umbral | 9e8d3fe195a8bcf9433fe687cc5a4679743839b17b6223cb15f96dbc0763eef5

Analysis

max time kernel
20s
max time network
24s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
12-11-2024 11:04

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General

Target

AIMWARE_Loader_setup.exe
Size

144KB
MD5

4354d409b21d4c11707d204e67f640f5
SHA1

4c5a70526de5527ae0c2ab089590813ddb2cbae9
SHA256

9e8d3fe195a8bcf9433fe687cc5a4679743839b17b6223cb15f96dbc0763eef5
SHA512

dac9993f3497ec680a17eb6ccc40d876a5814f3f6f09112079a0521d8fb7c76b2f2b6383314c40f3e92eab847363ad301287c9c789d4500fb5891ab98dc75a81
SSDEEP

3072:SFEAbUdAIjonLoL/R6wZ5Oyssuz//C0zrh9L0A:YEACki6fyG60Hh9L

Score

10^/10

umbral xworm execution persistence rat stealer trojan

Malware Config

Extracted

Family

umbral

https://discord.com/api/webhooks/1305582300918185994/EE8PFtpBm_iHizpV_Q_Kn5DP9px4rFVu_tjpCIZQ5EdlmytBIKpakzf4xxE22pXS9U1K

Extracted

Family

xworm

127.0.0.1:4395

19.ip.gl.ply.gg:4395

Attributes

Install_directory
%Public%
install_file
Windows Security Host.exe

Signatures

Detect Umbral payload 2 IoCs

resource	yara_rule
behavioral1/files/0x002800000004505f-30.dat	family_umbral
behavioral1/memory/3544-32-0x0000026802B80000-0x0000026802BC0000-memory.dmp	family_umbral

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/files/0x002800000004505e-6.dat	family_xworm
behavioral1/memory/3040-34-0x0000000000840000-0x000000000085A000-memory.dmp	family_xworm

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral
Umbral family
umbral
Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
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
1496	powershell.exe
1104	powershell.exe
1000	powershell.exe
4976	powershell.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-87863914-780023816-688321450-1000\Control Panel\International\Geo\Nation	AIMWARE_Loader_setup.exe
Key value queried	\REGISTRY\USER\S-1-5-21-87863914-780023816-688321450-1000\Control Panel\International\Geo\Nation	External.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
3040	External.exe
3544	external..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-1-5-21-87863914-780023816-688321450-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Security Host = "C:\\Users\\Public\\Windows Security Host.exe"	External.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
20	ip-api.com

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 13 IoCs

pid	Process
4416	wmic.exe
4416	wmic.exe
4416	wmic.exe
4416	wmic.exe
1496	powershell.exe
1496	powershell.exe
1104	powershell.exe
1104	powershell.exe
1000	powershell.exe
1000	powershell.exe
4976	powershell.exe
4976	powershell.exe
3040	External.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3040	External.exe
Token: SeDebugPrivilege	3544	external..exe
Token: SeIncreaseQuotaPrivilege	4416	wmic.exe
Token: SeSecurityPrivilege	4416	wmic.exe
Token: SeTakeOwnershipPrivilege	4416	wmic.exe
Token: SeLoadDriverPrivilege	4416	wmic.exe
Token: SeSystemProfilePrivilege	4416	wmic.exe
Token: SeSystemtimePrivilege	4416	wmic.exe
Token: SeProfSingleProcessPrivilege	4416	wmic.exe
Token: SeIncBasePriorityPrivilege	4416	wmic.exe
Token: SeCreatePagefilePrivilege	4416	wmic.exe
Token: SeBackupPrivilege	4416	wmic.exe
Token: SeRestorePrivilege	4416	wmic.exe
Token: SeShutdownPrivilege	4416	wmic.exe
Token: SeDebugPrivilege	4416	wmic.exe
Token: SeSystemEnvironmentPrivilege	4416	wmic.exe
Token: SeRemoteShutdownPrivilege	4416	wmic.exe
Token: SeUndockPrivilege	4416	wmic.exe
Token: SeManageVolumePrivilege	4416	wmic.exe
Token: 33	4416	wmic.exe
Token: 34	4416	wmic.exe
Token: 35	4416	wmic.exe
Token: 36	4416	wmic.exe
Token: SeIncreaseQuotaPrivilege	4416	wmic.exe
Token: SeSecurityPrivilege	4416	wmic.exe
Token: SeTakeOwnershipPrivilege	4416	wmic.exe
Token: SeLoadDriverPrivilege	4416	wmic.exe
Token: SeSystemProfilePrivilege	4416	wmic.exe
Token: SeSystemtimePrivilege	4416	wmic.exe
Token: SeProfSingleProcessPrivilege	4416	wmic.exe
Token: SeIncBasePriorityPrivilege	4416	wmic.exe
Token: SeCreatePagefilePrivilege	4416	wmic.exe
Token: SeBackupPrivilege	4416	wmic.exe
Token: SeRestorePrivilege	4416	wmic.exe
Token: SeShutdownPrivilege	4416	wmic.exe
Token: SeDebugPrivilege	4416	wmic.exe
Token: SeSystemEnvironmentPrivilege	4416	wmic.exe
Token: SeRemoteShutdownPrivilege	4416	wmic.exe
Token: SeUndockPrivilege	4416	wmic.exe
Token: SeManageVolumePrivilege	4416	wmic.exe
Token: 33	4416	wmic.exe
Token: 34	4416	wmic.exe
Token: 35	4416	wmic.exe
Token: 36	4416	wmic.exe
Token: SeDebugPrivilege	1496	powershell.exe
Token: SeIncreaseQuotaPrivilege	1496	powershell.exe
Token: SeSecurityPrivilege	1496	powershell.exe
Token: SeTakeOwnershipPrivilege	1496	powershell.exe
Token: SeLoadDriverPrivilege	1496	powershell.exe
Token: SeSystemProfilePrivilege	1496	powershell.exe
Token: SeSystemtimePrivilege	1496	powershell.exe
Token: SeProfSingleProcessPrivilege	1496	powershell.exe
Token: SeIncBasePriorityPrivilege	1496	powershell.exe
Token: SeCreatePagefilePrivilege	1496	powershell.exe
Token: SeBackupPrivilege	1496	powershell.exe
Token: SeRestorePrivilege	1496	powershell.exe
Token: SeShutdownPrivilege	1496	powershell.exe
Token: SeDebugPrivilege	1496	powershell.exe
Token: SeSystemEnvironmentPrivilege	1496	powershell.exe
Token: SeRemoteShutdownPrivilege	1496	powershell.exe
Token: SeUndockPrivilege	1496	powershell.exe
Token: SeManageVolumePrivilege	1496	powershell.exe
Token: 33	1496	powershell.exe
Token: 34	1496	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3040	External.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4528 wrote to memory of 3040	4528	AIMWARE_Loader_setup.exe	82
PID 4528 wrote to memory of 3040	4528	AIMWARE_Loader_setup.exe	82
PID 4528 wrote to memory of 3544	4528	AIMWARE_Loader_setup.exe	83
PID 4528 wrote to memory of 3544	4528	AIMWARE_Loader_setup.exe	83
PID 3544 wrote to memory of 4416	3544	external..exe	86
PID 3544 wrote to memory of 4416	3544	external..exe	86
PID 3040 wrote to memory of 1496	3040	External.exe	90
PID 3040 wrote to memory of 1496	3040	External.exe	90
PID 3040 wrote to memory of 1104	3040	External.exe	93
PID 3040 wrote to memory of 1104	3040	External.exe	93
PID 3040 wrote to memory of 1000	3040	External.exe	96
PID 3040 wrote to memory of 1000	3040	External.exe	96
PID 3040 wrote to memory of 4976	3040	External.exe	98
PID 3040 wrote to memory of 4976	3040	External.exe	98

C:\Users\Admin\AppData\Local\Temp\AIMWARE_Loader_setup.exe
"C:\Users\Admin\AppData\Local\Temp\AIMWARE_Loader_setup.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4528
- C:\Users\Admin\AppData\Local\Temp\External.exe
  "C:\Users\Admin\AppData\Local\Temp\External.exe"
  2⤵
  - Checks computer location settings
  - 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:3040
- - 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\External.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1496
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'External.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    PID:1104
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Public\Windows Security Host.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    PID:1000
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Windows Security Host.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    PID:4976
- C:\Users\Admin\AppData\Local\Temp\external..exe
  "C:\Users\Admin\AppData\Local\Temp\external..exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3544
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4416

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

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\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
3KB

MD5
3eb3833f769dd890afc295b977eab4b4

SHA1
e857649b037939602c72ad003e5d3698695f436f

SHA256
c485a6e2fd17c342fca60060f47d6a5655a65a412e35e001bb5bf88d96e6e485

SHA512
c24bbc8f278478d43756807b8c584d4e3fb2289db468bc92986a489f74a8da386a667a758360a397e77e018e363be8912ac260072fa3e31117ad0599ac749e72

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
c67441dfa09f61bca500bb43407c56b8

SHA1
5a56cf7cbeb48c109e2128c31b681fac3959157b

SHA256
63082da456c124d0bc516d2161d1613db5f3008d903e4066d2c7b4e90b435f33

SHA512
325de8b718b3a01df05e20e028c5882240e5fd2e96c771361b776312923ff178f27494a1f5249bf6d7365a99155eb8735a51366e85597008e6a10462e63ee0e8

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
a9fd9cc8c481050e25d7fb3f396061d2

SHA1
507e0cc85c6dbdfcf2f7210bab9eed4bd4f3f6b7

SHA256
7fcb7276492be3e41ae018478827c119f246106027254cdabb69d6f2c1263b9a

SHA512
9df048d0de8455f311e8d00c44a1c4495f63bddb2e16ab765dcc7e5aaa8de8cec7916037092d76f0d1529124de80ad27ae81b58123b46c45bf3d082beae08a9a

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
5dc0bf06113f867ab9be36428acea530

SHA1
bd73ca9bf3e5edc80370f4bc79eb403772440105

SHA256
d8e861ab4e7c40d5ccae45c056a72219decadc6061a0020cae2dfec8dc55e4ae

SHA512
e92b837a30d55b7d0f38aafc3a9403d77f2672b1de2113ba1926c7e84c89248813b50f942cbb72a166819f773b8ac4ba40d5a3329e1a815a2f833234b5a1d98d

Download Submit
C:\Users\Admin\AppData\Local\Temp\External.exe

Filesize
75KB

MD5
39d8e45da8df6b6851325eabc33ee271

SHA1
9e89a782ade2fbe7d8aa59f320ed2839ce82adda

SHA256
4b70d7f5c8f2a44af63a51bbbc5f5d1a9baf6c2924d4dcb4f7493136dca1308a

SHA512
4b3dbae3fdf62b606cba037e91da2f7f66190218ebd360925bc8e6717cb4f4133dd6ab812df5c6ac832fef5ad3804f5b60b85f8074547dbdb72ca1941246d4fe

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_35o5kj1d.tz0.psm1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\external..exe

Filesize
227KB

MD5
14710332a8810ef47ae406bdc38ba850

SHA1
fbffc8889614801b02ccd2ee6b0e89157fe45991

SHA256
e85ae204806791461c04de5d19ff512bbd2d3663ebaa0ebe3a9ae5b1faf99407

SHA512
6260ca6c6fd3baa92a86cd5ce0901efa06f2690ed98e0086a126a07d102b2810b192e55c46295805a1e7d261fa3721058ec5c22ba13e60bfa25f28ce6803c22a

Download Submit
memory/1496-41-0x0000020862330000-0x0000020862352000-memory.dmp

Filesize
136KB

Download
memory/3040-34-0x0000000000840000-0x000000000085A000-memory.dmp

Filesize
104KB

Download
memory/3040-35-0x00007FFE2AAA0000-0x00007FFE2B562000-memory.dmp

Filesize
10.8MB

Download
memory/3040-91-0x00007FFE2AAA0000-0x00007FFE2B562000-memory.dmp

Filesize
10.8MB

Download
memory/3544-36-0x00007FFE2AAA0000-0x00007FFE2B562000-memory.dmp

Filesize
10.8MB

Download
memory/3544-40-0x00007FFE2AAA0000-0x00007FFE2B562000-memory.dmp

Filesize
10.8MB

Download
memory/3544-32-0x0000026802B80000-0x0000026802BC0000-memory.dmp

Filesize
256KB

Download
memory/4528-38-0x00007FFE2AAA0000-0x00007FFE2B562000-memory.dmp

Filesize
10.8MB

Download
memory/4528-0-0x00007FFE2AAA3000-0x00007FFE2AAA5000-memory.dmp

Filesize
8KB

Download
memory/4528-13-0x00007FFE2AAA0000-0x00007FFE2B562000-memory.dmp

Filesize
10.8MB

Download
memory/4528-1-0x0000000000DE0000-0x0000000000E08000-memory.dmp

Filesize
160KB

Download