umbral | 20367536f2263f53c3a52f574cbe883e539c7b2fb6cf344c8e1c9f6ed69c8c6c

Analysis

max time kernel
31s
max time network
33s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20250217-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20250217-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
19-02-2025 15:39

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General

Target

svchost.exe
Size

603KB
MD5

cbde7887e32b1c0837b4f5feaccfd19a
SHA1

979443ec0ee69c4aa59ba87b7fe631f733f39a68
SHA256

20367536f2263f53c3a52f574cbe883e539c7b2fb6cf344c8e1c9f6ed69c8c6c
SHA512

a8dbf07713cb6773df248f13b387f9edca8083a4f838b82fbfb571a107cd28125138174192f1dd5fa3dce3ed64cfcbb1ae5be1d96a55261b8621005012f050f8
SSDEEP

12288:5LQcwNyJ6oF2FqYTchKt8RjIxEWhD8Tr+38DijMCsiHzBQ:5LGNumChKt8RjOEE8Tr+32yFQ

Score

10^/10

umbral discovery stealer

Malware Config

Signatures

Detect Umbral payload 2 IoCs

resource	yara_rule
behavioral1/files/0x000c000000027d84-6.dat	family_umbral
behavioral1/memory/2284-22-0x0000017861930000-0x0000017861970000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral
Umbral family
umbral

Checks computer location settings 2 TTPs 1 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-1-5-21-1095212214-1383118828-1037266802-1000\Control Panel\International\Geo\Nation	svchost.exe

Executes dropped EXE 2 IoCs

pid	Process
2284	Payload.exe
3160	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.

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

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2424	3160	WerFault.exe	80

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	XClient.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2576	wmic.exe
2576	wmic.exe
2576	wmic.exe
2576	wmic.exe

Suspicious use of AdjustPrivilegeToken 44 IoCs

description	pid	Process
Token: SeDebugPrivilege	2284	Payload.exe
Token: SeIncreaseQuotaPrivilege	2576	wmic.exe
Token: SeSecurityPrivilege	2576	wmic.exe
Token: SeTakeOwnershipPrivilege	2576	wmic.exe
Token: SeLoadDriverPrivilege	2576	wmic.exe
Token: SeSystemProfilePrivilege	2576	wmic.exe
Token: SeSystemtimePrivilege	2576	wmic.exe
Token: SeProfSingleProcessPrivilege	2576	wmic.exe
Token: SeIncBasePriorityPrivilege	2576	wmic.exe
Token: SeCreatePagefilePrivilege	2576	wmic.exe
Token: SeBackupPrivilege	2576	wmic.exe
Token: SeRestorePrivilege	2576	wmic.exe
Token: SeShutdownPrivilege	2576	wmic.exe
Token: SeDebugPrivilege	2576	wmic.exe
Token: SeSystemEnvironmentPrivilege	2576	wmic.exe
Token: SeRemoteShutdownPrivilege	2576	wmic.exe
Token: SeUndockPrivilege	2576	wmic.exe
Token: SeManageVolumePrivilege	2576	wmic.exe
Token: 33	2576	wmic.exe
Token: 34	2576	wmic.exe
Token: 35	2576	wmic.exe
Token: 36	2576	wmic.exe
Token: SeIncreaseQuotaPrivilege	2576	wmic.exe
Token: SeSecurityPrivilege	2576	wmic.exe
Token: SeTakeOwnershipPrivilege	2576	wmic.exe
Token: SeLoadDriverPrivilege	2576	wmic.exe
Token: SeSystemProfilePrivilege	2576	wmic.exe
Token: SeSystemtimePrivilege	2576	wmic.exe
Token: SeProfSingleProcessPrivilege	2576	wmic.exe
Token: SeIncBasePriorityPrivilege	2576	wmic.exe
Token: SeCreatePagefilePrivilege	2576	wmic.exe
Token: SeBackupPrivilege	2576	wmic.exe
Token: SeRestorePrivilege	2576	wmic.exe
Token: SeShutdownPrivilege	2576	wmic.exe
Token: SeDebugPrivilege	2576	wmic.exe
Token: SeSystemEnvironmentPrivilege	2576	wmic.exe
Token: SeRemoteShutdownPrivilege	2576	wmic.exe
Token: SeUndockPrivilege	2576	wmic.exe
Token: SeManageVolumePrivilege	2576	wmic.exe
Token: 33	2576	wmic.exe
Token: 34	2576	wmic.exe
Token: 35	2576	wmic.exe
Token: 36	2576	wmic.exe
Token: SeDebugPrivilege	3160	XClient.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1012 wrote to memory of 2284	1012	svchost.exe	79
PID 1012 wrote to memory of 2284	1012	svchost.exe	79
PID 1012 wrote to memory of 3160	1012	svchost.exe	80
PID 1012 wrote to memory of 3160	1012	svchost.exe	80
PID 1012 wrote to memory of 3160	1012	svchost.exe	80
PID 2284 wrote to memory of 2576	2284	Payload.exe	81
PID 2284 wrote to memory of 2576	2284	Payload.exe	81

C:\Users\Admin\AppData\Local\Temp\svchost.exe
"C:\Users\Admin\AppData\Local\Temp\svchost.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1012
- C:\Users\Admin\AppData\Roaming\Payload.exe
  "C:\Users\Admin\AppData\Roaming\Payload.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2284
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2576
- C:\Users\Admin\AppData\Roaming\XClient.exe
  "C:\Users\Admin\AppData\Roaming\XClient.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:3160
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3160 -s 1764
    3⤵
    - Program crash
    PID:2424

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 488 -p 3160 -ip 3160
1⤵
PID:5016

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Payload.exe

Filesize
229KB

MD5
9d5f474cc6fd587802b7b140290be91f

SHA1
9d409c3cab7eb5c4d2c8f757cb000e9a33ea4d4f

SHA256
6a8322ca1b56240e886c733f0092f962a059c0729f8069632701a4dad8eb9aa5

SHA512
d702a4e564de4b6ad918a5d1e9a4dce28028bf1d583196b67377a67a576a612f86a0d0a1812233b8853faf6dfb162f58d628f13d12c044cf877aeec5ce42e0d5

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

Filesize
364KB

MD5
1f6e76213763de98666126aa0bc6b7a0

SHA1
d38866afdc9485c053bb63b17348dc003b661ed9

SHA256
05ac44c4fe768827e012d4ed73ce74180be394709dadec31144eb2a6f7ca576b

SHA512
9f6fbabbeb52e4008783d3fea5b9e5883fbd2bb44042da722208b885a8118aa3604a2a47bfef0914690c05517de125f4e9e67028b1c1f1b685d1b2d9da9633e0

Download Submit
memory/1012-1-0x0000000000DA0000-0x0000000000E3E000-memory.dmp

Filesize
632KB

Download
memory/1012-0-0x00007FFFC3A13000-0x00007FFFC3A15000-memory.dmp

Filesize
8KB

Download
memory/2284-38-0x00007FFFC3A10000-0x00007FFFC44D2000-memory.dmp

Filesize
10.8MB

Download
memory/2284-22-0x0000017861930000-0x0000017861970000-memory.dmp

Filesize
256KB

Download
memory/2284-32-0x00007FFFC3A10000-0x00007FFFC44D2000-memory.dmp

Filesize
10.8MB

Download
memory/2284-33-0x00007FFFC3A10000-0x00007FFFC44D2000-memory.dmp

Filesize
10.8MB

Download
memory/3160-74-0x0000000004A20000-0x0000000004A93000-memory.dmp

Filesize
460KB

Download
memory/3160-64-0x0000000004A20000-0x0000000004A93000-memory.dmp

Filesize
460KB

Download
memory/3160-35-0x0000000004BC0000-0x0000000005166000-memory.dmp

Filesize
5.6MB

Download
memory/3160-60-0x0000000004A20000-0x0000000004A93000-memory.dmp

Filesize
460KB

Download
memory/3160-78-0x0000000004A20000-0x0000000004A93000-memory.dmp

Filesize
460KB

Download
memory/3160-102-0x0000000004A20000-0x0000000004A93000-memory.dmp

Filesize
460KB

Download
memory/3160-98-0x0000000004A20000-0x0000000004A93000-memory.dmp

Filesize
460KB

Download
memory/3160-94-0x0000000004A20000-0x0000000004A93000-memory.dmp

Filesize
460KB

Download
memory/3160-92-0x0000000004A20000-0x0000000004A93000-memory.dmp

Filesize
460KB

Download
memory/3160-90-0x0000000004A20000-0x0000000004A93000-memory.dmp

Filesize
460KB

Download
memory/3160-88-0x0000000004A20000-0x0000000004A93000-memory.dmp

Filesize
460KB

Download
memory/3160-86-0x0000000004A20000-0x0000000004A93000-memory.dmp

Filesize
460KB

Download
memory/3160-84-0x0000000004A20000-0x0000000004A93000-memory.dmp

Filesize
460KB

Download
memory/3160-82-0x0000000004A20000-0x0000000004A93000-memory.dmp

Filesize
460KB

Download
memory/3160-34-0x00000000025F0000-0x000000000266A000-memory.dmp

Filesize
488KB

Download
memory/3160-72-0x0000000004A20000-0x0000000004A93000-memory.dmp

Filesize
460KB

Download
memory/3160-70-0x0000000004A20000-0x0000000004A93000-memory.dmp

Filesize
460KB

Download
memory/3160-68-0x0000000004A20000-0x0000000004A93000-memory.dmp

Filesize
460KB

Download
memory/3160-66-0x0000000004A20000-0x0000000004A93000-memory.dmp

Filesize
460KB

Download
memory/3160-36-0x0000000004A20000-0x0000000004A98000-memory.dmp

Filesize
480KB

Download
memory/3160-62-0x0000000004A20000-0x0000000004A93000-memory.dmp

Filesize
460KB

Download
memory/3160-56-0x0000000004A20000-0x0000000004A93000-memory.dmp

Filesize
460KB

Download
memory/3160-52-0x0000000004A20000-0x0000000004A93000-memory.dmp

Filesize
460KB

Download
memory/3160-50-0x0000000004A20000-0x0000000004A93000-memory.dmp

Filesize
460KB

Download
memory/3160-49-0x0000000004A20000-0x0000000004A93000-memory.dmp

Filesize
460KB

Download
memory/3160-42-0x0000000004A20000-0x0000000004A93000-memory.dmp

Filesize
460KB

Download
memory/3160-40-0x0000000004A20000-0x0000000004A93000-memory.dmp

Filesize
460KB

Download
memory/3160-39-0x0000000004A20000-0x0000000004A93000-memory.dmp

Filesize
460KB

Download
memory/3160-100-0x0000000004A20000-0x0000000004A93000-memory.dmp

Filesize
460KB

Download
memory/3160-96-0x0000000004A20000-0x0000000004A93000-memory.dmp

Filesize
460KB

Download
memory/3160-81-0x0000000004A20000-0x0000000004A93000-memory.dmp

Filesize
460KB

Download
memory/3160-76-0x0000000004A20000-0x0000000004A93000-memory.dmp

Filesize
460KB

Download
memory/3160-58-0x0000000004A20000-0x0000000004A93000-memory.dmp

Filesize
460KB

Download
memory/3160-54-0x0000000004A20000-0x0000000004A93000-memory.dmp

Filesize
460KB

Download
memory/3160-46-0x0000000004A20000-0x0000000004A93000-memory.dmp

Filesize
460KB

Download
memory/3160-44-0x0000000004A20000-0x0000000004A93000-memory.dmp

Filesize
460KB

Download
memory/3160-2691-0x0000000004AC0000-0x0000000004B5C000-memory.dmp

Filesize
624KB

Download
memory/3160-2692-0x0000000005170000-0x00000000051D6000-memory.dmp

Filesize
408KB

Download
memory/3160-2693-0x00000000051E0000-0x0000000005272000-memory.dmp

Filesize
584KB

Download