umbral | f6cf0bc000965baa8fd8c103be34aa1ca9514c3e97f0a48b4558d2ab8b346e9c

Analysis

max time kernel
147s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20250211-en
resource tags

arch:x64arch:x86image:win11-20250211-enlocale:en-usos:windows11-21h2-x64system
submitted
12-02-2025 16:01

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General

Target

Output.exe
Size

318KB
MD5

76250a84f46395d5e50ba0178b714099
SHA1

fde7f65d449d42bd59d38ad99430663f7c4ece51
SHA256

f6cf0bc000965baa8fd8c103be34aa1ca9514c3e97f0a48b4558d2ab8b346e9c
SHA512

6bfb0eb5482e7635e25b65ac3e45e6eaf80e051cf742c7523ee4ff7b2de283e80d4294981747ad740a79f2ed0b54e068a75c3df69c85a9da423d5d3932ec0705
SSDEEP

6144:o2EX/IoKtm284A7aWAAAs1JuNAbq1QQYNbmkWA:3EXQDtN84YaWAA3IAuJO

Score

10^/10

umbral xworm discovery rat stealer trojan

Malware Config

Extracted

Family

xworm

147.185.221.25:64820

Attributes

Install_directory
%Temp%
install_file
SecurityHost.exe
telegram
https://api.telegram.org/bot7873282441:AAFVeYQ8VZCC3gF8qlaTYIz4N-gMEL21mHI/sendMessage?chat_id=7952080340

Signatures

Detect Umbral payload 2 IoCs

resource	yara_rule
behavioral2/files/0x001d00000002adce-35.dat	family_umbral
behavioral2/memory/2244-61-0x000001E0EA180000-0x000001E0EA1C0000-memory.dmp	family_umbral

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x001d00000002ad4e-6.dat	family_xworm
behavioral2/memory/3612-62-0x0000000000340000-0x0000000000358000-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

Downloads MZ/PE file 1 IoCs

flow	pid	Process
13	1228	Process not Found

Executes dropped EXE 2 IoCs

pid	Process
3612	1.16.5.exe
2244	SystemHost.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

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MicrosoftEdgeUpdate.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
1600	MicrosoftEdgeUpdate.exe

Suspicious use of AdjustPrivilegeToken 44 IoCs

description	pid	Process
Token: SeDebugPrivilege	3612	1.16.5.exe
Token: SeDebugPrivilege	2244	SystemHost.exe
Token: SeIncreaseQuotaPrivilege	1268	wmic.exe
Token: SeSecurityPrivilege	1268	wmic.exe
Token: SeTakeOwnershipPrivilege	1268	wmic.exe
Token: SeLoadDriverPrivilege	1268	wmic.exe
Token: SeSystemProfilePrivilege	1268	wmic.exe
Token: SeSystemtimePrivilege	1268	wmic.exe
Token: SeProfSingleProcessPrivilege	1268	wmic.exe
Token: SeIncBasePriorityPrivilege	1268	wmic.exe
Token: SeCreatePagefilePrivilege	1268	wmic.exe
Token: SeBackupPrivilege	1268	wmic.exe
Token: SeRestorePrivilege	1268	wmic.exe
Token: SeShutdownPrivilege	1268	wmic.exe
Token: SeDebugPrivilege	1268	wmic.exe
Token: SeSystemEnvironmentPrivilege	1268	wmic.exe
Token: SeRemoteShutdownPrivilege	1268	wmic.exe
Token: SeUndockPrivilege	1268	wmic.exe
Token: SeManageVolumePrivilege	1268	wmic.exe
Token: 33	1268	wmic.exe
Token: 34	1268	wmic.exe
Token: 35	1268	wmic.exe
Token: 36	1268	wmic.exe
Token: SeIncreaseQuotaPrivilege	1268	wmic.exe
Token: SeSecurityPrivilege	1268	wmic.exe
Token: SeTakeOwnershipPrivilege	1268	wmic.exe
Token: SeLoadDriverPrivilege	1268	wmic.exe
Token: SeSystemProfilePrivilege	1268	wmic.exe
Token: SeSystemtimePrivilege	1268	wmic.exe
Token: SeProfSingleProcessPrivilege	1268	wmic.exe
Token: SeIncBasePriorityPrivilege	1268	wmic.exe
Token: SeCreatePagefilePrivilege	1268	wmic.exe
Token: SeBackupPrivilege	1268	wmic.exe
Token: SeRestorePrivilege	1268	wmic.exe
Token: SeShutdownPrivilege	1268	wmic.exe
Token: SeDebugPrivilege	1268	wmic.exe
Token: SeSystemEnvironmentPrivilege	1268	wmic.exe
Token: SeRemoteShutdownPrivilege	1268	wmic.exe
Token: SeUndockPrivilege	1268	wmic.exe
Token: SeManageVolumePrivilege	1268	wmic.exe
Token: 33	1268	wmic.exe
Token: 34	1268	wmic.exe
Token: 35	1268	wmic.exe
Token: 36	1268	wmic.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4356 wrote to memory of 3612	4356	Output.exe	85
PID 4356 wrote to memory of 3612	4356	Output.exe	85
PID 4356 wrote to memory of 2244	4356	Output.exe	86
PID 4356 wrote to memory of 2244	4356	Output.exe	86
PID 2244 wrote to memory of 1268	2244	SystemHost.exe	87
PID 2244 wrote to memory of 1268	2244	SystemHost.exe	87

C:\Users\Admin\AppData\Local\Temp\Output.exe
"C:\Users\Admin\AppData\Local\Temp\Output.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4356
- C:\Users\Admin\1.16.5.exe
  "C:\Users\Admin\1.16.5.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:3612
- C:\Users\Admin\SystemHost.exe
  "C:\Users\Admin\SystemHost.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2244
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:1268

C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe
"C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe" /ping 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-PG9lbSBwcm9kdWN0X21hbnVmYWN0dXJlcj0iIiBwcm9kdWN0X25hbWU9IiIvPjxleHAgZXRhZz0iJnF1b3Q7RSt4YkF6Nlk2c1UxMjg5YlM2cWw0VlJMYmtqZkJVR1RNSnNqckhyNDRpST0mcXVvdDsiLz48YXBwIGFwcGlkPSJ7OEE2OUQzNDUtRDU2NC00NjNjLUFGRjEtQTY5RDlFNTMwRjk2fSIgdmVyc2lvbj0iMTIzLjAuNjMxMi4xMjMiIG5leHR2ZXJzaW9uPSIiIGxhbmc9ImVuIiBicmFuZD0iR0dMUyIgY2xpZW50PSIiIGluc3RhbGxhZ2U9IjEiIGluc3RhbGxkYXRldGltZT0iMTczOTI4MjMwMiIgb29iZV9pbnN0YWxsX3RpbWU9IjEzMzgzNzUzNTk3Mjc0MDAwMCI-PGV2ZW50IGV2ZW50dHlwZT0iMzEiIGV2ZW50cmVzdWx0PSIxIiBlcnJvcmNvZGU9IjAiIGV4dHJhY29kZTE9IjIxNzk4NjIiIHN5c3RlbV91cHRpbWVfdGlja3M9IjUyNjk1MDA5NjUiLz48L2FwcD48L3JlcXVlc3Q-
1⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
PID:1600

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\1.16.5.exe

Filesize
74KB

MD5
3f1ac1dffbe4df5e87166066deee2410

SHA1
43f9efcdb2bef961228ae0f3004b73949ee94984

SHA256
15306ecd3704d44dc0ad16a88e94a73fb59252dc6ec308b291db7138dd811bda

SHA512
4b5ae7a83c1abd3f2492859ec2e0b63e644476c647092da2df9d45ac93b6014e89b44e1c3ec60fe2ac1a3d428efa26e22714fff5b6bda183086bd00f6c18c59e

Download Submit
C:\Users\Admin\SystemHost.exe

Filesize
227KB

MD5
e07b0bddb4e6c86e0e565ec1623d35c4

SHA1
11bc4bb5b2af5633a50c2bfb6b1b9b23b7f27fc7

SHA256
35c09de560097ccb637a089452552fcd8313dcb4a75e9a85c60501b35e477f9f

SHA512
3af156d2b01cd43f01843ae3335ad0603a5d86196f04bc2b49467060b4a761f10ec11222dbdb3bb5e1387921e0113b10e629e35945bf6f192fc6140e5b3a036e

Download Submit
memory/2244-61-0x000001E0EA180000-0x000001E0EA1C0000-memory.dmp

Filesize
256KB

Download
memory/2244-64-0x00007FFC4E610000-0x00007FFC4F0D2000-memory.dmp

Filesize
10.8MB

Download
memory/2244-66-0x00007FFC4E610000-0x00007FFC4F0D2000-memory.dmp

Filesize
10.8MB

Download
memory/3612-62-0x0000000000340000-0x0000000000358000-memory.dmp

Filesize
96KB

Download
memory/3612-63-0x00007FFC4E610000-0x00007FFC4F0D2000-memory.dmp

Filesize
10.8MB

Download
memory/3612-67-0x00007FFC4E610000-0x00007FFC4F0D2000-memory.dmp

Filesize
10.8MB

Download
memory/4356-0-0x00007FFC4E613000-0x00007FFC4E615000-memory.dmp

Filesize
8KB

Download
memory/4356-1-0x0000000000C40000-0x0000000000C96000-memory.dmp

Filesize
344KB

Download