lumma | db6cea7e8d62d3b21efe3b423b48c131e345cb55f168cbe1f142e491bb812747

Analysis

max time kernel
147s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
06-05-2024 18:19

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General

Target

Kobalc.exe
Size

185KB
MD5

15717cd327a723820d71900611545917
SHA1

99184ec149d329e98cd3e600cfaba22a2f9a0156
SHA256

db6cea7e8d62d3b21efe3b423b48c131e345cb55f168cbe1f142e491bb812747
SHA512

a0de435db809e3e79f89411017e244c76145e010c67f894d41e265804c832f5514ac2f31cc9a0c667afa77aaaf3eccecac148279ca5a0feba492b222d5481a49
SSDEEP

3072:LoixrduqW9Goin4lZoD9d16zVfMZ2KKNRdTaB:0W5jOA96xrRd

Score

10^/10

lumma metasploit backdoor evasion persistence stealer trojan

Malware Config

Extracted

Family

metasploit

Version

encoder/call4_dword_xor

Signatures

Detect Lumma Stealer payload V4 9 IoCs

Processes:

resource	yara_rule
behavioral2/memory/348-7-0x0000000000400000-0x0000000000636000-memory.dmp	family_lumma_v4
behavioral2/memory/3632-25-0x0000000000400000-0x0000000000636000-memory.dmp	family_lumma_v4
behavioral2/memory/3632-35-0x0000000000400000-0x0000000000636000-memory.dmp	family_lumma_v4
behavioral2/memory/3632-45-0x0000000000400000-0x0000000000636000-memory.dmp	family_lumma_v4
behavioral2/memory/3632-68-0x0000000000400000-0x0000000000636000-memory.dmp	family_lumma_v4
behavioral2/memory/3632-78-0x0000000000400000-0x0000000000636000-memory.dmp	family_lumma_v4
behavioral2/memory/3632-112-0x0000000000400000-0x0000000000636000-memory.dmp	family_lumma_v4
behavioral2/memory/3632-122-0x0000000000400000-0x0000000000636000-memory.dmp	family_lumma_v4
behavioral2/memory/3632-155-0x0000000000400000-0x0000000000636000-memory.dmp	family_lumma_v4

Lumma Stealer
An infostealer written in C++ first seen in August 2022.
stealer lumma
MetaSploit
Detected malicious payload which is part of the Metasploit Framework, likely generated with msfvenom or similar.
trojan backdoor metasploit

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

Processes:

wmsncs.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "explorer.exe \"C:\\Windows\\Fonts\\wmsncs.exe\""	wmsncs.exe

Modifies firewall policy service 2 TTPs 8 IoCs

evasion

Modify Registry

T1112

Windows Service

T1543.003

Processes:

wmsncs.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile	wmsncs.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\EnableFirewall = "0"	wmsncs.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DoNotAllowExceptions = "0"	wmsncs.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DisableNotifications = "1"	wmsncs.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile	wmsncs.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile\EnableFirewall = "0"	wmsncs.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile\DoNotAllowExceptions = "0"	wmsncs.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile\DisableNotifications = "1"	wmsncs.exe

Modifies security service 2 TTPs 1 IoCs
evasion

Modify Registry
T1112

Windows Service
T1543.003

Processes:

wmsncs.exe

description ioc process

Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\wscsvc\Start = "4" wmsncs.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\wscsvc\Start = "4"	wmsncs.exe

Windows security bypass 2 TTPs 5 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Processes:

wmsncs.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	wmsncs.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	wmsncs.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallDisableNotify = "1"	wmsncs.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusOverride = "1"	wmsncs.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallOverride = "1"	wmsncs.exe

Looks for VMWare Tools registry key 2 TTPs 2 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

Processes:

Kobalc.exewmsncs.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\VMware, Inc.\VMware Tools	Kobalc.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\VMware, Inc.\VMware Tools	wmsncs.exe

Modifies Installed Components in the registry 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

wmsncs.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{103L3C30-C3B3-4130-9363-E59E1375PERM}	wmsncs.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{103L3C30-C3B3-4130-9363-E59E1375PERM}\StubPath = "C:\\Windows\\Fonts\\wmsncs.exe"	wmsncs.exe

Modifies Windows Firewall 2 TTPs 5 IoCs
evasion

Windows Service
T1543.003

Disable or Modify System Firewall
T1562.004

Processes:

netsh.exenetsh.exenetsh.exenetsh.exenetsh.exe

pid process

3944 netsh.exe
4544 netsh.exe
2572 netsh.exe
4436 netsh.exe
4460 netsh.exe
Deletes itself 1 IoCs

Processes:

wmsncs.exe

pid process

3632 wmsncs.exe
Executes dropped EXE 1 IoCs

Processes:

wmsncs.exe

pid process

3632 wmsncs.exe

pid	process
3944	netsh.exe
4544	netsh.exe
2572	netsh.exe
4436	netsh.exe
4460	netsh.exe

pid	process
3632	wmsncs.exe

pid	process
3632	wmsncs.exe

Windows security modification 2 TTPs 5 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Processes:

wmsncs.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	wmsncs.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	wmsncs.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallDisableNotify = "1"	wmsncs.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusOverride = "1"	wmsncs.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallOverride = "1"	wmsncs.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

wmsncs.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Wmsncs Service = "C:\\Windows\\Fonts\\wmsncs.exe"	wmsncs.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\NvidMediaCenter = "C:\\Program Files (x86)\\Common Files\\System\\wmsncs.exe"	wmsncs.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Spool Driver Service = "C:\\Windows\\system32\\spool\\drivers\\wmsncs.exe"	wmsncs.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Wins Service = "C:\\Windows\\system32\\wins\\wmsncs.exe"	wmsncs.exe

Drops file in System32 directory 4 IoCs

Processes:

wmsncs.exe

description	ioc	process
File created	C:\Windows\system32\spool\drivers\wmsncs.exe	wmsncs.exe
File opened for modification	C:\Windows\system32\spool\drivers\wmsncs.exe	wmsncs.exe
File created	C:\Windows\SysWOW64\wins\wmsncs.exe	wmsncs.exe
File opened for modification	C:\Windows\SysWOW64\wins\wmsncs.exe	wmsncs.exe

Drops file in Program Files directory 3 IoCs

Processes:

wmsncs.exe

description	ioc	process
File created	C:\Program Files (x86)\Common Files\System\wmsncs.exe	wmsncs.exe
File opened for modification	C:\Program Files (x86)\Common Files\System\wmsncs.exe	wmsncs.exe
File opened for modification	C:\Program Files (x86)\Common Files\System	wmsncs.exe

Drops file in Windows directory 2 IoCs

Processes:

Kobalc.exe

description ioc process

File created C:\Windows\Fonts\wmsncs.exe Kobalc.exe
File opened for modification C:\Windows\Fonts\wmsncs.exe Kobalc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

description	ioc	process
File created	C:\Windows\Fonts\wmsncs.exe	Kobalc.exe
File opened for modification	C:\Windows\Fonts\wmsncs.exe	Kobalc.exe

Modifies data under HKEY_USERS 19 IoCs

Processes:

wmsncs.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\MaxConnectionsPer1_0Server = "65534"	wmsncs.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	wmsncs.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	wmsncs.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Active Setup\Installed Components\{103L3C30-C3B3-4130-9363-E59E1375PERM}\StubPath = "C:\\Windows\\Fonts\\wmsncs.exe"	wmsncs.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft	wmsncs.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\MaxConnectionsPerServer = "65534"	wmsncs.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run	wmsncs.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Run\Spool Driver Service = "C:\\Windows\\system32\\spool\\drivers\\wmsncs.exe"	wmsncs.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Run\Wins Service = "C:\\Windows\\system32\\wins\\wmsncs.exe"	wmsncs.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	wmsncs.exe
Key created	\REGISTRY\USER\.DEFAULT\Software	wmsncs.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings	wmsncs.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	wmsncs.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Active Setup\Installed Components\{103L3C30-C3B3-4130-9363-E59E1375PERM}	wmsncs.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Active Setup\Installed Components	wmsncs.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Run\Wmsncs Service = "C:\\Windows\\Fonts\\wmsncs.exe"	wmsncs.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Run\NvidMediaCenter = "C:\\Program Files (x86)\\Common Files\\System\\wmsncs.exe"	wmsncs.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	wmsncs.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Active Setup	wmsncs.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

Kobalc.exewmsncs.exe

description	pid	process
Token: 33	348	Kobalc.exe
Token: SeIncBasePriorityPrivilege	348	Kobalc.exe
Token: 33	3632	wmsncs.exe
Token: SeIncBasePriorityPrivilege	3632	wmsncs.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

wmsncs.exe

description	pid	process	target process
PID 3632 wrote to memory of 4460	3632	wmsncs.exe	netsh.exe
PID 3632 wrote to memory of 4460	3632	wmsncs.exe	netsh.exe
PID 3632 wrote to memory of 4460	3632	wmsncs.exe	netsh.exe
PID 3632 wrote to memory of 3944	3632	wmsncs.exe	netsh.exe
PID 3632 wrote to memory of 3944	3632	wmsncs.exe	netsh.exe
PID 3632 wrote to memory of 3944	3632	wmsncs.exe	netsh.exe
PID 3632 wrote to memory of 4544	3632	wmsncs.exe	netsh.exe
PID 3632 wrote to memory of 4544	3632	wmsncs.exe	netsh.exe
PID 3632 wrote to memory of 4544	3632	wmsncs.exe	netsh.exe
PID 3632 wrote to memory of 2572	3632	wmsncs.exe	netsh.exe
PID 3632 wrote to memory of 2572	3632	wmsncs.exe	netsh.exe
PID 3632 wrote to memory of 2572	3632	wmsncs.exe	netsh.exe
PID 3632 wrote to memory of 4436	3632	wmsncs.exe	netsh.exe
PID 3632 wrote to memory of 4436	3632	wmsncs.exe	netsh.exe
PID 3632 wrote to memory of 4436	3632	wmsncs.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\Kobalc.exe
"C:\Users\Admin\AppData\Local\Temp\Kobalc.exe"
1⤵
- Looks for VMWare Tools registry key
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
PID:348

C:\Windows\Fonts\wmsncs.exe
"C:\Windows\Fonts\wmsncs.exe"
1⤵
- Modifies WinLogon for persistence
- Modifies firewall policy service
- Modifies security service
- Windows security bypass
- Looks for VMWare Tools registry key
- Modifies Installed Components in the registry
- Deletes itself
- Executes dropped EXE
- Windows security modification
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Program Files directory
- Modifies data under HKEY_USERS
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3632

C:\Windows\SysWOW64\netsh.exe
"C:\Windows\System32\netsh.exe" firewall set portopening TCP 1013 BS
2⤵
- Modifies Windows Firewall
PID:4460

C:\Windows\SysWOW64\netsh.exe
"C:\Windows\System32\netsh.exe" firewall set portopening TCP 8080 PORT1
2⤵
- Modifies Windows Firewall
PID:3944

C:\Windows\SysWOW64\netsh.exe
"C:\Windows\System32\netsh.exe" firewall set portopening TCP 8081 PORT2
2⤵
- Modifies Windows Firewall
PID:4544

C:\Windows\SysWOW64\netsh.exe
"C:\Windows\System32\netsh.exe" firewall add allowedprogram "C:\Windows\Fonts\wmsncs.exe" workstation ENABLE ALL
2⤵
- Modifies Windows Firewall
PID:2572

C:\Windows\SysWOW64\netsh.exe
"C:\Windows\System32\netsh.exe" firewall set allowedprogram "C:\Windows\Fonts\wmsncs.exe" workstation ENABLE ALL
2⤵
- Modifies Windows Firewall
PID:4436

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\Fonts\wmsncs.exe
Filesize
185KB

MD5
15717cd327a723820d71900611545917

SHA1
99184ec149d329e98cd3e600cfaba22a2f9a0156

SHA256
db6cea7e8d62d3b21efe3b423b48c131e345cb55f168cbe1f142e491bb812747

SHA512
a0de435db809e3e79f89411017e244c76145e010c67f894d41e265804c832f5514ac2f31cc9a0c667afa77aaaf3eccecac148279ca5a0feba492b222d5481a49

Download Submit
memory/348-7-0x0000000000400000-0x0000000000636000-memory.dmp

Filesize
2.2MB

Download
memory/348-1-0x0000000000680000-0x0000000000682000-memory.dmp

Filesize
8KB

Download
memory/348-0-0x0000000000400000-0x0000000000636000-memory.dmp

Filesize
2.2MB

Download
memory/3632-35-0x0000000000400000-0x0000000000636000-memory.dmp

Filesize
2.2MB

Download
memory/3632-25-0x0000000000400000-0x0000000000636000-memory.dmp

Filesize
2.2MB

Download
memory/3632-6-0x00000000009F0000-0x00000000009F2000-memory.dmp

Filesize
8KB

Download
memory/3632-45-0x0000000000400000-0x0000000000636000-memory.dmp

Filesize
2.2MB

Download
memory/3632-68-0x0000000000400000-0x0000000000636000-memory.dmp

Filesize
2.2MB

Download
memory/3632-78-0x0000000000400000-0x0000000000636000-memory.dmp

Filesize
2.2MB

Download
memory/3632-112-0x0000000000400000-0x0000000000636000-memory.dmp

Filesize
2.2MB

Download
memory/3632-122-0x0000000000400000-0x0000000000636000-memory.dmp

Filesize
2.2MB

Download
memory/3632-155-0x0000000000400000-0x0000000000636000-memory.dmp

Filesize
2.2MB

Download