umbral | e73bb9abd07a3075baacff2be37bf9b32bc612de7e03af85ef4d51ff7b494e94

Analysis

max time kernel
122s
max time network
123s
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/Start.bat
Size

59B
MD5

f43a646ca2cde87cc20f3756ad12e51c
SHA1

2788e5da1348b7418356d2a485a40c7fb4697588
SHA256

3ea2dd9cdd54135aaf47b196acbd4b54be5744be4fdfa022600e2cdd1cdf7d0c
SHA512

3788d856a36cba78b147dfc4263682105cd4ddf6f6db701b4cbe95a4b449d397ff5d5f039a93dd77f055bb6db329f908796fb3ff0969a8070647ffc1c13fe7cb

Score

10^/10

umbral credential_access discovery execution stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral9/memory/1988-37-0x0000000000AE0000-0x0000000000B20000-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
2192	powershell.exe
1968	powershell.exe
960	powershell.exe
572	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
2728	main.exe
2728	main.exe
2728	main.exe
2728	main.exe
2728	main.exe
2728	main.exe
2728	main.exe

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

Web Service

T1102

flow	ioc
9	discord.com
10	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
6	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
2636	cmd.exe
2924	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
332	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2924	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1988	upx.exe
2192	powershell.exe
1968	powershell.exe
960	powershell.exe
1960	powershell.exe
572	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1988	upx.exe
Token: SeIncreaseQuotaPrivilege	1256	wmic.exe
Token: SeSecurityPrivilege	1256	wmic.exe
Token: SeTakeOwnershipPrivilege	1256	wmic.exe
Token: SeLoadDriverPrivilege	1256	wmic.exe
Token: SeSystemProfilePrivilege	1256	wmic.exe
Token: SeSystemtimePrivilege	1256	wmic.exe
Token: SeProfSingleProcessPrivilege	1256	wmic.exe
Token: SeIncBasePriorityPrivilege	1256	wmic.exe
Token: SeCreatePagefilePrivilege	1256	wmic.exe
Token: SeBackupPrivilege	1256	wmic.exe
Token: SeRestorePrivilege	1256	wmic.exe
Token: SeShutdownPrivilege	1256	wmic.exe
Token: SeDebugPrivilege	1256	wmic.exe
Token: SeSystemEnvironmentPrivilege	1256	wmic.exe
Token: SeRemoteShutdownPrivilege	1256	wmic.exe
Token: SeUndockPrivilege	1256	wmic.exe
Token: SeManageVolumePrivilege	1256	wmic.exe
Token: 33	1256	wmic.exe
Token: 34	1256	wmic.exe
Token: 35	1256	wmic.exe
Token: SeIncreaseQuotaPrivilege	1256	wmic.exe
Token: SeSecurityPrivilege	1256	wmic.exe
Token: SeTakeOwnershipPrivilege	1256	wmic.exe
Token: SeLoadDriverPrivilege	1256	wmic.exe
Token: SeSystemProfilePrivilege	1256	wmic.exe
Token: SeSystemtimePrivilege	1256	wmic.exe
Token: SeProfSingleProcessPrivilege	1256	wmic.exe
Token: SeIncBasePriorityPrivilege	1256	wmic.exe
Token: SeCreatePagefilePrivilege	1256	wmic.exe
Token: SeBackupPrivilege	1256	wmic.exe
Token: SeRestorePrivilege	1256	wmic.exe
Token: SeShutdownPrivilege	1256	wmic.exe
Token: SeDebugPrivilege	1256	wmic.exe
Token: SeSystemEnvironmentPrivilege	1256	wmic.exe
Token: SeRemoteShutdownPrivilege	1256	wmic.exe
Token: SeUndockPrivilege	1256	wmic.exe
Token: SeManageVolumePrivilege	1256	wmic.exe
Token: 33	1256	wmic.exe
Token: 34	1256	wmic.exe
Token: 35	1256	wmic.exe
Token: SeDebugPrivilege	2192	powershell.exe
Token: SeDebugPrivilege	1968	powershell.exe
Token: SeDebugPrivilege	960	powershell.exe
Token: SeDebugPrivilege	1960	powershell.exe
Token: SeIncreaseQuotaPrivilege	344	wmic.exe
Token: SeSecurityPrivilege	344	wmic.exe
Token: SeTakeOwnershipPrivilege	344	wmic.exe
Token: SeLoadDriverPrivilege	344	wmic.exe
Token: SeSystemProfilePrivilege	344	wmic.exe
Token: SeSystemtimePrivilege	344	wmic.exe
Token: SeProfSingleProcessPrivilege	344	wmic.exe
Token: SeIncBasePriorityPrivilege	344	wmic.exe
Token: SeCreatePagefilePrivilege	344	wmic.exe
Token: SeBackupPrivilege	344	wmic.exe
Token: SeRestorePrivilege	344	wmic.exe
Token: SeShutdownPrivilege	344	wmic.exe
Token: SeDebugPrivilege	344	wmic.exe
Token: SeSystemEnvironmentPrivilege	344	wmic.exe
Token: SeRemoteShutdownPrivilege	344	wmic.exe
Token: SeUndockPrivilege	344	wmic.exe
Token: SeManageVolumePrivilege	344	wmic.exe
Token: 33	344	wmic.exe
Token: 34	344	wmic.exe

Suspicious use of WriteProcessMemory 48 IoCs

description	pid	Process	procid_target
PID 2512 wrote to memory of 2104	2512	cmd.exe	32
PID 2512 wrote to memory of 2104	2512	cmd.exe	32
PID 2512 wrote to memory of 2104	2512	cmd.exe	32
PID 2512 wrote to memory of 1988	2512	cmd.exe	34
PID 2512 wrote to memory of 1988	2512	cmd.exe	34
PID 2512 wrote to memory of 1988	2512	cmd.exe	34
PID 2104 wrote to memory of 2728	2104	main.exe	35
PID 2104 wrote to memory of 2728	2104	main.exe	35
PID 2104 wrote to memory of 2728	2104	main.exe	35
PID 1988 wrote to memory of 1256	1988	upx.exe	36
PID 1988 wrote to memory of 1256	1988	upx.exe	36
PID 1988 wrote to memory of 1256	1988	upx.exe	36
PID 1988 wrote to memory of 1880	1988	upx.exe	39
PID 1988 wrote to memory of 1880	1988	upx.exe	39
PID 1988 wrote to memory of 1880	1988	upx.exe	39
PID 1988 wrote to memory of 2192	1988	upx.exe	41
PID 1988 wrote to memory of 2192	1988	upx.exe	41
PID 1988 wrote to memory of 2192	1988	upx.exe	41
PID 1988 wrote to memory of 1968	1988	upx.exe	43
PID 1988 wrote to memory of 1968	1988	upx.exe	43
PID 1988 wrote to memory of 1968	1988	upx.exe	43
PID 1988 wrote to memory of 960	1988	upx.exe	45
PID 1988 wrote to memory of 960	1988	upx.exe	45
PID 1988 wrote to memory of 960	1988	upx.exe	45
PID 1988 wrote to memory of 1960	1988	upx.exe	47
PID 1988 wrote to memory of 1960	1988	upx.exe	47
PID 1988 wrote to memory of 1960	1988	upx.exe	47
PID 1988 wrote to memory of 344	1988	upx.exe	49
PID 1988 wrote to memory of 344	1988	upx.exe	49
PID 1988 wrote to memory of 344	1988	upx.exe	49
PID 1988 wrote to memory of 2448	1988	upx.exe	51
PID 1988 wrote to memory of 2448	1988	upx.exe	51
PID 1988 wrote to memory of 2448	1988	upx.exe	51
PID 1988 wrote to memory of 304	1988	upx.exe	53
PID 1988 wrote to memory of 304	1988	upx.exe	53
PID 1988 wrote to memory of 304	1988	upx.exe	53
PID 1988 wrote to memory of 572	1988	upx.exe	55
PID 1988 wrote to memory of 572	1988	upx.exe	55
PID 1988 wrote to memory of 572	1988	upx.exe	55
PID 1988 wrote to memory of 332	1988	upx.exe	57
PID 1988 wrote to memory of 332	1988	upx.exe	57
PID 1988 wrote to memory of 332	1988	upx.exe	57
PID 1988 wrote to memory of 2636	1988	upx.exe	59
PID 1988 wrote to memory of 2636	1988	upx.exe	59
PID 1988 wrote to memory of 2636	1988	upx.exe	59
PID 2636 wrote to memory of 2924	2636	cmd.exe	61
PID 2636 wrote to memory of 2924	2636	cmd.exe	61
PID 2636 wrote to memory of 2924	2636	cmd.exe	61

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
1880	attrib.exe

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\Image Logger\Start.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:2512
- C:\Users\Admin\AppData\Local\Temp\Image Logger\Src\main.exe
  Src/main.exe
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2104
- - C:\Users\Admin\AppData\Local\Temp\Image Logger\Src\main.exe
    Src/main.exe
    3⤵
    - Loads dropped DLL
    PID:2728
- 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:1988
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:1256
- - 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:1880
- - 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:2192
- - 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:1968
- - 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:960
- - 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:1960
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" os get Caption
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:344
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" computersystem get totalphysicalmemory
    3⤵
    PID:2448
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    PID:304
- - 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:572
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic" path win32_VideoController get name
    3⤵
    - Detects videocard installed
    PID:332
- - 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:2636
  - - C:\Windows\system32\PING.EXE
      ping localhost
      4⤵
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:2924

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\_MEI21042\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\_MEI21042\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\_MEI21042\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\_MEI21042\python312.dll

Filesize
6.7MB

MD5
550288a078dffc3430c08da888e70810

SHA1
01b1d31f37fb3fd81d893cc5e4a258e976f5884f

SHA256
789a42ac160cef98f8925cb347473eeeb4e70f5513242e7faba5139ba06edf2d

SHA512
7244432fc3716f7ef27630d4e8fbc8180a2542aa97a01d44dca260ab43966dd8ac98b6023400b0478a4809aace1a128f1f4d6e544f2e591a5b436fd4c8a9d723

Download Submit
C:\Users\Admin\AppData\Local\Temp\_MEI21042\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
caf596ba20da659ce77255a98a439362

SHA1
1975d11145f62c3f74673b6d2ec6b8667dfd5e67

SHA256
99e7ca10aa7f26e7fc6ada31234e3a99510575ba2388be01d53b6c789447d6a4

SHA512
7a9f1aca5a48969d06dabdc016d858d93f8e6765d6d3b887708dfc6fcb950c0ccb982cc3aceec70375c286860de6000e9831ef9499c41628960d5ceeafad3a16

Download Submit
\Users\Admin\AppData\Local\Temp\_MEI21042\api-ms-win-core-file-l2-1-0.dll

Filesize
18KB

MD5
bfffa7117fd9b1622c66d949bac3f1d7

SHA1
402b7b8f8dcfd321b1d12fc85a1ee5137a5569b2

SHA256
1ea267a2e6284f17dd548c6f2285e19f7edb15d6e737a55391140ce5cb95225e

SHA512
b319cc7b436b1be165cdf6ffcab8a87fe29de78f7e0b14c8f562be160481fb5483289bd5956fdc1d8660da7a3f86d8eede35c6cc2b7c3d4c852decf4b2dcdb7f

Download Submit
\Users\Admin\AppData\Local\Temp\_MEI21042\api-ms-win-core-processthreads-l1-1-1.dll

Filesize
21KB

MD5
517eb9e2cb671ae49f99173d7f7ce43f

SHA1
4ccf38fed56166ddbf0b7efb4f5314c1f7d3b7ab

SHA256
57cc66bf0909c430364d35d92b64eb8b6a15dc201765403725fe323f39e8ac54

SHA512
492be2445b10f6bfe6c561c1fc6f5d1af6d1365b7449bc57a8f073b44ae49c88e66841f5c258b041547fcd33cbdcb4eb9dd3e24f0924db32720e51651e9286be

Download Submit
memory/572-186-0x0000000001F40000-0x0000000001F48000-memory.dmp

Filesize
32KB

Download
memory/1968-157-0x000000001B770000-0x000000001BA52000-memory.dmp

Filesize
2.9MB

Download
memory/1968-158-0x00000000027F0000-0x00000000027F8000-memory.dmp

Filesize
32KB

Download
memory/1988-37-0x0000000000AE0000-0x0000000000B20000-memory.dmp

Filesize
256KB

Download
memory/1988-145-0x000007FEF5E50000-0x000007FEF683C000-memory.dmp

Filesize
9.9MB

Download
memory/1988-3-0x000007FEF5E53000-0x000007FEF5E54000-memory.dmp

Filesize
4KB

Download
memory/1988-190-0x000007FEF5E50000-0x000007FEF683C000-memory.dmp

Filesize
9.9MB

Download
memory/2192-150-0x000000001B750000-0x000000001BA32000-memory.dmp

Filesize
2.9MB

Download
memory/2192-151-0x0000000002970000-0x0000000002978000-memory.dmp

Filesize
32KB

Download