umbral | b34cce587000413f4f48699964dbf1cfcbb2718f0c7749196e1caf154743702d

Analysis

max time kernel
133s
max time network
137s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
29-08-2024 15:09

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General

Target

123.exe
Size

484KB
MD5

2aa4f648d160439b834046fc7eaf4db3
SHA1

7b0da6b64838ea63766e628893b8a08acff406f7
SHA256

b34cce587000413f4f48699964dbf1cfcbb2718f0c7749196e1caf154743702d
SHA512

d12de3fa54f2bfa81498c1301d957793095869d334d09dffe5be429e92bc2e064ad4a025da643164a25a499fa26ded267e08f847ce8c6b6b0a4242083d42e75e
SSDEEP

12288:soZrL+EP8e/WB1DA0rgSjVg8ZWVo8kYFNLQd2nLyNz67:yI8wWB1DA0rgSjVg8ZW95MILyM7

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/5044-1-0x000002005CFD0000-0x000002005D050000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2292	powershell.exe
808	powershell.exe
1404	powershell.exe
2232	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	123.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 2 IoCs

Web Service

T1102

flow	ioc
6	discord.com
7	discord.com

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
4	ip-api.com

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
596	cmd.exe
1996	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
516	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1996	PING.EXE

Suspicious behavior: EnumeratesProcesses 15 IoCs

pid	Process
2232	powershell.exe
2232	powershell.exe
2232	powershell.exe
2292	powershell.exe
2292	powershell.exe
2292	powershell.exe
808	powershell.exe
808	powershell.exe
808	powershell.exe
756	powershell.exe
756	powershell.exe
756	powershell.exe
1404	powershell.exe
1404	powershell.exe
1404	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	5044	123.exe
Token: SeDebugPrivilege	2232	powershell.exe
Token: SeIncreaseQuotaPrivilege	2232	powershell.exe
Token: SeSecurityPrivilege	2232	powershell.exe
Token: SeTakeOwnershipPrivilege	2232	powershell.exe
Token: SeLoadDriverPrivilege	2232	powershell.exe
Token: SeSystemProfilePrivilege	2232	powershell.exe
Token: SeSystemtimePrivilege	2232	powershell.exe
Token: SeProfSingleProcessPrivilege	2232	powershell.exe
Token: SeIncBasePriorityPrivilege	2232	powershell.exe
Token: SeCreatePagefilePrivilege	2232	powershell.exe
Token: SeBackupPrivilege	2232	powershell.exe
Token: SeRestorePrivilege	2232	powershell.exe
Token: SeShutdownPrivilege	2232	powershell.exe
Token: SeDebugPrivilege	2232	powershell.exe
Token: SeSystemEnvironmentPrivilege	2232	powershell.exe
Token: SeRemoteShutdownPrivilege	2232	powershell.exe
Token: SeUndockPrivilege	2232	powershell.exe
Token: SeManageVolumePrivilege	2232	powershell.exe
Token: 33	2232	powershell.exe
Token: 34	2232	powershell.exe
Token: 35	2232	powershell.exe
Token: 36	2232	powershell.exe
Token: SeDebugPrivilege	2292	powershell.exe
Token: SeDebugPrivilege	808	powershell.exe
Token: SeDebugPrivilege	756	powershell.exe
Token: SeIncreaseQuotaPrivilege	820	wmic.exe
Token: SeSecurityPrivilege	820	wmic.exe
Token: SeTakeOwnershipPrivilege	820	wmic.exe
Token: SeLoadDriverPrivilege	820	wmic.exe
Token: SeSystemProfilePrivilege	820	wmic.exe
Token: SeSystemtimePrivilege	820	wmic.exe
Token: SeProfSingleProcessPrivilege	820	wmic.exe
Token: SeIncBasePriorityPrivilege	820	wmic.exe
Token: SeCreatePagefilePrivilege	820	wmic.exe
Token: SeBackupPrivilege	820	wmic.exe
Token: SeRestorePrivilege	820	wmic.exe
Token: SeShutdownPrivilege	820	wmic.exe
Token: SeDebugPrivilege	820	wmic.exe
Token: SeSystemEnvironmentPrivilege	820	wmic.exe
Token: SeRemoteShutdownPrivilege	820	wmic.exe
Token: SeUndockPrivilege	820	wmic.exe
Token: SeManageVolumePrivilege	820	wmic.exe
Token: 33	820	wmic.exe
Token: 34	820	wmic.exe
Token: 35	820	wmic.exe
Token: 36	820	wmic.exe
Token: SeIncreaseQuotaPrivilege	820	wmic.exe
Token: SeSecurityPrivilege	820	wmic.exe
Token: SeTakeOwnershipPrivilege	820	wmic.exe
Token: SeLoadDriverPrivilege	820	wmic.exe
Token: SeSystemProfilePrivilege	820	wmic.exe
Token: SeSystemtimePrivilege	820	wmic.exe
Token: SeProfSingleProcessPrivilege	820	wmic.exe
Token: SeIncBasePriorityPrivilege	820	wmic.exe
Token: SeCreatePagefilePrivilege	820	wmic.exe
Token: SeBackupPrivilege	820	wmic.exe
Token: SeRestorePrivilege	820	wmic.exe
Token: SeShutdownPrivilege	820	wmic.exe
Token: SeDebugPrivilege	820	wmic.exe
Token: SeSystemEnvironmentPrivilege	820	wmic.exe
Token: SeRemoteShutdownPrivilege	820	wmic.exe
Token: SeUndockPrivilege	820	wmic.exe
Token: SeManageVolumePrivilege	820	wmic.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 5044 wrote to memory of 3424	5044	123.exe	75
PID 5044 wrote to memory of 3424	5044	123.exe	75
PID 5044 wrote to memory of 2232	5044	123.exe	77
PID 5044 wrote to memory of 2232	5044	123.exe	77
PID 5044 wrote to memory of 2292	5044	123.exe	80
PID 5044 wrote to memory of 2292	5044	123.exe	80
PID 5044 wrote to memory of 808	5044	123.exe	82
PID 5044 wrote to memory of 808	5044	123.exe	82
PID 5044 wrote to memory of 756	5044	123.exe	84
PID 5044 wrote to memory of 756	5044	123.exe	84
PID 5044 wrote to memory of 820	5044	123.exe	86
PID 5044 wrote to memory of 820	5044	123.exe	86
PID 5044 wrote to memory of 2040	5044	123.exe	89
PID 5044 wrote to memory of 2040	5044	123.exe	89
PID 5044 wrote to memory of 2704	5044	123.exe	91
PID 5044 wrote to memory of 2704	5044	123.exe	91
PID 5044 wrote to memory of 1404	5044	123.exe	93
PID 5044 wrote to memory of 1404	5044	123.exe	93
PID 5044 wrote to memory of 516	5044	123.exe	95
PID 5044 wrote to memory of 516	5044	123.exe	95
PID 5044 wrote to memory of 596	5044	123.exe	97
PID 5044 wrote to memory of 596	5044	123.exe	97
PID 596 wrote to memory of 1996	596	cmd.exe	99
PID 596 wrote to memory of 1996	596	cmd.exe	99

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3424	attrib.exe

C:\Users\Admin\AppData\Local\Temp\123.exe
"C:\Users\Admin\AppData\Local\Temp\123.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5044
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\123.exe"
  2⤵
  - Views/modifies file attributes
  PID:3424
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\123.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2232
- 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⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2292
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:808
- 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:756
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:820
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2040
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2704
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  PID:1404
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:516
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\123.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:596
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1996

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

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

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

Filesize
3KB

MD5
ad5cd538ca58cb28ede39c108acb5785

SHA1
1ae910026f3dbe90ed025e9e96ead2b5399be877

SHA256
c9e6cb04d6c893458d5a7e12eb575cf97c3172f5e312b1f63a667cbbc5f0c033

SHA512
c066c5d9b276a68fa636647bb29aea05bfa2292217bc77f5324d9c1d93117772ee8277e1f7cff91ec8d6b7c05ca078f929cecfdbb09582522a9067f54740af13

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

Filesize
1KB

MD5
a294c94cdaa304e277fe4e4ffd16349b

SHA1
ead4bd6da3cf9f0a9aa63dd14e6cbbe4b0d0325b

SHA256
0d02609124e0ca587127ff9fa0da729ba840a24b66613bb192fca99c99b0ebdb

SHA512
09f102aa0e5696fe086a4a1301ff1b8c7d8969b3453b3f591bedc238a70de27db3e8d5e50297286679053bbde0d8f653fa20d2be6668130d16b94f7fa342b5d4

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

Filesize
1KB

MD5
831fed81f8898fe54bc153fb894eccde

SHA1
140b30165764dcb22b39da802709bea791df4dcc

SHA256
2c9c0a9234c54fb64aa5a2918d6dcec8178d5e157758c0fd7beefc9fce1b154e

SHA512
8289b7525a6aab89297e10424e1067563221d677340c97a912e9784365906a09df0d92fe2e52867bba79fd13fadf1928aca1633f07ff0d2c461caffe0ae4bdba

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

Filesize
1KB

MD5
1b050b49439133096189d68822f73cd8

SHA1
3e4ff7c4eff6f27434928afa7f14ce549b1d26cb

SHA256
d28746e5d7cdfca307f6fe45b3507af74a2af6c4f4e51d28a987d097679a9ac7

SHA512
e608456d524763612c1cbc041812c8108e7f2fefcc80bf3743cd17aaa90e28c64b050d963eaa802d90eff7c8e1b53bc57bc6974e99196b87a671a86f1fb57c88

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

Filesize
1KB

MD5
bbbd65450331d5bf1a3e49920095af49

SHA1
86a55c101a709072a21b5da3e5683d5ad916dc4d

SHA256
23ab7c72ea311234b524087a8e874b919061bd126d2cd06db59b681fd06a4010

SHA512
d5f312e720b3d7977c50d76e8bc7458ce89d7382f57622712d2116d7a7b7a5aa63b1cd34226227c291f1f9e532b1f275e30a57027cfd191c7779c21c0fdc5c82

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_cwwvflfb.5yr.ps1

Filesize
1B

MD5
c4ca4238a0b923820dcc509a6f75849b

SHA1
356a192b7913b04c54574d18c28d46e6395428ab

SHA256
6b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b

SHA512
4dff4ea340f0a823f15d3f4f01ab62eae0e5da579ccb851f8db9dfe84c58b2b37b89903a740e1ee172da793a6e79d560e5f7f9bd058a12a280433ed6fa46510a

Download Submit
memory/2232-13-0x00007FFCAE010000-0x00007FFCAE9FC000-memory.dmp

Filesize
9.9MB

Download
memory/2232-12-0x0000014BA6500000-0x0000014BA6576000-memory.dmp

Filesize
472KB

Download
memory/2232-8-0x00007FFCAE010000-0x00007FFCAE9FC000-memory.dmp

Filesize
9.9MB

Download
memory/2232-26-0x00007FFCAE010000-0x00007FFCAE9FC000-memory.dmp

Filesize
9.9MB

Download
memory/2232-52-0x00007FFCAE010000-0x00007FFCAE9FC000-memory.dmp

Filesize
9.9MB

Download
memory/2232-53-0x00007FFCAE010000-0x00007FFCAE9FC000-memory.dmp

Filesize
9.9MB

Download
memory/2232-10-0x00007FFCAE010000-0x00007FFCAE9FC000-memory.dmp

Filesize
9.9MB

Download
memory/2232-7-0x0000014BA6350000-0x0000014BA6372000-memory.dmp

Filesize
136KB

Download
memory/5044-86-0x0000020077730000-0x000002007774E000-memory.dmp

Filesize
120KB

Download
memory/5044-85-0x00000200776E0000-0x0000020077730000-memory.dmp

Filesize
320KB

Download
memory/5044-1-0x000002005CFD0000-0x000002005D050000-memory.dmp

Filesize
512KB

Download
memory/5044-2-0x00007FFCAE010000-0x00007FFCAE9FC000-memory.dmp

Filesize
9.9MB

Download
memory/5044-150-0x0000020077570000-0x000002007757A000-memory.dmp

Filesize
40KB

Download
memory/5044-151-0x00000200775A0000-0x00000200775B2000-memory.dmp

Filesize
72KB

Download
memory/5044-0-0x00007FFCAE013000-0x00007FFCAE014000-memory.dmp

Filesize
4KB

Download
memory/5044-178-0x00007FFCAE013000-0x00007FFCAE014000-memory.dmp

Filesize
4KB

Download
memory/5044-179-0x00007FFCAE010000-0x00007FFCAE9FC000-memory.dmp

Filesize
9.9MB

Download
memory/5044-183-0x00007FFCAE010000-0x00007FFCAE9FC000-memory.dmp

Filesize
9.9MB

Download