umbral | bf071edf3408e6496ce99865ad5503b710a6f02eba715f3a8ff471672c600e98

Analysis

max time kernel
16s
max time network
16s
platform
windows7_x64
resource
win7-20240705-en
resource tags

arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
submitted
18-07-2024 08:26

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General

Target

8d053f5224f1e9023174aff9c4a30930N.exe
Size

1.1MB
MD5

8d053f5224f1e9023174aff9c4a30930
SHA1

4780b25f7cde7d9e88d437fc749009471df400c7
SHA256

bf071edf3408e6496ce99865ad5503b710a6f02eba715f3a8ff471672c600e98
SHA512

f065df05bb2057c271fdcc076c29a2dd5bacdade2e1540383d74229b36a4ef9ecd527fe582227055b9aabb79bcc05ee1ed3326ef253c5b79deb0fa92c236007c
SSDEEP

24576:faHMv6CorjSnypQDaG9u1WTI8SvtsyVtG1TOMdRYqcBO:f1vOjlpQDaGjVc

Score

10^/10

umbral execution spyware stealer

Malware Config

Extracted

Family

umbral

https://discord.com/api/webhooks/1260648854106279966/keEurbS-DAu9o9HNLNkSZdNBwk9KX-R3JUCBdBHxavFpGd9oS74vrFD6KpTlKwSh5bvL

Signatures

Detect Umbral payload 3 IoCs

resource	yara_rule
behavioral1/memory/288-1-0x00000000009B0000-0x0000000000AD4000-memory.dmp	family_umbral
behavioral1/files/0x000b000000016d35-11.dat	family_umbral
behavioral1/memory/2720-19-0x00000000000B0000-0x00000000000F0000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2644	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
2080	svchost.exe
2720	explorer.exe

Loads dropped DLL 2 IoCs

pid	Process
288	8d053f5224f1e9023174aff9c4a30930N.exe
288	8d053f5224f1e9023174aff9c4a30930N.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
8	discord.com
7	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

AutoIT Executable 2 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/memory/288-1-0x00000000009B0000-0x0000000000AD4000-memory.dmp	autoit_exe
behavioral1/files/0x0008000000012117-5.dat	autoit_exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2208	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2524	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2720	explorer.exe
2644	powershell.exe
2468	powershell.exe
2300	powershell.exe
1736	powershell.exe
2072	powershell.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2080	svchost.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2720	explorer.exe
Token: SeIncreaseQuotaPrivilege	2260	wmic.exe
Token: SeSecurityPrivilege	2260	wmic.exe
Token: SeTakeOwnershipPrivilege	2260	wmic.exe
Token: SeLoadDriverPrivilege	2260	wmic.exe
Token: SeSystemProfilePrivilege	2260	wmic.exe
Token: SeSystemtimePrivilege	2260	wmic.exe
Token: SeProfSingleProcessPrivilege	2260	wmic.exe
Token: SeIncBasePriorityPrivilege	2260	wmic.exe
Token: SeCreatePagefilePrivilege	2260	wmic.exe
Token: SeBackupPrivilege	2260	wmic.exe
Token: SeRestorePrivilege	2260	wmic.exe
Token: SeShutdownPrivilege	2260	wmic.exe
Token: SeDebugPrivilege	2260	wmic.exe
Token: SeSystemEnvironmentPrivilege	2260	wmic.exe
Token: SeRemoteShutdownPrivilege	2260	wmic.exe
Token: SeUndockPrivilege	2260	wmic.exe
Token: SeManageVolumePrivilege	2260	wmic.exe
Token: 33	2260	wmic.exe
Token: 34	2260	wmic.exe
Token: 35	2260	wmic.exe
Token: SeIncreaseQuotaPrivilege	2260	wmic.exe
Token: SeSecurityPrivilege	2260	wmic.exe
Token: SeTakeOwnershipPrivilege	2260	wmic.exe
Token: SeLoadDriverPrivilege	2260	wmic.exe
Token: SeSystemProfilePrivilege	2260	wmic.exe
Token: SeSystemtimePrivilege	2260	wmic.exe
Token: SeProfSingleProcessPrivilege	2260	wmic.exe
Token: SeIncBasePriorityPrivilege	2260	wmic.exe
Token: SeCreatePagefilePrivilege	2260	wmic.exe
Token: SeBackupPrivilege	2260	wmic.exe
Token: SeRestorePrivilege	2260	wmic.exe
Token: SeShutdownPrivilege	2260	wmic.exe
Token: SeDebugPrivilege	2260	wmic.exe
Token: SeSystemEnvironmentPrivilege	2260	wmic.exe
Token: SeRemoteShutdownPrivilege	2260	wmic.exe
Token: SeUndockPrivilege	2260	wmic.exe
Token: SeManageVolumePrivilege	2260	wmic.exe
Token: 33	2260	wmic.exe
Token: 34	2260	wmic.exe
Token: 35	2260	wmic.exe
Token: SeDebugPrivilege	2644	powershell.exe
Token: SeDebugPrivilege	2468	powershell.exe
Token: SeDebugPrivilege	2300	powershell.exe
Token: SeDebugPrivilege	1736	powershell.exe
Token: SeIncreaseQuotaPrivilege	848	wmic.exe
Token: SeSecurityPrivilege	848	wmic.exe
Token: SeTakeOwnershipPrivilege	848	wmic.exe
Token: SeLoadDriverPrivilege	848	wmic.exe
Token: SeSystemProfilePrivilege	848	wmic.exe
Token: SeSystemtimePrivilege	848	wmic.exe
Token: SeProfSingleProcessPrivilege	848	wmic.exe
Token: SeIncBasePriorityPrivilege	848	wmic.exe
Token: SeCreatePagefilePrivilege	848	wmic.exe
Token: SeBackupPrivilege	848	wmic.exe
Token: SeRestorePrivilege	848	wmic.exe
Token: SeShutdownPrivilege	848	wmic.exe
Token: SeDebugPrivilege	848	wmic.exe
Token: SeSystemEnvironmentPrivilege	848	wmic.exe
Token: SeRemoteShutdownPrivilege	848	wmic.exe
Token: SeUndockPrivilege	848	wmic.exe
Token: SeManageVolumePrivilege	848	wmic.exe
Token: 33	848	wmic.exe
Token: 34	848	wmic.exe

Suspicious use of WriteProcessMemory 47 IoCs

description	pid	Process	procid_target
PID 288 wrote to memory of 2080	288	8d053f5224f1e9023174aff9c4a30930N.exe	30
PID 288 wrote to memory of 2080	288	8d053f5224f1e9023174aff9c4a30930N.exe	30
PID 288 wrote to memory of 2080	288	8d053f5224f1e9023174aff9c4a30930N.exe	30
PID 288 wrote to memory of 2080	288	8d053f5224f1e9023174aff9c4a30930N.exe	30
PID 288 wrote to memory of 2720	288	8d053f5224f1e9023174aff9c4a30930N.exe	31
PID 288 wrote to memory of 2720	288	8d053f5224f1e9023174aff9c4a30930N.exe	31
PID 288 wrote to memory of 2720	288	8d053f5224f1e9023174aff9c4a30930N.exe	31
PID 288 wrote to memory of 2720	288	8d053f5224f1e9023174aff9c4a30930N.exe	31
PID 2720 wrote to memory of 2260	2720	explorer.exe	32
PID 2720 wrote to memory of 2260	2720	explorer.exe	32
PID 2720 wrote to memory of 2260	2720	explorer.exe	32
PID 2720 wrote to memory of 2108	2720	explorer.exe	35
PID 2720 wrote to memory of 2108	2720	explorer.exe	35
PID 2720 wrote to memory of 2108	2720	explorer.exe	35
PID 2720 wrote to memory of 2644	2720	explorer.exe	37
PID 2720 wrote to memory of 2644	2720	explorer.exe	37
PID 2720 wrote to memory of 2644	2720	explorer.exe	37
PID 2720 wrote to memory of 2468	2720	explorer.exe	39
PID 2720 wrote to memory of 2468	2720	explorer.exe	39
PID 2720 wrote to memory of 2468	2720	explorer.exe	39
PID 2720 wrote to memory of 2300	2720	explorer.exe	41
PID 2720 wrote to memory of 2300	2720	explorer.exe	41
PID 2720 wrote to memory of 2300	2720	explorer.exe	41
PID 2720 wrote to memory of 1736	2720	explorer.exe	43
PID 2720 wrote to memory of 1736	2720	explorer.exe	43
PID 2720 wrote to memory of 1736	2720	explorer.exe	43
PID 2720 wrote to memory of 848	2720	explorer.exe	45
PID 2720 wrote to memory of 848	2720	explorer.exe	45
PID 2720 wrote to memory of 848	2720	explorer.exe	45
PID 2720 wrote to memory of 1216	2720	explorer.exe	47
PID 2720 wrote to memory of 1216	2720	explorer.exe	47
PID 2720 wrote to memory of 1216	2720	explorer.exe	47
PID 2720 wrote to memory of 2968	2720	explorer.exe	49
PID 2720 wrote to memory of 2968	2720	explorer.exe	49
PID 2720 wrote to memory of 2968	2720	explorer.exe	49
PID 2720 wrote to memory of 2072	2720	explorer.exe	51
PID 2720 wrote to memory of 2072	2720	explorer.exe	51
PID 2720 wrote to memory of 2072	2720	explorer.exe	51
PID 2720 wrote to memory of 2208	2720	explorer.exe	53
PID 2720 wrote to memory of 2208	2720	explorer.exe	53
PID 2720 wrote to memory of 2208	2720	explorer.exe	53
PID 2720 wrote to memory of 604	2720	explorer.exe	55
PID 2720 wrote to memory of 604	2720	explorer.exe	55
PID 2720 wrote to memory of 604	2720	explorer.exe	55
PID 604 wrote to memory of 2524	604	cmd.exe	57
PID 604 wrote to memory of 2524	604	cmd.exe	57
PID 604 wrote to memory of 2524	604	cmd.exe	57

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2108	attrib.exe

C:\Users\Admin\AppData\Local\Temp\8d053f5224f1e9023174aff9c4a30930N.exe
"C:\Users\Admin\AppData\Local\Temp\8d053f5224f1e9023174aff9c4a30930N.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:288
- C:\Users\Admin\AppData\Local\Temp\svchost.exe
  "C:\Users\Admin\AppData\Local\Temp\svchost.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: GetForegroundWindowSpam
  PID:2080
- C:\Users\Admin\AppData\Local\Temp\explorer.exe
  "C:\Users\Admin\AppData\Local\Temp\explorer.exe"
  2⤵
  - Drops file in Drivers directory
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2720
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:2260
- - C:\Windows\system32\attrib.exe
    "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\explorer.exe"
    3⤵
    - Views/modifies file attributes
    PID:2108
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\explorer.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2644
- - 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⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2468
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2300
- - 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:1736
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" os get Caption
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:848
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" computersystem get totalphysicalmemory
    3⤵
    PID:1216
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    PID:2968
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:2072
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic" path win32_VideoController get name
    3⤵
    - Detects videocard installed
    PID:2208
- - C:\Windows\system32\cmd.exe
    "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\explorer.exe" && pause
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:604
  - - C:\Windows\system32\PING.EXE
      ping localhost
      4⤵
      Runs ping.exe
      PID:2524

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

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

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\Roaming\Microsoft\Windows\Recent\CustomDestinations\E85PFX7T2DE3IMX6DAJL.temp

Filesize
7KB

MD5
dd088b8fcec3ebc16b119dbadb697e2e

SHA1
4a95b95c2a35db175f14075c7618f399fb08d5a1

SHA256
77212759f7ba75d0e35563879baa9468f8737e5bde36d9b5c9e8bb081997fe19

SHA512
3ae396be198a94559c95d58f9a4588fb17d797f78852f31a8e09de0cffcb642f236dc08d76b395a695cd02d224f2a3c226796d2f787d2c1626d17414f9b1ba3b

Download Submit
\Users\Admin\AppData\Local\Temp\explorer.exe

Filesize
230KB

MD5
98cfd3036140486ef4c019dd72f9afa5

SHA1
97e95eff14ede1be7ae411caa11548e66eeb2c29

SHA256
55885b4252672cea3e51bb8726b9b9a2dd93351f9b563e22ebaa223dd3e85e90

SHA512
f4634d6f9725abb47fd2597a82d4b0fbab2d99cb9a0ad95f23313274515b0a17f3efd3344d7b638a3ed292052c9c010f5c812084b92e37cabdbb0e203bf2e9dd

Download Submit
\Users\Admin\AppData\Local\Temp\svchost.exe

Filesize
850KB

MD5
e42d679a626463742b553794dea6f62b

SHA1
789c25a360342fd431dccbf01b831c36aa229317

SHA256
e4a3b0ce536c0996082311077ac65a096d9e6bbf404c6e6a155ecefb32e864c5

SHA512
9ff1ea63334ab8dc3b81edfd572c0e1a7483ac6912255c839aafbba88e0aa19334c2810966384f7998af697dcb9e4ee502cec276a11108c2f0f9510e2aa67279

Download Submit
memory/288-0-0x00000000742FE000-0x00000000742FF000-memory.dmp

Filesize
4KB

Download
memory/288-1-0x00000000009B0000-0x0000000000AD4000-memory.dmp

Filesize
1.1MB

Download
memory/2072-64-0x0000000002890000-0x0000000002898000-memory.dmp

Filesize
32KB

Download
memory/2468-35-0x000000001B610000-0x000000001B8F2000-memory.dmp

Filesize
2.9MB

Download
memory/2468-36-0x0000000002390000-0x0000000002398000-memory.dmp

Filesize
32KB

Download
memory/2644-28-0x000000001B5C0000-0x000000001B8A2000-memory.dmp

Filesize
2.9MB

Download
memory/2644-29-0x0000000001DA0000-0x0000000001DA8000-memory.dmp

Filesize
32KB

Download
memory/2720-19-0x00000000000B0000-0x00000000000F0000-memory.dmp

Filesize
256KB

Download