umbral | 3abc7ea28aaa722243f21aa1f31ea191961e91babe16432c69fbb413d8b9e924

General

Target

ExodusMiner.exe
Size

229KB
MD5

610f270e3e1354a9e9cf73268e6d3835
SHA1

a5cbce545de815e3ff3ed7e2a74deb7dc059d85e
SHA256

3abc7ea28aaa722243f21aa1f31ea191961e91babe16432c69fbb413d8b9e924
SHA512

0ec59177be33aa54033b6f3081200500aa63e11c7df6990db9360f3d044ecd3ffb3d51370967c1e16fac03284e092cfd9bc41e04c9e76f953f786a1a54e9c55a
SSDEEP

6144:dloZMPrIkd8g+EtXHkv/iD4jrwQjpaC9lop7mGzOfdb8e1mtdi:/oZIL+EP8jrwQjpaC9lop7mGzO1M0

Score

10^/10

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/3636-0-0x00000204D0530000-0x00000204D0570000-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	ExodusMiner.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
17	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
804	wmic.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4668	powershell.exe
4668	powershell.exe
4944	powershell.exe
4944	powershell.exe
3652	powershell.exe
3652	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	3636	ExodusMiner.exe
Token: SeDebugPrivilege	4668	powershell.exe
Token: SeDebugPrivilege	4944	powershell.exe
Token: SeDebugPrivilege	3652	powershell.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3636 wrote to memory of 4668	3636	ExodusMiner.exe	85
PID 3636 wrote to memory of 4668	3636	ExodusMiner.exe	85
PID 3636 wrote to memory of 4944	3636	ExodusMiner.exe	88
PID 3636 wrote to memory of 4944	3636	ExodusMiner.exe	88
PID 3636 wrote to memory of 3652	3636	ExodusMiner.exe	90
PID 3636 wrote to memory of 3652	3636	ExodusMiner.exe	90
PID 3636 wrote to memory of 3984	3636	ExodusMiner.exe	92
PID 3636 wrote to memory of 3984	3636	ExodusMiner.exe	92

C:\Users\Admin\AppData\Local\Temp\ExodusMiner.exe
"C:\Users\Admin\AppData\Local\Temp\ExodusMiner.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3636
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\ExodusMiner.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4668
- 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:4944
- 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:3652
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  PID:3984
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  PID:1908
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:3188
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4512
- 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:3648
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:804

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Web Service

1

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
43475d20ed96d7c6627d7f7f5726a901

SHA1
2e1704dc14bcfe8bc0311e26cb48c3fb884407c4

SHA256
299720508b495a169d1cd56c6ab6d75a829c6b2edfd4a7816b4f581c0c8eae9a

SHA512
d9a05e8e473fc9bfb56b882d09772c99518675a7c99769f95df2466ae11ed3b62d01cb70e07db9bc51961c14fdc778efad3393213c0f08dff7bed9ea5b44623f

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
420a8e3a38ab0bfed8504b9f0115e22c

SHA1
13d80694d2fa21778bc6447897f4a8887c05cdab

SHA256
402f4154ba4f551dc82e15516d6063272f1fedb8f314ce7f3153f94e62a0e382

SHA512
4cc2fdf111b86f0b917c7c3217f5e8c213d01bbc6c5ab2570cb1a19b57a36c3fc876e56f7a95baf426aa7ca3bc1ff12bdb8375582934c113ce3b2f82846c05e2

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

Filesize
1KB

MD5
548dd08570d121a65e82abb7171cae1c

SHA1
1a1b5084b3a78f3acd0d811cc79dbcac121217ab

SHA256
cdf17b8532ebcebac3cfe23954a30aa32edd268d040da79c82687e4ccb044adc

SHA512
37b98b09178b51eec9599af90d027d2f1028202efc1633047e16e41f1a95610984af5620baac07db085ccfcb96942aafffad17aa1f44f63233e83869dc9f697b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1p04ohbj.xl3.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3636-81-0x00007FFD58FC0000-0x00007FFD59A81000-memory.dmp

Filesize
10.8MB

Download
memory/3636-86-0x00000204D2500000-0x00000204D2512000-memory.dmp

Filesize
72KB

Download
memory/3636-108-0x00007FFD58FC0000-0x00007FFD59A81000-memory.dmp

Filesize
10.8MB

Download
memory/3636-0-0x00000204D0530000-0x00000204D0570000-memory.dmp

Filesize
256KB

Download
memory/3636-1-0x00007FFD58FC0000-0x00007FFD59A81000-memory.dmp

Filesize
10.8MB

Download
memory/3636-2-0x00000204D2300000-0x00000204D2310000-memory.dmp

Filesize
64KB

Download
memory/3636-83-0x00000204D2300000-0x00000204D2310000-memory.dmp

Filesize
64KB

Download
memory/3636-89-0x00000204D2300000-0x00000204D2310000-memory.dmp

Filesize
64KB

Download
memory/3636-85-0x00000204D2380000-0x00000204D238A000-memory.dmp

Filesize
40KB

Download
memory/3636-37-0x00000204EAD20000-0x00000204EAD96000-memory.dmp

Filesize
472KB

Download
memory/3636-38-0x00000204D2310000-0x00000204D2360000-memory.dmp

Filesize
320KB

Download
memory/3636-39-0x00000204EADA0000-0x00000204EADBE000-memory.dmp

Filesize
120KB

Download
memory/3648-100-0x00000218630E0000-0x00000218630F0000-memory.dmp

Filesize
64KB

Download
memory/3648-99-0x00007FFD58FC0000-0x00007FFD59A81000-memory.dmp

Filesize
10.8MB

Download
memory/3648-103-0x00007FFD58FC0000-0x00007FFD59A81000-memory.dmp

Filesize
10.8MB

Download
memory/3652-41-0x000001C962370000-0x000001C962380000-memory.dmp

Filesize
64KB

Download
memory/3652-40-0x00007FFD58FC0000-0x00007FFD59A81000-memory.dmp

Filesize
10.8MB

Download
memory/3652-42-0x000001C962370000-0x000001C962380000-memory.dmp

Filesize
64KB

Download
memory/3652-65-0x000001C962370000-0x000001C962380000-memory.dmp

Filesize
64KB

Download
memory/3652-67-0x00007FFD58FC0000-0x00007FFD59A81000-memory.dmp

Filesize
10.8MB

Download
memory/3984-79-0x000001F23FD30000-0x000001F23FD40000-memory.dmp

Filesize
64KB

Download
memory/3984-78-0x00007FFD58FC0000-0x00007FFD59A81000-memory.dmp

Filesize
10.8MB

Download
memory/3984-82-0x00007FFD58FC0000-0x00007FFD59A81000-memory.dmp

Filesize
10.8MB

Download
memory/4668-9-0x00007FFD58FC0000-0x00007FFD59A81000-memory.dmp

Filesize
10.8MB

Download
memory/4668-3-0x00000164D9FA0000-0x00000164D9FC2000-memory.dmp

Filesize
136KB

Download
memory/4668-15-0x00000164C18A0000-0x00000164C18B0000-memory.dmp

Filesize
64KB

Download
memory/4668-14-0x00000164C18A0000-0x00000164C18B0000-memory.dmp

Filesize
64KB

Download
memory/4668-18-0x00007FFD58FC0000-0x00007FFD59A81000-memory.dmp

Filesize
10.8MB

Download
memory/4944-34-0x00007FFD58FC0000-0x00007FFD59A81000-memory.dmp

Filesize
10.8MB

Download
memory/4944-31-0x000001ABA48D0000-0x000001ABA48E0000-memory.dmp

Filesize
64KB

Download
memory/4944-32-0x000001ABA48D0000-0x000001ABA48E0000-memory.dmp

Filesize
64KB

Download
memory/4944-30-0x00007FFD58FC0000-0x00007FFD59A81000-memory.dmp

Filesize
10.8MB

Download

Analysis

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