2919b157d8d2161bf56a17af0efc171d8e2c3c233284cf116e8c968dd9704572

General

Target

Wattylexe.exe
Size

477KB
MD5

34e03669773d47d0d8f01be78ae484e4
SHA1

4b0a7e2af2c28ae191737ba07632ed354d35c978
SHA256

2919b157d8d2161bf56a17af0efc171d8e2c3c233284cf116e8c968dd9704572
SHA512

8d93fab3c2544d015af2d84f07d3ebbf8acead8bb0185ffb045302b2be19ac12cd2ac59288313bd75bc230768c90e68139c124ea89df943776b1cfaac4876a7f
SSDEEP

6144:ZvZ2iKiZ/QAKVfiROzkViZwc0W/1vNuMqTp/CelAaWjSZ/nnnKCXP7:J7wVfiRuqPW/dgMqIHdjSFnnKCX

Score

10^/10

evasion persistence

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe RVHOST.exe"	Wattylexe.exe

Disables RegEdit via registry modification 1 IoCs

evasion

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-508929744-1894537824-211734425-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	Wattylexe.exe

Disables Task Manager via registry modification
evasion

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-508929744-1894537824-211734425-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Yahoo Messengger = "C:\\Windows\\system32\\RVHOST.exe"	Wattylexe.exe
Key created	\REGISTRY\USER\S-1-5-21-508929744-1894537824-211734425-1000\Software\Microsoft\Windows\CurrentVersion\Run	Wattylexe.exe

Enumerates connected drives 3 TTPs 23 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\b:	Wattylexe.exe
File opened (read-only)	\??\p:	Wattylexe.exe
File opened (read-only)	\??\t:	Wattylexe.exe
File opened (read-only)	\??\u:	Wattylexe.exe
File opened (read-only)	\??\v:	Wattylexe.exe
File opened (read-only)	\??\z:	Wattylexe.exe
File opened (read-only)	\??\a:	Wattylexe.exe
File opened (read-only)	\??\e:	Wattylexe.exe
File opened (read-only)	\??\k:	Wattylexe.exe
File opened (read-only)	\??\o:	Wattylexe.exe
File opened (read-only)	\??\r:	Wattylexe.exe
File opened (read-only)	\??\s:	Wattylexe.exe
File opened (read-only)	\??\g:	Wattylexe.exe
File opened (read-only)	\??\h:	Wattylexe.exe
File opened (read-only)	\??\n:	Wattylexe.exe
File opened (read-only)	\??\q:	Wattylexe.exe
File opened (read-only)	\??\x:	Wattylexe.exe
File opened (read-only)	\??\y:	Wattylexe.exe
File opened (read-only)	\??\i:	Wattylexe.exe
File opened (read-only)	\??\j:	Wattylexe.exe
File opened (read-only)	\??\l:	Wattylexe.exe
File opened (read-only)	\??\m:	Wattylexe.exe
File opened (read-only)	\??\w:	Wattylexe.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\RVHOST.exe	Wattylexe.exe
File opened for modification	C:\Windows\SysWOW64\RVHOST.exe	Wattylexe.exe
File created	C:\Windows\SysWOW64\setting.ini	Wattylexe.exe
File opened for modification	C:\Windows\SysWOW64\setting.ini	Wattylexe.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\RVHOST.exe	Wattylexe.exe
File opened for modification	C:\Windows\RVHOST.exe	Wattylexe.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
564	Wattylexe.exe
564	Wattylexe.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 564 wrote to memory of 1860	564	Wattylexe.exe	85
PID 564 wrote to memory of 1860	564	Wattylexe.exe	85
PID 564 wrote to memory of 1860	564	Wattylexe.exe	85
PID 1860 wrote to memory of 4164	1860	cmd.exe	87
PID 1860 wrote to memory of 4164	1860	cmd.exe	87
PID 1860 wrote to memory of 4164	1860	cmd.exe	87
PID 564 wrote to memory of 1056	564	Wattylexe.exe	88
PID 564 wrote to memory of 1056	564	Wattylexe.exe	88
PID 564 wrote to memory of 1056	564	Wattylexe.exe	88
PID 1056 wrote to memory of 4684	1056	cmd.exe	90
PID 1056 wrote to memory of 4684	1056	cmd.exe	90
PID 1056 wrote to memory of 4684	1056	cmd.exe	90

C:\Users\Admin\AppData\Local\Temp\Wattylexe.exe
"C:\Users\Admin\AppData\Local\Temp\Wattylexe.exe"
1⤵
- Modifies WinLogon for persistence
- Disables RegEdit via registry modification
- Adds Run key to start application
- Enumerates connected drives
- Drops file in System32 directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:564
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /C AT /delete /yes
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1860
- - C:\Windows\SysWOW64\at.exe
    AT /delete /yes
    3⤵
    PID:4164
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /C AT 09:00 /interactive /EVERY:m,t,w,th,f,s,su C:\Windows\system32\RVHOST.exe
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1056
- - C:\Windows\SysWOW64\at.exe
    AT 09:00 /interactive /EVERY:m,t,w,th,f,s,su C:\Windows\system32\RVHOST.exe
    3⤵
    PID:4684

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

Winlogon Helper DLL

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/564-133-0x0000000000400000-0x000000000048D000-memory.dmp

Filesize
564KB

Download
memory/564-149-0x0000000000400000-0x000000000048D000-memory.dmp

Filesize
564KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads