umbral | 684b9ab5768be501ebe639d24bc4e5dc4188e0a63da9d4fb9612a2fd27324285

Analysis

max time kernel
145s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
25-01-2024 21:55

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General

Target

Umbral.exe
Size

227KB
MD5

58738db2039e147e77cb04f0a07eaf52
SHA1

e23c35f7e459bd78dcd7383855cd6107671100d1
SHA256

684b9ab5768be501ebe639d24bc4e5dc4188e0a63da9d4fb9612a2fd27324285
SHA512

779e6ab46446de1435b3b3994c7639f167533fedcc6f7a5d0d5476cb27aa5b53baba49db469125a4186b1678cc110a9502519c71477f8bf56c17a10d35706590
SSDEEP

6144:eloZMUrIkd8g+EtXHkv/iD43T0mp3cw/EeHp0AVx2b8e1mSi:IoZrL+EP83T0mp3cw/EeHp0AVQ8

Score

10^/10

umbral spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/4664-0-0x0000025A0D070000-0x0000025A0D0B0000-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	Umbral.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
26	discord.com
25	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
16	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1472	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2208	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
1604	powershell.exe
1604	powershell.exe
1376	powershell.exe
1376	powershell.exe
3564	powershell.exe
3564	powershell.exe
1448	powershell.exe
1448	powershell.exe
2956	powershell.exe
2956	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4664	Umbral.exe
Token: SeDebugPrivilege	1604	powershell.exe
Token: SeDebugPrivilege	1376	powershell.exe
Token: SeDebugPrivilege	3564	powershell.exe
Token: SeDebugPrivilege	1448	powershell.exe
Token: SeIncreaseQuotaPrivilege	768	wmic.exe
Token: SeSecurityPrivilege	768	wmic.exe
Token: SeTakeOwnershipPrivilege	768	wmic.exe
Token: SeLoadDriverPrivilege	768	wmic.exe
Token: SeSystemProfilePrivilege	768	wmic.exe
Token: SeSystemtimePrivilege	768	wmic.exe
Token: SeProfSingleProcessPrivilege	768	wmic.exe
Token: SeIncBasePriorityPrivilege	768	wmic.exe
Token: SeCreatePagefilePrivilege	768	wmic.exe
Token: SeBackupPrivilege	768	wmic.exe
Token: SeRestorePrivilege	768	wmic.exe
Token: SeShutdownPrivilege	768	wmic.exe
Token: SeDebugPrivilege	768	wmic.exe
Token: SeSystemEnvironmentPrivilege	768	wmic.exe
Token: SeRemoteShutdownPrivilege	768	wmic.exe
Token: SeUndockPrivilege	768	wmic.exe
Token: SeManageVolumePrivilege	768	wmic.exe
Token: 33	768	wmic.exe
Token: 34	768	wmic.exe
Token: 35	768	wmic.exe
Token: 36	768	wmic.exe
Token: SeIncreaseQuotaPrivilege	768	wmic.exe
Token: SeSecurityPrivilege	768	wmic.exe
Token: SeTakeOwnershipPrivilege	768	wmic.exe
Token: SeLoadDriverPrivilege	768	wmic.exe
Token: SeSystemProfilePrivilege	768	wmic.exe
Token: SeSystemtimePrivilege	768	wmic.exe
Token: SeProfSingleProcessPrivilege	768	wmic.exe
Token: SeIncBasePriorityPrivilege	768	wmic.exe
Token: SeCreatePagefilePrivilege	768	wmic.exe
Token: SeBackupPrivilege	768	wmic.exe
Token: SeRestorePrivilege	768	wmic.exe
Token: SeShutdownPrivilege	768	wmic.exe
Token: SeDebugPrivilege	768	wmic.exe
Token: SeSystemEnvironmentPrivilege	768	wmic.exe
Token: SeRemoteShutdownPrivilege	768	wmic.exe
Token: SeUndockPrivilege	768	wmic.exe
Token: SeManageVolumePrivilege	768	wmic.exe
Token: 33	768	wmic.exe
Token: 34	768	wmic.exe
Token: 35	768	wmic.exe
Token: 36	768	wmic.exe
Token: SeIncreaseQuotaPrivilege	2004	wmic.exe
Token: SeSecurityPrivilege	2004	wmic.exe
Token: SeTakeOwnershipPrivilege	2004	wmic.exe
Token: SeLoadDriverPrivilege	2004	wmic.exe
Token: SeSystemProfilePrivilege	2004	wmic.exe
Token: SeSystemtimePrivilege	2004	wmic.exe
Token: SeProfSingleProcessPrivilege	2004	wmic.exe
Token: SeIncBasePriorityPrivilege	2004	wmic.exe
Token: SeCreatePagefilePrivilege	2004	wmic.exe
Token: SeBackupPrivilege	2004	wmic.exe
Token: SeRestorePrivilege	2004	wmic.exe
Token: SeShutdownPrivilege	2004	wmic.exe
Token: SeDebugPrivilege	2004	wmic.exe
Token: SeSystemEnvironmentPrivilege	2004	wmic.exe
Token: SeRemoteShutdownPrivilege	2004	wmic.exe
Token: SeUndockPrivilege	2004	wmic.exe
Token: SeManageVolumePrivilege	2004	wmic.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 4664 wrote to memory of 4436	4664	Umbral.exe	91
PID 4664 wrote to memory of 4436	4664	Umbral.exe	91
PID 4664 wrote to memory of 1604	4664	Umbral.exe	89
PID 4664 wrote to memory of 1604	4664	Umbral.exe	89
PID 4664 wrote to memory of 1376	4664	Umbral.exe	94
PID 4664 wrote to memory of 1376	4664	Umbral.exe	94
PID 4664 wrote to memory of 3564	4664	Umbral.exe	96
PID 4664 wrote to memory of 3564	4664	Umbral.exe	96
PID 4664 wrote to memory of 1448	4664	Umbral.exe	98
PID 4664 wrote to memory of 1448	4664	Umbral.exe	98
PID 4664 wrote to memory of 768	4664	Umbral.exe	102
PID 4664 wrote to memory of 768	4664	Umbral.exe	102
PID 4664 wrote to memory of 2004	4664	Umbral.exe	106
PID 4664 wrote to memory of 2004	4664	Umbral.exe	106
PID 4664 wrote to memory of 1644	4664	Umbral.exe	108
PID 4664 wrote to memory of 1644	4664	Umbral.exe	108
PID 4664 wrote to memory of 2956	4664	Umbral.exe	110
PID 4664 wrote to memory of 2956	4664	Umbral.exe	110
PID 4664 wrote to memory of 1472	4664	Umbral.exe	112
PID 4664 wrote to memory of 1472	4664	Umbral.exe	112
PID 4664 wrote to memory of 1360	4664	Umbral.exe	114
PID 4664 wrote to memory of 1360	4664	Umbral.exe	114
PID 1360 wrote to memory of 2208	1360	cmd.exe	115
PID 1360 wrote to memory of 2208	1360	cmd.exe	115

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4436	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 use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4664
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Umbral.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1604
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:4436
- 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:1376
- 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:3564
- 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:1448
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:768
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2004
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1644
- 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:2956
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1472
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Umbral.exe" && pause
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1360
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:2208

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Remote System Discovery

T1018

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
440cb38dbee06645cc8b74d51f6e5f71

SHA1
d7e61da91dc4502e9ae83281b88c1e48584edb7c

SHA256
8ef7a682dfd99ff5b7e9de0e1be43f0016d68695a43c33c028af2635cc15ecfe

SHA512
3aab19578535e6ba0f6beb5690c87d970292100704209d2dcebddcdd46c6bead27588ef5d98729bfd50606a54cc1edf608b3d15bef42c13b9982aaaf15de7fd6

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

Filesize
944B

MD5
1fabe117b9df3e717a1a47eea4ab315d

SHA1
8cf9173bbc9a86f33abd6219eaf6956da55cd080

SHA256
b35e27b7e9fbdf2096563e70e59d299b9354d34668e50cfd7cebb3a870d92c0b

SHA512
936a10b3d8685c5f3817b6d32ca262e262a104dc16b036c4a92d91ea60cf8be221a2a2121cf040a0fb470d76e779ba9ce4e82b42a075b365b1e2fdb782171a51

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
92382908106bf04aac6575ae0e55073f

SHA1
b164dd606b60ada42fe843963f95e14e92d5d86a

SHA256
1332dc373efa610424b48ae9955247275f4f94cfeecec93a5121784ed8d6b3db

SHA512
d6ee3e3776f683b2a4eaf4fd92e2cd2b9412d85fb57556130d8cabf52e180fb17b5dcdfec9ccd0b3b80bed2816c0bd2d25de35580b859e7799b7cb61071edb3f

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_nxmmytbc.0qs.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1376-34-0x00007FFB92A60000-0x00007FFB93521000-memory.dmp

Filesize
10.8MB

Download
memory/1376-31-0x000001D29F730000-0x000001D29F740000-memory.dmp

Filesize
64KB

Download
memory/1376-30-0x000001D29F730000-0x000001D29F740000-memory.dmp

Filesize
64KB

Download
memory/1376-29-0x00007FFB92A60000-0x00007FFB93521000-memory.dmp

Filesize
10.8MB

Download
memory/1448-77-0x0000018CA6030000-0x0000018CA6040000-memory.dmp

Filesize
64KB

Download
memory/1448-78-0x0000018CA6030000-0x0000018CA6040000-memory.dmp

Filesize
64KB

Download
memory/1448-76-0x00007FFB92A60000-0x00007FFB93521000-memory.dmp

Filesize
10.8MB

Download
memory/1448-80-0x00007FFB92A60000-0x00007FFB93521000-memory.dmp

Filesize
10.8MB

Download
memory/1604-18-0x00007FFB92A60000-0x00007FFB93521000-memory.dmp

Filesize
10.8MB

Download
memory/1604-12-0x00007FFB92A60000-0x00007FFB93521000-memory.dmp

Filesize
10.8MB

Download
memory/1604-13-0x000002D733B90000-0x000002D733BA0000-memory.dmp

Filesize
64KB

Download
memory/1604-14-0x000002D733AF0000-0x000002D733B12000-memory.dmp

Filesize
136KB

Download
memory/1604-15-0x000002D733B90000-0x000002D733BA0000-memory.dmp

Filesize
64KB

Download
memory/2956-97-0x00007FFB92A60000-0x00007FFB93521000-memory.dmp

Filesize
10.8MB

Download
memory/2956-102-0x00007FFB92A60000-0x00007FFB93521000-memory.dmp

Filesize
10.8MB

Download
memory/2956-98-0x000001D4EFE20000-0x000001D4EFE30000-memory.dmp

Filesize
64KB

Download
memory/2956-99-0x000001D4EFE20000-0x000001D4EFE30000-memory.dmp

Filesize
64KB

Download
memory/3564-40-0x000002244ADE0000-0x000002244ADF0000-memory.dmp

Filesize
64KB

Download
memory/3564-41-0x000002244ADE0000-0x000002244ADF0000-memory.dmp

Filesize
64KB

Download
memory/3564-39-0x00007FFB92A60000-0x00007FFB93521000-memory.dmp

Filesize
10.8MB

Download
memory/3564-65-0x00007FFB92A60000-0x00007FFB93521000-memory.dmp

Filesize
10.8MB

Download
memory/4664-0-0x0000025A0D070000-0x0000025A0D0B0000-memory.dmp

Filesize
256KB

Download
memory/4664-83-0x0000025A27860000-0x0000025A27872000-memory.dmp

Filesize
72KB

Download
memory/4664-82-0x0000025A27830000-0x0000025A2783A000-memory.dmp

Filesize
40KB

Download
memory/4664-1-0x00007FFB92A60000-0x00007FFB93521000-memory.dmp

Filesize
10.8MB

Download
memory/4664-91-0x00007FFB92A60000-0x00007FFB93521000-memory.dmp

Filesize
10.8MB

Download
memory/4664-2-0x0000025A0D460000-0x0000025A0D470000-memory.dmp

Filesize
64KB

Download
memory/4664-100-0x0000025A0D460000-0x0000025A0D470000-memory.dmp

Filesize
64KB

Download
memory/4664-36-0x0000025A277A0000-0x0000025A27816000-memory.dmp

Filesize
472KB

Download
memory/4664-38-0x0000025A27720000-0x0000025A2773E000-memory.dmp

Filesize
120KB

Download
memory/4664-37-0x0000025A27750000-0x0000025A277A0000-memory.dmp

Filesize
320KB

Download
memory/4664-107-0x00007FFB92A60000-0x00007FFB93521000-memory.dmp

Filesize
10.8MB

Download