umbral | d59f40a7e459e4f03cfafe017c0f9433714f8530757a674976a5dcc2bc68618d

Analysis

max time kernel
92s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
29-11-2024 17:48

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General

Target

Umbral.exe
Size

230KB
MD5

d36aaa797c0db93779d1e7d23deb0ea1
SHA1

8c43cdc2bbd58bde7e445a9b26a745d091c93c5c
SHA256

d59f40a7e459e4f03cfafe017c0f9433714f8530757a674976a5dcc2bc68618d
SHA512

cf192d81fb909a91b989e50b7c0bb1092f130b3394b4205ce46afa9f2070f17a6461366dbad7bbc721d8449facaf2864203d274afcd95b65d3420070c0adb9e7
SSDEEP

6144:lloZM+rIkd8g+EtXHkv/iD4OGsLCg/7IiR0STTKEJ/b8e1mVni:noZtL+EP8OGsLCg/7IiR0STTKE1r

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/3116-1-0x00000161D4000000-0x00000161D4040000-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

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
3180	powershell.exe
1408	powershell.exe
3616	powershell.exe
1456	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	Umbral.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
5	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
1444	PING.EXE
4112	cmd.exe

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1196	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1444	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
3116	Umbral.exe
1456	powershell.exe
1456	powershell.exe
3180	powershell.exe
3180	powershell.exe
1408	powershell.exe
1408	powershell.exe
4512	powershell.exe
4512	powershell.exe
3616	powershell.exe
3616	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3116	Umbral.exe
Token: SeIncreaseQuotaPrivilege	400	wmic.exe
Token: SeSecurityPrivilege	400	wmic.exe
Token: SeTakeOwnershipPrivilege	400	wmic.exe
Token: SeLoadDriverPrivilege	400	wmic.exe
Token: SeSystemProfilePrivilege	400	wmic.exe
Token: SeSystemtimePrivilege	400	wmic.exe
Token: SeProfSingleProcessPrivilege	400	wmic.exe
Token: SeIncBasePriorityPrivilege	400	wmic.exe
Token: SeCreatePagefilePrivilege	400	wmic.exe
Token: SeBackupPrivilege	400	wmic.exe
Token: SeRestorePrivilege	400	wmic.exe
Token: SeShutdownPrivilege	400	wmic.exe
Token: SeDebugPrivilege	400	wmic.exe
Token: SeSystemEnvironmentPrivilege	400	wmic.exe
Token: SeRemoteShutdownPrivilege	400	wmic.exe
Token: SeUndockPrivilege	400	wmic.exe
Token: SeManageVolumePrivilege	400	wmic.exe
Token: 33	400	wmic.exe
Token: 34	400	wmic.exe
Token: 35	400	wmic.exe
Token: 36	400	wmic.exe
Token: SeIncreaseQuotaPrivilege	400	wmic.exe
Token: SeSecurityPrivilege	400	wmic.exe
Token: SeTakeOwnershipPrivilege	400	wmic.exe
Token: SeLoadDriverPrivilege	400	wmic.exe
Token: SeSystemProfilePrivilege	400	wmic.exe
Token: SeSystemtimePrivilege	400	wmic.exe
Token: SeProfSingleProcessPrivilege	400	wmic.exe
Token: SeIncBasePriorityPrivilege	400	wmic.exe
Token: SeCreatePagefilePrivilege	400	wmic.exe
Token: SeBackupPrivilege	400	wmic.exe
Token: SeRestorePrivilege	400	wmic.exe
Token: SeShutdownPrivilege	400	wmic.exe
Token: SeDebugPrivilege	400	wmic.exe
Token: SeSystemEnvironmentPrivilege	400	wmic.exe
Token: SeRemoteShutdownPrivilege	400	wmic.exe
Token: SeUndockPrivilege	400	wmic.exe
Token: SeManageVolumePrivilege	400	wmic.exe
Token: 33	400	wmic.exe
Token: 34	400	wmic.exe
Token: 35	400	wmic.exe
Token: 36	400	wmic.exe
Token: SeDebugPrivilege	1456	powershell.exe
Token: SeDebugPrivilege	3180	powershell.exe
Token: SeDebugPrivilege	1408	powershell.exe
Token: SeDebugPrivilege	4512	powershell.exe
Token: SeIncreaseQuotaPrivilege	4492	wmic.exe
Token: SeSecurityPrivilege	4492	wmic.exe
Token: SeTakeOwnershipPrivilege	4492	wmic.exe
Token: SeLoadDriverPrivilege	4492	wmic.exe
Token: SeSystemProfilePrivilege	4492	wmic.exe
Token: SeSystemtimePrivilege	4492	wmic.exe
Token: SeProfSingleProcessPrivilege	4492	wmic.exe
Token: SeIncBasePriorityPrivilege	4492	wmic.exe
Token: SeCreatePagefilePrivilege	4492	wmic.exe
Token: SeBackupPrivilege	4492	wmic.exe
Token: SeRestorePrivilege	4492	wmic.exe
Token: SeShutdownPrivilege	4492	wmic.exe
Token: SeDebugPrivilege	4492	wmic.exe
Token: SeSystemEnvironmentPrivilege	4492	wmic.exe
Token: SeRemoteShutdownPrivilege	4492	wmic.exe
Token: SeUndockPrivilege	4492	wmic.exe
Token: SeManageVolumePrivilege	4492	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3116 wrote to memory of 400	3116	Umbral.exe	83
PID 3116 wrote to memory of 400	3116	Umbral.exe	83
PID 3116 wrote to memory of 1812	3116	Umbral.exe	86
PID 3116 wrote to memory of 1812	3116	Umbral.exe	86
PID 3116 wrote to memory of 1456	3116	Umbral.exe	88
PID 3116 wrote to memory of 1456	3116	Umbral.exe	88
PID 3116 wrote to memory of 3180	3116	Umbral.exe	90
PID 3116 wrote to memory of 3180	3116	Umbral.exe	90
PID 3116 wrote to memory of 1408	3116	Umbral.exe	92
PID 3116 wrote to memory of 1408	3116	Umbral.exe	92
PID 3116 wrote to memory of 4512	3116	Umbral.exe	94
PID 3116 wrote to memory of 4512	3116	Umbral.exe	94
PID 3116 wrote to memory of 4492	3116	Umbral.exe	96
PID 3116 wrote to memory of 4492	3116	Umbral.exe	96
PID 3116 wrote to memory of 1488	3116	Umbral.exe	98
PID 3116 wrote to memory of 1488	3116	Umbral.exe	98
PID 3116 wrote to memory of 1600	3116	Umbral.exe	101
PID 3116 wrote to memory of 1600	3116	Umbral.exe	101
PID 3116 wrote to memory of 3616	3116	Umbral.exe	103
PID 3116 wrote to memory of 3616	3116	Umbral.exe	103
PID 3116 wrote to memory of 1196	3116	Umbral.exe	105
PID 3116 wrote to memory of 1196	3116	Umbral.exe	105
PID 3116 wrote to memory of 4112	3116	Umbral.exe	107
PID 3116 wrote to memory of 4112	3116	Umbral.exe	107
PID 4112 wrote to memory of 1444	4112	cmd.exe	109
PID 4112 wrote to memory of 1444	4112	cmd.exe	109

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
1812	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Umbral.exe
"C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3116
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:400
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:1812
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Umbral.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1456
- 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:1408
- 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:4512
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4492
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1488
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1600
- 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:3616
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1196
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Umbral.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4112
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1444

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

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Downloads

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

Filesize
2KB

MD5
a7e7cfd43d30bcc61251a5a230d79a7c

SHA1
0d5c054cc7a8a11b102ba68635e306799897ce28

SHA256
063bb7675f043bb4c1d78d5dc04801560331b0e430e7579d3a535740c539590f

SHA512
1fd8d7924a249fb3200dad3d5d9eda04b33f01bbb25579e71d541d6be97b0467338a28b0a8948223e357d6bf6b851f9fd9a2c38026002307ccf7a973f7ecbe83

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

Filesize
944B

MD5
4b451bfff41491fbb65db7899b220e6e

SHA1
a80f200d4fa07d163f77edaf76ca88a13ae8b92e

SHA256
2460aaf397f756acea0d527e928a2633b6e947ce02a363cbb2288ec7dafd7e6b

SHA512
4e01c3bb07259f5e93ad6a98f97aaf20b32bc00d306bec76b235a0dbabc66cb29aebe568265dd3b44c9ad0fe31d2230029e88700498bb819b9ae22f2acd4b2f0

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

Filesize
948B

MD5
c9b6705519e1eef08f86c4ba5f4286f3

SHA1
6c6b179e452ecee2673a1d4fe128f1c06f70577f

SHA256
0f9cad44a79126871580e19b01dc3f880c5173b1faaf8b9018d5d1f829714705

SHA512
6d8f85a7a8b0b124530f36a157cd0441b5c1eacdc35e274af9fbf0569d03d1d5e468651a5b2425f0215c282ecfa7b1ffeaeeaf18612822f00bd14306d30640c7

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
45ad40f012b09e141955482368549640

SHA1
3f9cd15875c1e397c3b2b5592805577ae88a96cb

SHA256
ea3b59172f1a33677f9cb3843fb4d6093b806d3a7cf2f3c6d4692f5421f656ce

SHA512
3de08f8affca1c1450088f560776cf3d65146cadac43c06eb922c7b3cea436e519966cf38458303ffeb1a58c53f8952cffda6c34216fda7594e014b516e83b33

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_yoxc4q0z.vwm.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1456-13-0x0000027CE5B10000-0x0000027CE5B32000-memory.dmp

Filesize
136KB

Download
memory/1456-14-0x00007FF8E8380000-0x00007FF8E8E41000-memory.dmp

Filesize
10.8MB

Download
memory/1456-15-0x00007FF8E8380000-0x00007FF8E8E41000-memory.dmp

Filesize
10.8MB

Download
memory/1456-18-0x0000027CE56E0000-0x0000027CE58FC000-memory.dmp

Filesize
2.1MB

Download
memory/1456-19-0x00007FF8E8380000-0x00007FF8E8E41000-memory.dmp

Filesize
10.8MB

Download
memory/1456-12-0x00007FF8E8380000-0x00007FF8E8E41000-memory.dmp

Filesize
10.8MB

Download
memory/3116-1-0x00000161D4000000-0x00000161D4040000-memory.dmp

Filesize
256KB

Download
memory/3116-35-0x00000161EE600000-0x00000161EE650000-memory.dmp

Filesize
320KB

Download
memory/3116-36-0x00000161EE7A0000-0x00000161EE7BE000-memory.dmp

Filesize
120KB

Download
memory/3116-0-0x00007FF8E8383000-0x00007FF8E8385000-memory.dmp

Filesize
8KB

Download
memory/3116-34-0x00000161EE7F0000-0x00000161EE866000-memory.dmp

Filesize
472KB

Download
memory/3116-73-0x00000161D4510000-0x00000161D451A000-memory.dmp

Filesize
40KB

Download
memory/3116-74-0x00000161EE7C0000-0x00000161EE7D2000-memory.dmp

Filesize
72KB

Download
memory/3116-2-0x00007FF8E8380000-0x00007FF8E8E41000-memory.dmp

Filesize
10.8MB

Download
memory/3116-94-0x00007FF8E8380000-0x00007FF8E8E41000-memory.dmp

Filesize
10.8MB

Download