umbral | dc7f8c7c39bb043da2c19a03504c499e0af367fefee810a8190c1119992e2248

Analysis

max time kernel
149s
max time network
151s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20250217-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20250217-enlocale:en-usos:windows10-ltsc 2021-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
behavioral4/files/0x000b000000027ddc-19.dat	family_umbral
behavioral4/memory/3080-30-0x00000137F6F90000-0x00000137F6FD0000-memory.dmp	family_umbral

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral4/files/0x000b000000027dd9-6.dat	family_xworm
behavioral4/memory/3536-32-0x00000000004D0000-0x00000000004EA000-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
5104	powershell.exe
3588	powershell.exe
1444	powershell.exe
2600	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-1-5-21-1786400979-876203093-3022739302-1000\Control Panel\International\Geo\Nation	obxod266dev.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1786400979-876203093-3022739302-1000\Control Panel\International\Geo\Nation	obxod 266dev.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
3536	obxod 266dev.exe
3080	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-1-5-21-1786400979-876203093-3022739302-1000\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
3	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
4772	wmic.exe
4772	wmic.exe
4772	wmic.exe
4772	wmic.exe
2600	powershell.exe
2600	powershell.exe
5104	powershell.exe
5104	powershell.exe
3588	powershell.exe
3588	powershell.exe
1444	powershell.exe
1444	powershell.exe
3536	obxod 266dev.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3536	obxod 266dev.exe
Token: SeDebugPrivilege	3080	Umbral.exe
Token: SeIncreaseQuotaPrivilege	4772	wmic.exe
Token: SeSecurityPrivilege	4772	wmic.exe
Token: SeTakeOwnershipPrivilege	4772	wmic.exe
Token: SeLoadDriverPrivilege	4772	wmic.exe
Token: SeSystemProfilePrivilege	4772	wmic.exe
Token: SeSystemtimePrivilege	4772	wmic.exe
Token: SeProfSingleProcessPrivilege	4772	wmic.exe
Token: SeIncBasePriorityPrivilege	4772	wmic.exe
Token: SeCreatePagefilePrivilege	4772	wmic.exe
Token: SeBackupPrivilege	4772	wmic.exe
Token: SeRestorePrivilege	4772	wmic.exe
Token: SeShutdownPrivilege	4772	wmic.exe
Token: SeDebugPrivilege	4772	wmic.exe
Token: SeSystemEnvironmentPrivilege	4772	wmic.exe
Token: SeRemoteShutdownPrivilege	4772	wmic.exe
Token: SeUndockPrivilege	4772	wmic.exe
Token: SeManageVolumePrivilege	4772	wmic.exe
Token: 33	4772	wmic.exe
Token: 34	4772	wmic.exe
Token: 35	4772	wmic.exe
Token: 36	4772	wmic.exe
Token: SeIncreaseQuotaPrivilege	4772	wmic.exe
Token: SeSecurityPrivilege	4772	wmic.exe
Token: SeTakeOwnershipPrivilege	4772	wmic.exe
Token: SeLoadDriverPrivilege	4772	wmic.exe
Token: SeSystemProfilePrivilege	4772	wmic.exe
Token: SeSystemtimePrivilege	4772	wmic.exe
Token: SeProfSingleProcessPrivilege	4772	wmic.exe
Token: SeIncBasePriorityPrivilege	4772	wmic.exe
Token: SeCreatePagefilePrivilege	4772	wmic.exe
Token: SeBackupPrivilege	4772	wmic.exe
Token: SeRestorePrivilege	4772	wmic.exe
Token: SeShutdownPrivilege	4772	wmic.exe
Token: SeDebugPrivilege	4772	wmic.exe
Token: SeSystemEnvironmentPrivilege	4772	wmic.exe
Token: SeRemoteShutdownPrivilege	4772	wmic.exe
Token: SeUndockPrivilege	4772	wmic.exe
Token: SeManageVolumePrivilege	4772	wmic.exe
Token: 33	4772	wmic.exe
Token: 34	4772	wmic.exe
Token: 35	4772	wmic.exe
Token: 36	4772	wmic.exe
Token: SeDebugPrivilege	2600	powershell.exe
Token: SeIncreaseQuotaPrivilege	2600	powershell.exe
Token: SeSecurityPrivilege	2600	powershell.exe
Token: SeTakeOwnershipPrivilege	2600	powershell.exe
Token: SeLoadDriverPrivilege	2600	powershell.exe
Token: SeSystemProfilePrivilege	2600	powershell.exe
Token: SeSystemtimePrivilege	2600	powershell.exe
Token: SeProfSingleProcessPrivilege	2600	powershell.exe
Token: SeIncBasePriorityPrivilege	2600	powershell.exe
Token: SeCreatePagefilePrivilege	2600	powershell.exe
Token: SeBackupPrivilege	2600	powershell.exe
Token: SeRestorePrivilege	2600	powershell.exe
Token: SeShutdownPrivilege	2600	powershell.exe
Token: SeDebugPrivilege	2600	powershell.exe
Token: SeSystemEnvironmentPrivilege	2600	powershell.exe
Token: SeRemoteShutdownPrivilege	2600	powershell.exe
Token: SeUndockPrivilege	2600	powershell.exe
Token: SeManageVolumePrivilege	2600	powershell.exe
Token: 33	2600	powershell.exe
Token: 34	2600	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3536	obxod 266dev.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4940 wrote to memory of 3536	4940	obxod266dev.exe	83
PID 4940 wrote to memory of 3536	4940	obxod266dev.exe	83
PID 4940 wrote to memory of 3080	4940	obxod266dev.exe	84
PID 4940 wrote to memory of 3080	4940	obxod266dev.exe	84
PID 3080 wrote to memory of 4772	3080	Umbral.exe	85
PID 3080 wrote to memory of 4772	3080	Umbral.exe	85
PID 3536 wrote to memory of 2600	3536	obxod 266dev.exe	88
PID 3536 wrote to memory of 2600	3536	obxod 266dev.exe	88
PID 3536 wrote to memory of 5104	3536	obxod 266dev.exe	91
PID 3536 wrote to memory of 5104	3536	obxod 266dev.exe	91
PID 3536 wrote to memory of 3588	3536	obxod 266dev.exe	93
PID 3536 wrote to memory of 3588	3536	obxod 266dev.exe	93
PID 3536 wrote to memory of 1444	3536	obxod 266dev.exe	95
PID 3536 wrote to memory of 1444	3536	obxod 266dev.exe	95

C:\Users\Admin\AppData\Local\Temp\obxod266dev.exe
"C:\Users\Admin\AppData\Local\Temp\obxod266dev.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4940
- C:\Users\Admin\AppData\Roaming\obxod 266dev.exe
  "C:\Users\Admin\AppData\Roaming\obxod 266dev.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:3536
- - 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:2600
- - 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
    PID:5104
- - 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
    PID:3588
- - 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
    PID:1444
- 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:3080
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4772

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
dc217311917aaa731eea5e0420ded642

SHA1
dc4b3751f4d3fdd43df6c8ac96a4595395448f41

SHA256
c1a7d04dac5b30aab109004f46ca62de19b4346e955d6fb43308f47f43918aa3

SHA512
1bad8eec83c9348b8297d1a53e3a374fee336f38a74e8cdb160533b5382b322ce3ab1457933cf9c3ffc0c07d207b2c2ddb31684532dd645fbcbd08ab835c5de4

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

Filesize
1KB

MD5
a44ad67f09ae317957c40cd42c5b1606

SHA1
9a6a90e1a452e11fd82b74cd70a4ae569aaaa0dc

SHA256
1a709f4949054105617aeea21191b7fccecfb9fb3ea6c3bb369f6c523e9ab3bc

SHA512
9c69670c2cb74b51c87d43ddc1f1a8cce90cbfa42da781e4e99faaf20ef2e88a4afba7049f11462fc0c1fe097be0919ba6c5a66a37c9ec2c70a2e6e5ee7a5f3e

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_eegu2d2i.ywy.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/2600-37-0x000001C45BB00000-0x000001C45BB22000-memory.dmp

Filesize
136KB

Download
memory/3080-30-0x00000137F6F90000-0x00000137F6FD0000-memory.dmp

Filesize
256KB

Download
memory/3080-36-0x00007FFAEED10000-0x00007FFAEF7D2000-memory.dmp

Filesize
10.8MB

Download
memory/3080-34-0x00007FFAEED10000-0x00007FFAEF7D2000-memory.dmp

Filesize
10.8MB

Download
memory/3536-33-0x00007FFAEED10000-0x00007FFAEF7D2000-memory.dmp

Filesize
10.8MB

Download
memory/3536-32-0x00000000004D0000-0x00000000004EA000-memory.dmp

Filesize
104KB

Download
memory/3536-87-0x00007FFAEED10000-0x00007FFAEF7D2000-memory.dmp

Filesize
10.8MB

Download
memory/3536-88-0x00007FFAEED10000-0x00007FFAEF7D2000-memory.dmp

Filesize
10.8MB

Download
memory/3536-89-0x00007FFAEED10000-0x00007FFAEF7D2000-memory.dmp

Filesize
10.8MB

Download
memory/4940-0-0x00007FFAEED13000-0x00007FFAEED15000-memory.dmp

Filesize
8KB

Download
memory/4940-1-0x0000000000110000-0x0000000000168000-memory.dmp

Filesize
352KB

Download