umbral | dc7f8c7c39bb043da2c19a03504c499e0af367fefee810a8190c1119992e2248

Analysis

max time kernel
146s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20250217-en
resource tags

arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system
submitted
23-02-2025 10:42

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

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
behavioral3/files/0x000b000000023c0c-16.dat	family_umbral
behavioral3/memory/1372-25-0x0000020166770000-0x00000201667B0000-memory.dmp	family_umbral

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral3/files/0x000c000000023baa-6.dat	family_xworm
behavioral3/memory/1928-26-0x0000000000BB0000-0x0000000000BCA000-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
2788	powershell.exe
3300	powershell.exe
3032	powershell.exe
3656	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-1-5-21-925314154-1797147466-1467878628-1000\Control Panel\International\Geo\Nation	obxod 266dev.exe
Key value queried	\REGISTRY\USER\S-1-5-21-925314154-1797147466-1467878628-1000\Control Panel\International\Geo\Nation	obxod266dev.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	obxod 266dev.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	obxod 266dev.exe

Executes dropped EXE 2 IoCs

pid	Process
1928	obxod 266dev.exe
1372	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-1-5-21-925314154-1797147466-1467878628-1000\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 9 IoCs

pid	Process
2788	powershell.exe
2788	powershell.exe
3300	powershell.exe
3300	powershell.exe
3032	powershell.exe
3032	powershell.exe
3656	powershell.exe
3656	powershell.exe
1928	obxod 266dev.exe

Suspicious use of AdjustPrivilegeToken 49 IoCs

description	pid	Process
Token: SeDebugPrivilege	1928	obxod 266dev.exe
Token: SeDebugPrivilege	1372	Umbral.exe
Token: SeIncreaseQuotaPrivilege	2492	wmic.exe
Token: SeSecurityPrivilege	2492	wmic.exe
Token: SeTakeOwnershipPrivilege	2492	wmic.exe
Token: SeLoadDriverPrivilege	2492	wmic.exe
Token: SeSystemProfilePrivilege	2492	wmic.exe
Token: SeSystemtimePrivilege	2492	wmic.exe
Token: SeProfSingleProcessPrivilege	2492	wmic.exe
Token: SeIncBasePriorityPrivilege	2492	wmic.exe
Token: SeCreatePagefilePrivilege	2492	wmic.exe
Token: SeBackupPrivilege	2492	wmic.exe
Token: SeRestorePrivilege	2492	wmic.exe
Token: SeShutdownPrivilege	2492	wmic.exe
Token: SeDebugPrivilege	2492	wmic.exe
Token: SeSystemEnvironmentPrivilege	2492	wmic.exe
Token: SeRemoteShutdownPrivilege	2492	wmic.exe
Token: SeUndockPrivilege	2492	wmic.exe
Token: SeManageVolumePrivilege	2492	wmic.exe
Token: 33	2492	wmic.exe
Token: 34	2492	wmic.exe
Token: 35	2492	wmic.exe
Token: 36	2492	wmic.exe
Token: SeIncreaseQuotaPrivilege	2492	wmic.exe
Token: SeSecurityPrivilege	2492	wmic.exe
Token: SeTakeOwnershipPrivilege	2492	wmic.exe
Token: SeLoadDriverPrivilege	2492	wmic.exe
Token: SeSystemProfilePrivilege	2492	wmic.exe
Token: SeSystemtimePrivilege	2492	wmic.exe
Token: SeProfSingleProcessPrivilege	2492	wmic.exe
Token: SeIncBasePriorityPrivilege	2492	wmic.exe
Token: SeCreatePagefilePrivilege	2492	wmic.exe
Token: SeBackupPrivilege	2492	wmic.exe
Token: SeRestorePrivilege	2492	wmic.exe
Token: SeShutdownPrivilege	2492	wmic.exe
Token: SeDebugPrivilege	2492	wmic.exe
Token: SeSystemEnvironmentPrivilege	2492	wmic.exe
Token: SeRemoteShutdownPrivilege	2492	wmic.exe
Token: SeUndockPrivilege	2492	wmic.exe
Token: SeManageVolumePrivilege	2492	wmic.exe
Token: 33	2492	wmic.exe
Token: 34	2492	wmic.exe
Token: 35	2492	wmic.exe
Token: 36	2492	wmic.exe
Token: SeDebugPrivilege	2788	powershell.exe
Token: SeDebugPrivilege	3300	powershell.exe
Token: SeDebugPrivilege	3032	powershell.exe
Token: SeDebugPrivilege	3656	powershell.exe
Token: SeDebugPrivilege	1928	obxod 266dev.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1928	obxod 266dev.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 536 wrote to memory of 1928	536	obxod266dev.exe	85
PID 536 wrote to memory of 1928	536	obxod266dev.exe	85
PID 536 wrote to memory of 1372	536	obxod266dev.exe	86
PID 536 wrote to memory of 1372	536	obxod266dev.exe	86
PID 1372 wrote to memory of 2492	1372	Umbral.exe	87
PID 1372 wrote to memory of 2492	1372	Umbral.exe	87
PID 1928 wrote to memory of 2788	1928	obxod 266dev.exe	92
PID 1928 wrote to memory of 2788	1928	obxod 266dev.exe	92
PID 1928 wrote to memory of 3300	1928	obxod 266dev.exe	94
PID 1928 wrote to memory of 3300	1928	obxod 266dev.exe	94
PID 1928 wrote to memory of 3032	1928	obxod 266dev.exe	96
PID 1928 wrote to memory of 3032	1928	obxod 266dev.exe	96
PID 1928 wrote to memory of 3656	1928	obxod 266dev.exe	98
PID 1928 wrote to memory of 3656	1928	obxod 266dev.exe	98

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:536
- 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:1928
- - 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:2788
- - 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:3300
- - 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:3032
- - 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:3656
- 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:1372
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:2492

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

Filesize
944B

MD5
d28a889fd956d5cb3accfbaf1143eb6f

SHA1
157ba54b365341f8ff06707d996b3635da8446f7

SHA256
21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

SHA512
0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

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

Filesize
944B

MD5
e60eb305a7b2d9907488068b7065abd3

SHA1
1643dd7f915ac50c75bc01c53d68c5dafb9ce28d

SHA256
ad07460e061642c0dd4e7dfa7b821aacce873e290389e72f708e9f3504f9d135

SHA512
95c45afec6fa4e0b2a21edd10a6b2dc30568810c67bc9bc34d98ab111c48261f377a370583adb27e08616b0108026c119493b1b093b52ce931117e646b46cb7b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ywkf21da.ykc.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/536-1-0x00000000009C0000-0x0000000000A18000-memory.dmp

Filesize
352KB

Download
memory/536-0-0x00007FFC7F7E3000-0x00007FFC7F7E5000-memory.dmp

Filesize
8KB

Download
memory/1372-25-0x0000020166770000-0x00000201667B0000-memory.dmp

Filesize
256KB

Download
memory/1372-30-0x00007FFC7F7E0000-0x00007FFC802A1000-memory.dmp

Filesize
10.8MB

Download
memory/1372-28-0x00007FFC7F7E0000-0x00007FFC802A1000-memory.dmp

Filesize
10.8MB

Download
memory/1928-27-0x00007FFC7F7E0000-0x00007FFC802A1000-memory.dmp

Filesize
10.8MB

Download
memory/1928-26-0x0000000000BB0000-0x0000000000BCA000-memory.dmp

Filesize
104KB

Download
memory/1928-81-0x00007FFC7F7E0000-0x00007FFC802A1000-memory.dmp

Filesize
10.8MB

Download
memory/1928-82-0x00007FFC7F7E0000-0x00007FFC802A1000-memory.dmp

Filesize
10.8MB

Download
memory/1928-83-0x00007FFC7F7E0000-0x00007FFC802A1000-memory.dmp

Filesize
10.8MB

Download
memory/2788-31-0x0000019F7F930000-0x0000019F7F952000-memory.dmp

Filesize
136KB

Download