umbral | 547d284150788e783256dc8ad90f90ab6a5a2ff29211c480b4adab5a1032eebb

Analysis

max time kernel
0s
max time network
17s
platform
windows10-1703_x64
resource
win10-20231220-en
resource tags

arch:x64arch:x86image:win10-20231220-enlocale:en-usos:windows10-1703-x64system
submitted
12-01-2024 11:25

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General

Target

resou.exe
Size

212KB
MD5

e10ccc6c29f434e57bf20e4b824864fa
SHA1

9a59699a28c8173706d2cb785cea53f45fb4443c
SHA256

547d284150788e783256dc8ad90f90ab6a5a2ff29211c480b4adab5a1032eebb
SHA512

295e3cb9d3844e3586d42910fc2c50d79e08b9e4b5487c1f8a07205b0c26a199227acec7337cebc72926630cd09e5129368851776985f27d88a624c409fe7a27
SSDEEP

3072:TlP/chtWkOIGSkvDvPnsUSCLZHlitA46fsZ44lllllj0em1Sl8eN7bbXVdtXT5jI:9cyHIG3sUSS6A4Uy8eNHhdR

Score

10^/10

umbral stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2244-0-0x000001E3B41E0000-0x000001E3B421C000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral
Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102

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
4	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
5104	wmic.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3544	powershell.exe
3544	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2244	resou.exe
Token: SeDebugPrivilege	3544	powershell.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 2244 wrote to memory of 3544	2244	resou.exe	74
PID 2244 wrote to memory of 3544	2244	resou.exe	74

C:\Users\Admin\AppData\Local\Temp\resou.exe
"C:\Users\Admin\AppData\Local\Temp\resou.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2244
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\resou.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3544
- 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⤵
  PID:1528
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  PID:4668
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  PID:3432
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:4364
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
  2⤵
  PID:4372
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3068
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:5104
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  PID:3048

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
3KB

MD5
8592ba100a78835a6b94d5949e13dfc1

SHA1
63e901200ab9a57c7dd4c078d7f75dcd3b357020

SHA256
fdd7d9def6f9f0c0f2e60dbc8a2d1999071cd7d3095e9e087bb1cda7a614ac3c

SHA512
87f98e6cb61b2a2a7d65710c4d33881d89715eb7a06e00d492259f35c3902498baabffc5886be0ec5a14312ad4c262e3fc40cd3a5cb91701af0fb229726b88c3

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

Filesize
1KB

MD5
bcd56a05b4770c800186aaa4c054908b

SHA1
44f25627f066197915be7352a93917fe15bf3d72

SHA256
cf1cc6f1c5e64c9aa0ea9a5787e20ff21c9c535bcc1c2fda4cf3d00188109f9f

SHA512
35a51e60419242bf9f4ee36032dbdd87eda40cadb8cbddf1ff0a200968314e9b00b61baeaff6073a3ec7910a02036899b6f6f6e1872d8fb4f6f8e676bd833f8a

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

Filesize
1KB

MD5
331b33608b190e110e69b7deb5ea9007

SHA1
b7d6b26547194459208165cd266b0e92e59c129d

SHA256
2db7fc602d56b9d0f5c094d4554a60d19ceac802048f1358558c943bcd8401a9

SHA512
bf99bbccac8ac093c5350b10702fa0ddb44ed58a014702283a0ca14e0a6e29c9b74bd3d3e874792793d926ddf0521ec7e362a8fe45c12c08edbaa473fdeca075

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_np4yxija.uef.ps1

Filesize
1B

MD5
c4ca4238a0b923820dcc509a6f75849b

SHA1
356a192b7913b04c54574d18c28d46e6395428ab

SHA256
6b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b

SHA512
4dff4ea340f0a823f15d3f4f01ab62eae0e5da579ccb851f8db9dfe84c58b2b37b89903a740e1ee172da793a6e79d560e5f7f9bd058a12a280433ed6fa46510a

Download Submit
memory/1528-84-0x000001FD51160000-0x000001FD51170000-memory.dmp

Filesize
64KB

Download
memory/1528-57-0x00007FFCF28A0000-0x00007FFCF328C000-memory.dmp

Filesize
9.9MB

Download
memory/1528-87-0x00007FFCF28A0000-0x00007FFCF328C000-memory.dmp

Filesize
9.9MB

Download
memory/1528-60-0x000001FD51160000-0x000001FD51170000-memory.dmp

Filesize
64KB

Download
memory/1528-62-0x000001FD51160000-0x000001FD51170000-memory.dmp

Filesize
64KB

Download
memory/2244-123-0x000001E3CE7B0000-0x000001E3CE7C0000-memory.dmp

Filesize
64KB

Download
memory/2244-88-0x000001E3CE8C0000-0x000001E3CE910000-memory.dmp

Filesize
320KB

Download
memory/2244-0-0x000001E3B41E0000-0x000001E3B421C000-memory.dmp

Filesize
240KB

Download
memory/2244-200-0x00007FFCF28A0000-0x00007FFCF328C000-memory.dmp

Filesize
9.9MB

Download
memory/2244-166-0x000001E3B4670000-0x000001E3B467A000-memory.dmp

Filesize
40KB

Download
memory/2244-2-0x000001E3CE7B0000-0x000001E3CE7C0000-memory.dmp

Filesize
64KB

Download
memory/2244-1-0x00007FFCF28A0000-0x00007FFCF328C000-memory.dmp

Filesize
9.9MB

Download
memory/2244-94-0x00007FFCF28A0000-0x00007FFCF328C000-memory.dmp

Filesize
9.9MB

Download
memory/2244-167-0x000001E3B46A0000-0x000001E3B46B2000-memory.dmp

Filesize
72KB

Download
memory/2244-89-0x000001E3CE910000-0x000001E3CE92E000-memory.dmp

Filesize
120KB

Download
memory/3432-165-0x00007FFCF28A0000-0x00007FFCF328C000-memory.dmp

Filesize
9.9MB

Download
memory/3432-136-0x0000028E05CE0000-0x0000028E05CF0000-memory.dmp

Filesize
64KB

Download
memory/3432-162-0x0000028E05CE0000-0x0000028E05CF0000-memory.dmp

Filesize
64KB

Download
memory/3432-134-0x00007FFCF28A0000-0x00007FFCF328C000-memory.dmp

Filesize
9.9MB

Download
memory/3432-161-0x0000028E05CE0000-0x0000028E05CF0000-memory.dmp

Filesize
64KB

Download
memory/3432-135-0x0000028E05CE0000-0x0000028E05CF0000-memory.dmp

Filesize
64KB

Download
memory/3544-52-0x00007FFCF28A0000-0x00007FFCF328C000-memory.dmp

Filesize
9.9MB

Download
memory/3544-26-0x0000025AF0220000-0x0000025AF0230000-memory.dmp

Filesize
64KB

Download
memory/3544-7-0x00007FFCF28A0000-0x00007FFCF328C000-memory.dmp

Filesize
9.9MB

Download
memory/3544-8-0x0000025AF0220000-0x0000025AF0230000-memory.dmp

Filesize
64KB

Download
memory/3544-9-0x0000025AF0220000-0x0000025AF0230000-memory.dmp

Filesize
64KB

Download
memory/3544-10-0x0000025AF0230000-0x0000025AF0252000-memory.dmp

Filesize
136KB

Download
memory/3544-13-0x0000025AF03E0000-0x0000025AF0456000-memory.dmp

Filesize
472KB

Download
memory/3544-49-0x0000025AF0220000-0x0000025AF0230000-memory.dmp

Filesize
64KB

Download
memory/4372-173-0x00007FFCF28A0000-0x00007FFCF328C000-memory.dmp

Filesize
9.9MB

Download
memory/4372-175-0x000002750E6E0000-0x000002750E6F0000-memory.dmp

Filesize
64KB

Download
memory/4372-174-0x000002750E6E0000-0x000002750E6F0000-memory.dmp

Filesize
64KB

Download
memory/4372-196-0x00007FFCF28A0000-0x00007FFCF328C000-memory.dmp

Filesize
9.9MB

Download
memory/4372-193-0x000002750E6E0000-0x000002750E6F0000-memory.dmp

Filesize
64KB

Download
memory/4668-97-0x000001B642100000-0x000001B642110000-memory.dmp

Filesize
64KB

Download
memory/4668-96-0x000001B642100000-0x000001B642110000-memory.dmp

Filesize
64KB

Download
memory/4668-95-0x00007FFCF28A0000-0x00007FFCF328C000-memory.dmp

Filesize
9.9MB

Download
memory/4668-124-0x000001B642100000-0x000001B642110000-memory.dmp

Filesize
64KB

Download
memory/4668-125-0x000001B642100000-0x000001B642110000-memory.dmp

Filesize
64KB

Download
memory/4668-128-0x00007FFCF28A0000-0x00007FFCF328C000-memory.dmp

Filesize
9.9MB

Download