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General

Target

upx.exe
Size

232KB
MD5

4f64d4d9289bdfcf55fe7a4de0e07f27
SHA1

9981fb1876461216a376558f41fa67ba4bc64aba
SHA256

8b8e99eb8ab351e0c1d45aac62784d4e941eb4816ec00736704c564c670555da
SHA512

78a60559439a7b0d16fcb926c8ba16531cbaf34fdc47f0abdc236921e6f196fe829118cd8ee252c3699486a849a5ffcb2744f3ef802ed8f39369388f1b9c326b
SSDEEP

6144:9loZM+rIkd8g+EtXHkv/iD43jn0BPUon4WvRsY90vb8e1mnxFi:foZtL+EP83jn0BPUon4WvRsY9uYm

Score

10^/10

umbral credential_access execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/4956-1-0x0000026998280000-0x00000269982C0000-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

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

execution

PowerShell

T1059.001

pid	Process
4092	powershell.exe
3180	powershell.exe
1620	powershell.exe
2000	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	upx.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
28	discord.com
29	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
9	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2812	wmic.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
4956	upx.exe
4092	powershell.exe
4092	powershell.exe
3180	powershell.exe
3180	powershell.exe
1620	powershell.exe
1620	powershell.exe
2488	powershell.exe
2488	powershell.exe
2000	powershell.exe
2000	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4956	upx.exe
Token: SeIncreaseQuotaPrivilege	2728	wmic.exe
Token: SeSecurityPrivilege	2728	wmic.exe
Token: SeTakeOwnershipPrivilege	2728	wmic.exe
Token: SeLoadDriverPrivilege	2728	wmic.exe
Token: SeSystemProfilePrivilege	2728	wmic.exe
Token: SeSystemtimePrivilege	2728	wmic.exe
Token: SeProfSingleProcessPrivilege	2728	wmic.exe
Token: SeIncBasePriorityPrivilege	2728	wmic.exe
Token: SeCreatePagefilePrivilege	2728	wmic.exe
Token: SeBackupPrivilege	2728	wmic.exe
Token: SeRestorePrivilege	2728	wmic.exe
Token: SeShutdownPrivilege	2728	wmic.exe
Token: SeDebugPrivilege	2728	wmic.exe
Token: SeSystemEnvironmentPrivilege	2728	wmic.exe
Token: SeRemoteShutdownPrivilege	2728	wmic.exe
Token: SeUndockPrivilege	2728	wmic.exe
Token: SeManageVolumePrivilege	2728	wmic.exe
Token: 33	2728	wmic.exe
Token: 34	2728	wmic.exe
Token: 35	2728	wmic.exe
Token: 36	2728	wmic.exe
Token: SeIncreaseQuotaPrivilege	2728	wmic.exe
Token: SeSecurityPrivilege	2728	wmic.exe
Token: SeTakeOwnershipPrivilege	2728	wmic.exe
Token: SeLoadDriverPrivilege	2728	wmic.exe
Token: SeSystemProfilePrivilege	2728	wmic.exe
Token: SeSystemtimePrivilege	2728	wmic.exe
Token: SeProfSingleProcessPrivilege	2728	wmic.exe
Token: SeIncBasePriorityPrivilege	2728	wmic.exe
Token: SeCreatePagefilePrivilege	2728	wmic.exe
Token: SeBackupPrivilege	2728	wmic.exe
Token: SeRestorePrivilege	2728	wmic.exe
Token: SeShutdownPrivilege	2728	wmic.exe
Token: SeDebugPrivilege	2728	wmic.exe
Token: SeSystemEnvironmentPrivilege	2728	wmic.exe
Token: SeRemoteShutdownPrivilege	2728	wmic.exe
Token: SeUndockPrivilege	2728	wmic.exe
Token: SeManageVolumePrivilege	2728	wmic.exe
Token: 33	2728	wmic.exe
Token: 34	2728	wmic.exe
Token: 35	2728	wmic.exe
Token: 36	2728	wmic.exe
Token: SeDebugPrivilege	4092	powershell.exe
Token: SeDebugPrivilege	3180	powershell.exe
Token: SeDebugPrivilege	1620	powershell.exe
Token: SeDebugPrivilege	2488	powershell.exe
Token: SeIncreaseQuotaPrivilege	1576	wmic.exe
Token: SeSecurityPrivilege	1576	wmic.exe
Token: SeTakeOwnershipPrivilege	1576	wmic.exe
Token: SeLoadDriverPrivilege	1576	wmic.exe
Token: SeSystemProfilePrivilege	1576	wmic.exe
Token: SeSystemtimePrivilege	1576	wmic.exe
Token: SeProfSingleProcessPrivilege	1576	wmic.exe
Token: SeIncBasePriorityPrivilege	1576	wmic.exe
Token: SeCreatePagefilePrivilege	1576	wmic.exe
Token: SeBackupPrivilege	1576	wmic.exe
Token: SeRestorePrivilege	1576	wmic.exe
Token: SeShutdownPrivilege	1576	wmic.exe
Token: SeDebugPrivilege	1576	wmic.exe
Token: SeSystemEnvironmentPrivilege	1576	wmic.exe
Token: SeRemoteShutdownPrivilege	1576	wmic.exe
Token: SeUndockPrivilege	1576	wmic.exe
Token: SeManageVolumePrivilege	1576	wmic.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 4956 wrote to memory of 2728	4956	upx.exe	88
PID 4956 wrote to memory of 2728	4956	upx.exe	88
PID 4956 wrote to memory of 2148	4956	upx.exe	91
PID 4956 wrote to memory of 2148	4956	upx.exe	91
PID 4956 wrote to memory of 4092	4956	upx.exe	93
PID 4956 wrote to memory of 4092	4956	upx.exe	93
PID 4956 wrote to memory of 3180	4956	upx.exe	95
PID 4956 wrote to memory of 3180	4956	upx.exe	95
PID 4956 wrote to memory of 1620	4956	upx.exe	97
PID 4956 wrote to memory of 1620	4956	upx.exe	97
PID 4956 wrote to memory of 2488	4956	upx.exe	99
PID 4956 wrote to memory of 2488	4956	upx.exe	99
PID 4956 wrote to memory of 1576	4956	upx.exe	101
PID 4956 wrote to memory of 1576	4956	upx.exe	101
PID 4956 wrote to memory of 3696	4956	upx.exe	103
PID 4956 wrote to memory of 3696	4956	upx.exe	103
PID 4956 wrote to memory of 2412	4956	upx.exe	105
PID 4956 wrote to memory of 2412	4956	upx.exe	105
PID 4956 wrote to memory of 2000	4956	upx.exe	107
PID 4956 wrote to memory of 2000	4956	upx.exe	107
PID 4956 wrote to memory of 2812	4956	upx.exe	109
PID 4956 wrote to memory of 2812	4956	upx.exe	109

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2148	attrib.exe

C:\Users\Admin\AppData\Local\Temp\upx.exe
"C:\Users\Admin\AppData\Local\Temp\upx.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4956
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2728
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\upx.exe"
  2⤵
  - Views/modifies file attributes
  PID:2148
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\upx.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4092
- 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:3180
- 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:1620
- 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:2488
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1576
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:3696
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2412
- 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:2000
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2812

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

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
e136966aba3500e5d57bcfc57edb3be1

SHA1
3dc5f1c1888b68da52706fb5fb053a86d5ac4c8d

SHA256
55f1c311ffec50f6d364764298fcb3172f034ad47b32eea2941bdaab95e369b0

SHA512
118f09f6b0a690641abbae52d5e4fa71493553eadcaee9639e59d671ce64576709b3ec3d94e9cfd066f94774590f76de0796d503c73e432f0f3412f5a97aed81

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
cc8814dc68f254db2e7135650771cb11

SHA1
61657637e0856ae93e26ce8278d48fa526e52b93

SHA256
cb7da4457911da603a56a968e987165d92355926e2e21b4bf77493238baffa42

SHA512
1acc574160a8a7965372dba354ecab57d419c51e3b4587aa09af051eb5736322aa9b047816da10c38ae681af4d28c93ca873620253e3d2e1c7f099b4fb873ba6

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_pt1etc05.o0y.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/4092-4-0x00007FFCFF490000-0x00007FFCFFF51000-memory.dmp

Filesize
10.8MB

Download
memory/4092-14-0x00007FFCFF490000-0x00007FFCFFF51000-memory.dmp

Filesize
10.8MB

Download
memory/4092-15-0x00007FFCFF490000-0x00007FFCFFF51000-memory.dmp

Filesize
10.8MB

Download
memory/4092-18-0x00007FFCFF490000-0x00007FFCFFF51000-memory.dmp

Filesize
10.8MB

Download
memory/4092-3-0x0000028D4A210000-0x0000028D4A232000-memory.dmp

Filesize
136KB

Download
memory/4956-34-0x00000269B29C0000-0x00000269B2A10000-memory.dmp

Filesize
320KB

Download
memory/4956-33-0x00000269B2A40000-0x00000269B2AB6000-memory.dmp

Filesize
472KB

Download
memory/4956-35-0x0000026999F00000-0x0000026999F1E000-memory.dmp

Filesize
120KB

Download
memory/4956-0-0x00007FFCFF493000-0x00007FFCFF495000-memory.dmp

Filesize
8KB

Download
memory/4956-1-0x0000026998280000-0x00000269982C0000-memory.dmp

Filesize
256KB

Download
memory/4956-71-0x00000269B2720000-0x00000269B272A000-memory.dmp

Filesize
40KB

Download
memory/4956-72-0x00000269B2750000-0x00000269B2762000-memory.dmp

Filesize
72KB

Download
memory/4956-75-0x00007FFCFF493000-0x00007FFCFF495000-memory.dmp

Filesize
8KB

Download
memory/4956-76-0x00007FFCFF490000-0x00007FFCFFF51000-memory.dmp

Filesize
10.8MB

Download
memory/4956-2-0x00007FFCFF490000-0x00007FFCFFF51000-memory.dmp

Filesize
10.8MB

Download