umbral | 435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92

Analysis

max time kernel
93s
max time network
95s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
19-09-2024 02:17

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General

Target

435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe
Size

231KB
MD5

3b915b9bbc5ddf429f85bf939febe424
SHA1

2278baaf3764a27bc962de75601f4d49b2191592
SHA256

435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92
SHA512

d83341bf784bed732bf120299824ea066f66f505b6dd0fb0b84396af34877a1ba0c483c805835179be2463dd34503b31260035e78f47ca1396305f60f2be50ed
SSDEEP

6144:xloZM+rIkd8g+EtXHkv/iD4LmfzMOsTPkPFQu//OPub8e1mt6i:DoZtL+EP8LwzMOsTPkPFQu//OKO/

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/4364-1-0x000002151B5E0000-0x000002151B620000-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
388	powershell.exe
4468	powershell.exe
1856	powershell.exe
4068	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.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
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
3628	cmd.exe
4952	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2792	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4952	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
4364	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe
388	powershell.exe
388	powershell.exe
4468	powershell.exe
4468	powershell.exe
1856	powershell.exe
1856	powershell.exe
3680	powershell.exe
3680	powershell.exe
4068	powershell.exe
4068	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4364	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe
Token: SeIncreaseQuotaPrivilege	1672	wmic.exe
Token: SeSecurityPrivilege	1672	wmic.exe
Token: SeTakeOwnershipPrivilege	1672	wmic.exe
Token: SeLoadDriverPrivilege	1672	wmic.exe
Token: SeSystemProfilePrivilege	1672	wmic.exe
Token: SeSystemtimePrivilege	1672	wmic.exe
Token: SeProfSingleProcessPrivilege	1672	wmic.exe
Token: SeIncBasePriorityPrivilege	1672	wmic.exe
Token: SeCreatePagefilePrivilege	1672	wmic.exe
Token: SeBackupPrivilege	1672	wmic.exe
Token: SeRestorePrivilege	1672	wmic.exe
Token: SeShutdownPrivilege	1672	wmic.exe
Token: SeDebugPrivilege	1672	wmic.exe
Token: SeSystemEnvironmentPrivilege	1672	wmic.exe
Token: SeRemoteShutdownPrivilege	1672	wmic.exe
Token: SeUndockPrivilege	1672	wmic.exe
Token: SeManageVolumePrivilege	1672	wmic.exe
Token: 33	1672	wmic.exe
Token: 34	1672	wmic.exe
Token: 35	1672	wmic.exe
Token: 36	1672	wmic.exe
Token: SeIncreaseQuotaPrivilege	1672	wmic.exe
Token: SeSecurityPrivilege	1672	wmic.exe
Token: SeTakeOwnershipPrivilege	1672	wmic.exe
Token: SeLoadDriverPrivilege	1672	wmic.exe
Token: SeSystemProfilePrivilege	1672	wmic.exe
Token: SeSystemtimePrivilege	1672	wmic.exe
Token: SeProfSingleProcessPrivilege	1672	wmic.exe
Token: SeIncBasePriorityPrivilege	1672	wmic.exe
Token: SeCreatePagefilePrivilege	1672	wmic.exe
Token: SeBackupPrivilege	1672	wmic.exe
Token: SeRestorePrivilege	1672	wmic.exe
Token: SeShutdownPrivilege	1672	wmic.exe
Token: SeDebugPrivilege	1672	wmic.exe
Token: SeSystemEnvironmentPrivilege	1672	wmic.exe
Token: SeRemoteShutdownPrivilege	1672	wmic.exe
Token: SeUndockPrivilege	1672	wmic.exe
Token: SeManageVolumePrivilege	1672	wmic.exe
Token: 33	1672	wmic.exe
Token: 34	1672	wmic.exe
Token: 35	1672	wmic.exe
Token: 36	1672	wmic.exe
Token: SeDebugPrivilege	388	powershell.exe
Token: SeDebugPrivilege	4468	powershell.exe
Token: SeDebugPrivilege	1856	powershell.exe
Token: SeDebugPrivilege	3680	powershell.exe
Token: SeIncreaseQuotaPrivilege	4624	wmic.exe
Token: SeSecurityPrivilege	4624	wmic.exe
Token: SeTakeOwnershipPrivilege	4624	wmic.exe
Token: SeLoadDriverPrivilege	4624	wmic.exe
Token: SeSystemProfilePrivilege	4624	wmic.exe
Token: SeSystemtimePrivilege	4624	wmic.exe
Token: SeProfSingleProcessPrivilege	4624	wmic.exe
Token: SeIncBasePriorityPrivilege	4624	wmic.exe
Token: SeCreatePagefilePrivilege	4624	wmic.exe
Token: SeBackupPrivilege	4624	wmic.exe
Token: SeRestorePrivilege	4624	wmic.exe
Token: SeShutdownPrivilege	4624	wmic.exe
Token: SeDebugPrivilege	4624	wmic.exe
Token: SeSystemEnvironmentPrivilege	4624	wmic.exe
Token: SeRemoteShutdownPrivilege	4624	wmic.exe
Token: SeUndockPrivilege	4624	wmic.exe
Token: SeManageVolumePrivilege	4624	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4364 wrote to memory of 1672	4364	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	82
PID 4364 wrote to memory of 1672	4364	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	82
PID 4364 wrote to memory of 3104	4364	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	85
PID 4364 wrote to memory of 3104	4364	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	85
PID 4364 wrote to memory of 388	4364	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	87
PID 4364 wrote to memory of 388	4364	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	87
PID 4364 wrote to memory of 4468	4364	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	89
PID 4364 wrote to memory of 4468	4364	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	89
PID 4364 wrote to memory of 1856	4364	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	91
PID 4364 wrote to memory of 1856	4364	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	91
PID 4364 wrote to memory of 3680	4364	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	93
PID 4364 wrote to memory of 3680	4364	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	93
PID 4364 wrote to memory of 4624	4364	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	97
PID 4364 wrote to memory of 4624	4364	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	97
PID 4364 wrote to memory of 3404	4364	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	99
PID 4364 wrote to memory of 3404	4364	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	99
PID 4364 wrote to memory of 4808	4364	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	101
PID 4364 wrote to memory of 4808	4364	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	101
PID 4364 wrote to memory of 4068	4364	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	103
PID 4364 wrote to memory of 4068	4364	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	103
PID 4364 wrote to memory of 2792	4364	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	106
PID 4364 wrote to memory of 2792	4364	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	106
PID 4364 wrote to memory of 3628	4364	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	108
PID 4364 wrote to memory of 3628	4364	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	108
PID 3628 wrote to memory of 4952	3628	cmd.exe	110
PID 3628 wrote to memory of 4952	3628	cmd.exe	110

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3104	attrib.exe

C:\Users\Admin\AppData\Local\Temp\435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe
"C:\Users\Admin\AppData\Local\Temp\435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4364
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1672
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe"
  2⤵
  - Views/modifies file attributes
  PID:3104
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:388
- 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:4468
- 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:1856
- 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:3680
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4624
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:3404
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4808
- 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:4068
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2792
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:3628
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:4952

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
440cb38dbee06645cc8b74d51f6e5f71

SHA1
d7e61da91dc4502e9ae83281b88c1e48584edb7c

SHA256
8ef7a682dfd99ff5b7e9de0e1be43f0016d68695a43c33c028af2635cc15ecfe

SHA512
3aab19578535e6ba0f6beb5690c87d970292100704209d2dcebddcdd46c6bead27588ef5d98729bfd50606a54cc1edf608b3d15bef42c13b9982aaaf15de7fd6

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

Filesize
944B

MD5
4d8567f2d1c8a09bbfe613145bf78577

SHA1
f2af10d629e6d7d2ecec76c34bd755ecf61be931

SHA256
7437b098af4618fbcefe7522942c862aeaf39a0b82ce05b0797185c552f22a3c

SHA512
89130e5c514e33f5108e308f300614dc63989f3e6a4e762a12982af341ab1c5748dd93fd185698dcf6d3a1ea7234228d04ad962e4ee0a15a683e988f115a84ea

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

Filesize
948B

MD5
47aec0ae6e0dfab5f91c35cd65d2c56a

SHA1
0bbe13618bdc0c402539cdfca81471aa501f5cad

SHA256
8f31385012b247db2cc50ecb164208fbbf5f8cdf7bfc951e8c2c8ad5fb04cf0b

SHA512
c4b7184a85c1d594012ba86390e651439d6cae63c76b94432faaaea410e4ef9bc62d88e68adf8f3abbe36e18ef9e4dc46c3e31a0d72089f98a22f04c8b4a8f12

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
ca58d1913d3261f116a299095e04f734

SHA1
941d13d0c8c65adb6513f23991acfa0d62facdea

SHA256
755daf72f2f5e983abb009c3b1eef4c7c660999f5ff581545bbcae7088c17c69

SHA512
87b0d8c9a5348235e9ad6416e09665764db1af408bf763857dc40e39411fa0cf405e3e8b9f0b8540c72aa874059d1dee865aa0cff8dba0fde5779ec9480b5e40

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_5xuhb14r.sxt.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/388-13-0x00007FFF79C80000-0x00007FFF7A741000-memory.dmp

Filesize
10.8MB

Download
memory/388-14-0x00007FFF79C80000-0x00007FFF7A741000-memory.dmp

Filesize
10.8MB

Download
memory/388-15-0x000001FD51900000-0x000001FD51922000-memory.dmp

Filesize
136KB

Download
memory/388-18-0x00007FFF79C80000-0x00007FFF7A741000-memory.dmp

Filesize
10.8MB

Download
memory/388-3-0x00007FFF79C80000-0x00007FFF7A741000-memory.dmp

Filesize
10.8MB

Download
memory/4364-34-0x0000021535D90000-0x0000021535DE0000-memory.dmp

Filesize
320KB

Download
memory/4364-33-0x0000021535D10000-0x0000021535D86000-memory.dmp

Filesize
472KB

Download
memory/4364-35-0x0000021535CA0000-0x0000021535CBE000-memory.dmp

Filesize
120KB

Download
memory/4364-1-0x000002151B5E0000-0x000002151B620000-memory.dmp

Filesize
256KB

Download
memory/4364-0-0x00007FFF79C83000-0x00007FFF79C85000-memory.dmp

Filesize
8KB

Download
memory/4364-71-0x0000021535EE0000-0x0000021535EEA000-memory.dmp

Filesize
40KB

Download
memory/4364-72-0x0000021536D90000-0x0000021536DA2000-memory.dmp

Filesize
72KB

Download
memory/4364-2-0x00007FFF79C80000-0x00007FFF7A741000-memory.dmp

Filesize
10.8MB

Download
memory/4364-90-0x0000021535F30000-0x00000215360D9000-memory.dmp

Filesize
1.7MB

Download
memory/4364-91-0x00007FFF79C80000-0x00007FFF7A741000-memory.dmp

Filesize
10.8MB

Download