umbral | e73bb9abd07a3075baacff2be37bf9b32bc612de7e03af85ef4d51ff7b494e94

Analysis

max time kernel
117s
max time network
121s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
11-09-2024 20:28

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General

Target

Image Logger/Setup.bat
Size

187B
MD5

43b1a15e2307916cb5d7868cfe1fe562
SHA1

84b20014f6138b2f526047d4cbf531037d4d3a0c
SHA256

f330318d896d9b389dcb927c907c7ad599603b002435119403040c9a65beb125
SHA512

689e974127c6ed97cb486e3597de090ad9f89faa2818c43ce11186d3f4a184a4b4a239abe1b86079a2c19da67ec3ff22315a0fc0e887905ab323129ef53c2555

Score

10^/10

umbral credential_access discovery execution stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2680-60-0x0000000000910000-0x0000000000950000-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
2368	powershell.exe
1280	powershell.exe
628	powershell.exe
1040	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Loads dropped DLL 7 IoCs

pid	Process
2884	main.exe
2884	main.exe
2884	main.exe
2884	main.exe
2884	main.exe
2884	main.exe
2884	main.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
7	discord.com
8	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
4	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
2824	PING.EXE
2244	cmd.exe

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
340	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2824	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2680	upx.exe
2368	powershell.exe
1280	powershell.exe
628	powershell.exe
1372	powershell.exe
1040	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2680	upx.exe
Token: SeIncreaseQuotaPrivilege	1960	wmic.exe
Token: SeSecurityPrivilege	1960	wmic.exe
Token: SeTakeOwnershipPrivilege	1960	wmic.exe
Token: SeLoadDriverPrivilege	1960	wmic.exe
Token: SeSystemProfilePrivilege	1960	wmic.exe
Token: SeSystemtimePrivilege	1960	wmic.exe
Token: SeProfSingleProcessPrivilege	1960	wmic.exe
Token: SeIncBasePriorityPrivilege	1960	wmic.exe
Token: SeCreatePagefilePrivilege	1960	wmic.exe
Token: SeBackupPrivilege	1960	wmic.exe
Token: SeRestorePrivilege	1960	wmic.exe
Token: SeShutdownPrivilege	1960	wmic.exe
Token: SeDebugPrivilege	1960	wmic.exe
Token: SeSystemEnvironmentPrivilege	1960	wmic.exe
Token: SeRemoteShutdownPrivilege	1960	wmic.exe
Token: SeUndockPrivilege	1960	wmic.exe
Token: SeManageVolumePrivilege	1960	wmic.exe
Token: 33	1960	wmic.exe
Token: 34	1960	wmic.exe
Token: 35	1960	wmic.exe
Token: SeIncreaseQuotaPrivilege	1960	wmic.exe
Token: SeSecurityPrivilege	1960	wmic.exe
Token: SeTakeOwnershipPrivilege	1960	wmic.exe
Token: SeLoadDriverPrivilege	1960	wmic.exe
Token: SeSystemProfilePrivilege	1960	wmic.exe
Token: SeSystemtimePrivilege	1960	wmic.exe
Token: SeProfSingleProcessPrivilege	1960	wmic.exe
Token: SeIncBasePriorityPrivilege	1960	wmic.exe
Token: SeCreatePagefilePrivilege	1960	wmic.exe
Token: SeBackupPrivilege	1960	wmic.exe
Token: SeRestorePrivilege	1960	wmic.exe
Token: SeShutdownPrivilege	1960	wmic.exe
Token: SeDebugPrivilege	1960	wmic.exe
Token: SeSystemEnvironmentPrivilege	1960	wmic.exe
Token: SeRemoteShutdownPrivilege	1960	wmic.exe
Token: SeUndockPrivilege	1960	wmic.exe
Token: SeManageVolumePrivilege	1960	wmic.exe
Token: 33	1960	wmic.exe
Token: 34	1960	wmic.exe
Token: 35	1960	wmic.exe
Token: SeDebugPrivilege	2368	powershell.exe
Token: SeDebugPrivilege	1280	powershell.exe
Token: SeDebugPrivilege	628	powershell.exe
Token: SeDebugPrivilege	1372	powershell.exe
Token: SeIncreaseQuotaPrivilege	2860	wmic.exe
Token: SeSecurityPrivilege	2860	wmic.exe
Token: SeTakeOwnershipPrivilege	2860	wmic.exe
Token: SeLoadDriverPrivilege	2860	wmic.exe
Token: SeSystemProfilePrivilege	2860	wmic.exe
Token: SeSystemtimePrivilege	2860	wmic.exe
Token: SeProfSingleProcessPrivilege	2860	wmic.exe
Token: SeIncBasePriorityPrivilege	2860	wmic.exe
Token: SeCreatePagefilePrivilege	2860	wmic.exe
Token: SeBackupPrivilege	2860	wmic.exe
Token: SeRestorePrivilege	2860	wmic.exe
Token: SeShutdownPrivilege	2860	wmic.exe
Token: SeDebugPrivilege	2860	wmic.exe
Token: SeSystemEnvironmentPrivilege	2860	wmic.exe
Token: SeRemoteShutdownPrivilege	2860	wmic.exe
Token: SeUndockPrivilege	2860	wmic.exe
Token: SeManageVolumePrivilege	2860	wmic.exe
Token: 33	2860	wmic.exe
Token: 34	2860	wmic.exe

Suspicious use of WriteProcessMemory 48 IoCs

description	pid	Process	procid_target
PID 2232 wrote to memory of 2716	2232	cmd.exe	31
PID 2232 wrote to memory of 2716	2232	cmd.exe	31
PID 2232 wrote to memory of 2716	2232	cmd.exe	31
PID 2232 wrote to memory of 2680	2232	cmd.exe	32
PID 2232 wrote to memory of 2680	2232	cmd.exe	32
PID 2232 wrote to memory of 2680	2232	cmd.exe	32
PID 2716 wrote to memory of 2884	2716	main.exe	34
PID 2716 wrote to memory of 2884	2716	main.exe	34
PID 2716 wrote to memory of 2884	2716	main.exe	34
PID 2680 wrote to memory of 1960	2680	upx.exe	35
PID 2680 wrote to memory of 1960	2680	upx.exe	35
PID 2680 wrote to memory of 1960	2680	upx.exe	35
PID 2680 wrote to memory of 1996	2680	upx.exe	38
PID 2680 wrote to memory of 1996	2680	upx.exe	38
PID 2680 wrote to memory of 1996	2680	upx.exe	38
PID 2680 wrote to memory of 2368	2680	upx.exe	40
PID 2680 wrote to memory of 2368	2680	upx.exe	40
PID 2680 wrote to memory of 2368	2680	upx.exe	40
PID 2680 wrote to memory of 1280	2680	upx.exe	42
PID 2680 wrote to memory of 1280	2680	upx.exe	42
PID 2680 wrote to memory of 1280	2680	upx.exe	42
PID 2680 wrote to memory of 628	2680	upx.exe	44
PID 2680 wrote to memory of 628	2680	upx.exe	44
PID 2680 wrote to memory of 628	2680	upx.exe	44
PID 2680 wrote to memory of 1372	2680	upx.exe	46
PID 2680 wrote to memory of 1372	2680	upx.exe	46
PID 2680 wrote to memory of 1372	2680	upx.exe	46
PID 2680 wrote to memory of 2860	2680	upx.exe	48
PID 2680 wrote to memory of 2860	2680	upx.exe	48
PID 2680 wrote to memory of 2860	2680	upx.exe	48
PID 2680 wrote to memory of 468	2680	upx.exe	50
PID 2680 wrote to memory of 468	2680	upx.exe	50
PID 2680 wrote to memory of 468	2680	upx.exe	50
PID 2680 wrote to memory of 576	2680	upx.exe	52
PID 2680 wrote to memory of 576	2680	upx.exe	52
PID 2680 wrote to memory of 576	2680	upx.exe	52
PID 2680 wrote to memory of 1040	2680	upx.exe	54
PID 2680 wrote to memory of 1040	2680	upx.exe	54
PID 2680 wrote to memory of 1040	2680	upx.exe	54
PID 2680 wrote to memory of 340	2680	upx.exe	56
PID 2680 wrote to memory of 340	2680	upx.exe	56
PID 2680 wrote to memory of 340	2680	upx.exe	56
PID 2680 wrote to memory of 2244	2680	upx.exe	58
PID 2680 wrote to memory of 2244	2680	upx.exe	58
PID 2680 wrote to memory of 2244	2680	upx.exe	58
PID 2244 wrote to memory of 2824	2244	cmd.exe	60
PID 2244 wrote to memory of 2824	2244	cmd.exe	60
PID 2244 wrote to memory of 2824	2244	cmd.exe	60

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
1996	attrib.exe

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\Image Logger\Setup.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:2232
- C:\Users\Admin\AppData\Local\Temp\Image Logger\Src\main.exe
  Src/main.exe
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2716
- - C:\Users\Admin\AppData\Local\Temp\Image Logger\Src\main.exe
    Src/main.exe
    3⤵
    - Loads dropped DLL
    PID:2884
- C:\Users\Admin\AppData\Local\Temp\Image Logger\Src\Files\upx.exe
  Src/Files/upx.exe
  2⤵
  - Drops file in Drivers directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2680
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:1960
- - C:\Windows\system32\attrib.exe
    "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Image Logger\Src\Files\upx.exe"
    3⤵
    - Views/modifies file attributes
    PID:1996
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Image Logger\Src\Files\upx.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2368
- - 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
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1280
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:628
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1372
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" os get Caption
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:2860
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" computersystem get totalphysicalmemory
    3⤵
    PID:468
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    PID:576
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    PID:1040
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic" path win32_VideoController get name
    3⤵
    - Detects videocard installed
    PID:340
- - C:\Windows\system32\cmd.exe
    "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Image Logger\Src\Files\upx.exe" && pause
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Suspicious use of WriteProcessMemory
    PID:2244
  - - C:\Windows\system32\PING.EXE
      ping localhost
      4⤵
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:2824

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

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\_MEI27162\api-ms-win-core-file-l1-2-0.dll

Filesize
21KB

MD5
1c58526d681efe507deb8f1935c75487

SHA1
0e6d328faf3563f2aae029bc5f2272fb7a742672

SHA256
ef13dce8f71173315dfc64ab839b033ab19a968ee15230e9d4d2c9d558efeee2

SHA512
8edb9a0022f417648e2ece9e22c96e2727976332025c3e7d8f15bcf6d7d97e680d1bf008eb28e2e0bd57787dcbb71d38b2deb995b8edc35fa6852ab1d593f3d1

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI27162\api-ms-win-core-file-l2-1-0.dll

Filesize
18KB

MD5
bfffa7117fd9b1622c66d949bac3f1d7

SHA1
402b7b8f8dcfd321b1d12fc85a1ee5137a5569b2

SHA256
1ea267a2e6284f17dd548c6f2285e19f7edb15d6e737a55391140ce5cb95225e

SHA512
b319cc7b436b1be165cdf6ffcab8a87fe29de78f7e0b14c8f562be160481fb5483289bd5956fdc1d8660da7a3f86d8eede35c6cc2b7c3d4c852decf4b2dcdb7f

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI27162\api-ms-win-core-localization-l1-2-0.dll

Filesize
21KB

MD5
724223109e49cb01d61d63a8be926b8f

SHA1
072a4d01e01dbbab7281d9bd3add76f9a3c8b23b

SHA256
4e975f618df01a492ae433dff0dd713774d47568e44c377ceef9e5b34aad1210

SHA512
19b0065b894dc66c30a602c9464f118e7f84d83010e74457d48e93aaca4422812b093b15247b24d5c398b42ef0319108700543d13f156067b169ccfb4d7b6b7c

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI27162\api-ms-win-core-processthreads-l1-1-1.dll

Filesize
21KB

MD5
517eb9e2cb671ae49f99173d7f7ce43f

SHA1
4ccf38fed56166ddbf0b7efb4f5314c1f7d3b7ab

SHA256
57cc66bf0909c430364d35d92b64eb8b6a15dc201765403725fe323f39e8ac54

SHA512
492be2445b10f6bfe6c561c1fc6f5d1af6d1365b7449bc57a8f073b44ae49c88e66841f5c258b041547fcd33cbdcb4eb9dd3e24f0924db32720e51651e9286be

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI27162\api-ms-win-core-timezone-l1-1-0.dll

Filesize
21KB

MD5
d12403ee11359259ba2b0706e5e5111c

SHA1
03cc7827a30fd1dee38665c0cc993b4b533ac138

SHA256
f60e1751a6ac41f08e46480bf8e6521b41e2e427803996b32bdc5e78e9560781

SHA512
9004f4e59835af57f02e8d9625814db56f0e4a98467041da6f1367ef32366ad96e0338d48fff7cc65839a24148e2d9989883bcddc329d9f4d27cae3f843117d0

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI27162\python312.dll

Filesize
6.7MB

MD5
550288a078dffc3430c08da888e70810

SHA1
01b1d31f37fb3fd81d893cc5e4a258e976f5884f

SHA256
789a42ac160cef98f8925cb347473eeeb4e70f5513242e7faba5139ba06edf2d

SHA512
7244432fc3716f7ef27630d4e8fbc8180a2542aa97a01d44dca260ab43966dd8ac98b6023400b0478a4809aace1a128f1f4d6e544f2e591a5b436fd4c8a9d723

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI27162\ucrtbase.dll

Filesize
992KB

MD5
0e0bac3d1dcc1833eae4e3e4cf83c4ef

SHA1
4189f4459c54e69c6d3155a82524bda7549a75a6

SHA256
8a91052ef261b5fbf3223ae9ce789af73dfe1e9b0ba5bdbc4d564870a24f2bae

SHA512
a45946e3971816f66dd7ea3788aacc384a9e95011500b458212dc104741315b85659e0d56a41570731d338bdf182141c093d3ced222c007038583ceb808e26fd

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
b038c412732c9a5f90cd551b37410fd5

SHA1
514bb68da4f3b7c63441edbb289c655f2d41ad97

SHA256
0e35b8e855ad45571381e5fa3354ed2baf383cd708f728238be41afdf41ef4e4

SHA512
b245176fa3f7abdf17107c652664d4c13819328f61e9b300896ff902ac212b69c8693685c1fba5ecd23166146b2de39cd59f52fea6c6ee8b7ea810363000dce7

Download Submit
memory/1040-186-0x0000000001FC0000-0x0000000001FC8000-memory.dmp

Filesize
32KB

Download
memory/1280-157-0x000000001B550000-0x000000001B832000-memory.dmp

Filesize
2.9MB

Download
memory/1280-158-0x0000000002690000-0x0000000002698000-memory.dmp

Filesize
32KB

Download
memory/2368-150-0x000000001B610000-0x000000001B8F2000-memory.dmp

Filesize
2.9MB

Download
memory/2368-151-0x0000000002860000-0x0000000002868000-memory.dmp

Filesize
32KB

Download
memory/2680-60-0x0000000000910000-0x0000000000950000-memory.dmp

Filesize
256KB

Download
memory/2680-16-0x000007FEF5E23000-0x000007FEF5E24000-memory.dmp

Filesize
4KB

Download
memory/2680-145-0x000007FEF5E20000-0x000007FEF680C000-memory.dmp

Filesize
9.9MB

Download
memory/2680-190-0x000007FEF5E20000-0x000007FEF680C000-memory.dmp

Filesize
9.9MB

Download