umbral | dc7f8c7c39bb043da2c19a03504c499e0af367fefee810a8190c1119992e2248

Analysis

max time kernel
147s
max time network
152s
platform
windows11-21h2_x64
resource
win11-20250217-en
resource tags

arch:x64arch:x86image:win11-20250217-enlocale:en-usos:windows11-21h2-x64system
submitted
23-02-2025 10:42

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General

Target

obxod266dev.exe
Size

329KB
MD5

31fc82eeaed45f2389b57ffb9d8f6ea2
SHA1

fd46d4e307b09a372a3bfc0d88b87eeccaf77912
SHA256

dc7f8c7c39bb043da2c19a03504c499e0af367fefee810a8190c1119992e2248
SHA512

418bca3b27a8354e559de8e1333ebc8ff42a5d4f07b42a0ec95775c9a52feb1d61a00006ceefef3be8e30dc07c0fb3123440413a2b16d8d9cc6e468cb9d5c962
SSDEEP

6144:3aDaK7MooumCpZSApAWl2IenY7YDlw+JmS1r8+CMCX:3LK7sk2IKYkp/mYPCX

Score

10^/10

umbral xworm execution persistence rat stealer trojan

Malware Config

Extracted

Family

xworm

25.ip.gl.ply.gg:59054

Attributes

Install_directory
%AppData%
install_file
svchost.exe

Signatures

Detect Umbral payload 2 IoCs

resource	yara_rule
behavioral5/files/0x001c00000002ae52-17.dat	family_umbral
behavioral5/memory/4492-25-0x000001BF48990000-0x000001BF489D0000-memory.dmp	family_umbral

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral5/files/0x00080000000261b3-6.dat	family_xworm
behavioral5/memory/4904-26-0x0000000000600000-0x000000000061A000-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
4908	powershell.exe
3924	powershell.exe
1988	powershell.exe
1300	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	obxod 266dev.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	obxod 266dev.exe

Executes dropped EXE 2 IoCs

pid	Process
4904	obxod 266dev.exe
4492	Umbral.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-1-5-21-2250935964-4080446702-2776729278-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe"	obxod 266dev.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
3924	powershell.exe
3924	powershell.exe
1988	powershell.exe
1988	powershell.exe
1300	powershell.exe
1300	powershell.exe
4908	powershell.exe
4908	powershell.exe
4904	obxod 266dev.exe

Suspicious use of AdjustPrivilegeToken 49 IoCs

description	pid	Process
Token: SeDebugPrivilege	4904	obxod 266dev.exe
Token: SeDebugPrivilege	4492	Umbral.exe
Token: SeIncreaseQuotaPrivilege	4224	wmic.exe
Token: SeSecurityPrivilege	4224	wmic.exe
Token: SeTakeOwnershipPrivilege	4224	wmic.exe
Token: SeLoadDriverPrivilege	4224	wmic.exe
Token: SeSystemProfilePrivilege	4224	wmic.exe
Token: SeSystemtimePrivilege	4224	wmic.exe
Token: SeProfSingleProcessPrivilege	4224	wmic.exe
Token: SeIncBasePriorityPrivilege	4224	wmic.exe
Token: SeCreatePagefilePrivilege	4224	wmic.exe
Token: SeBackupPrivilege	4224	wmic.exe
Token: SeRestorePrivilege	4224	wmic.exe
Token: SeShutdownPrivilege	4224	wmic.exe
Token: SeDebugPrivilege	4224	wmic.exe
Token: SeSystemEnvironmentPrivilege	4224	wmic.exe
Token: SeRemoteShutdownPrivilege	4224	wmic.exe
Token: SeUndockPrivilege	4224	wmic.exe
Token: SeManageVolumePrivilege	4224	wmic.exe
Token: 33	4224	wmic.exe
Token: 34	4224	wmic.exe
Token: 35	4224	wmic.exe
Token: 36	4224	wmic.exe
Token: SeIncreaseQuotaPrivilege	4224	wmic.exe
Token: SeSecurityPrivilege	4224	wmic.exe
Token: SeTakeOwnershipPrivilege	4224	wmic.exe
Token: SeLoadDriverPrivilege	4224	wmic.exe
Token: SeSystemProfilePrivilege	4224	wmic.exe
Token: SeSystemtimePrivilege	4224	wmic.exe
Token: SeProfSingleProcessPrivilege	4224	wmic.exe
Token: SeIncBasePriorityPrivilege	4224	wmic.exe
Token: SeCreatePagefilePrivilege	4224	wmic.exe
Token: SeBackupPrivilege	4224	wmic.exe
Token: SeRestorePrivilege	4224	wmic.exe
Token: SeShutdownPrivilege	4224	wmic.exe
Token: SeDebugPrivilege	4224	wmic.exe
Token: SeSystemEnvironmentPrivilege	4224	wmic.exe
Token: SeRemoteShutdownPrivilege	4224	wmic.exe
Token: SeUndockPrivilege	4224	wmic.exe
Token: SeManageVolumePrivilege	4224	wmic.exe
Token: 33	4224	wmic.exe
Token: 34	4224	wmic.exe
Token: 35	4224	wmic.exe
Token: 36	4224	wmic.exe
Token: SeDebugPrivilege	3924	powershell.exe
Token: SeDebugPrivilege	1988	powershell.exe
Token: SeDebugPrivilege	1300	powershell.exe
Token: SeDebugPrivilege	4908	powershell.exe
Token: SeDebugPrivilege	4904	obxod 266dev.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4904	obxod 266dev.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1180 wrote to memory of 4904	1180	obxod266dev.exe	81
PID 1180 wrote to memory of 4904	1180	obxod266dev.exe	81
PID 1180 wrote to memory of 4492	1180	obxod266dev.exe	82
PID 1180 wrote to memory of 4492	1180	obxod266dev.exe	82
PID 4492 wrote to memory of 4224	4492	Umbral.exe	84
PID 4492 wrote to memory of 4224	4492	Umbral.exe	84
PID 4904 wrote to memory of 3924	4904	obxod 266dev.exe	87
PID 4904 wrote to memory of 3924	4904	obxod 266dev.exe	87
PID 4904 wrote to memory of 1988	4904	obxod 266dev.exe	89
PID 4904 wrote to memory of 1988	4904	obxod 266dev.exe	89
PID 4904 wrote to memory of 1300	4904	obxod 266dev.exe	91
PID 4904 wrote to memory of 1300	4904	obxod 266dev.exe	91
PID 4904 wrote to memory of 4908	4904	obxod 266dev.exe	93
PID 4904 wrote to memory of 4908	4904	obxod 266dev.exe	93

C:\Users\Admin\AppData\Local\Temp\obxod266dev.exe
"C:\Users\Admin\AppData\Local\Temp\obxod266dev.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1180
- C:\Users\Admin\AppData\Roaming\obxod 266dev.exe
  "C:\Users\Admin\AppData\Roaming\obxod 266dev.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:4904
- - 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\obxod 266dev.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3924
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'obxod 266dev.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1988
- - 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\svchost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1300
- - 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:4908
- C:\Users\Admin\AppData\Roaming\Umbral.exe
  "C:\Users\Admin\AppData\Roaming\Umbral.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4492
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:4224

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

Replay Monitor

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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
d0a4a3b9a52b8fe3b019f6cd0ef3dad6

SHA1
fed70ce7834c3b97edbd078eccda1e5effa527cd

SHA256
21942e513f223fdad778348fbb20617dd29f986bccd87824c0ae7f15649f3f31

SHA512
1a66f837b4e7fb6346d0500aeacb44902fb8a239bce23416271263eba46fddae58a17075e188ae43eb516c841e02c87e32ebd73256c7cc2c0713d00c35f1761b

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
6f0e62045515b66d0a0105abc22dbf19

SHA1
894d685122f3f3c9a3457df2f0b12b0e851b394c

SHA256
529811e4d3496c559f3bd92cd877b93b719c3ac4834202aa76ab9e16e25f9319

SHA512
f78426df6032ee77f8c463446ab1c6bb4669ef7a2463dead831ec4ff83a07d7dc702d79372d8bcaf4594bf0fb6e11e9f027f3e0325de9b19be5f51b7b80ed54a

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_kj5jwz4h.bi4.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\Umbral.exe

Filesize
232KB

MD5
e486d8aafa368a43a56987dd4d80aa75

SHA1
8851fe89928a47a58b50348d9a4458f24e2725f9

SHA256
596ac7d2aa525ceb7b82aec1e6376d34f36649f028de442fb0a0021e380db136

SHA512
abe413e1277c0ac103778822dcd3f6b03f315fad83731af10284a68fca8ecfa2d2c6b9d9c3e0ec55803a2b31d03ae9c863c430eba23954ccc5f82b2a6d21e573

Download Submit
C:\Users\Admin\AppData\Roaming\obxod 266dev.exe

Filesize
80KB

MD5
3598f860aacfe53b00c305715a6c7b2f

SHA1
70640b2e8a71017cdf5fb8e91fe0b065f89a064b

SHA256
b4b8385381c3bb23d821f179a73ff19083d15f7cc6e1c9cc2235da3c382db241

SHA512
0b2bfa9e701ba126acb6bf9b9b5df26e8558a59708659ec2981173267d277f44e6b6575f1ceb945a86705796ea8f50c5cd1617ee45fdaabdc68af9b2022e654c

Download Submit
memory/1180-1-0x0000000000E00000-0x0000000000E58000-memory.dmp

Filesize
352KB

Download
memory/1180-0-0x00007FF8C4953000-0x00007FF8C4955000-memory.dmp

Filesize
8KB

Download
memory/3924-36-0x0000023E1A8F0000-0x0000023E1A912000-memory.dmp

Filesize
136KB

Download
memory/4492-30-0x00007FF8C4950000-0x00007FF8C5412000-memory.dmp

Filesize
10.8MB

Download
memory/4492-28-0x00007FF8C4950000-0x00007FF8C5412000-memory.dmp

Filesize
10.8MB

Download
memory/4492-25-0x000001BF48990000-0x000001BF489D0000-memory.dmp

Filesize
256KB

Download
memory/4904-27-0x00007FF8C4950000-0x00007FF8C5412000-memory.dmp

Filesize
10.8MB

Download
memory/4904-26-0x0000000000600000-0x000000000061A000-memory.dmp

Filesize
104KB

Download
memory/4904-77-0x00007FF8C4950000-0x00007FF8C5412000-memory.dmp

Filesize
10.8MB

Download