umbral | bfa63de5ca4b0e7b032572781b333bbb802853254178c407ea2f0ae9ed163992

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
28-10-2024 03:10

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General

Target

DisconnectLoader.exe
Size

299KB
MD5

6f707167a736591abbb6a453091d603a
SHA1

1daae281747491ef077374692bd36e2295b6c77a
SHA256

bfa63de5ca4b0e7b032572781b333bbb802853254178c407ea2f0ae9ed163992
SHA512

2e49078c2b788fa224c774a5ea8388705d768a0945de7f287f5c148a71739020dd5c247499d367ef391e8e35e3ee9339ebee3a0c1612ff652c04b02a68fc3268
SSDEEP

3072:9ufodFK9MuOjio2QAsSdADRq6ty71wtYM77ldY7AXTp2kA3:9rK9BouwH77Ppj0kA

Score

10^/10

umbral xworm execution rat stealer trojan

Malware Config

Extracted

Family

xworm

Version

5.0

dane1c-58098.portmap.host:58098

Mutex

DOcpdWUo2HOyFJzB

Attributes

Install_directory
%LocalAppData%
install_file
USB.exe

aes.plain

Signatures

Detect Umbral payload 2 IoCs

resource	yara_rule
behavioral1/files/0x000f000000023b64-61.dat	family_umbral
behavioral1/memory/2676-68-0x0000019DEE010000-0x0000019DEE092000-memory.dmp	family_umbral

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/432-1-0x0000000000650000-0x00000000006A2000-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
1508	powershell.exe
4912	powershell.exe
3924	powershell.exe
2220	powershell.exe

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-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	DisconnectLoader.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
2676	ggeeyr.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
49	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 8 IoCs

pid	Process
1508	powershell.exe
1508	powershell.exe
4912	powershell.exe
4912	powershell.exe
3924	powershell.exe
3924	powershell.exe
2220	powershell.exe
2220	powershell.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	432	DisconnectLoader.exe
Token: SeDebugPrivilege	1508	powershell.exe
Token: SeDebugPrivilege	4912	powershell.exe
Token: SeDebugPrivilege	3924	powershell.exe
Token: SeDebugPrivilege	2220	powershell.exe
Token: SeDebugPrivilege	2676	ggeeyr.exe
Token: SeIncreaseQuotaPrivilege	4308	wmic.exe
Token: SeSecurityPrivilege	4308	wmic.exe
Token: SeTakeOwnershipPrivilege	4308	wmic.exe
Token: SeLoadDriverPrivilege	4308	wmic.exe
Token: SeSystemProfilePrivilege	4308	wmic.exe
Token: SeSystemtimePrivilege	4308	wmic.exe
Token: SeProfSingleProcessPrivilege	4308	wmic.exe
Token: SeIncBasePriorityPrivilege	4308	wmic.exe
Token: SeCreatePagefilePrivilege	4308	wmic.exe
Token: SeBackupPrivilege	4308	wmic.exe
Token: SeRestorePrivilege	4308	wmic.exe
Token: SeShutdownPrivilege	4308	wmic.exe
Token: SeDebugPrivilege	4308	wmic.exe
Token: SeSystemEnvironmentPrivilege	4308	wmic.exe
Token: SeRemoteShutdownPrivilege	4308	wmic.exe
Token: SeUndockPrivilege	4308	wmic.exe
Token: SeManageVolumePrivilege	4308	wmic.exe
Token: 33	4308	wmic.exe
Token: 34	4308	wmic.exe
Token: 35	4308	wmic.exe
Token: 36	4308	wmic.exe
Token: SeIncreaseQuotaPrivilege	4308	wmic.exe
Token: SeSecurityPrivilege	4308	wmic.exe
Token: SeTakeOwnershipPrivilege	4308	wmic.exe
Token: SeLoadDriverPrivilege	4308	wmic.exe
Token: SeSystemProfilePrivilege	4308	wmic.exe
Token: SeSystemtimePrivilege	4308	wmic.exe
Token: SeProfSingleProcessPrivilege	4308	wmic.exe
Token: SeIncBasePriorityPrivilege	4308	wmic.exe
Token: SeCreatePagefilePrivilege	4308	wmic.exe
Token: SeBackupPrivilege	4308	wmic.exe
Token: SeRestorePrivilege	4308	wmic.exe
Token: SeShutdownPrivilege	4308	wmic.exe
Token: SeDebugPrivilege	4308	wmic.exe
Token: SeSystemEnvironmentPrivilege	4308	wmic.exe
Token: SeRemoteShutdownPrivilege	4308	wmic.exe
Token: SeUndockPrivilege	4308	wmic.exe
Token: SeManageVolumePrivilege	4308	wmic.exe
Token: 33	4308	wmic.exe
Token: 34	4308	wmic.exe
Token: 35	4308	wmic.exe
Token: 36	4308	wmic.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 432 wrote to memory of 1508	432	DisconnectLoader.exe	90
PID 432 wrote to memory of 1508	432	DisconnectLoader.exe	90
PID 432 wrote to memory of 4912	432	DisconnectLoader.exe	94
PID 432 wrote to memory of 4912	432	DisconnectLoader.exe	94
PID 432 wrote to memory of 3924	432	DisconnectLoader.exe	96
PID 432 wrote to memory of 3924	432	DisconnectLoader.exe	96
PID 432 wrote to memory of 2220	432	DisconnectLoader.exe	98
PID 432 wrote to memory of 2220	432	DisconnectLoader.exe	98
PID 432 wrote to memory of 2676	432	DisconnectLoader.exe	107
PID 432 wrote to memory of 2676	432	DisconnectLoader.exe	107
PID 2676 wrote to memory of 4308	2676	ggeeyr.exe	108
PID 2676 wrote to memory of 4308	2676	ggeeyr.exe	108

C:\Users\Admin\AppData\Local\Temp\DisconnectLoader.exe
"C:\Users\Admin\AppData\Local\Temp\DisconnectLoader.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:432
- 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\Local\Temp\DisconnectLoader.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1508
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'DisconnectLoader.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4912
- 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\Local\DisconnectCheats'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3924
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'DisconnectCheats'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2220
- C:\Users\Admin\AppData\Local\Temp\ggeeyr.exe
  "C:\Users\Admin\AppData\Local\Temp\ggeeyr.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2676
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:4308

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

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\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
3072fa0040b347c3941144486bf30c6f

SHA1
e6dc84a5bd882198583653592f17af1bf8cbfc68

SHA256
da8b533f81b342503c109e46b081b5c5296fdad5481f93fe5cc648e49ca6238e

SHA512
62df0eed621fe8ec340887a03d26b125429025c14ddcdfef82cb78ce1c9c6110c1d51ff0e423754d7966b6251363bf92833970eaf67707f8dd62e1549a79536c

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

Filesize
944B

MD5
60945d1a2e48da37d4ce8d9c56b6845a

SHA1
83e80a6acbeb44b68b0da00b139471f428a9d6c1

SHA256
314b91c00997034d6e015f40230d90ebbf57de5dc938b62c1a214d591793dbe3

SHA512
5d068f1d6443e26ae3cad1c80f969e50e5860967b314153c4d3b6efd1cfa39f0907c6427bec7fa43db079f258b6357e4e9a1b0b1a36b1481d2049ea0e67909ed

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_mtypqvwa.1ks.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
494KB

MD5
9acedc998c158061ad2c879a06180f04

SHA1
a63da527ee19282336e3f4b534f26c15a74d22b8

SHA256
d68d102b3363895c36ff736b1b663b7157ab3d583277c9831a9aacdea8a81c9f

SHA512
2c2d4fab20a6ca19656244efb2d94837e8f56333ec591aeac99d09ec63c400928406346173b93bf9146c697fccfa868f14a6435450a5c7ceadfcef8d7cae8fd6

Download Submit
memory/432-55-0x00007FFD9DB90000-0x00007FFD9DD85000-memory.dmp

Filesize
2.0MB

Download
memory/432-0-0x00007FFD9DB90000-0x00007FFD9DD85000-memory.dmp

Filesize
2.0MB

Download
memory/432-56-0x00007FFD9DB90000-0x00007FFD9DD85000-memory.dmp

Filesize
2.0MB

Download
memory/432-1-0x0000000000650000-0x00000000006A2000-memory.dmp

Filesize
328KB

Download
memory/432-71-0x000000001B330000-0x000000001B33C000-memory.dmp

Filesize
48KB

Download
memory/1508-17-0x00007FFD9DB90000-0x00007FFD9DD85000-memory.dmp

Filesize
2.0MB

Download
memory/1508-10-0x000002B4D55E0000-0x000002B4D5602000-memory.dmp

Filesize
136KB

Download
memory/1508-3-0x00007FFD9DB90000-0x00007FFD9DD85000-memory.dmp

Filesize
2.0MB

Download
memory/1508-4-0x00007FFD9DB90000-0x00007FFD9DD85000-memory.dmp

Filesize
2.0MB

Download
memory/1508-2-0x00007FFD9DB90000-0x00007FFD9DD85000-memory.dmp

Filesize
2.0MB

Download
memory/2676-68-0x0000019DEE010000-0x0000019DEE092000-memory.dmp

Filesize
520KB

Download