umbral | 733edfe6c781586a9b34bad9abccf251970fc8c8bab9664cab831448e637800c

Analysis

max time kernel
148s
max time network
151s
platform
windows11-21h2_x64
resource
win11-20231215-en
resource tags

arch:x64arch:x86image:win11-20231215-enlocale:en-usos:windows11-21h2-x64system
submitted
23-12-2023 18:27

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General

Target

Xworm v5.exe
Size

227KB
MD5

651eadc8d63128936bad4ed36fb3dc4d
SHA1

68098378b68264b898c9e14a9305abb30d9a7dc3
SHA256

733edfe6c781586a9b34bad9abccf251970fc8c8bab9664cab831448e637800c
SHA512

ce417957e4a37a7b41d930689c899708ddb782b968c45f1b19a607b04dfc2dedddd90b4ff04c1b76f8bd36c2991100ddf177a9d4d6e694bb9332a8b1e1e3e1f4
SSDEEP

6144:eloZM9rIkd8g+EtXHkv/iD4ZH9Pp3cw/teHp0AVpSb8e1mqi:IoZOL+EP8ZH9Pp3cw/teHp0AVIk

Score

10^/10

umbral spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/1440-0-0x000002339E3D0000-0x000002339E410000-memory.dmp	family_umbral

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

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	Xworm v5.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102

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

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2904	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4944	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
1368	powershell.exe
1368	powershell.exe
4904	powershell.exe
4904	powershell.exe
2972	powershell.exe
2972	powershell.exe
3968	powershell.exe
3968	powershell.exe
3760	powershell.exe
3760	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1440	Xworm v5.exe
Token: SeDebugPrivilege	1368	powershell.exe
Token: SeDebugPrivilege	4904	powershell.exe
Token: SeDebugPrivilege	2972	powershell.exe
Token: SeDebugPrivilege	3968	powershell.exe
Token: SeIncreaseQuotaPrivilege	1196	wmic.exe
Token: SeSecurityPrivilege	1196	wmic.exe
Token: SeTakeOwnershipPrivilege	1196	wmic.exe
Token: SeLoadDriverPrivilege	1196	wmic.exe
Token: SeSystemProfilePrivilege	1196	wmic.exe
Token: SeSystemtimePrivilege	1196	wmic.exe
Token: SeProfSingleProcessPrivilege	1196	wmic.exe
Token: SeIncBasePriorityPrivilege	1196	wmic.exe
Token: SeCreatePagefilePrivilege	1196	wmic.exe
Token: SeBackupPrivilege	1196	wmic.exe
Token: SeRestorePrivilege	1196	wmic.exe
Token: SeShutdownPrivilege	1196	wmic.exe
Token: SeDebugPrivilege	1196	wmic.exe
Token: SeSystemEnvironmentPrivilege	1196	wmic.exe
Token: SeRemoteShutdownPrivilege	1196	wmic.exe
Token: SeUndockPrivilege	1196	wmic.exe
Token: SeManageVolumePrivilege	1196	wmic.exe
Token: 33	1196	wmic.exe
Token: 34	1196	wmic.exe
Token: 35	1196	wmic.exe
Token: 36	1196	wmic.exe
Token: SeIncreaseQuotaPrivilege	1196	wmic.exe
Token: SeSecurityPrivilege	1196	wmic.exe
Token: SeTakeOwnershipPrivilege	1196	wmic.exe
Token: SeLoadDriverPrivilege	1196	wmic.exe
Token: SeSystemProfilePrivilege	1196	wmic.exe
Token: SeSystemtimePrivilege	1196	wmic.exe
Token: SeProfSingleProcessPrivilege	1196	wmic.exe
Token: SeIncBasePriorityPrivilege	1196	wmic.exe
Token: SeCreatePagefilePrivilege	1196	wmic.exe
Token: SeBackupPrivilege	1196	wmic.exe
Token: SeRestorePrivilege	1196	wmic.exe
Token: SeShutdownPrivilege	1196	wmic.exe
Token: SeDebugPrivilege	1196	wmic.exe
Token: SeSystemEnvironmentPrivilege	1196	wmic.exe
Token: SeRemoteShutdownPrivilege	1196	wmic.exe
Token: SeUndockPrivilege	1196	wmic.exe
Token: SeManageVolumePrivilege	1196	wmic.exe
Token: 33	1196	wmic.exe
Token: 34	1196	wmic.exe
Token: 35	1196	wmic.exe
Token: 36	1196	wmic.exe
Token: SeIncreaseQuotaPrivilege	4880	wmic.exe
Token: SeSecurityPrivilege	4880	wmic.exe
Token: SeTakeOwnershipPrivilege	4880	wmic.exe
Token: SeLoadDriverPrivilege	4880	wmic.exe
Token: SeSystemProfilePrivilege	4880	wmic.exe
Token: SeSystemtimePrivilege	4880	wmic.exe
Token: SeProfSingleProcessPrivilege	4880	wmic.exe
Token: SeIncBasePriorityPrivilege	4880	wmic.exe
Token: SeCreatePagefilePrivilege	4880	wmic.exe
Token: SeBackupPrivilege	4880	wmic.exe
Token: SeRestorePrivilege	4880	wmic.exe
Token: SeShutdownPrivilege	4880	wmic.exe
Token: SeDebugPrivilege	4880	wmic.exe
Token: SeSystemEnvironmentPrivilege	4880	wmic.exe
Token: SeRemoteShutdownPrivilege	4880	wmic.exe
Token: SeUndockPrivilege	4880	wmic.exe
Token: SeManageVolumePrivilege	4880	wmic.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 1440 wrote to memory of 4772	1440	Xworm v5.exe	81
PID 1440 wrote to memory of 4772	1440	Xworm v5.exe	81
PID 1440 wrote to memory of 1368	1440	Xworm v5.exe	85
PID 1440 wrote to memory of 1368	1440	Xworm v5.exe	85
PID 1440 wrote to memory of 4904	1440	Xworm v5.exe	87
PID 1440 wrote to memory of 4904	1440	Xworm v5.exe	87
PID 1440 wrote to memory of 2972	1440	Xworm v5.exe	88
PID 1440 wrote to memory of 2972	1440	Xworm v5.exe	88
PID 1440 wrote to memory of 3968	1440	Xworm v5.exe	91
PID 1440 wrote to memory of 3968	1440	Xworm v5.exe	91
PID 1440 wrote to memory of 1196	1440	Xworm v5.exe	102
PID 1440 wrote to memory of 1196	1440	Xworm v5.exe	102
PID 1440 wrote to memory of 4880	1440	Xworm v5.exe	95
PID 1440 wrote to memory of 4880	1440	Xworm v5.exe	95
PID 1440 wrote to memory of 4844	1440	Xworm v5.exe	101
PID 1440 wrote to memory of 4844	1440	Xworm v5.exe	101
PID 1440 wrote to memory of 3760	1440	Xworm v5.exe	98
PID 1440 wrote to memory of 3760	1440	Xworm v5.exe	98
PID 1440 wrote to memory of 2904	1440	Xworm v5.exe	99
PID 1440 wrote to memory of 2904	1440	Xworm v5.exe	99
PID 1440 wrote to memory of 2820	1440	Xworm v5.exe	103
PID 1440 wrote to memory of 2820	1440	Xworm v5.exe	103
PID 2820 wrote to memory of 4944	2820	cmd.exe	105
PID 2820 wrote to memory of 4944	2820	cmd.exe	105

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4772	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Xworm v5.exe
"C:\Users\Admin\AppData\Local\Temp\Xworm v5.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1440
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Xworm v5.exe"
  2⤵
  - Views/modifies file attributes
  PID:4772
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Xworm v5.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1368
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Set-MpPreference -DisableIntrusionPreventionSystem $true -DisableIOAVProtection $true -DisableRealtimeMonitoring $true -DisableScriptScanning $true -EnableControlledFolderAccess Disabled -EnableNetworkProtection AuditMode -Force -MAPSReporting Disabled -SubmitSamplesConsent NeverSend && powershell Set-MpPreference -SubmitSamplesConsent 2
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4904
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2972
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3968
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4880
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:3760
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2904
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4844
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1196
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Xworm v5.exe" && pause
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2820
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:4944

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

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

Filesize
1KB

MD5
b2f8b5bf54e10ae4d93a2eac002cb497

SHA1
eccc3cd33596075bf413e4249c1f2491b1b2a6c7

SHA256
44e6afcd4b56b7cbc81c4ce55e62b7ae6f8d44948f2b9cc9a6ee9a9adfdce02d

SHA512
58c5911a9b98b94909e627f498f839a55383aa213afd9a837ed1f8543198a79a856baa02373f948bfbb0cfd149e7962e2356cdad6695dc6411840faa09700686

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

Filesize
944B

MD5
e3840d9bcedfe7017e49ee5d05bd1c46

SHA1
272620fb2605bd196df471d62db4b2d280a363c6

SHA256
3ac83e70415b9701ee71a4560232d7998e00c3db020fde669eb01b8821d2746f

SHA512
76adc88ab3930acc6b8b7668e2de797b8c00edcfc41660ee4485259c72a8adf162db62c2621ead5a9950f12bfe8a76ccab79d02fda11860afb0e217812cac376

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

Filesize
948B

MD5
711b161528f4959c4b7463036c7324ec

SHA1
53b30cc796c0dfe0cd4c4406202a19139cb5407d

SHA256
7c077fb04d4911778ab648b657b43c9b464393d734dc7fa029ee0f085c6a5638

SHA512
565d0e3e229894de91ad37a16c261bf380e983ffda750f32e8ad361c0606c62043a0188f45d252fecabc6438bc9e7b2c424b101073162ba9633bacd03b42af9b

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

Filesize
1KB

MD5
7332074ae2b01262736b6fbd9e100dac

SHA1
22f992165065107cc9417fa4117240d84414a13c

SHA256
baea84fda6c1f13090b8cbd91c920848946f10ce155ef31a1df4cd453ee7e4aa

SHA512
4ae6f0e012c31ac1fc2ff4a8877ce2b4667c45b6e651de798318a39a2b6fd39a6f72dffa8b0b89b7a045a27d724d195656faa25a9fec79b22f37ddebb5d22da2

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_2ernt42y.lkx.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1368-15-0x0000022AF1D70000-0x0000022AF1D80000-memory.dmp

Filesize
64KB

Download
memory/1368-13-0x0000022AF1D70000-0x0000022AF1D80000-memory.dmp

Filesize
64KB

Download
memory/1368-12-0x00007FFB39F20000-0x00007FFB3A9E2000-memory.dmp

Filesize
10.8MB

Download
memory/1368-18-0x0000022AF1DC0000-0x0000022AF1F0F000-memory.dmp

Filesize
1.3MB

Download
memory/1368-19-0x00007FFB39F20000-0x00007FFB3A9E2000-memory.dmp

Filesize
10.8MB

Download
memory/1368-14-0x0000022AF1D70000-0x0000022AF1D80000-memory.dmp

Filesize
64KB

Download
memory/1368-11-0x0000022AF1D10000-0x0000022AF1D32000-memory.dmp

Filesize
136KB

Download
memory/1440-112-0x00007FFB39F20000-0x00007FFB3A9E2000-memory.dmp

Filesize
10.8MB

Download
memory/1440-67-0x00000233B8A00000-0x00000233B8A10000-memory.dmp

Filesize
64KB

Download
memory/1440-88-0x00000233A0230000-0x00000233A023A000-memory.dmp

Filesize
40KB

Download
memory/1440-89-0x00000233B8930000-0x00000233B8942000-memory.dmp

Filesize
72KB

Download
memory/1440-2-0x00000233B8A00000-0x00000233B8A10000-memory.dmp

Filesize
64KB

Download
memory/1440-58-0x00007FFB39F20000-0x00007FFB3A9E2000-memory.dmp

Filesize
10.8MB

Download
memory/1440-40-0x00000233B8960000-0x00000233B89B0000-memory.dmp

Filesize
320KB

Download
memory/1440-41-0x00000233A0200000-0x00000233A021E000-memory.dmp

Filesize
120KB

Download
memory/1440-39-0x00000233B8C60000-0x00000233B8CD6000-memory.dmp

Filesize
472KB

Download
memory/1440-0-0x000002339E3D0000-0x000002339E410000-memory.dmp

Filesize
256KB

Download
memory/1440-1-0x00007FFB39F20000-0x00007FFB3A9E2000-memory.dmp

Filesize
10.8MB

Download
memory/2972-42-0x00007FFB39F20000-0x00007FFB3A9E2000-memory.dmp

Filesize
10.8MB

Download
memory/2972-70-0x00007FFB39F20000-0x00007FFB3A9E2000-memory.dmp

Filesize
10.8MB

Download
memory/2972-65-0x00000147E19A0000-0x00000147E19B0000-memory.dmp

Filesize
64KB

Download
memory/2972-63-0x00000147E19A0000-0x00000147E19B0000-memory.dmp

Filesize
64KB

Download
memory/2972-69-0x00000147F9F30000-0x00000147FA07F000-memory.dmp

Filesize
1.3MB

Download
memory/3760-106-0x00000216B3DA0000-0x00000216B3EEF000-memory.dmp

Filesize
1.3MB

Download
memory/3760-103-0x00000216B3C90000-0x00000216B3CA0000-memory.dmp

Filesize
64KB

Download
memory/3760-101-0x00007FFB39F20000-0x00007FFB3A9E2000-memory.dmp

Filesize
10.8MB

Download
memory/3760-102-0x00000216B3C90000-0x00000216B3CA0000-memory.dmp

Filesize
64KB

Download
memory/3760-104-0x00000216B3C90000-0x00000216B3CA0000-memory.dmp

Filesize
64KB

Download
memory/3760-107-0x00007FFB39F20000-0x00007FFB3A9E2000-memory.dmp

Filesize
10.8MB

Download
memory/3968-85-0x00000245313B0000-0x00000245314FF000-memory.dmp

Filesize
1.3MB

Download
memory/3968-86-0x00007FFB39F20000-0x00007FFB3A9E2000-memory.dmp

Filesize
10.8MB

Download
memory/3968-83-0x0000024531360000-0x0000024531370000-memory.dmp

Filesize
64KB

Download
memory/3968-82-0x0000024531360000-0x0000024531370000-memory.dmp

Filesize
64KB

Download
memory/3968-79-0x00007FFB39F20000-0x00007FFB3A9E2000-memory.dmp

Filesize
10.8MB

Download
memory/3968-80-0x0000024531360000-0x0000024531370000-memory.dmp

Filesize
64KB

Download
memory/4904-30-0x00000254EF900000-0x00000254EF910000-memory.dmp

Filesize
64KB

Download
memory/4904-31-0x00000254EF900000-0x00000254EF910000-memory.dmp

Filesize
64KB

Download
memory/4904-36-0x00007FFB39F20000-0x00007FFB3A9E2000-memory.dmp

Filesize
10.8MB

Download
memory/4904-35-0x00000254EF910000-0x00000254EFA5F000-memory.dmp

Filesize
1.3MB

Download
memory/4904-33-0x00000254EF900000-0x00000254EF910000-memory.dmp

Filesize
64KB

Download
memory/4904-29-0x00007FFB39F20000-0x00007FFB3A9E2000-memory.dmp

Filesize
10.8MB

Download