umbral | 9e8d3fe195a8bcf9433fe687cc5a4679743839b17b6223cb15f96dbc0763eef5

Analysis

max time kernel
17s
max time network
26s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-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

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
behavioral2/files/0x001c00000002aaec-18.dat	family_umbral
behavioral2/memory/1124-27-0x00000248EC970000-0x00000248EC9B0000-memory.dmp	family_umbral

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x001b00000002aae0-6.dat	family_xworm
behavioral2/memory/3664-29-0x0000000000970000-0x000000000098A000-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
4032	powershell.exe
1884	powershell.exe
4648	powershell.exe
908	powershell.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
3664	External.exe
1124	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-1-5-21-3587106988-279496464-3440778474-1000\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
1	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 9 IoCs

pid	Process
4032	powershell.exe
4032	powershell.exe
1884	powershell.exe
1884	powershell.exe
4648	powershell.exe
4648	powershell.exe
908	powershell.exe
908	powershell.exe
3664	External.exe

Suspicious use of AdjustPrivilegeToken 49 IoCs

description	pid	Process
Token: SeDebugPrivilege	3664	External.exe
Token: SeDebugPrivilege	1124	external..exe
Token: SeIncreaseQuotaPrivilege	4092	wmic.exe
Token: SeSecurityPrivilege	4092	wmic.exe
Token: SeTakeOwnershipPrivilege	4092	wmic.exe
Token: SeLoadDriverPrivilege	4092	wmic.exe
Token: SeSystemProfilePrivilege	4092	wmic.exe
Token: SeSystemtimePrivilege	4092	wmic.exe
Token: SeProfSingleProcessPrivilege	4092	wmic.exe
Token: SeIncBasePriorityPrivilege	4092	wmic.exe
Token: SeCreatePagefilePrivilege	4092	wmic.exe
Token: SeBackupPrivilege	4092	wmic.exe
Token: SeRestorePrivilege	4092	wmic.exe
Token: SeShutdownPrivilege	4092	wmic.exe
Token: SeDebugPrivilege	4092	wmic.exe
Token: SeSystemEnvironmentPrivilege	4092	wmic.exe
Token: SeRemoteShutdownPrivilege	4092	wmic.exe
Token: SeUndockPrivilege	4092	wmic.exe
Token: SeManageVolumePrivilege	4092	wmic.exe
Token: 33	4092	wmic.exe
Token: 34	4092	wmic.exe
Token: 35	4092	wmic.exe
Token: 36	4092	wmic.exe
Token: SeIncreaseQuotaPrivilege	4092	wmic.exe
Token: SeSecurityPrivilege	4092	wmic.exe
Token: SeTakeOwnershipPrivilege	4092	wmic.exe
Token: SeLoadDriverPrivilege	4092	wmic.exe
Token: SeSystemProfilePrivilege	4092	wmic.exe
Token: SeSystemtimePrivilege	4092	wmic.exe
Token: SeProfSingleProcessPrivilege	4092	wmic.exe
Token: SeIncBasePriorityPrivilege	4092	wmic.exe
Token: SeCreatePagefilePrivilege	4092	wmic.exe
Token: SeBackupPrivilege	4092	wmic.exe
Token: SeRestorePrivilege	4092	wmic.exe
Token: SeShutdownPrivilege	4092	wmic.exe
Token: SeDebugPrivilege	4092	wmic.exe
Token: SeSystemEnvironmentPrivilege	4092	wmic.exe
Token: SeRemoteShutdownPrivilege	4092	wmic.exe
Token: SeUndockPrivilege	4092	wmic.exe
Token: SeManageVolumePrivilege	4092	wmic.exe
Token: 33	4092	wmic.exe
Token: 34	4092	wmic.exe
Token: 35	4092	wmic.exe
Token: 36	4092	wmic.exe
Token: SeDebugPrivilege	4032	powershell.exe
Token: SeDebugPrivilege	1884	powershell.exe
Token: SeDebugPrivilege	4648	powershell.exe
Token: SeDebugPrivilege	908	powershell.exe
Token: SeDebugPrivilege	3664	External.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3664	External.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2756 wrote to memory of 3664	2756	AIMWARE_Loader_setup.exe	77
PID 2756 wrote to memory of 3664	2756	AIMWARE_Loader_setup.exe	77
PID 2756 wrote to memory of 1124	2756	AIMWARE_Loader_setup.exe	78
PID 2756 wrote to memory of 1124	2756	AIMWARE_Loader_setup.exe	78
PID 1124 wrote to memory of 4092	1124	external..exe	79
PID 1124 wrote to memory of 4092	1124	external..exe	79
PID 3664 wrote to memory of 4032	3664	External.exe	82
PID 3664 wrote to memory of 4032	3664	External.exe	82
PID 3664 wrote to memory of 1884	3664	External.exe	84
PID 3664 wrote to memory of 1884	3664	External.exe	84
PID 3664 wrote to memory of 4648	3664	External.exe	86
PID 3664 wrote to memory of 4648	3664	External.exe	86
PID 3664 wrote to memory of 908	3664	External.exe	88
PID 3664 wrote to memory of 908	3664	External.exe	88

C:\Users\Admin\AppData\Local\Temp\AIMWARE_Loader_setup.exe
"C:\Users\Admin\AppData\Local\Temp\AIMWARE_Loader_setup.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2756
- C:\Users\Admin\AppData\Local\Temp\External.exe
  "C:\Users\Admin\AppData\Local\Temp\External.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:3664
- - 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:4032
- - 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
    - Suspicious use of AdjustPrivilegeToken
    PID:1884
- - 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
    - Suspicious use of AdjustPrivilegeToken
    PID:4648
- - 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
    - Suspicious use of AdjustPrivilegeToken
    PID:908
- 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:1124
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:4092

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

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
2KB

MD5
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

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

Filesize
944B

MD5
1a9fa92a4f2e2ec9e244d43a6a4f8fb9

SHA1
9910190edfaccece1dfcc1d92e357772f5dae8f7

SHA256
0ee052d5333fd5fd86bc84856fec98e045f077a7ac8051651bf7c521b9706888

SHA512
5d2361476fa22200e6f83883efe7dcb8c3fe7dae8d56e04e28a36e9ae1270c327b6aa161d92b239593da7661289d002c574446ecfd6bd19928209aae25e3ef64

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

Filesize
944B

MD5
f8c40f7624e23fa92ae2f41e34cfca77

SHA1
20e742cfe2759ac2adbc16db736a9e143ca7b677

SHA256
c51a52818a084addbfa913d2bb4bb2b0e60c287a4cf98e679f18b8a521c0aa7b

SHA512
f1da3ec61403d788d417d097a7ed2947203c6bff3cf1d35d697c31edecdf04710b3e44b2aa263b886e297b2ce923fea410ccc673261928f1d0cd81252740dbe7

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

Filesize
944B

MD5
21017c68eaf9461301de459f4f07e888

SHA1
41ff30fc8446508d4c3407c79e798cf6eaa5bb73

SHA256
03b321e48ff3328d9c230308914961fe110c4c7bc96c0a85a296745437bcb888

SHA512
956990c11c6c1baa3665ef7ef23ef6073e0a7fcff77a93b5e605a83ff1e60b916d80d45dafb06977aed90868a273569a865cf2c623e295b5157bfff0fb2be35d

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_rre5ofli.y3f.ps1

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/1124-30-0x00007FFE47C30000-0x00007FFE486F2000-memory.dmp

Filesize
10.8MB

Download
memory/1124-34-0x00007FFE47C30000-0x00007FFE486F2000-memory.dmp

Filesize
10.8MB

Download
memory/1124-27-0x00000248EC970000-0x00000248EC9B0000-memory.dmp

Filesize
256KB

Download
memory/2756-0-0x00007FFE47C33000-0x00007FFE47C35000-memory.dmp

Filesize
8KB

Download
memory/2756-32-0x00007FFE47C30000-0x00007FFE486F2000-memory.dmp

Filesize
10.8MB

Download
memory/2756-14-0x00007FFE47C30000-0x00007FFE486F2000-memory.dmp

Filesize
10.8MB

Download
memory/2756-1-0x0000000000A00000-0x0000000000A28000-memory.dmp

Filesize
160KB

Download
memory/3664-29-0x0000000000970000-0x000000000098A000-memory.dmp

Filesize
104KB

Download
memory/3664-28-0x00007FFE47C30000-0x00007FFE486F2000-memory.dmp

Filesize
10.8MB

Download
memory/3664-81-0x00007FFE47C30000-0x00007FFE486F2000-memory.dmp

Filesize
10.8MB

Download
memory/4032-40-0x0000020F332B0000-0x0000020F332D2000-memory.dmp

Filesize
136KB

Download