umbral | 0f8980228acd3d9dd7bc9208c13a68b244ee903212327e4d350a82010aa37993

Analysis

max time kernel
33s
max time network
37s
platform
windows11-21h2_x64
resource
win11-20231128-en
resource tags

arch:x64arch:x86image:win11-20231128-enlocale:en-usos:windows11-21h2-x64system
submitted
07-12-2023 21:24

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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

xworm

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

Attributes

Install_directory
%AppData%
install_file
WindowsSoundSystem.exe

Extracted

Family

umbral

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

Signatures

Detect Umbral payload 6 IoCs

resource	yara_rule
behavioral1/files/0x000200000002a7be-18.dat	family_umbral
behavioral1/memory/2040-25-0x00000209786C0000-0x0000020978700000-memory.dmp	family_umbral
behavioral1/files/0x000200000002a7be-24.dat	family_umbral
behavioral1/files/0x000200000002a7be-23.dat	family_umbral
behavioral1/files/0x000200000002a7be-55.dat	family_umbral
behavioral1/files/0x000200000002a7be-53.dat	family_umbral

Detect Xworm Payload 5 IoCs

resource	yara_rule
behavioral1/files/0x000300000002a7ba-7.dat	family_xworm
behavioral1/files/0x000300000002a7ba-13.dat	family_xworm
behavioral1/files/0x000300000002a7ba-12.dat	family_xworm
behavioral1/memory/2472-28-0x0000000000100000-0x000000000011A000-memory.dmp	family_xworm
behavioral1/files/0x000300000002a7ba-44.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 4 IoCs

pid	Process
2472	Windows sound.exe
2040	Windows Blue Tooth.exe
2136	Windows sound.exe
812	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 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2740	HWID.exe
Token: SeDebugPrivilege	2472	Windows sound.exe
Token: SeDebugPrivilege	2040	Windows Blue Tooth.exe
Token: SeIncreaseQuotaPrivilege	4064	wmic.exe
Token: SeSecurityPrivilege	4064	wmic.exe
Token: SeTakeOwnershipPrivilege	4064	wmic.exe
Token: SeLoadDriverPrivilege	4064	wmic.exe
Token: SeSystemProfilePrivilege	4064	wmic.exe
Token: SeSystemtimePrivilege	4064	wmic.exe
Token: SeProfSingleProcessPrivilege	4064	wmic.exe
Token: SeIncBasePriorityPrivilege	4064	wmic.exe
Token: SeCreatePagefilePrivilege	4064	wmic.exe
Token: SeBackupPrivilege	4064	wmic.exe
Token: SeRestorePrivilege	4064	wmic.exe
Token: SeShutdownPrivilege	4064	wmic.exe
Token: SeDebugPrivilege	4064	wmic.exe
Token: SeSystemEnvironmentPrivilege	4064	wmic.exe
Token: SeRemoteShutdownPrivilege	4064	wmic.exe
Token: SeUndockPrivilege	4064	wmic.exe
Token: SeManageVolumePrivilege	4064	wmic.exe
Token: 33	4064	wmic.exe
Token: 34	4064	wmic.exe
Token: 35	4064	wmic.exe
Token: 36	4064	wmic.exe
Token: SeIncreaseQuotaPrivilege	4064	wmic.exe
Token: SeSecurityPrivilege	4064	wmic.exe
Token: SeTakeOwnershipPrivilege	4064	wmic.exe
Token: SeLoadDriverPrivilege	4064	wmic.exe
Token: SeSystemProfilePrivilege	4064	wmic.exe
Token: SeSystemtimePrivilege	4064	wmic.exe
Token: SeProfSingleProcessPrivilege	4064	wmic.exe
Token: SeIncBasePriorityPrivilege	4064	wmic.exe
Token: SeCreatePagefilePrivilege	4064	wmic.exe
Token: SeBackupPrivilege	4064	wmic.exe
Token: SeRestorePrivilege	4064	wmic.exe
Token: SeShutdownPrivilege	4064	wmic.exe
Token: SeDebugPrivilege	4064	wmic.exe
Token: SeSystemEnvironmentPrivilege	4064	wmic.exe
Token: SeRemoteShutdownPrivilege	4064	wmic.exe
Token: SeUndockPrivilege	4064	wmic.exe
Token: SeManageVolumePrivilege	4064	wmic.exe
Token: 33	4064	wmic.exe
Token: 34	4064	wmic.exe
Token: 35	4064	wmic.exe
Token: 36	4064	wmic.exe
Token: SeDebugPrivilege	2472	Windows sound.exe
Token: SeDebugPrivilege	4460	HWID.exe
Token: SeDebugPrivilege	2136	Windows sound.exe
Token: SeDebugPrivilege	812	Windows Blue Tooth.exe
Token: SeIncreaseQuotaPrivilege	3600	wmic.exe
Token: SeSecurityPrivilege	3600	wmic.exe
Token: SeTakeOwnershipPrivilege	3600	wmic.exe
Token: SeLoadDriverPrivilege	3600	wmic.exe
Token: SeSystemProfilePrivilege	3600	wmic.exe
Token: SeSystemtimePrivilege	3600	wmic.exe
Token: SeProfSingleProcessPrivilege	3600	wmic.exe
Token: SeIncBasePriorityPrivilege	3600	wmic.exe
Token: SeCreatePagefilePrivilege	3600	wmic.exe
Token: SeBackupPrivilege	3600	wmic.exe
Token: SeRestorePrivilege	3600	wmic.exe
Token: SeShutdownPrivilege	3600	wmic.exe
Token: SeDebugPrivilege	3600	wmic.exe
Token: SeSystemEnvironmentPrivilege	3600	wmic.exe
Token: SeRemoteShutdownPrivilege	3600	wmic.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2740 wrote to memory of 2472	2740	HWID.exe	82
PID 2740 wrote to memory of 2472	2740	HWID.exe	82
PID 2740 wrote to memory of 2040	2740	HWID.exe	83
PID 2740 wrote to memory of 2040	2740	HWID.exe	83
PID 2040 wrote to memory of 4064	2040	Windows Blue Tooth.exe	84
PID 2040 wrote to memory of 4064	2040	Windows Blue Tooth.exe	84
PID 4460 wrote to memory of 2136	4460	HWID.exe	91
PID 4460 wrote to memory of 2136	4460	HWID.exe	91
PID 4460 wrote to memory of 812	4460	HWID.exe	92
PID 4460 wrote to memory of 812	4460	HWID.exe	92
PID 812 wrote to memory of 3600	812	Windows Blue Tooth.exe	93
PID 812 wrote to memory of 3600	812	Windows Blue Tooth.exe	93

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:2740
- 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:2472
- 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:2040
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:4064

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:1996

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:4460
- C:\Users\Admin\AppData\Local\Temp\Windows sound.exe
  "C:\Users\Admin\AppData\Local\Temp\Windows sound.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2136
- 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:812
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:3600

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\Microsoft\CLR_v4.0\UsageLogs\HWID.exe.log

Filesize
1KB

MD5
529d88befdcb9c82af230a03da30f9d2

SHA1
faafd7f649d768355060daedcef19d0c46bfffbb

SHA256
d4467a14b864014afce828690ec3f85f09cbf661796515c7bcaa9aefac5c0eaa

SHA512
5ca250ab149ce6e88e4e68e95c6bfcf8c43db9cd214325f63b7e520fabc64dd8e6ba75d20108af8308a16956ec131a300d5a99e7221c49daa4aa13755e8f13a1

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Windows Blue Tooth.exe.log

Filesize
1KB

MD5
02df789e3c730b309fc4d9abce5d729b

SHA1
4f9da0f0d4cadacfd0f68fb1f7ee73a66dcf1b4e

SHA256
4afabcd1723096359d90c8f32df7a6a44cd866e89d5b37c89280bfeab61d7321

SHA512
7ac0dd7e3a3e483d07409da793dd2b0915d4369fe41fe743acd82de9aa77b9fa7ea5cd60498034f3fa0674d93d184c9128375d8f7f0796fddecff3845fca8587

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

Filesize
75KB

MD5
cf4187443a0b1f17e74f66723631a822

SHA1
2e17093723097c3729d29d19da3df6d7e18e37be

SHA256
5eed1e22f8d10b33233ff690d9fc10df6e419c7c7d6223230bbd0d8efaa51887

SHA512
2f4865810ad1f291018babd5ec627360d460e29647f6383d0afc6c2f219fd78ddb5113cfa3f27d125d0a59216588805f86b7fa78f3b5f4d45d15192f72d134a7

Download Submit
memory/812-58-0x00007FF9D1860000-0x00007FF9D2322000-memory.dmp

Filesize
10.8MB

Download
memory/812-59-0x000001ACE85B0000-0x000001ACE85C0000-memory.dmp

Filesize
64KB

Download
memory/812-60-0x00007FF9D1860000-0x00007FF9D2322000-memory.dmp

Filesize
10.8MB

Download
memory/2040-25-0x00000209786C0000-0x0000020978700000-memory.dmp

Filesize
256KB

Download
memory/2040-31-0x00007FF9D1860000-0x00007FF9D2322000-memory.dmp

Filesize
10.8MB

Download
memory/2040-33-0x00007FF9D1860000-0x00007FF9D2322000-memory.dmp

Filesize
10.8MB

Download
memory/2040-29-0x000002097A630000-0x000002097A640000-memory.dmp

Filesize
64KB

Download
memory/2136-62-0x00007FF9D1860000-0x00007FF9D2322000-memory.dmp

Filesize
10.8MB

Download
memory/2136-57-0x00007FF9D1860000-0x00007FF9D2322000-memory.dmp

Filesize
10.8MB

Download
memory/2472-27-0x00007FF9D1860000-0x00007FF9D2322000-memory.dmp

Filesize
10.8MB

Download
memory/2472-34-0x000000001AEA0000-0x000000001AEB0000-memory.dmp

Filesize
64KB

Download
memory/2472-39-0x00007FF9D1860000-0x00007FF9D2322000-memory.dmp

Filesize
10.8MB

Download
memory/2472-42-0x000000001AEA0000-0x000000001AEB0000-memory.dmp

Filesize
64KB

Download
memory/2472-28-0x0000000000100000-0x000000000011A000-memory.dmp

Filesize
104KB

Download
memory/2740-0-0x0000000000830000-0x000000000085C000-memory.dmp

Filesize
176KB

Download
memory/2740-30-0x00007FF9D1860000-0x00007FF9D2322000-memory.dmp

Filesize
10.8MB

Download
memory/2740-2-0x000000001B490000-0x000000001B4A0000-memory.dmp

Filesize
64KB

Download
memory/2740-1-0x00007FF9D1860000-0x00007FF9D2322000-memory.dmp

Filesize
10.8MB

Download
memory/4460-54-0x00007FF9D1860000-0x00007FF9D2322000-memory.dmp

Filesize
10.8MB

Download
memory/4460-41-0x00007FF9D1860000-0x00007FF9D2322000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads