umbral | c22c863186e9e86a07cdb7f214c4acede216405a09d4032a603e64931f6966e6

General

Target

8f77f8b13b914f358059e3f7b9ddab70_NeikiAnalytics.exe
Size

139KB
MD5

8f77f8b13b914f358059e3f7b9ddab70
SHA1

d406a28486b4dd881c454e526e149b98c0ec8462
SHA256

c22c863186e9e86a07cdb7f214c4acede216405a09d4032a603e64931f6966e6
SHA512

b00ba88d36203e389021672b39839a172b58e492bb71afb33c9f53b9ba406a0cf5d61cb5bfe6f11dc40529be8424690737ce178d7dd4981b120ec4694f51abad
SSDEEP

3072:bNmWFIDmBFlT1wnCMjIM8pec/dAnXQdnbeFa7cMjGvA/v2QmZ6OGmfx7jHJm:b06BwnRlcCXUhcdv2uN5

Score

10^/10

umbral xworm execution persistence rat stealer trojan

Malware Config

Extracted

Family

xworm

C2

answer-riverside.gl.at.ply.gg:45691

Attributes

Install_directory
%AppData%
install_file
svhost.exe

Extracted

Family

umbral

C2

https://discordapp.com/api/webhooks/1239665745831530598/iJT0OELt4O4igXW_VMu-CUIfcqaawXLhyC4Bruuv1t2x0XOvC0_p9dc-G_RxJMO7fn-V

Signatures

Detect Umbral payload 2 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\RustCheat.exe	family_umbral
behavioral1/memory/2604-14-0x0000000000120000-0x0000000000160000-memory.dmp	family_umbral

Detect Xworm Payload 3 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\XClient.exe	family_xworm
behavioral1/memory/2672-16-0x0000000000010000-0x0000000000026000-memory.dmp	family_xworm
behavioral1/memory/588-48-0x0000000000EF0000-0x0000000000F06000-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

Processes:

powershell.exepowershell.exepowershell.exepowershell.exe

pid process

1992 powershell.exe
2840 powershell.exe
1852 powershell.exe
1040 powershell.exe

pid	process
1992	powershell.exe
2840	powershell.exe
1852	powershell.exe
1040	powershell.exe

Drops startup file 2 IoCs

Processes:

XClient.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svhost.lnk	XClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svhost.lnk	XClient.exe

Executes dropped EXE 4 IoCs

Processes:

XClient.exeRustCheat.exesvhost.exesvhost.exe

pid process

2672 XClient.exe
2604 RustCheat.exe
588 svhost.exe
692 svhost.exe

pid	process
2672	XClient.exe
2604	RustCheat.exe
588	svhost.exe
692	svhost.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

XClient.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Windows\CurrentVersion\Run\svhost = "C:\\Users\\Admin\\AppData\\Roaming\\svhost.exe"	XClient.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.

Processes:

flow ioc

4 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

Processes:

schtasks.exe

pid process

3016 schtasks.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

powershell.exepowershell.exepowershell.exepowershell.exe

pid process

1992 powershell.exe
2840 powershell.exe
1852 powershell.exe
1040 powershell.exe

flow	ioc
4	ip-api.com

pid	process
3016	schtasks.exe

pid	process
1992	powershell.exe
2840	powershell.exe
1852	powershell.exe
1040	powershell.exe

Suspicious use of AdjustPrivilegeToken 50 IoCs

Processes:

8f77f8b13b914f358059e3f7b9ddab70_NeikiAnalytics.exeXClient.exeRustCheat.exewmic.exepowershell.exepowershell.exepowershell.exepowershell.exesvhost.exesvhost.exe

description	pid	process
Token: SeDebugPrivilege	2088	8f77f8b13b914f358059e3f7b9ddab70_NeikiAnalytics.exe
Token: SeDebugPrivilege	2672	XClient.exe
Token: SeDebugPrivilege	2604	RustCheat.exe
Token: SeIncreaseQuotaPrivilege	2520	wmic.exe
Token: SeSecurityPrivilege	2520	wmic.exe
Token: SeTakeOwnershipPrivilege	2520	wmic.exe
Token: SeLoadDriverPrivilege	2520	wmic.exe
Token: SeSystemProfilePrivilege	2520	wmic.exe
Token: SeSystemtimePrivilege	2520	wmic.exe
Token: SeProfSingleProcessPrivilege	2520	wmic.exe
Token: SeIncBasePriorityPrivilege	2520	wmic.exe
Token: SeCreatePagefilePrivilege	2520	wmic.exe
Token: SeBackupPrivilege	2520	wmic.exe
Token: SeRestorePrivilege	2520	wmic.exe
Token: SeShutdownPrivilege	2520	wmic.exe
Token: SeDebugPrivilege	2520	wmic.exe
Token: SeSystemEnvironmentPrivilege	2520	wmic.exe
Token: SeRemoteShutdownPrivilege	2520	wmic.exe
Token: SeUndockPrivilege	2520	wmic.exe
Token: SeManageVolumePrivilege	2520	wmic.exe
Token: 33	2520	wmic.exe
Token: 34	2520	wmic.exe
Token: 35	2520	wmic.exe
Token: SeIncreaseQuotaPrivilege	2520	wmic.exe
Token: SeSecurityPrivilege	2520	wmic.exe
Token: SeTakeOwnershipPrivilege	2520	wmic.exe
Token: SeLoadDriverPrivilege	2520	wmic.exe
Token: SeSystemProfilePrivilege	2520	wmic.exe
Token: SeSystemtimePrivilege	2520	wmic.exe
Token: SeProfSingleProcessPrivilege	2520	wmic.exe
Token: SeIncBasePriorityPrivilege	2520	wmic.exe
Token: SeCreatePagefilePrivilege	2520	wmic.exe
Token: SeBackupPrivilege	2520	wmic.exe
Token: SeRestorePrivilege	2520	wmic.exe
Token: SeShutdownPrivilege	2520	wmic.exe
Token: SeDebugPrivilege	2520	wmic.exe
Token: SeSystemEnvironmentPrivilege	2520	wmic.exe
Token: SeRemoteShutdownPrivilege	2520	wmic.exe
Token: SeUndockPrivilege	2520	wmic.exe
Token: SeManageVolumePrivilege	2520	wmic.exe
Token: 33	2520	wmic.exe
Token: 34	2520	wmic.exe
Token: 35	2520	wmic.exe
Token: SeDebugPrivilege	1992	powershell.exe
Token: SeDebugPrivilege	2840	powershell.exe
Token: SeDebugPrivilege	1852	powershell.exe
Token: SeDebugPrivilege	1040	powershell.exe
Token: SeDebugPrivilege	2672	XClient.exe
Token: SeDebugPrivilege	588	svhost.exe
Token: SeDebugPrivilege	692	svhost.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

8f77f8b13b914f358059e3f7b9ddab70_NeikiAnalytics.exeRustCheat.exeXClient.exetaskeng.exe

description	pid	process	target process
PID 2088 wrote to memory of 2672	2088	8f77f8b13b914f358059e3f7b9ddab70_NeikiAnalytics.exe	XClient.exe
PID 2088 wrote to memory of 2672	2088	8f77f8b13b914f358059e3f7b9ddab70_NeikiAnalytics.exe	XClient.exe
PID 2088 wrote to memory of 2672	2088	8f77f8b13b914f358059e3f7b9ddab70_NeikiAnalytics.exe	XClient.exe
PID 2088 wrote to memory of 2604	2088	8f77f8b13b914f358059e3f7b9ddab70_NeikiAnalytics.exe	RustCheat.exe
PID 2088 wrote to memory of 2604	2088	8f77f8b13b914f358059e3f7b9ddab70_NeikiAnalytics.exe	RustCheat.exe
PID 2088 wrote to memory of 2604	2088	8f77f8b13b914f358059e3f7b9ddab70_NeikiAnalytics.exe	RustCheat.exe
PID 2604 wrote to memory of 2520	2604	RustCheat.exe	wmic.exe
PID 2604 wrote to memory of 2520	2604	RustCheat.exe	wmic.exe
PID 2604 wrote to memory of 2520	2604	RustCheat.exe	wmic.exe
PID 2672 wrote to memory of 1992	2672	XClient.exe	powershell.exe
PID 2672 wrote to memory of 1992	2672	XClient.exe	powershell.exe
PID 2672 wrote to memory of 1992	2672	XClient.exe	powershell.exe
PID 2672 wrote to memory of 2840	2672	XClient.exe	powershell.exe
PID 2672 wrote to memory of 2840	2672	XClient.exe	powershell.exe
PID 2672 wrote to memory of 2840	2672	XClient.exe	powershell.exe
PID 2672 wrote to memory of 1852	2672	XClient.exe	powershell.exe
PID 2672 wrote to memory of 1852	2672	XClient.exe	powershell.exe
PID 2672 wrote to memory of 1852	2672	XClient.exe	powershell.exe
PID 2672 wrote to memory of 1040	2672	XClient.exe	powershell.exe
PID 2672 wrote to memory of 1040	2672	XClient.exe	powershell.exe
PID 2672 wrote to memory of 1040	2672	XClient.exe	powershell.exe
PID 2672 wrote to memory of 3016	2672	XClient.exe	schtasks.exe
PID 2672 wrote to memory of 3016	2672	XClient.exe	schtasks.exe
PID 2672 wrote to memory of 3016	2672	XClient.exe	schtasks.exe
PID 2876 wrote to memory of 588	2876	taskeng.exe	svhost.exe
PID 2876 wrote to memory of 588	2876	taskeng.exe	svhost.exe
PID 2876 wrote to memory of 588	2876	taskeng.exe	svhost.exe
PID 2876 wrote to memory of 692	2876	taskeng.exe	svhost.exe
PID 2876 wrote to memory of 692	2876	taskeng.exe	svhost.exe
PID 2876 wrote to memory of 692	2876	taskeng.exe	svhost.exe

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\8f77f8b13b914f358059e3f7b9ddab70_NeikiAnalytics.exe
"C:\Users\Admin\AppData\Local\Temp\8f77f8b13b914f358059e3f7b9ddab70_NeikiAnalytics.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2088

C:\Users\Admin\AppData\Local\Temp\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
2⤵
- Drops startup file
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2672

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\XClient.exe'
3⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1992

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
3⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2840

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\Roaming\svhost.exe'
3⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1852

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svhost.exe'
3⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1040

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svhost" /tr "C:\Users\Admin\AppData\Roaming\svhost.exe"
3⤵
- Creates scheduled task(s)
PID:3016

C:\Users\Admin\AppData\Local\Temp\RustCheat.exe
"C:\Users\Admin\AppData\Local\Temp\RustCheat.exe"
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2604

C:\Windows\System32\Wbem\wmic.exe
"wmic.exe" csproduct get uuid
3⤵
- Suspicious use of AdjustPrivilegeToken
PID:2520

C:\Windows\system32\taskeng.exe
taskeng.exe {6901E169-5888-462F-AA3A-559178FA3957} S-1-5-21-1298544033-3225604241-2703760938-1000:IZKCKOTP\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2876

C:\Users\Admin\AppData\Roaming\svhost.exe
C:\Users\Admin\AppData\Roaming\svhost.exe
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:588

C:\Users\Admin\AppData\Roaming\svhost.exe
C:\Users\Admin\AppData\Roaming\svhost.exe
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:692

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

Scheduled Task/Job

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\RustCheat.exe
Filesize
231KB

MD5
ff8f5c2670894f74456e534b34d6a8fe

SHA1
e0b35ae06f68adf07e4616da8e91bb1f935e492a

SHA256
d9f3baf81271c395f4dc10e21d12bc2bfb875a8a28ede54abd54a0d8de194d37

SHA512
a58b08c3209bc196f914a82ca2b91a096988831bc45babb22ec2210303050cf03923ebf93e7a58926b8813328c672bec015cd0772f27a0192c661d83e796ffff

Download Submit
C:\Users\Admin\AppData\Local\Temp\XClient.exe
Filesize
60KB

MD5
28ff989c1d462f567aabb9c5ba76456b

SHA1
24be926b14f64f6a9f5b8248d1618bae9a7fc0b2

SHA256
a02fb0b588d89b4ea7f83fc303af6ab00b5ec81a39cf79b2e6ec65d3a3e4c63d

SHA512
2e639e5b5480c93c7605480de40e325c0692d3834f305d7d739f3569707e01cbd5d4c75c5fe4b02616edbb5c72b5f9df6466864a2b11fc862b35b5566d51bcba

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms
Filesize
7KB

MD5
ca08f56e644cc44481c0b242dcbde5e1

SHA1
01282bf5bec15269e2b9671d64a27b359cf8c78f

SHA256
d9d6dd8dc3b5e2e228032375991e826e0f3e222f71bf202837ae485929e22a3a

SHA512
736e5370e0b425da3b0d5274e56ce145acf12d41a15f7ba62d1b8447f05548ea9bbd85a34f4d97df2894c1187ed6d7c18ccfed6edd3941b9ffcd2b585a87e5e8

Download Submit
memory/588-48-0x0000000000EF0000-0x0000000000F06000-memory.dmp

Filesize
88KB

Download
memory/1992-21-0x000000001B6F0000-0x000000001B9D2000-memory.dmp

Filesize
2.9MB

Download
memory/1992-22-0x0000000002870000-0x0000000002878000-memory.dmp

Filesize
32KB

Download
memory/2088-13-0x000007FEF5710000-0x000007FEF60FC000-memory.dmp

Filesize
9.9MB

Download
memory/2088-0-0x000007FEF5713000-0x000007FEF5714000-memory.dmp

Filesize
4KB

Download
memory/2088-2-0x000007FEF5710000-0x000007FEF60FC000-memory.dmp

Filesize
9.9MB

Download
memory/2088-1-0x0000000001060000-0x000000000108A000-memory.dmp

Filesize
168KB

Download
memory/2604-14-0x0000000000120000-0x0000000000160000-memory.dmp

Filesize
256KB

Download
memory/2672-16-0x0000000000010000-0x0000000000026000-memory.dmp

Filesize
88KB

Download
memory/2672-15-0x000007FEF5710000-0x000007FEF60FC000-memory.dmp

Filesize
9.9MB

Download
memory/2672-44-0x000007FEF5710000-0x000007FEF60FC000-memory.dmp

Filesize
9.9MB

Download
memory/2840-28-0x000000001B710000-0x000000001B9F2000-memory.dmp

Filesize
2.9MB

Download
memory/2840-29-0x0000000002290000-0x0000000002298000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads