umbral | d263275c72e75ae20efea5fd0f635335d7591ed2094c391f8b0747316a4182f4

Analysis

max time kernel
94s
max time network
94s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
11-07-2024 22:05

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General

Target

Umbral.exe
Size

229KB
MD5

6e1ac269ea812669f7007ab3b279ff46
SHA1

03ca8457e3ed82c50db62dddbe85e45118015704
SHA256

d263275c72e75ae20efea5fd0f635335d7591ed2094c391f8b0747316a4182f4
SHA512

925cc2227ad7840796371d387fe9252f3cdfc546aae45afbba07247440031c5154b687ea5c187705d279f47bece0b3aa41c6dffd5cdf52bbe90aacb9f13ac1a9
SSDEEP

6144:9loZM+rIkd8g+EtXHkv/iD45xsWGsyVtGhTOMdRYTQb8e1mwi:foZtL+EP8TsWGsyVtGhTOMdRYs6

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/5100-0-0x0000017E53140000-0x0000017E53180000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

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

execution

PowerShell

T1059.001

pid	Process
4060	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 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
22	discord.com
23	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
3	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
764	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3116	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
5100	Umbral.exe
4060	powershell.exe
4060	powershell.exe
312	powershell.exe
312	powershell.exe
3088	powershell.exe
3088	powershell.exe
4732	powershell.exe
4732	powershell.exe
3084	powershell.exe
3084	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	5100	Umbral.exe
Token: SeIncreaseQuotaPrivilege	3048	wmic.exe
Token: SeSecurityPrivilege	3048	wmic.exe
Token: SeTakeOwnershipPrivilege	3048	wmic.exe
Token: SeLoadDriverPrivilege	3048	wmic.exe
Token: SeSystemProfilePrivilege	3048	wmic.exe
Token: SeSystemtimePrivilege	3048	wmic.exe
Token: SeProfSingleProcessPrivilege	3048	wmic.exe
Token: SeIncBasePriorityPrivilege	3048	wmic.exe
Token: SeCreatePagefilePrivilege	3048	wmic.exe
Token: SeBackupPrivilege	3048	wmic.exe
Token: SeRestorePrivilege	3048	wmic.exe
Token: SeShutdownPrivilege	3048	wmic.exe
Token: SeDebugPrivilege	3048	wmic.exe
Token: SeSystemEnvironmentPrivilege	3048	wmic.exe
Token: SeRemoteShutdownPrivilege	3048	wmic.exe
Token: SeUndockPrivilege	3048	wmic.exe
Token: SeManageVolumePrivilege	3048	wmic.exe
Token: 33	3048	wmic.exe
Token: 34	3048	wmic.exe
Token: 35	3048	wmic.exe
Token: 36	3048	wmic.exe
Token: SeIncreaseQuotaPrivilege	3048	wmic.exe
Token: SeSecurityPrivilege	3048	wmic.exe
Token: SeTakeOwnershipPrivilege	3048	wmic.exe
Token: SeLoadDriverPrivilege	3048	wmic.exe
Token: SeSystemProfilePrivilege	3048	wmic.exe
Token: SeSystemtimePrivilege	3048	wmic.exe
Token: SeProfSingleProcessPrivilege	3048	wmic.exe
Token: SeIncBasePriorityPrivilege	3048	wmic.exe
Token: SeCreatePagefilePrivilege	3048	wmic.exe
Token: SeBackupPrivilege	3048	wmic.exe
Token: SeRestorePrivilege	3048	wmic.exe
Token: SeShutdownPrivilege	3048	wmic.exe
Token: SeDebugPrivilege	3048	wmic.exe
Token: SeSystemEnvironmentPrivilege	3048	wmic.exe
Token: SeRemoteShutdownPrivilege	3048	wmic.exe
Token: SeUndockPrivilege	3048	wmic.exe
Token: SeManageVolumePrivilege	3048	wmic.exe
Token: 33	3048	wmic.exe
Token: 34	3048	wmic.exe
Token: 35	3048	wmic.exe
Token: 36	3048	wmic.exe
Token: SeDebugPrivilege	4060	powershell.exe
Token: SeDebugPrivilege	312	powershell.exe
Token: SeDebugPrivilege	3088	powershell.exe
Token: SeDebugPrivilege	4732	powershell.exe
Token: SeIncreaseQuotaPrivilege	884	wmic.exe
Token: SeSecurityPrivilege	884	wmic.exe
Token: SeTakeOwnershipPrivilege	884	wmic.exe
Token: SeLoadDriverPrivilege	884	wmic.exe
Token: SeSystemProfilePrivilege	884	wmic.exe
Token: SeSystemtimePrivilege	884	wmic.exe
Token: SeProfSingleProcessPrivilege	884	wmic.exe
Token: SeIncBasePriorityPrivilege	884	wmic.exe
Token: SeCreatePagefilePrivilege	884	wmic.exe
Token: SeBackupPrivilege	884	wmic.exe
Token: SeRestorePrivilege	884	wmic.exe
Token: SeShutdownPrivilege	884	wmic.exe
Token: SeDebugPrivilege	884	wmic.exe
Token: SeSystemEnvironmentPrivilege	884	wmic.exe
Token: SeRemoteShutdownPrivilege	884	wmic.exe
Token: SeUndockPrivilege	884	wmic.exe
Token: SeManageVolumePrivilege	884	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 5100 wrote to memory of 3048	5100	Umbral.exe	85
PID 5100 wrote to memory of 3048	5100	Umbral.exe	85
PID 5100 wrote to memory of 4536	5100	Umbral.exe	90
PID 5100 wrote to memory of 4536	5100	Umbral.exe	90
PID 5100 wrote to memory of 4060	5100	Umbral.exe	92
PID 5100 wrote to memory of 4060	5100	Umbral.exe	92
PID 5100 wrote to memory of 312	5100	Umbral.exe	94
PID 5100 wrote to memory of 312	5100	Umbral.exe	94
PID 5100 wrote to memory of 3088	5100	Umbral.exe	96
PID 5100 wrote to memory of 3088	5100	Umbral.exe	96
PID 5100 wrote to memory of 4732	5100	Umbral.exe	98
PID 5100 wrote to memory of 4732	5100	Umbral.exe	98
PID 5100 wrote to memory of 884	5100	Umbral.exe	100
PID 5100 wrote to memory of 884	5100	Umbral.exe	100
PID 5100 wrote to memory of 2252	5100	Umbral.exe	102
PID 5100 wrote to memory of 2252	5100	Umbral.exe	102
PID 5100 wrote to memory of 4928	5100	Umbral.exe	104
PID 5100 wrote to memory of 4928	5100	Umbral.exe	104
PID 5100 wrote to memory of 3084	5100	Umbral.exe	106
PID 5100 wrote to memory of 3084	5100	Umbral.exe	106
PID 5100 wrote to memory of 764	5100	Umbral.exe	108
PID 5100 wrote to memory of 764	5100	Umbral.exe	108
PID 5100 wrote to memory of 2244	5100	Umbral.exe	110
PID 5100 wrote to memory of 2244	5100	Umbral.exe	110
PID 2244 wrote to memory of 3116	2244	cmd.exe	112
PID 2244 wrote to memory of 3116	2244	cmd.exe	112

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4536	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:5100
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3048
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:4536
- 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:4060
- 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:312
- 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:3088
- 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:4732
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:884
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2252
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4928
- 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:3084
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:764
- 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:2244
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:3116

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

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
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
5824a6037c081fda5d46de274b6e2799

SHA1
526367a09300cbde430e8fb44e41cbe7a0937aac

SHA256
4d610d9cd32a20279c7133a726ff61820d6930e5aa18253ee1422f3a6f54953f

SHA512
a109b150f730cda78d5bee106bd232f9dca7500dfb7899c6919de2bd542e345ca271aa11809a24ea0a27dca158067ab3a2d5688ac0a2325185143245f1665582

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
eeb6ad386d143f278077171fc01a81e8

SHA1
43cff1bd7240965bfb2f10e47c0cec0f94332e2d

SHA256
59d62f9472b4c00b7cae0ee702789fa2b0042c468e4de9421d2430f9973eb00d

SHA512
b40f003e6d97adaaf05809f06d12df01984943d9eb6c44eaeffef90df8de0040373150c9714b11a42db5189b7064eeed0609a39f6f1feb91b05dd1835333e8f2

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_012hajw3.kll.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/4060-13-0x00000279202F0000-0x0000027920312000-memory.dmp

Filesize
136KB

Download
memory/4060-12-0x00007FFF17000000-0x00007FFF17AC1000-memory.dmp

Filesize
10.8MB

Download
memory/4060-14-0x00007FFF17000000-0x00007FFF17AC1000-memory.dmp

Filesize
10.8MB

Download
memory/4060-15-0x00007FFF17000000-0x00007FFF17AC1000-memory.dmp

Filesize
10.8MB

Download
memory/4060-18-0x00007FFF17000000-0x00007FFF17AC1000-memory.dmp

Filesize
10.8MB

Download
memory/5100-34-0x0000017E6D860000-0x0000017E6D8B0000-memory.dmp

Filesize
320KB

Download
memory/5100-33-0x0000017E6D8E0000-0x0000017E6D956000-memory.dmp

Filesize
472KB

Download
memory/5100-35-0x0000017E6D8B0000-0x0000017E6D8CE000-memory.dmp

Filesize
120KB

Download
memory/5100-0-0x0000017E53140000-0x0000017E53180000-memory.dmp

Filesize
256KB

Download
memory/5100-1-0x00007FFF17003000-0x00007FFF17005000-memory.dmp

Filesize
8KB

Download
memory/5100-71-0x0000017E54F10000-0x0000017E54F1A000-memory.dmp

Filesize
40KB

Download
memory/5100-72-0x0000017E6E710000-0x0000017E6E722000-memory.dmp

Filesize
72KB

Download
memory/5100-2-0x00007FFF17000000-0x00007FFF17AC1000-memory.dmp

Filesize
10.8MB

Download
memory/5100-90-0x00007FFF17000000-0x00007FFF17AC1000-memory.dmp

Filesize
10.8MB

Download