umbral | c2896e90b50b14aa6ad8d39f7d828f92e963f6b756e8cb2d075046913e497a81

Analysis

max time kernel
125s
max time network
143s
platform
windows11-21h2_x64
resource
win11-20231128-en
resource tags

arch:x64arch:x86image:win11-20231128-enlocale:en-usos:windows11-21h2-x64system
submitted
06-12-2023 02:39

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General

Target

HWID.exe
Size

149KB
MD5

2c1ec91ada25a4a34441200dd9773c2a
SHA1

80154f3f48a32866de9742bed33ebb907086125e
SHA256

0f8980228acd3d9dd7bc9208c13a68b244ee903212327e4d350a82010aa37993
SHA512

0ff2d7b2ac069c8bb2b381333f896b2d09ee0c0ec23b1943c35ae758adc71bd34c69502fb22208b1bdb568bda8a908ed548f407010d09532664b02d83fde5b99
SSDEEP

3072:+r8dXu13UyQlK/UbZcZJuQCdM79xQbj8alpC5cgiTWMolM2i:+r8de1krcsbQuQpUQallgiboF

Score

10^/10

umbral xworm rat stealer trojan

Malware Config

Extracted

Family

umbral

https://discord.com/api/webhooks/1181010758201520208/iCxvWqp_69ofS-eHs5naW1_4vBzPxLSr9zIR5Bso1e4orm8yDICPrre5CTF60DCywY_3

Extracted

Family

xworm

owner-cc.gl.at.ply.gg:32281

Attributes

Install_directory
%AppData%
install_file
WindowsSoundSystem.exe

Signatures

Detect Umbral payload 4 IoCs

resource	yara_rule
behavioral3/files/0x000100000002a890-24.dat	family_umbral
behavioral3/memory/4000-26-0x000001C61AAA0000-0x000001C61AAE0000-memory.dmp	family_umbral
behavioral3/files/0x000100000002a890-23.dat	family_umbral
behavioral3/files/0x000100000002a890-18.dat	family_umbral

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral3/files/0x000100000002a88f-7.dat	family_xworm
behavioral3/memory/2736-27-0x0000000000390000-0x00000000003AA000-memory.dmp	family_xworm
behavioral3/files/0x000100000002a88f-13.dat	family_xworm
behavioral3/files/0x000100000002a88f-12.dat	family_xworm

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral
Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
2736	Windows sound.exe
4000	Windows Blue Tooth.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 use of AdjustPrivilegeToken 46 IoCs

description	pid	Process
Token: SeDebugPrivilege	4432	HWID.exe
Token: SeDebugPrivilege	2736	Windows sound.exe
Token: SeDebugPrivilege	4000	Windows Blue Tooth.exe
Token: SeIncreaseQuotaPrivilege	1340	wmic.exe
Token: SeSecurityPrivilege	1340	wmic.exe
Token: SeTakeOwnershipPrivilege	1340	wmic.exe
Token: SeLoadDriverPrivilege	1340	wmic.exe
Token: SeSystemProfilePrivilege	1340	wmic.exe
Token: SeSystemtimePrivilege	1340	wmic.exe
Token: SeProfSingleProcessPrivilege	1340	wmic.exe
Token: SeIncBasePriorityPrivilege	1340	wmic.exe
Token: SeCreatePagefilePrivilege	1340	wmic.exe
Token: SeBackupPrivilege	1340	wmic.exe
Token: SeRestorePrivilege	1340	wmic.exe
Token: SeShutdownPrivilege	1340	wmic.exe
Token: SeDebugPrivilege	1340	wmic.exe
Token: SeSystemEnvironmentPrivilege	1340	wmic.exe
Token: SeRemoteShutdownPrivilege	1340	wmic.exe
Token: SeUndockPrivilege	1340	wmic.exe
Token: SeManageVolumePrivilege	1340	wmic.exe
Token: 33	1340	wmic.exe
Token: 34	1340	wmic.exe
Token: 35	1340	wmic.exe
Token: 36	1340	wmic.exe
Token: SeIncreaseQuotaPrivilege	1340	wmic.exe
Token: SeSecurityPrivilege	1340	wmic.exe
Token: SeTakeOwnershipPrivilege	1340	wmic.exe
Token: SeLoadDriverPrivilege	1340	wmic.exe
Token: SeSystemProfilePrivilege	1340	wmic.exe
Token: SeSystemtimePrivilege	1340	wmic.exe
Token: SeProfSingleProcessPrivilege	1340	wmic.exe
Token: SeIncBasePriorityPrivilege	1340	wmic.exe
Token: SeCreatePagefilePrivilege	1340	wmic.exe
Token: SeBackupPrivilege	1340	wmic.exe
Token: SeRestorePrivilege	1340	wmic.exe
Token: SeShutdownPrivilege	1340	wmic.exe
Token: SeDebugPrivilege	1340	wmic.exe
Token: SeSystemEnvironmentPrivilege	1340	wmic.exe
Token: SeRemoteShutdownPrivilege	1340	wmic.exe
Token: SeUndockPrivilege	1340	wmic.exe
Token: SeManageVolumePrivilege	1340	wmic.exe
Token: 33	1340	wmic.exe
Token: 34	1340	wmic.exe
Token: 35	1340	wmic.exe
Token: 36	1340	wmic.exe
Token: SeDebugPrivilege	2736	Windows sound.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4432 wrote to memory of 2736	4432	HWID.exe	81
PID 4432 wrote to memory of 2736	4432	HWID.exe	81
PID 4432 wrote to memory of 4000	4432	HWID.exe	78
PID 4432 wrote to memory of 4000	4432	HWID.exe	78
PID 4000 wrote to memory of 1340	4000	Windows Blue Tooth.exe	80
PID 4000 wrote to memory of 1340	4000	Windows Blue Tooth.exe	80

C:\Users\Admin\AppData\Local\Temp\HWID.exe
"C:\Users\Admin\AppData\Local\Temp\HWID.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4432
- C:\Users\Admin\AppData\Local\Temp\Windows Blue Tooth.exe
  "C:\Users\Admin\AppData\Local\Temp\Windows Blue Tooth.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4000
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:1340
- C:\Users\Admin\AppData\Local\Temp\Windows sound.exe
  "C:\Users\Admin\AppData\Local\Temp\Windows sound.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2736

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Windows Blue Tooth.exe

Filesize
229KB

MD5
33405e3ec22e3bd98c3339fa179438b6

SHA1
77134fb582641f0a54007b6ea92c5ad62ef3ed62

SHA256
f336096f486e9507e51d6cf172745ab126cd57f98e3b9429e77f488c65a59019

SHA512
fa8649a280a4b8099f6c46a71226e8e03388c794c3cdded278128322d612a48a85dfbe7467da2c8079ff4fefde9491e4e867c6e4786bf690f76acbc948880f56

Download Submit
C:\Users\Admin\AppData\Local\Temp\Windows Blue Tooth.exe

Filesize
229KB

MD5
33405e3ec22e3bd98c3339fa179438b6

SHA1
77134fb582641f0a54007b6ea92c5ad62ef3ed62

SHA256
f336096f486e9507e51d6cf172745ab126cd57f98e3b9429e77f488c65a59019

SHA512
fa8649a280a4b8099f6c46a71226e8e03388c794c3cdded278128322d612a48a85dfbe7467da2c8079ff4fefde9491e4e867c6e4786bf690f76acbc948880f56

Download Submit
C:\Users\Admin\AppData\Local\Temp\Windows Blue Tooth.exe

Filesize
229KB

MD5
33405e3ec22e3bd98c3339fa179438b6

SHA1
77134fb582641f0a54007b6ea92c5ad62ef3ed62

SHA256
f336096f486e9507e51d6cf172745ab126cd57f98e3b9429e77f488c65a59019

SHA512
fa8649a280a4b8099f6c46a71226e8e03388c794c3cdded278128322d612a48a85dfbe7467da2c8079ff4fefde9491e4e867c6e4786bf690f76acbc948880f56

Download Submit
C:\Users\Admin\AppData\Local\Temp\Windows sound.exe

Filesize
75KB

MD5
cf4187443a0b1f17e74f66723631a822

SHA1
2e17093723097c3729d29d19da3df6d7e18e37be

SHA256
5eed1e22f8d10b33233ff690d9fc10df6e419c7c7d6223230bbd0d8efaa51887

SHA512
2f4865810ad1f291018babd5ec627360d460e29647f6383d0afc6c2f219fd78ddb5113cfa3f27d125d0a59216588805f86b7fa78f3b5f4d45d15192f72d134a7

Download Submit
C:\Users\Admin\AppData\Local\Temp\Windows sound.exe

Filesize
75KB

MD5
cf4187443a0b1f17e74f66723631a822

SHA1
2e17093723097c3729d29d19da3df6d7e18e37be

SHA256
5eed1e22f8d10b33233ff690d9fc10df6e419c7c7d6223230bbd0d8efaa51887

SHA512
2f4865810ad1f291018babd5ec627360d460e29647f6383d0afc6c2f219fd78ddb5113cfa3f27d125d0a59216588805f86b7fa78f3b5f4d45d15192f72d134a7

Download Submit
C:\Users\Admin\AppData\Local\Temp\Windows sound.exe

Filesize
75KB

MD5
cf4187443a0b1f17e74f66723631a822

SHA1
2e17093723097c3729d29d19da3df6d7e18e37be

SHA256
5eed1e22f8d10b33233ff690d9fc10df6e419c7c7d6223230bbd0d8efaa51887

SHA512
2f4865810ad1f291018babd5ec627360d460e29647f6383d0afc6c2f219fd78ddb5113cfa3f27d125d0a59216588805f86b7fa78f3b5f4d45d15192f72d134a7

Download Submit
memory/2736-40-0x0000000002550000-0x0000000002560000-memory.dmp

Filesize
64KB

Download
memory/2736-28-0x00007FFA13E40000-0x00007FFA14902000-memory.dmp

Filesize
10.8MB

Download
memory/2736-27-0x0000000000390000-0x00000000003AA000-memory.dmp

Filesize
104KB

Download
memory/2736-39-0x00007FFA13E40000-0x00007FFA14902000-memory.dmp

Filesize
10.8MB

Download
memory/2736-34-0x0000000002550000-0x0000000002560000-memory.dmp

Filesize
64KB

Download
memory/4000-33-0x00007FFA13E40000-0x00007FFA14902000-memory.dmp

Filesize
10.8MB

Download
memory/4000-26-0x000001C61AAA0000-0x000001C61AAE0000-memory.dmp

Filesize
256KB

Download
memory/4000-29-0x00007FFA13E40000-0x00007FFA14902000-memory.dmp

Filesize
10.8MB

Download
memory/4000-31-0x000001C635050000-0x000001C635060000-memory.dmp

Filesize
64KB

Download
memory/4432-1-0x00007FFA13E40000-0x00007FFA14902000-memory.dmp

Filesize
10.8MB

Download
memory/4432-2-0x000000001BBD0000-0x000000001BBE0000-memory.dmp

Filesize
64KB

Download
memory/4432-30-0x00007FFA13E40000-0x00007FFA14902000-memory.dmp

Filesize
10.8MB

Download
memory/4432-0-0x0000000000930000-0x000000000095C000-memory.dmp

Filesize
176KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads