umbral | bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7

Analysis

max time kernel
136s
max time network
105s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
23/08/2024, 02:39

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General

Target
bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe
Size 228KB
Sample240823-c5akms1ekd
SHA256 bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7
MD5 92fe53ca6c8f1a424db45bb3f7cdfe56
SHA1 a6d4e261875b162f18f2cbbcc6411cec7b59be37
SHA512 c4ce50e070a07626fd766212428b15df7d4f4fe680acdc9b0ba084156aea4e4443dd76ddba8ff9d9551a5c00b53d784a716caa95df1a78d80a65dd1bca2c4a16
SSDEEP 6144:OloZM+rIkd8g+EtXHkv/iD4QL6XYe5xy4XKYZd8PRb8e1mLpsi:YoZtL+EP8QL6XYe5xy4XKYZd8hil
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/3184-1-0x000002085A3B0000-0x000002085A3F0000-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
4616	powershell.exe
4532	powershell.exe
2316	powershell.exe
2648	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.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
32	discord.com
31	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
10	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
1976	cmd.exe
2060	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4188	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2060	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
3184	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe
4616	powershell.exe
4616	powershell.exe
4532	powershell.exe
4532	powershell.exe
2316	powershell.exe
2316	powershell.exe
2740	powershell.exe
2740	powershell.exe
2648	powershell.exe
2648	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3184	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe
Token: SeIncreaseQuotaPrivilege	1704	wmic.exe
Token: SeSecurityPrivilege	1704	wmic.exe
Token: SeTakeOwnershipPrivilege	1704	wmic.exe
Token: SeLoadDriverPrivilege	1704	wmic.exe
Token: SeSystemProfilePrivilege	1704	wmic.exe
Token: SeSystemtimePrivilege	1704	wmic.exe
Token: SeProfSingleProcessPrivilege	1704	wmic.exe
Token: SeIncBasePriorityPrivilege	1704	wmic.exe
Token: SeCreatePagefilePrivilege	1704	wmic.exe
Token: SeBackupPrivilege	1704	wmic.exe
Token: SeRestorePrivilege	1704	wmic.exe
Token: SeShutdownPrivilege	1704	wmic.exe
Token: SeDebugPrivilege	1704	wmic.exe
Token: SeSystemEnvironmentPrivilege	1704	wmic.exe
Token: SeRemoteShutdownPrivilege	1704	wmic.exe
Token: SeUndockPrivilege	1704	wmic.exe
Token: SeManageVolumePrivilege	1704	wmic.exe
Token: 33	1704	wmic.exe
Token: 34	1704	wmic.exe
Token: 35	1704	wmic.exe
Token: 36	1704	wmic.exe
Token: SeIncreaseQuotaPrivilege	1704	wmic.exe
Token: SeSecurityPrivilege	1704	wmic.exe
Token: SeTakeOwnershipPrivilege	1704	wmic.exe
Token: SeLoadDriverPrivilege	1704	wmic.exe
Token: SeSystemProfilePrivilege	1704	wmic.exe
Token: SeSystemtimePrivilege	1704	wmic.exe
Token: SeProfSingleProcessPrivilege	1704	wmic.exe
Token: SeIncBasePriorityPrivilege	1704	wmic.exe
Token: SeCreatePagefilePrivilege	1704	wmic.exe
Token: SeBackupPrivilege	1704	wmic.exe
Token: SeRestorePrivilege	1704	wmic.exe
Token: SeShutdownPrivilege	1704	wmic.exe
Token: SeDebugPrivilege	1704	wmic.exe
Token: SeSystemEnvironmentPrivilege	1704	wmic.exe
Token: SeRemoteShutdownPrivilege	1704	wmic.exe
Token: SeUndockPrivilege	1704	wmic.exe
Token: SeManageVolumePrivilege	1704	wmic.exe
Token: 33	1704	wmic.exe
Token: 34	1704	wmic.exe
Token: 35	1704	wmic.exe
Token: 36	1704	wmic.exe
Token: SeDebugPrivilege	4616	powershell.exe
Token: SeDebugPrivilege	4532	powershell.exe
Token: SeDebugPrivilege	2316	powershell.exe
Token: SeDebugPrivilege	2740	powershell.exe
Token: SeIncreaseQuotaPrivilege	4120	wmic.exe
Token: SeSecurityPrivilege	4120	wmic.exe
Token: SeTakeOwnershipPrivilege	4120	wmic.exe
Token: SeLoadDriverPrivilege	4120	wmic.exe
Token: SeSystemProfilePrivilege	4120	wmic.exe
Token: SeSystemtimePrivilege	4120	wmic.exe
Token: SeProfSingleProcessPrivilege	4120	wmic.exe
Token: SeIncBasePriorityPrivilege	4120	wmic.exe
Token: SeCreatePagefilePrivilege	4120	wmic.exe
Token: SeBackupPrivilege	4120	wmic.exe
Token: SeRestorePrivilege	4120	wmic.exe
Token: SeShutdownPrivilege	4120	wmic.exe
Token: SeDebugPrivilege	4120	wmic.exe
Token: SeSystemEnvironmentPrivilege	4120	wmic.exe
Token: SeRemoteShutdownPrivilege	4120	wmic.exe
Token: SeUndockPrivilege	4120	wmic.exe
Token: SeManageVolumePrivilege	4120	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3184 wrote to memory of 1704	3184	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	84
PID 3184 wrote to memory of 1704	3184	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	84
PID 3184 wrote to memory of 2640	3184	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	90
PID 3184 wrote to memory of 2640	3184	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	90
PID 3184 wrote to memory of 4616	3184	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	92
PID 3184 wrote to memory of 4616	3184	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	92
PID 3184 wrote to memory of 4532	3184	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	94
PID 3184 wrote to memory of 4532	3184	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	94
PID 3184 wrote to memory of 2316	3184	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	96
PID 3184 wrote to memory of 2316	3184	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	96
PID 3184 wrote to memory of 2740	3184	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	98
PID 3184 wrote to memory of 2740	3184	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	98
PID 3184 wrote to memory of 4120	3184	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	103
PID 3184 wrote to memory of 4120	3184	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	103
PID 3184 wrote to memory of 3276	3184	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	105
PID 3184 wrote to memory of 3276	3184	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	105
PID 3184 wrote to memory of 4416	3184	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	107
PID 3184 wrote to memory of 4416	3184	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	107
PID 3184 wrote to memory of 2648	3184	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	109
PID 3184 wrote to memory of 2648	3184	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	109
PID 3184 wrote to memory of 4188	3184	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	111
PID 3184 wrote to memory of 4188	3184	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	111
PID 3184 wrote to memory of 1976	3184	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	113
PID 3184 wrote to memory of 1976	3184	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	113
PID 1976 wrote to memory of 2060	1976	cmd.exe	115
PID 1976 wrote to memory of 2060	1976	cmd.exe	115

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2640	attrib.exe

C:\Users\Admin\AppData\Local\Temp\bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe
"C:\Users\Admin\AppData\Local\Temp\bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3184
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1704
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe"
  2⤵
  - Views/modifies file attributes
  PID:2640
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4616
- 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 behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4532
- 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 behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2316
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2740
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4120
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:3276
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4416
- 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
  - Suspicious behavior: EnumeratesProcesses
  PID:2648
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4188
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1976
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2060

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

powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Size 2KB
SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
MD5 d85ba6ff808d9e5444a4b369f5bc2730
SHA1 31aa9d96590fff6981b315e0b391b575e4c0804a
SHA512 8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb
MD5 77d622bb1a5b250869a3238b9bc1402b
SHA1 d47f4003c2554b9dfc4c16f22460b331886b191b
SHA512 d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 948B
SHA256 f61c0e17ef24ce95d3d00170c5553c9b5b536d24c0d8e6e7480b3e2eb3855a02
MD5 994d48c590292933efa0627922c9fc59
SHA1 696a9fed9578a4f0f73e598f9d71a0c1f9d04090
SHA512 f61d859fc00bf1009e6d72a0536fcd3d95d7f06016ed44dcdc1d91a872dad8abda02c7f409dcb9d0e5ea8c8c75b0d8683a60ea57045639402c37eca9eab77940
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc
MD5 276798eeb29a49dc6e199768bc9c2e71
SHA1 5fdc8ccb897ac2df7476fbb07517aca5b7a6205b
SHA512 0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 755daf72f2f5e983abb009c3b1eef4c7c660999f5ff581545bbcae7088c17c69
MD5 ca58d1913d3261f116a299095e04f734
SHA1 941d13d0c8c65adb6513f23991acfa0d62facdea
SHA512 87b0d8c9a5348235e9ad6416e09665764db1af408bf763857dc40e39411fa0cf405e3e8b9f0b8540c72aa874059d1dee865aa0cff8dba0fde5779ec9480b5e40
MD5 SHA1 SHA512

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__PSScriptPolicyTest_ptj00qnv.bkt.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ptj00qnv.bkt.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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memory/3184-34-0x000002085C040000-0x000002085C05E000-memory.dmp

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memory/3184-32-0x00000208748D0000-0x0000020874946000-memory.dmp

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memory/3184-33-0x000002085C090000-0x000002085C0E0000-memory.dmp

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memory/3184-0-0x00007FFD766D3000-0x00007FFD766D5000-memory.dmp

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memory/3184-2-0x00007FFD766D0000-0x00007FFD77191000-memory.dmp

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memory/3184-70-0x000002085C070000-0x000002085C07A000-memory.dmp

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memory/3184-71-0x0000020874BC0000-0x0000020874BD2000-memory.dmp

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memory/3184-1-0x000002085A3B0000-0x000002085A3F0000-memory.dmp

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memory/3184-89-0x00007FFD766D0000-0x00007FFD77191000-memory.dmp

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memory/4616-17-0x00007FFD766D0000-0x00007FFD77191000-memory.dmp

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memory/4616-10-0x000002A1335C0000-0x000002A1335E2000-memory.dmp

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memory/4616-4-0x00007FFD766D0000-0x00007FFD77191000-memory.dmp

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memory/4616-3-0x00007FFD766D0000-0x00007FFD77191000-memory.dmp

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