umbral | 0f10ed177734b40d0ca45eed258f8c3ca585323e32db8f3cab7387b61de0e679

Analysis

max time kernel
120s
max time network
120s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
14-05-2024 07:01

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General

Target

New_Project_1 (1).exe
Size

486KB
MD5

330f592f3a03c5e2c2ed4593d227f1a8
SHA1

55957a8e8d405569c655923dd9414c4ec6c45a0d
SHA256

0f10ed177734b40d0ca45eed258f8c3ca585323e32db8f3cab7387b61de0e679
SHA512

497f9308a49eb1e9451675f447c5774cbaf267dd77b69e1ab494609feca17a20224ac707e54abcb090ee90e1e8187e9fa681c200bcec97ac1bc36b0ce38d15c2
SSDEEP

12288:cWjF6EjvVYEaZ1hJcSx3ThB6xL3s7H4sn4/OxJrinEXL/sT:p68aZ1hlxlay5HdCuL

Score

10^/10

umbral xworm execution persistence rat stealer trojan

Malware Config

Extracted

Family

umbral

https://discord.com/api/webhooks/1239139511359897700/no9NKxq5Y0T8pWT8XT2sOPqegxvgFUODOTwovbkwjhDGUE5-JgfcJdGO-V3YrtPZiVPB

Extracted

Family

xworm

reference-elliott.gl.at.ply.gg:37420

Attributes

Install_directory
%Userprofile%
install_file
svchost.exe

Signatures

Detect Umbral payload 3 IoCs

resource	yara_rule
behavioral1/memory/1676-0-0x0000000000400000-0x000000000047C000-memory.dmp	family_umbral
behavioral1/files/0x0037000000016c26-9.dat	family_umbral
behavioral1/memory/2248-14-0x0000000001020000-0x0000000001060000-memory.dmp	family_umbral

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral1/memory/1676-0-0x0000000000400000-0x000000000047C000-memory.dmp	family_xworm
behavioral1/files/0x000b000000014319-3.dat	family_xworm
behavioral1/memory/2124-15-0x0000000000FF0000-0x000000000100C000-memory.dmp	family_xworm
behavioral1/memory/2972-49-0x0000000000F80000-0x0000000000F9C000-memory.dmp	family_xworm

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral
Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm

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
2012	powershell.exe
2852	powershell.exe
2164	powershell.exe
1052	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	1.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	1.exe

Executes dropped EXE 3 IoCs

pid	Process
2124	1.exe
2248	2.exe
2972	svchost.exe

Loads dropped DLL 2 IoCs

pid	Process
1676	New_Project_1 (1).exe
1676	New_Project_1 (1).exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\svchost.exe"	1.exe

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
7	ip-api.com

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
808	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1320	timeout.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2012	powershell.exe
2852	powershell.exe
2164	powershell.exe
1052	powershell.exe
2124	1.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	2124	1.exe
Token: SeDebugPrivilege	2248	2.exe
Token: SeIncreaseQuotaPrivilege	2504	wmic.exe
Token: SeSecurityPrivilege	2504	wmic.exe
Token: SeTakeOwnershipPrivilege	2504	wmic.exe
Token: SeLoadDriverPrivilege	2504	wmic.exe
Token: SeSystemProfilePrivilege	2504	wmic.exe
Token: SeSystemtimePrivilege	2504	wmic.exe
Token: SeProfSingleProcessPrivilege	2504	wmic.exe
Token: SeIncBasePriorityPrivilege	2504	wmic.exe
Token: SeCreatePagefilePrivilege	2504	wmic.exe
Token: SeBackupPrivilege	2504	wmic.exe
Token: SeRestorePrivilege	2504	wmic.exe
Token: SeShutdownPrivilege	2504	wmic.exe
Token: SeDebugPrivilege	2504	wmic.exe
Token: SeSystemEnvironmentPrivilege	2504	wmic.exe
Token: SeRemoteShutdownPrivilege	2504	wmic.exe
Token: SeUndockPrivilege	2504	wmic.exe
Token: SeManageVolumePrivilege	2504	wmic.exe
Token: 33	2504	wmic.exe
Token: 34	2504	wmic.exe
Token: 35	2504	wmic.exe
Token: SeIncreaseQuotaPrivilege	2504	wmic.exe
Token: SeSecurityPrivilege	2504	wmic.exe
Token: SeTakeOwnershipPrivilege	2504	wmic.exe
Token: SeLoadDriverPrivilege	2504	wmic.exe
Token: SeSystemProfilePrivilege	2504	wmic.exe
Token: SeSystemtimePrivilege	2504	wmic.exe
Token: SeProfSingleProcessPrivilege	2504	wmic.exe
Token: SeIncBasePriorityPrivilege	2504	wmic.exe
Token: SeCreatePagefilePrivilege	2504	wmic.exe
Token: SeBackupPrivilege	2504	wmic.exe
Token: SeRestorePrivilege	2504	wmic.exe
Token: SeShutdownPrivilege	2504	wmic.exe
Token: SeDebugPrivilege	2504	wmic.exe
Token: SeSystemEnvironmentPrivilege	2504	wmic.exe
Token: SeRemoteShutdownPrivilege	2504	wmic.exe
Token: SeUndockPrivilege	2504	wmic.exe
Token: SeManageVolumePrivilege	2504	wmic.exe
Token: 33	2504	wmic.exe
Token: 34	2504	wmic.exe
Token: 35	2504	wmic.exe
Token: SeDebugPrivilege	2012	powershell.exe
Token: SeDebugPrivilege	2852	powershell.exe
Token: SeDebugPrivilege	2164	powershell.exe
Token: SeDebugPrivilege	1052	powershell.exe
Token: SeDebugPrivilege	2124	1.exe
Token: SeDebugPrivilege	2972	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2124	1.exe

Suspicious use of WriteProcessMemory 38 IoCs

description	pid	Process	procid_target
PID 1676 wrote to memory of 2124	1676	New_Project_1 (1).exe	28
PID 1676 wrote to memory of 2124	1676	New_Project_1 (1).exe	28
PID 1676 wrote to memory of 2124	1676	New_Project_1 (1).exe	28
PID 1676 wrote to memory of 2124	1676	New_Project_1 (1).exe	28
PID 1676 wrote to memory of 2248	1676	New_Project_1 (1).exe	29
PID 1676 wrote to memory of 2248	1676	New_Project_1 (1).exe	29
PID 1676 wrote to memory of 2248	1676	New_Project_1 (1).exe	29
PID 1676 wrote to memory of 2248	1676	New_Project_1 (1).exe	29
PID 2248 wrote to memory of 2504	2248	2.exe	30
PID 2248 wrote to memory of 2504	2248	2.exe	30
PID 2248 wrote to memory of 2504	2248	2.exe	30
PID 2124 wrote to memory of 2012	2124	1.exe	33
PID 2124 wrote to memory of 2012	2124	1.exe	33
PID 2124 wrote to memory of 2012	2124	1.exe	33
PID 2124 wrote to memory of 2852	2124	1.exe	35
PID 2124 wrote to memory of 2852	2124	1.exe	35
PID 2124 wrote to memory of 2852	2124	1.exe	35
PID 2124 wrote to memory of 2164	2124	1.exe	37
PID 2124 wrote to memory of 2164	2124	1.exe	37
PID 2124 wrote to memory of 2164	2124	1.exe	37
PID 2124 wrote to memory of 1052	2124	1.exe	39
PID 2124 wrote to memory of 1052	2124	1.exe	39
PID 2124 wrote to memory of 1052	2124	1.exe	39
PID 2124 wrote to memory of 808	2124	1.exe	41
PID 2124 wrote to memory of 808	2124	1.exe	41
PID 2124 wrote to memory of 808	2124	1.exe	41
PID 1364 wrote to memory of 2972	1364	taskeng.exe	46
PID 1364 wrote to memory of 2972	1364	taskeng.exe	46
PID 1364 wrote to memory of 2972	1364	taskeng.exe	46
PID 2124 wrote to memory of 1580	2124	1.exe	47
PID 2124 wrote to memory of 1580	2124	1.exe	47
PID 2124 wrote to memory of 1580	2124	1.exe	47
PID 2124 wrote to memory of 2016	2124	1.exe	49
PID 2124 wrote to memory of 2016	2124	1.exe	49
PID 2124 wrote to memory of 2016	2124	1.exe	49
PID 2016 wrote to memory of 1320	2016	cmd.exe	51
PID 2016 wrote to memory of 1320	2016	cmd.exe	51
PID 2016 wrote to memory of 1320	2016	cmd.exe	51

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\New_Project_1 (1).exe
"C:\Users\Admin\AppData\Local\Temp\New_Project_1 (1).exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1676
- C:\Users\Admin\AppData\Local\Temp\1.exe
  "C:\Users\Admin\AppData\Local\Temp\1.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2124
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\1.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2012
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '1.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2852
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\svchost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2164
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1052
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\Users\Admin\svchost.exe"
    3⤵
    - Creates scheduled task(s)
    PID:808
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /delete /f /tn "svchost"
    3⤵
    PID:1580
- - C:\Windows\system32\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp6F66.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2016
  - - C:\Windows\system32\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:1320
- C:\Users\Admin\AppData\Local\Temp\2.exe
  "C:\Users\Admin\AppData\Local\Temp\2.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2248
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:2504

C:\Windows\system32\taskeng.exe
taskeng.exe {6BCFFA53-1B70-45B1-B168-37A4A60D2579} S-1-5-21-2297530677-1229052932-2803917579-1000:HKULBIBU\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1364
- C:\Users\Admin\svchost.exe
  C:\Users\Admin\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2972

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp6F66.tmp.bat

Filesize
153B

MD5
6bae8e1deb116c792ec2e21e12e887aa

SHA1
d60105868af4588911948c9445f93ba8c161076a

SHA256
21a47b7371a86a5cb22aa94f6951e1881e3eb6cac6259eaf35e50cd7438b50fb

SHA512
677ca3880a23a7e5bcbe68d2f2204743778001a97e3c32bbdf0e2253baac10c66b6628824ec7ee9be4e86f019c99f36477f82bcfe8cc96ce76e35cdb52d1261b

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

Filesize
7KB

MD5
6a6ae108516db7ab755ca89a7540ae6e

SHA1
194304aacc11568edb1e2c587b515db7acde2f1a

SHA256
567fc7e9fbb01e61027f5340becfdfa209584b2457a39de92ca30ec0a65d7a35

SHA512
0d2b140a72ca9ce892b67755eb5e2ea73c0a54afaf85eeac8518cacbc38e605fea731e1cf525346daee6a0683749337dfaa52273f7ce8bb6c8d1330edc96f4bf

Download Submit
\Users\Admin\AppData\Local\Temp\1.exe

Filesize
88KB

MD5
4e4ffd6981f1d7df1e06e02c7a52e86a

SHA1
970d227a122a826f587fb49c694a422ec6aff1e0

SHA256
353010e5cbdfb234aadfcb40b517b51b24bbac81b64d794d5d8f8b1cd0cd6031

SHA512
1f75401fe015416453119bb92ea46c71412f342fe4bf1170bc2655a1c4f1fb4344bdff64df8dfd54f8203b30445225a70f12790432d3b59693e96de2fa5750ec

Download Submit
\Users\Admin\AppData\Local\Temp\2.exe

Filesize
230KB

MD5
8068d967a754039c953d677ed75caa65

SHA1
c6ca62d0e3f84f4018546cdf40b14ac80b06af95

SHA256
b2811334ba1ec945f7f2f1b1976e72dd634a4cf8b5679ceb4c90816d5b646b11

SHA512
8f8f9b0c50f3178daa1df6ce16755c7a0de24872a344fe6b93d1a9b11cfad2faa1ed5ad58c6ac9904b889188d8efaba2d51e4240e7a813fffe6878ec8970954c

Download Submit
memory/1676-0-0x0000000000400000-0x000000000047C000-memory.dmp

Filesize
496KB

Download
memory/2012-21-0x000000001B7E0000-0x000000001BAC2000-memory.dmp

Filesize
2.9MB

Download
memory/2012-22-0x0000000001D80000-0x0000000001D88000-memory.dmp

Filesize
32KB

Download
memory/2124-15-0x0000000000FF0000-0x000000000100C000-memory.dmp

Filesize
112KB

Download
memory/2248-14-0x0000000001020000-0x0000000001060000-memory.dmp

Filesize
256KB

Download
memory/2852-28-0x000000001B500000-0x000000001B7E2000-memory.dmp

Filesize
2.9MB

Download
memory/2852-29-0x00000000026A0000-0x00000000026A8000-memory.dmp

Filesize
32KB

Download
memory/2972-49-0x0000000000F80000-0x0000000000F9C000-memory.dmp

Filesize
112KB

Download