umbral | b176f79057adf0432e8cedb42d0d2ec44ac772da03a629bd97f4febf0cb7347d

Analysis

max time kernel
13s
max time network
16s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
08-09-2024 04:25

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

Umbral (2).exe
Size

232KB
MD5

0a1a80122976fd1b62cd01889535b700
SHA1

e14b2b77529495b62f54d4ca7828acba8e3e5788
SHA256

b176f79057adf0432e8cedb42d0d2ec44ac772da03a629bd97f4febf0cb7347d
SHA512

4e9ef98911a2131681e5acf23ca1d679455374f905eb54e05f70b48d7c59098f7a6048fc89f5afdcd4570d047341490a75ceed4fd9e787f7eb18167f214d63a9
SSDEEP

6144:xloZM+rIkd8g+EtXHkv/iD42L57aMS1NmPzus9x4XNb8e1mVW3i:DoZtL+EP82L57aMS1NmPzus9x49G

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/220-1-0x000001BFB5D40000-0x000001BFB5D80000-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
316	powershell.exe
3844	powershell.exe
3208	powershell.exe
3856	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	Umbral (2).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
17	ip-api.com

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
4800	PING.EXE
4508	cmd.exe

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1680	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4800	PING.EXE

Suspicious behavior: EnumeratesProcesses 17 IoCs

pid	Process
220	Umbral (2).exe
220	Umbral (2).exe
316	powershell.exe
316	powershell.exe
316	powershell.exe
3856	powershell.exe
3856	powershell.exe
3856	powershell.exe
3844	powershell.exe
3844	powershell.exe
3844	powershell.exe
1692	powershell.exe
1692	powershell.exe
1692	powershell.exe
3208	powershell.exe
3208	powershell.exe
3208	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	220	Umbral (2).exe
Token: SeIncreaseQuotaPrivilege	3868	wmic.exe
Token: SeSecurityPrivilege	3868	wmic.exe
Token: SeTakeOwnershipPrivilege	3868	wmic.exe
Token: SeLoadDriverPrivilege	3868	wmic.exe
Token: SeSystemProfilePrivilege	3868	wmic.exe
Token: SeSystemtimePrivilege	3868	wmic.exe
Token: SeProfSingleProcessPrivilege	3868	wmic.exe
Token: SeIncBasePriorityPrivilege	3868	wmic.exe
Token: SeCreatePagefilePrivilege	3868	wmic.exe
Token: SeBackupPrivilege	3868	wmic.exe
Token: SeRestorePrivilege	3868	wmic.exe
Token: SeShutdownPrivilege	3868	wmic.exe
Token: SeDebugPrivilege	3868	wmic.exe
Token: SeSystemEnvironmentPrivilege	3868	wmic.exe
Token: SeRemoteShutdownPrivilege	3868	wmic.exe
Token: SeUndockPrivilege	3868	wmic.exe
Token: SeManageVolumePrivilege	3868	wmic.exe
Token: 33	3868	wmic.exe
Token: 34	3868	wmic.exe
Token: 35	3868	wmic.exe
Token: 36	3868	wmic.exe
Token: SeIncreaseQuotaPrivilege	3868	wmic.exe
Token: SeSecurityPrivilege	3868	wmic.exe
Token: SeTakeOwnershipPrivilege	3868	wmic.exe
Token: SeLoadDriverPrivilege	3868	wmic.exe
Token: SeSystemProfilePrivilege	3868	wmic.exe
Token: SeSystemtimePrivilege	3868	wmic.exe
Token: SeProfSingleProcessPrivilege	3868	wmic.exe
Token: SeIncBasePriorityPrivilege	3868	wmic.exe
Token: SeCreatePagefilePrivilege	3868	wmic.exe
Token: SeBackupPrivilege	3868	wmic.exe
Token: SeRestorePrivilege	3868	wmic.exe
Token: SeShutdownPrivilege	3868	wmic.exe
Token: SeDebugPrivilege	3868	wmic.exe
Token: SeSystemEnvironmentPrivilege	3868	wmic.exe
Token: SeRemoteShutdownPrivilege	3868	wmic.exe
Token: SeUndockPrivilege	3868	wmic.exe
Token: SeManageVolumePrivilege	3868	wmic.exe
Token: 33	3868	wmic.exe
Token: 34	3868	wmic.exe
Token: 35	3868	wmic.exe
Token: 36	3868	wmic.exe
Token: SeDebugPrivilege	316	powershell.exe
Token: SeDebugPrivilege	3856	powershell.exe
Token: SeDebugPrivilege	3844	powershell.exe
Token: SeDebugPrivilege	1692	powershell.exe
Token: SeIncreaseQuotaPrivilege	2360	wmic.exe
Token: SeSecurityPrivilege	2360	wmic.exe
Token: SeTakeOwnershipPrivilege	2360	wmic.exe
Token: SeLoadDriverPrivilege	2360	wmic.exe
Token: SeSystemProfilePrivilege	2360	wmic.exe
Token: SeSystemtimePrivilege	2360	wmic.exe
Token: SeProfSingleProcessPrivilege	2360	wmic.exe
Token: SeIncBasePriorityPrivilege	2360	wmic.exe
Token: SeCreatePagefilePrivilege	2360	wmic.exe
Token: SeBackupPrivilege	2360	wmic.exe
Token: SeRestorePrivilege	2360	wmic.exe
Token: SeShutdownPrivilege	2360	wmic.exe
Token: SeDebugPrivilege	2360	wmic.exe
Token: SeSystemEnvironmentPrivilege	2360	wmic.exe
Token: SeRemoteShutdownPrivilege	2360	wmic.exe
Token: SeUndockPrivilege	2360	wmic.exe
Token: SeManageVolumePrivilege	2360	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 220 wrote to memory of 3868	220	Umbral (2).exe	93
PID 220 wrote to memory of 3868	220	Umbral (2).exe	93
PID 220 wrote to memory of 2212	220	Umbral (2).exe	98
PID 220 wrote to memory of 2212	220	Umbral (2).exe	98
PID 220 wrote to memory of 316	220	Umbral (2).exe	100
PID 220 wrote to memory of 316	220	Umbral (2).exe	100
PID 220 wrote to memory of 3856	220	Umbral (2).exe	102
PID 220 wrote to memory of 3856	220	Umbral (2).exe	102
PID 220 wrote to memory of 3844	220	Umbral (2).exe	105
PID 220 wrote to memory of 3844	220	Umbral (2).exe	105
PID 220 wrote to memory of 1692	220	Umbral (2).exe	109
PID 220 wrote to memory of 1692	220	Umbral (2).exe	109
PID 220 wrote to memory of 2360	220	Umbral (2).exe	111
PID 220 wrote to memory of 2360	220	Umbral (2).exe	111
PID 220 wrote to memory of 428	220	Umbral (2).exe	114
PID 220 wrote to memory of 428	220	Umbral (2).exe	114
PID 220 wrote to memory of 3804	220	Umbral (2).exe	116
PID 220 wrote to memory of 3804	220	Umbral (2).exe	116
PID 220 wrote to memory of 3208	220	Umbral (2).exe	118
PID 220 wrote to memory of 3208	220	Umbral (2).exe	118
PID 220 wrote to memory of 1680	220	Umbral (2).exe	120
PID 220 wrote to memory of 1680	220	Umbral (2).exe	120
PID 220 wrote to memory of 4508	220	Umbral (2).exe	123
PID 220 wrote to memory of 4508	220	Umbral (2).exe	123
PID 4508 wrote to memory of 4800	4508	cmd.exe	125
PID 4508 wrote to memory of 4800	4508	cmd.exe	125

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2212	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Umbral (2).exe
"C:\Users\Admin\AppData\Local\Temp\Umbral (2).exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:220
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3868
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral (2).exe"
  2⤵
  - Views/modifies file attributes
  PID:2212
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Umbral (2).exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:316
- 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:3856
- 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:3844
- 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:1692
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2360
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:428
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3804
- 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:3208
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1680
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Umbral (2).exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4508
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:4800

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4052,i,1828333185976713750,7918646547767660928,262144 --variations-seed-version --mojo-platform-channel-handle=4288 /prefetch:8
1⤵
PID:5096

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

Remote System Discovery

T1018

System Information Discovery

T1082

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

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
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
948B

MD5
f4bf3ca8753d6bb9725419fec1ec74b9

SHA1
71fce9d17d1d92873236a9a827c52eb9e4827f3d

SHA256
ca8697e4ada4c3d4aac2899b8aad4052ccd605fccee05ee0a831368bde2f7417

SHA512
a55a107ae8bcf833ea674413c765cd55096146c9634dff41884fcc851c12fe47753308099525c99ae44883facfb668c8b292dd915263f34ebd1190391cb28a54

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

Filesize
1KB

MD5
fff254cb5c3afd42123a4696fea48838

SHA1
2522f8d37166c8202ed692a4f7e44464cb35fe11

SHA256
e27dc87caf719841f1cddfcbd53d9a49278f9da06b13b607799a07141a7adfec

SHA512
4cd8f4dd861947242ba2ff4eb4ac3b07f7afbf5c7b73ead1f3e3052c9976b6f0d5515f661f4dc4b487ecc99ff99a048767e38f925531ec2718fbf300c5d5f7d2

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

Filesize
1KB

MD5
1a57750954cf0965156b1182704cd75e

SHA1
7f1257eea254cbf00bf4c894f5ce23902e7f05c2

SHA256
bbdf2ea578aa87c6f05be98cb782f7164522a0c433e2fac2d694c41dbb06f648

SHA512
2130b796b16d8964262ae7301ad62d8ca4292a11f9000b4989c47dfb71ed7a8eae0064eed668ca11fc791b316684a5fbe895cde788302902e6cf9f1d4eefd844

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1qfsvch4.mgr.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/220-68-0x000001BFD0430000-0x000001BFD043A000-memory.dmp

Filesize
40KB

Download
memory/220-35-0x000001BFD0410000-0x000001BFD042E000-memory.dmp

Filesize
120KB

Download
memory/220-87-0x00007FF857460000-0x00007FF857F21000-memory.dmp

Filesize
10.8MB

Download
memory/220-69-0x000001BFD0660000-0x000001BFD0672000-memory.dmp

Filesize
72KB

Download
memory/220-2-0x00007FF857460000-0x00007FF857F21000-memory.dmp

Filesize
10.8MB

Download
memory/220-33-0x000001BFD0470000-0x000001BFD04E6000-memory.dmp

Filesize
472KB

Download
memory/220-34-0x000001BFD04F0000-0x000001BFD0540000-memory.dmp

Filesize
320KB

Download
memory/220-1-0x000001BFB5D40000-0x000001BFB5D80000-memory.dmp

Filesize
256KB

Download
memory/220-0-0x00007FF857463000-0x00007FF857465000-memory.dmp

Filesize
8KB

Download
memory/316-15-0x00007FF857460000-0x00007FF857F21000-memory.dmp

Filesize
10.8MB

Download
memory/316-9-0x0000027B6B830000-0x0000027B6B852000-memory.dmp

Filesize
136KB

Download
memory/316-3-0x00007FF857460000-0x00007FF857F21000-memory.dmp

Filesize
10.8MB

Download
memory/316-10-0x00007FF857460000-0x00007FF857F21000-memory.dmp

Filesize
10.8MB

Download
memory/316-18-0x00007FF857460000-0x00007FF857F21000-memory.dmp

Filesize
10.8MB

Download