umbral | 13dbfe8753d896c070bc48d6b4b07f76a8e34a9d949f855fb6e810197764f4bf

Analysis

max time kernel
64s
max time network
75s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
05-04-2024 23:16

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General

Target

mw3loader.exe
Size

227KB
MD5

4c8071eac3e759a8d31d887cefd6a13e
SHA1

3931ad556f63a7afe07d01f0193154fee4587b5c
SHA256

13dbfe8753d896c070bc48d6b4b07f76a8e34a9d949f855fb6e810197764f4bf
SHA512

31b621a3dccc6d6b024c432c453da26caa0ad6f81f72d77c9bdb35c16522d3f101f7114106a735e738213adf264f0aaf00b1fe3217065f6d884acb32ddf86754
SSDEEP

6144:eloZM9rIkd8g+EtXHkv/iD44PCKSGELnsDd42X3Wh2b8e1mni:IoZOL+EP8qCKSGELnsDd42X3Wsl

Score

10^/10

umbral spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/408-0-0x00000142E13D0000-0x00000142E1410000-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	mw3loader.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
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
18	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2388	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
464	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
3340	powershell.exe
3340	powershell.exe
3740	powershell.exe
3740	powershell.exe
220	powershell.exe
220	powershell.exe
2296	powershell.exe
2296	powershell.exe
4116	powershell.exe
4116	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	408	mw3loader.exe
Token: SeDebugPrivilege	3340	powershell.exe
Token: SeDebugPrivilege	3740	powershell.exe
Token: SeDebugPrivilege	220	powershell.exe
Token: SeDebugPrivilege	2296	powershell.exe
Token: SeIncreaseQuotaPrivilege	3656	wmic.exe
Token: SeSecurityPrivilege	3656	wmic.exe
Token: SeTakeOwnershipPrivilege	3656	wmic.exe
Token: SeLoadDriverPrivilege	3656	wmic.exe
Token: SeSystemProfilePrivilege	3656	wmic.exe
Token: SeSystemtimePrivilege	3656	wmic.exe
Token: SeProfSingleProcessPrivilege	3656	wmic.exe
Token: SeIncBasePriorityPrivilege	3656	wmic.exe
Token: SeCreatePagefilePrivilege	3656	wmic.exe
Token: SeBackupPrivilege	3656	wmic.exe
Token: SeRestorePrivilege	3656	wmic.exe
Token: SeShutdownPrivilege	3656	wmic.exe
Token: SeDebugPrivilege	3656	wmic.exe
Token: SeSystemEnvironmentPrivilege	3656	wmic.exe
Token: SeRemoteShutdownPrivilege	3656	wmic.exe
Token: SeUndockPrivilege	3656	wmic.exe
Token: SeManageVolumePrivilege	3656	wmic.exe
Token: 33	3656	wmic.exe
Token: 34	3656	wmic.exe
Token: 35	3656	wmic.exe
Token: 36	3656	wmic.exe
Token: SeIncreaseQuotaPrivilege	3656	wmic.exe
Token: SeSecurityPrivilege	3656	wmic.exe
Token: SeTakeOwnershipPrivilege	3656	wmic.exe
Token: SeLoadDriverPrivilege	3656	wmic.exe
Token: SeSystemProfilePrivilege	3656	wmic.exe
Token: SeSystemtimePrivilege	3656	wmic.exe
Token: SeProfSingleProcessPrivilege	3656	wmic.exe
Token: SeIncBasePriorityPrivilege	3656	wmic.exe
Token: SeCreatePagefilePrivilege	3656	wmic.exe
Token: SeBackupPrivilege	3656	wmic.exe
Token: SeRestorePrivilege	3656	wmic.exe
Token: SeShutdownPrivilege	3656	wmic.exe
Token: SeDebugPrivilege	3656	wmic.exe
Token: SeSystemEnvironmentPrivilege	3656	wmic.exe
Token: SeRemoteShutdownPrivilege	3656	wmic.exe
Token: SeUndockPrivilege	3656	wmic.exe
Token: SeManageVolumePrivilege	3656	wmic.exe
Token: 33	3656	wmic.exe
Token: 34	3656	wmic.exe
Token: 35	3656	wmic.exe
Token: 36	3656	wmic.exe
Token: SeIncreaseQuotaPrivilege	3156	wmic.exe
Token: SeSecurityPrivilege	3156	wmic.exe
Token: SeTakeOwnershipPrivilege	3156	wmic.exe
Token: SeLoadDriverPrivilege	3156	wmic.exe
Token: SeSystemProfilePrivilege	3156	wmic.exe
Token: SeSystemtimePrivilege	3156	wmic.exe
Token: SeProfSingleProcessPrivilege	3156	wmic.exe
Token: SeIncBasePriorityPrivilege	3156	wmic.exe
Token: SeCreatePagefilePrivilege	3156	wmic.exe
Token: SeBackupPrivilege	3156	wmic.exe
Token: SeRestorePrivilege	3156	wmic.exe
Token: SeShutdownPrivilege	3156	wmic.exe
Token: SeDebugPrivilege	3156	wmic.exe
Token: SeSystemEnvironmentPrivilege	3156	wmic.exe
Token: SeRemoteShutdownPrivilege	3156	wmic.exe
Token: SeUndockPrivilege	3156	wmic.exe
Token: SeManageVolumePrivilege	3156	wmic.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 408 wrote to memory of 224	408	mw3loader.exe	86
PID 408 wrote to memory of 224	408	mw3loader.exe	86
PID 408 wrote to memory of 3340	408	mw3loader.exe	88
PID 408 wrote to memory of 3340	408	mw3loader.exe	88
PID 408 wrote to memory of 3740	408	mw3loader.exe	91
PID 408 wrote to memory of 3740	408	mw3loader.exe	91
PID 408 wrote to memory of 220	408	mw3loader.exe	93
PID 408 wrote to memory of 220	408	mw3loader.exe	93
PID 408 wrote to memory of 2296	408	mw3loader.exe	95
PID 408 wrote to memory of 2296	408	mw3loader.exe	95
PID 408 wrote to memory of 3656	408	mw3loader.exe	100
PID 408 wrote to memory of 3656	408	mw3loader.exe	100
PID 408 wrote to memory of 3156	408	mw3loader.exe	103
PID 408 wrote to memory of 3156	408	mw3loader.exe	103
PID 408 wrote to memory of 4764	408	mw3loader.exe	105
PID 408 wrote to memory of 4764	408	mw3loader.exe	105
PID 408 wrote to memory of 4116	408	mw3loader.exe	107
PID 408 wrote to memory of 4116	408	mw3loader.exe	107
PID 408 wrote to memory of 2388	408	mw3loader.exe	109
PID 408 wrote to memory of 2388	408	mw3loader.exe	109
PID 408 wrote to memory of 2660	408	mw3loader.exe	112
PID 408 wrote to memory of 2660	408	mw3loader.exe	112
PID 2660 wrote to memory of 464	2660	cmd.exe	114
PID 2660 wrote to memory of 464	2660	cmd.exe	114

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
224	attrib.exe

C:\Users\Admin\AppData\Local\Temp\mw3loader.exe
"C:\Users\Admin\AppData\Local\Temp\mw3loader.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:408
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\mw3loader.exe"
  2⤵
  - Views/modifies file attributes
  PID:224
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\mw3loader.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3340
- 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:3740
- 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:220
- 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:2296
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3656
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3156
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4764
- 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:4116
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2388
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\mw3loader.exe" && pause
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2660
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:464

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
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

Filesize
1KB

MD5
438dca7eeb55d273616d0252451e4363

SHA1
5a36cdaa9f3315b6002316dbe0793e6b72558fe7

SHA256
621e3bb74323c1c1bc1d5d7bd2fdbc792f1bd5f7e870272b58159fe494ce8aa0

SHA512
fedbe6f63e51ea0440954ae187b3f991db380dc4d60d52a879263c10fcb94c58cd94084e86d0f84da6edb1a7506819b7aa0f660c2b8fc631c68a435f50d72ff4

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

Filesize
944B

MD5
3a6bad9528f8e23fb5c77fbd81fa28e8

SHA1
f127317c3bc6407f536c0f0600dcbcf1aabfba36

SHA256
986366767de5873f1b170a63f2a33ce05132d1afd90c8f5017afbca8ef1beb05

SHA512
846002154a0ece6f3e9feda6f115d3161dc21b3789525dd62ae1d9188495171293efdbe7be4710666dd8a15e66b557315b5a02918a741ed1d5f3ff0c515b98e2

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

Filesize
948B

MD5
966914e2e771de7a4a57a95b6ecfa8a9

SHA1
7a32282fd51dd032967ed4d9a40cc57e265aeff2

SHA256
98d3c70d7004fa807897317bd6cd3e977b9b6c72d4d2565aca0f9f8b1c315cba

SHA512
dc39c7124a9c7c8d4c7e8e16290c46360b8d9a8f4e43edaacbbeb09bdcf20159a53db54d2b322372001b6a3de52b2f88e9088b5fdbc7638816ae0d122bb015f5

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

Filesize
1KB

MD5
d3235ed022a42ec4338123ab87144afa

SHA1
5058608bc0deb720a585a2304a8f7cf63a50a315

SHA256
10663f5a1cb0afe5578f61ebaae2aafb363544e47b48521f9c23be9e6e431b27

SHA512
236761b7c68feca8bd62cba90cff0b25fac5613837aaa5d29ae823ace8b06a2057553cf7e72b11ccc59b6c289e471ca1bbac1a880aef5e2868875371a17c1abf

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3sycymp0.tr2.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/220-46-0x00000286F3F10000-0x00000286F3F20000-memory.dmp

Filesize
64KB

Download
memory/220-45-0x00000286F3F10000-0x00000286F3F20000-memory.dmp

Filesize
64KB

Download
memory/220-70-0x00000286F3F10000-0x00000286F3F20000-memory.dmp

Filesize
64KB

Download
memory/220-72-0x00007FF8B94D0000-0x00007FF8B9F91000-memory.dmp

Filesize
10.8MB

Download
memory/220-44-0x00007FF8B94D0000-0x00007FF8B9F91000-memory.dmp

Filesize
10.8MB

Download
memory/408-0-0x00000142E13D0000-0x00000142E1410000-memory.dmp

Filesize
256KB

Download
memory/408-86-0x00000142E17C0000-0x00000142E17D0000-memory.dmp

Filesize
64KB

Download
memory/408-90-0x00000142E3090000-0x00000142E309A000-memory.dmp

Filesize
40KB

Download
memory/408-91-0x00000142FBBF0000-0x00000142FBC02000-memory.dmp

Filesize
72KB

Download
memory/408-69-0x00007FF8B94D0000-0x00007FF8B9F91000-memory.dmp

Filesize
10.8MB

Download
memory/408-113-0x00007FF8B94D0000-0x00007FF8B9F91000-memory.dmp

Filesize
10.8MB

Download
memory/408-2-0x00000142E17C0000-0x00000142E17D0000-memory.dmp

Filesize
64KB

Download
memory/408-1-0x00007FF8B94D0000-0x00007FF8B9F91000-memory.dmp

Filesize
10.8MB

Download
memory/408-41-0x00000142FBB70000-0x00000142FBBE6000-memory.dmp

Filesize
472KB

Download
memory/408-42-0x00000142FBAF0000-0x00000142FBB40000-memory.dmp

Filesize
320KB

Download
memory/408-43-0x00000142E3070000-0x00000142E308E000-memory.dmp

Filesize
120KB

Download
memory/2296-75-0x000002ADAFB40000-0x000002ADAFB50000-memory.dmp

Filesize
64KB

Download
memory/2296-88-0x00007FF8B94D0000-0x00007FF8B9F91000-memory.dmp

Filesize
10.8MB

Download
memory/2296-73-0x00007FF8B94D0000-0x00007FF8B9F91000-memory.dmp

Filesize
10.8MB

Download
memory/2296-74-0x000002ADAFB40000-0x000002ADAFB50000-memory.dmp

Filesize
64KB

Download
memory/3340-16-0x000001FDEF100000-0x000001FDEF110000-memory.dmp

Filesize
64KB

Download
memory/3340-3-0x00007FF8B94D0000-0x00007FF8B9F91000-memory.dmp

Filesize
10.8MB

Download
memory/3340-5-0x000001FDEF100000-0x000001FDEF110000-memory.dmp

Filesize
64KB

Download
memory/3340-4-0x000001FDEF100000-0x000001FDEF110000-memory.dmp

Filesize
64KB

Download
memory/3340-11-0x000001FDD69F0000-0x000001FDD6A12000-memory.dmp

Filesize
136KB

Download
memory/3340-20-0x00007FF8B94D0000-0x00007FF8B9F91000-memory.dmp

Filesize
10.8MB

Download
memory/3340-17-0x000001FDEF100000-0x000001FDEF110000-memory.dmp

Filesize
64KB

Download
memory/3740-22-0x00007FF8B94D0000-0x00007FF8B9F91000-memory.dmp

Filesize
10.8MB

Download
memory/3740-38-0x00007FF8B94D0000-0x00007FF8B9F91000-memory.dmp

Filesize
10.8MB

Download
memory/3740-23-0x000001A1E3F70000-0x000001A1E3F80000-memory.dmp

Filesize
64KB

Download
memory/3740-24-0x000001A1E3F70000-0x000001A1E3F80000-memory.dmp

Filesize
64KB

Download
memory/3740-35-0x000001A1E3F70000-0x000001A1E3F80000-memory.dmp

Filesize
64KB

Download
memory/3740-36-0x000001A1E3F70000-0x000001A1E3F80000-memory.dmp

Filesize
64KB

Download
memory/4116-94-0x00007FF8B94D0000-0x00007FF8B9F91000-memory.dmp

Filesize
10.8MB

Download
memory/4116-95-0x000001E818730000-0x000001E818740000-memory.dmp

Filesize
64KB

Download
memory/4116-96-0x000001E818730000-0x000001E818740000-memory.dmp

Filesize
64KB

Download
memory/4116-108-0x00007FF8B94D0000-0x00007FF8B9F91000-memory.dmp

Filesize
10.8MB

Download