umbral | 6b3fb6fce70e0a6cbe4dec6627f76ff70414048360f03c7d72099fbd059591ed

Resubmissions

21-09-2024 20:11

240921-yyasqa1cnc 10

21-09-2024 11:23

240921-nhfc6azbpe 10

Analysis

max time kernel
600s
max time network
438s
platform
windows10-2004_x64
resource
win10v2004-20240910-en
resource tags

arch:x64arch:x86image:win10v2004-20240910-enlocale:en-usos:windows10-2004-x64system
submitted
21-09-2024 20:11

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General

Target

Emerald X.zip
Size

2.9MB
MD5

6d5e6bb315019834ad58da276fb2b4ee
SHA1

c3dfebcf3caf961c745a070c58a78dd5c30bd368
SHA256

6b3fb6fce70e0a6cbe4dec6627f76ff70414048360f03c7d72099fbd059591ed
SHA512

6619981ecb97ec806c3a0c57cab618f17f214a0e96c26ff7f31f26362ba7facf0667e874269d51ee38e2705c0eaed4cbb0eacf8ea92aae150271f635f2ccf213
SSDEEP

49152:Gf+JRr8UFdx5nmGAlo1S6OxurnJtB1Xgaon+3BzWVoZ0AEk:G2bdx5nmc7OcnJhXge3BzWiZ0Ab

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Extracted

Family

umbral

https://discord.com/api/webhooks/1282641542556811284/XhP2lBGmy2WSxK1y0l23RHuQqEin2SHIJODdzqGhEFoaXh5jRVDNcIXTEi8GEfBNxtlo

Signatures

Detect Umbral payload 2 IoCs

resource	yara_rule
behavioral2/files/0x0009000000023bd4-106.dat	family_umbral
behavioral2/memory/3016-108-0x000001ACD1FF0000-0x000001ACD2030000-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
2132	powershell.exe
3964	powershell.exe
624	powershell.exe
3480	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	Emerald.exe

Executes dropped EXE 2 IoCs

pid	Process
3016	Emerald.exe
2548	Injector.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
53	discord.com
52	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
43	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
1788	cmd.exe
1580	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2304	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1580	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe
2548	Injector.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeRestorePrivilege	2860	7zG.exe
Token: 35	2860	7zG.exe
Token: SeSecurityPrivilege	2860	7zG.exe
Token: SeSecurityPrivilege	2860	7zG.exe
Token: SeDebugPrivilege	3016	Emerald.exe
Token: SeIncreaseQuotaPrivilege	3148	wmic.exe
Token: SeSecurityPrivilege	3148	wmic.exe
Token: SeTakeOwnershipPrivilege	3148	wmic.exe
Token: SeLoadDriverPrivilege	3148	wmic.exe
Token: SeSystemProfilePrivilege	3148	wmic.exe
Token: SeSystemtimePrivilege	3148	wmic.exe
Token: SeProfSingleProcessPrivilege	3148	wmic.exe
Token: SeIncBasePriorityPrivilege	3148	wmic.exe
Token: SeCreatePagefilePrivilege	3148	wmic.exe
Token: SeBackupPrivilege	3148	wmic.exe
Token: SeRestorePrivilege	3148	wmic.exe
Token: SeShutdownPrivilege	3148	wmic.exe
Token: SeDebugPrivilege	3148	wmic.exe
Token: SeSystemEnvironmentPrivilege	3148	wmic.exe
Token: SeRemoteShutdownPrivilege	3148	wmic.exe
Token: SeUndockPrivilege	3148	wmic.exe
Token: SeManageVolumePrivilege	3148	wmic.exe
Token: 33	3148	wmic.exe
Token: 34	3148	wmic.exe
Token: 35	3148	wmic.exe
Token: 36	3148	wmic.exe
Token: SeIncreaseQuotaPrivilege	3148	wmic.exe
Token: SeSecurityPrivilege	3148	wmic.exe
Token: SeTakeOwnershipPrivilege	3148	wmic.exe
Token: SeLoadDriverPrivilege	3148	wmic.exe
Token: SeSystemProfilePrivilege	3148	wmic.exe
Token: SeSystemtimePrivilege	3148	wmic.exe
Token: SeProfSingleProcessPrivilege	3148	wmic.exe
Token: SeIncBasePriorityPrivilege	3148	wmic.exe
Token: SeCreatePagefilePrivilege	3148	wmic.exe
Token: SeBackupPrivilege	3148	wmic.exe
Token: SeRestorePrivilege	3148	wmic.exe
Token: SeShutdownPrivilege	3148	wmic.exe
Token: SeDebugPrivilege	3148	wmic.exe
Token: SeSystemEnvironmentPrivilege	3148	wmic.exe
Token: SeRemoteShutdownPrivilege	3148	wmic.exe
Token: SeUndockPrivilege	3148	wmic.exe
Token: SeManageVolumePrivilege	3148	wmic.exe
Token: 33	3148	wmic.exe
Token: 34	3148	wmic.exe
Token: 35	3148	wmic.exe
Token: 36	3148	wmic.exe
Token: SeDebugPrivilege	2132	powershell.exe
Token: SeDebugPrivilege	3964	powershell.exe
Token: SeDebugPrivilege	624	powershell.exe
Token: SeDebugPrivilege	4892	powershell.exe
Token: SeIncreaseQuotaPrivilege	3112	wmic.exe
Token: SeSecurityPrivilege	3112	wmic.exe
Token: SeTakeOwnershipPrivilege	3112	wmic.exe
Token: SeLoadDriverPrivilege	3112	wmic.exe
Token: SeSystemProfilePrivilege	3112	wmic.exe
Token: SeSystemtimePrivilege	3112	wmic.exe
Token: SeProfSingleProcessPrivilege	3112	wmic.exe
Token: SeIncBasePriorityPrivilege	3112	wmic.exe
Token: SeCreatePagefilePrivilege	3112	wmic.exe
Token: SeBackupPrivilege	3112	wmic.exe
Token: SeRestorePrivilege	3112	wmic.exe
Token: SeShutdownPrivilege	3112	wmic.exe
Token: SeDebugPrivilege	3112	wmic.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2860	7zG.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3016 wrote to memory of 3148	3016	Emerald.exe	104
PID 3016 wrote to memory of 3148	3016	Emerald.exe	104
PID 3016 wrote to memory of 2300	3016	Emerald.exe	108
PID 3016 wrote to memory of 2300	3016	Emerald.exe	108
PID 3016 wrote to memory of 2132	3016	Emerald.exe	110
PID 3016 wrote to memory of 2132	3016	Emerald.exe	110
PID 3016 wrote to memory of 3964	3016	Emerald.exe	112
PID 3016 wrote to memory of 3964	3016	Emerald.exe	112
PID 3016 wrote to memory of 624	3016	Emerald.exe	114
PID 3016 wrote to memory of 624	3016	Emerald.exe	114
PID 3016 wrote to memory of 4892	3016	Emerald.exe	116
PID 3016 wrote to memory of 4892	3016	Emerald.exe	116
PID 3016 wrote to memory of 3112	3016	Emerald.exe	118
PID 3016 wrote to memory of 3112	3016	Emerald.exe	118
PID 3016 wrote to memory of 1408	3016	Emerald.exe	120
PID 3016 wrote to memory of 1408	3016	Emerald.exe	120
PID 3016 wrote to memory of 2588	3016	Emerald.exe	122
PID 3016 wrote to memory of 2588	3016	Emerald.exe	122
PID 3016 wrote to memory of 3480	3016	Emerald.exe	124
PID 3016 wrote to memory of 3480	3016	Emerald.exe	124
PID 3016 wrote to memory of 2304	3016	Emerald.exe	126
PID 3016 wrote to memory of 2304	3016	Emerald.exe	126
PID 3016 wrote to memory of 1788	3016	Emerald.exe	130
PID 3016 wrote to memory of 1788	3016	Emerald.exe	130
PID 1788 wrote to memory of 1580	1788	cmd.exe	132
PID 1788 wrote to memory of 1580	1788	cmd.exe	132

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2300	attrib.exe

C:\Windows\Explorer.exe
C:\Windows\Explorer.exe /idlist,,"C:\Users\Admin\AppData\Local\Temp\Emerald X.zip"
1⤵
PID:1188

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:2472

C:\Program Files\7-Zip\7zG.exe
"C:\Program Files\7-Zip\7zG.exe" x -o"C:\Users\Admin\AppData\Local\Temp\Emerald X\" -ad -an -ai#7zMap9631:98:7zEvent4757
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
PID:2860

C:\Users\Admin\AppData\Local\Temp\Emerald X\Emerald X\Emerald.exe
"C:\Users\Admin\AppData\Local\Temp\Emerald X\Emerald X\Emerald.exe"
1⤵
- Drops file in Drivers directory
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3016
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3148
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Emerald X\Emerald X\Emerald.exe"
  2⤵
  - Views/modifies file attributes
  PID:2300
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Emerald X\Emerald X\Emerald.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious use of AdjustPrivilegeToken
  PID:2132
- 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 use of AdjustPrivilegeToken
  PID:3964
- 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 use of AdjustPrivilegeToken
  PID:624
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4892
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3112
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1408
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2588
- 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
  PID:3480
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2304
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Emerald X\Emerald X\Emerald.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1788
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1580

C:\Users\Admin\AppData\Local\Temp\Emerald X\Emerald X\Injector.exe
"C:\Users\Admin\AppData\Local\Temp\Emerald X\Emerald X\Injector.exe"
1⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:2548

C:\Windows\system32\NOTEPAD.EXE
"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Local\Temp\Emerald X\Emerald X\logs\log2024-09-04_13-01-28.txt
1⤵
PID:864

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
d28a889fd956d5cb3accfbaf1143eb6f

SHA1
157ba54b365341f8ff06707d996b3635da8446f7

SHA256
21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

SHA512
0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

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

Filesize
948B

MD5
74a6b79d36b4aae8b027a218bc6e1af7

SHA1
0350e46c1df6934903c4820a00b0bc4721779e5f

SHA256
60c64f6803d7ad1408d0a8628100470859b16ef332d5f1bd8bb2debe51251d04

SHA512
60e71435a9a23f4c144d641844f4182ddc9aa4ccd3e99232149a187112dce96458aab9587e9fea46f5dc5a52f5ca758969a04657a2b5b10241d3e4554f7c85e0

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
92382908106bf04aac6575ae0e55073f

SHA1
b164dd606b60ada42fe843963f95e14e92d5d86a

SHA256
1332dc373efa610424b48ae9955247275f4f94cfeecec93a5121784ed8d6b3db

SHA512
d6ee3e3776f683b2a4eaf4fd92e2cd2b9412d85fb57556130d8cabf52e180fb17b5dcdfec9ccd0b3b80bed2816c0bd2d25de35580b859e7799b7cb61071edb3f

Download Submit
C:\Users\Admin\AppData\Local\Temp\Emerald X\Emerald X\Emerald.exe

Filesize
229KB

MD5
f50a9b0c2670af5b0e3371ecdcebed27

SHA1
e114834c05d2e86db3c3d45ccbd46a7c32950167

SHA256
abbf1cd65c8d762019873c47b45e374d0c75cb28ddf754a8ddb35501f3cb63b2

SHA512
21784568e5f27bbd0235fb37d7a7381055da13f27c00b6399bbb09b286bc58a965f00bb925950855392aad57678d34ccd0de4d13b10f9ae7503bc192143a90c6

Download Submit
C:\Users\Admin\AppData\Local\Temp\Emerald X\Emerald X\Injector.exe

Filesize
5.5MB

MD5
072bd8b0166f4e8c134fddd1a91b16c6

SHA1
da0e078b22b6739eb2ae67ef3dd7ac7ee841f96c

SHA256
f84e39b3be2ba74691b82dab25a4d42d13535f138d9c69ffe37d45d90612a34f

SHA512
5ff3173c47a7718c41076507a5c3d8e83021928dead3c82ce6e46b4609afa6ffa4af7cd4af1b779805c00ccd5b9ee5a59144c0507bb17db8fad77b0e144ee828

Download Submit
C:\Users\Admin\AppData\Local\Temp\Emerald X\Emerald X\logs\log2024-09-04_13-01-28.txt

Filesize
357B

MD5
d9c237c5787db2f49f9eb739d4293c89

SHA1
55e93b0190fd1a404f8275ecce119c472fb57dab

SHA256
a97491052fdbdcde030ffb5fb881e504707205d134ea1ee74b22139a202455a7

SHA512
390ccdb262d867191c073ca594a48b96f8cf83df18256bab8f3b0798a87d346269fe68129cabd67b962be8b85b653d2deb4d65f18f5abe7651d1520178c3711d

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_4hqgivna.ike.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2132-116-0x0000023E5A080000-0x0000023E5A0A2000-memory.dmp

Filesize
136KB

Download
memory/3016-138-0x000001ACEC7A0000-0x000001ACEC7F0000-memory.dmp

Filesize
320KB

Download
memory/3016-139-0x000001ACEC6A0000-0x000001ACEC6BE000-memory.dmp

Filesize
120KB

Download
memory/3016-175-0x000001ACEC6F0000-0x000001ACEC6FA000-memory.dmp

Filesize
40KB

Download
memory/3016-176-0x000001ACEC8F0000-0x000001ACEC902000-memory.dmp

Filesize
72KB

Download
memory/3016-137-0x000001ACEC720000-0x000001ACEC796000-memory.dmp

Filesize
472KB

Download
memory/3016-108-0x000001ACD1FF0000-0x000001ACD2030000-memory.dmp

Filesize
256KB

Download