umbral | ea4cb7c7b4cfb2fcc04d1c3f96b20c26638e69a97b15cae14659f0d6afb78f85

Analysis

max time kernel
94s
max time network
95s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
05-08-2024 16:21

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General

Target

b5uEJHZB6Rl.exe
Size

231KB
MD5

438289fb9c72ed39bf5497f9af21ec7a
SHA1

8120391ecb41ed6a4c6ef0b259776e59311d6997
SHA256

ea4cb7c7b4cfb2fcc04d1c3f96b20c26638e69a97b15cae14659f0d6afb78f85
SHA512

3647907fa2d503a242ef07cb20b081444b75e0c618a91232c8e77903b4b6aa823b8a7cbe07a45e02591fe48fdd23b5eae88565006b85863c0a5f6e42d7589fe0
SSDEEP

6144:YloZM+rIkd8g+EtXHkv/iD4Bs4DdLocD/abtIEx6tb8e1mTiu:GoZtL+EP8Bs4DdLocD/abtIExq1

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/2060-0-0x0000013644670000-0x00000136446B0000-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
2468	powershell.exe
3440	powershell.exe
4692	powershell.exe
4664	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	b5uEJHZB6Rl.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
20	discord.com
21	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
5	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
3808	cmd.exe
4440	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
396	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4440	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
2060	b5uEJHZB6Rl.exe
4664	powershell.exe
4664	powershell.exe
2468	powershell.exe
2468	powershell.exe
3440	powershell.exe
3440	powershell.exe
2704	powershell.exe
2704	powershell.exe
4692	powershell.exe
4692	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2060	b5uEJHZB6Rl.exe
Token: SeIncreaseQuotaPrivilege	2696	wmic.exe
Token: SeSecurityPrivilege	2696	wmic.exe
Token: SeTakeOwnershipPrivilege	2696	wmic.exe
Token: SeLoadDriverPrivilege	2696	wmic.exe
Token: SeSystemProfilePrivilege	2696	wmic.exe
Token: SeSystemtimePrivilege	2696	wmic.exe
Token: SeProfSingleProcessPrivilege	2696	wmic.exe
Token: SeIncBasePriorityPrivilege	2696	wmic.exe
Token: SeCreatePagefilePrivilege	2696	wmic.exe
Token: SeBackupPrivilege	2696	wmic.exe
Token: SeRestorePrivilege	2696	wmic.exe
Token: SeShutdownPrivilege	2696	wmic.exe
Token: SeDebugPrivilege	2696	wmic.exe
Token: SeSystemEnvironmentPrivilege	2696	wmic.exe
Token: SeRemoteShutdownPrivilege	2696	wmic.exe
Token: SeUndockPrivilege	2696	wmic.exe
Token: SeManageVolumePrivilege	2696	wmic.exe
Token: 33	2696	wmic.exe
Token: 34	2696	wmic.exe
Token: 35	2696	wmic.exe
Token: 36	2696	wmic.exe
Token: SeIncreaseQuotaPrivilege	2696	wmic.exe
Token: SeSecurityPrivilege	2696	wmic.exe
Token: SeTakeOwnershipPrivilege	2696	wmic.exe
Token: SeLoadDriverPrivilege	2696	wmic.exe
Token: SeSystemProfilePrivilege	2696	wmic.exe
Token: SeSystemtimePrivilege	2696	wmic.exe
Token: SeProfSingleProcessPrivilege	2696	wmic.exe
Token: SeIncBasePriorityPrivilege	2696	wmic.exe
Token: SeCreatePagefilePrivilege	2696	wmic.exe
Token: SeBackupPrivilege	2696	wmic.exe
Token: SeRestorePrivilege	2696	wmic.exe
Token: SeShutdownPrivilege	2696	wmic.exe
Token: SeDebugPrivilege	2696	wmic.exe
Token: SeSystemEnvironmentPrivilege	2696	wmic.exe
Token: SeRemoteShutdownPrivilege	2696	wmic.exe
Token: SeUndockPrivilege	2696	wmic.exe
Token: SeManageVolumePrivilege	2696	wmic.exe
Token: 33	2696	wmic.exe
Token: 34	2696	wmic.exe
Token: 35	2696	wmic.exe
Token: 36	2696	wmic.exe
Token: SeDebugPrivilege	4664	powershell.exe
Token: SeDebugPrivilege	2468	powershell.exe
Token: SeDebugPrivilege	3440	powershell.exe
Token: SeDebugPrivilege	2704	powershell.exe
Token: SeIncreaseQuotaPrivilege	2252	wmic.exe
Token: SeSecurityPrivilege	2252	wmic.exe
Token: SeTakeOwnershipPrivilege	2252	wmic.exe
Token: SeLoadDriverPrivilege	2252	wmic.exe
Token: SeSystemProfilePrivilege	2252	wmic.exe
Token: SeSystemtimePrivilege	2252	wmic.exe
Token: SeProfSingleProcessPrivilege	2252	wmic.exe
Token: SeIncBasePriorityPrivilege	2252	wmic.exe
Token: SeCreatePagefilePrivilege	2252	wmic.exe
Token: SeBackupPrivilege	2252	wmic.exe
Token: SeRestorePrivilege	2252	wmic.exe
Token: SeShutdownPrivilege	2252	wmic.exe
Token: SeDebugPrivilege	2252	wmic.exe
Token: SeSystemEnvironmentPrivilege	2252	wmic.exe
Token: SeRemoteShutdownPrivilege	2252	wmic.exe
Token: SeUndockPrivilege	2252	wmic.exe
Token: SeManageVolumePrivilege	2252	wmic.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2060 wrote to memory of 2696	2060	b5uEJHZB6Rl.exe	86
PID 2060 wrote to memory of 2696	2060	b5uEJHZB6Rl.exe	86
PID 2060 wrote to memory of 2220	2060	b5uEJHZB6Rl.exe	89
PID 2060 wrote to memory of 2220	2060	b5uEJHZB6Rl.exe	89
PID 2060 wrote to memory of 4664	2060	b5uEJHZB6Rl.exe	91
PID 2060 wrote to memory of 4664	2060	b5uEJHZB6Rl.exe	91
PID 2060 wrote to memory of 2468	2060	b5uEJHZB6Rl.exe	93
PID 2060 wrote to memory of 2468	2060	b5uEJHZB6Rl.exe	93
PID 2060 wrote to memory of 3440	2060	b5uEJHZB6Rl.exe	95
PID 2060 wrote to memory of 3440	2060	b5uEJHZB6Rl.exe	95
PID 2060 wrote to memory of 2704	2060	b5uEJHZB6Rl.exe	97
PID 2060 wrote to memory of 2704	2060	b5uEJHZB6Rl.exe	97
PID 2060 wrote to memory of 2252	2060	b5uEJHZB6Rl.exe	99
PID 2060 wrote to memory of 2252	2060	b5uEJHZB6Rl.exe	99
PID 2060 wrote to memory of 2708	2060	b5uEJHZB6Rl.exe	101
PID 2060 wrote to memory of 2708	2060	b5uEJHZB6Rl.exe	101
PID 2060 wrote to memory of 5088	2060	b5uEJHZB6Rl.exe	103
PID 2060 wrote to memory of 5088	2060	b5uEJHZB6Rl.exe	103
PID 2060 wrote to memory of 4692	2060	b5uEJHZB6Rl.exe	105
PID 2060 wrote to memory of 4692	2060	b5uEJHZB6Rl.exe	105
PID 2060 wrote to memory of 396	2060	b5uEJHZB6Rl.exe	107
PID 2060 wrote to memory of 396	2060	b5uEJHZB6Rl.exe	107
PID 2060 wrote to memory of 3808	2060	b5uEJHZB6Rl.exe	109
PID 2060 wrote to memory of 3808	2060	b5uEJHZB6Rl.exe	109

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2220	attrib.exe

C:\Users\Admin\AppData\Local\Temp\b5uEJHZB6Rl.exe
"C:\Users\Admin\AppData\Local\Temp\b5uEJHZB6Rl.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2060
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2696
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\b5uEJHZB6Rl.exe"
  2⤵
  - Views/modifies file attributes
  PID:2220
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\b5uEJHZB6Rl.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4664
- 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:2468
- 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:3440
- 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:2704
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2252
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2708
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:5088
- 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:4692
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:396
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\b5uEJHZB6Rl.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  PID:3808
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:4440

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
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
948B

MD5
0b8cb2e6dd5794b6a56a4bdbbd430fd7

SHA1
2b08e348c3489c6a35761af073018e3784c12074

SHA256
bcce0d44e33747e4c39df9afbd0a4e98a47ded0188375e4dfdd94cafbb366e1f

SHA512
15ce3b588aa80899f69b0313c7e188d886bddbd09783ca732ac33f9ae8e4e017a72b6f98919f581383a4582732575e5faedb0dea87e01cf2b657424945fdf4d2

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

Filesize
1KB

MD5
4950bb37b35849b09a86bc7c01c8952a

SHA1
f9650f41d105d3affa7b19d58ab336a92aab4793

SHA256
5d139a221345fe53f28d2a772c8e4c8e988925b6fc228c81baa98f824a44c67c

SHA512
5b39b845d6d53acd9a20fa1e3e081f7a4c5bbea4641ed53e6d1df8fb245a57e7a659cbdbdfe41ce642b6b2a7ff98b3dd3c9a5bcea7d226cead546d097f361a40

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

Filesize
1KB

MD5
14096fbe470a190011f31dba4c4307ae

SHA1
83e2c46b3e1c14779d7aea8497ad802fbc89d01e

SHA256
8b66640600b8c05b4af2c978d3bdb778ddc2f835ea65297e6d9e9e060a256f39

SHA512
1687e378b3c0e92a30018f40092546c5cbfa38a5b5371d424834fd5c5cd02ebd52901f189385661e624a05e4ecb54f12841f970afae6e92a53da9551d95a3f75

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1zcvyvhj.lsl.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2060-71-0x0000013644B80000-0x0000013644B8A000-memory.dmp

Filesize
40KB

Download
memory/2060-35-0x0000013644AE0000-0x0000013644AFE000-memory.dmp

Filesize
120KB

Download
memory/2060-90-0x00007FFBED670000-0x00007FFBEE131000-memory.dmp

Filesize
10.8MB

Download
memory/2060-72-0x0000013644BD0000-0x0000013644BE2000-memory.dmp

Filesize
72KB

Download
memory/2060-2-0x00007FFBED670000-0x00007FFBEE131000-memory.dmp

Filesize
10.8MB

Download
memory/2060-33-0x000001365EC10000-0x000001365EC86000-memory.dmp

Filesize
472KB

Download
memory/2060-34-0x0000013644C00000-0x0000013644C50000-memory.dmp

Filesize
320KB

Download
memory/2060-0-0x0000013644670000-0x00000136446B0000-memory.dmp

Filesize
256KB

Download
memory/2060-1-0x00007FFBED673000-0x00007FFBED675000-memory.dmp

Filesize
8KB

Download
memory/4664-15-0x00007FFBED670000-0x00007FFBEE131000-memory.dmp

Filesize
10.8MB

Download
memory/4664-3-0x0000018F5A220000-0x0000018F5A242000-memory.dmp

Filesize
136KB

Download
memory/4664-14-0x00007FFBED670000-0x00007FFBEE131000-memory.dmp

Filesize
10.8MB

Download
memory/4664-13-0x00007FFBED670000-0x00007FFBEE131000-memory.dmp

Filesize
10.8MB

Download
memory/4664-18-0x00007FFBED670000-0x00007FFBEE131000-memory.dmp

Filesize
10.8MB

Download