masslogger | accb153830327075ce1b342d2199d07f330fea6fc95cff4099d2e07079a117fc

General

Target

SKM_C3350191107102300.exe
Size

1.3MB
MD5

4509f8b27545e3a27ee3bc66df679b7c
SHA1

0b3687916e09fdf8528e06670ab6ba7b0b72fdf3
SHA256

15d49746815865a2bc0eb51c3479cf49a1e3cff398479a31c935d1cfbb64d5f0
SHA512

f77331f04e958ba87a4ba1b927d28058ce382242bf2242636bf9e96101b4ac43ca49c557744d7a7df6a35ea7c314101ae40491edde643aa8894d656873d93d92

Score

10^/10

masslogger spyware stealer

Malware Config

Signatures

MassLogger
Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.
stealer spyware masslogger

MassLogger Main Payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3856-132-0x0000000000000000-mapping.dmp	family_masslogger
behavioral2/memory/3856-133-0x0000000000400000-0x00000000004B8000-memory.dmp	family_masslogger

Suspicious use of SetThreadContext 1 IoCs

Processes:

SKM_C3350191107102300.exe

description pid process target process

PID 4976 set thread context of 3856 4976 SKM_C3350191107102300.exe RegSvcs.ExE
Drops file in Windows directory 1 IoCs

Processes:

dw20.exe

description ioc process

File created C:\Windows\AppCompat\Programs\Amcache.hve.tmp dw20.exe

description	pid	process	target process
PID 4976 set thread context of 3856	4976	SKM_C3350191107102300.exe	RegSvcs.ExE

description	ioc	process
File created	C:\Windows\AppCompat\Programs\Amcache.hve.tmp	dw20.exe

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

dw20.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	dw20.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

dw20.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	dw20.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

dw20.exe

description	pid	process
Token: SeRestorePrivilege	1416	dw20.exe
Token: SeBackupPrivilege	1416	dw20.exe
Token: SeBackupPrivilege	1416	dw20.exe
Token: SeBackupPrivilege	1416	dw20.exe
Token: SeBackupPrivilege	1416	dw20.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

SKM_C3350191107102300.exe

pid process

4976 SKM_C3350191107102300.exe

pid	process
4976	SKM_C3350191107102300.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

SKM_C3350191107102300.exeRegSvcs.ExE

description	pid	process	target process
PID 4976 wrote to memory of 3856	4976	SKM_C3350191107102300.exe	RegSvcs.ExE
PID 4976 wrote to memory of 3856	4976	SKM_C3350191107102300.exe	RegSvcs.ExE
PID 4976 wrote to memory of 3856	4976	SKM_C3350191107102300.exe	RegSvcs.ExE
PID 4976 wrote to memory of 3856	4976	SKM_C3350191107102300.exe	RegSvcs.ExE
PID 4976 wrote to memory of 3856	4976	SKM_C3350191107102300.exe	RegSvcs.ExE
PID 4976 wrote to memory of 3856	4976	SKM_C3350191107102300.exe	RegSvcs.ExE
PID 4976 wrote to memory of 3856	4976	SKM_C3350191107102300.exe	RegSvcs.ExE
PID 4976 wrote to memory of 3856	4976	SKM_C3350191107102300.exe	RegSvcs.ExE
PID 3856 wrote to memory of 1416	3856	RegSvcs.ExE	dw20.exe
PID 3856 wrote to memory of 1416	3856	RegSvcs.ExE	dw20.exe
PID 3856 wrote to memory of 1416	3856	RegSvcs.ExE	dw20.exe

C:\Users\Admin\AppData\Local\Temp\SKM_C3350191107102300.exe
"C:\Users\Admin\AppData\Local\Temp\SKM_C3350191107102300.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4976

C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.ExE
"C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.ExE"
2⤵
- Suspicious use of WriteProcessMemory
PID:3856

C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
dw20.exe -x -s 764
3⤵
- Drops file in Windows directory
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious use of AdjustPrivilegeToken
PID:1416

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1416-135-0x0000000000000000-mapping.dmp

Download
memory/3856-132-0x0000000000000000-mapping.dmp

Download
memory/3856-133-0x0000000000400000-0x00000000004B8000-memory.dmp

Filesize
736KB

Download
memory/3856-134-0x0000000074A10000-0x0000000074FC1000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads