d80da3a9bd6f2fa02bd4e2dcc4bd99510b7f241af45237767fd0af72da17d0dc

Analysis

max time kernel
16s
max time network
16s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
03/09/2024, 00:52

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General

Target

a08910062698fb646d33247577a990f0N.exe
Size

212KB
MD5

a08910062698fb646d33247577a990f0
SHA1

e25ffc355b69eae3702047693d383a82a3f782e3
SHA256

d80da3a9bd6f2fa02bd4e2dcc4bd99510b7f241af45237767fd0af72da17d0dc
SHA512

a3b2a0fcdd29c608e3370c78a2ab8feb7cac8dd641e302cd015835d6d781c327f97eb9db19276b7e7b74306707cbb233f46317aef9c7ca0731a5eb2af7e7e829
SSDEEP

6144:rNaGArfd6E8nPlOR+0syugliKK329wMDHzA52M:IGArYEtRbsVei/3zMDTTM

Score

10^/10

discovery persistence upx

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "userinit.exe,riodrv.exe"	a08910062698fb646d33247577a990f0N.exe

Executes dropped EXE 1 IoCs

pid	Process
1804	riodrv.exe

Loads dropped DLL 2 IoCs

pid	Process
2112	a08910062698fb646d33247577a990f0N.exe
2112	a08910062698fb646d33247577a990f0N.exe

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/2112-0-0x0000000000400000-0x0000000000488000-memory.dmp	upx
behavioral1/files/0x000e000000012262-4.dat	upx
behavioral1/memory/1804-12-0x0000000000400000-0x0000000000488000-memory.dmp	upx
behavioral1/memory/2112-16-0x0000000000400000-0x0000000000488000-memory.dmp	upx
behavioral1/memory/1804-14-0x0000000000400000-0x0000000000488000-memory.dmp	upx

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\riodrv.exe	a08910062698fb646d33247577a990f0N.exe
File opened for modification	C:\Windows\SysWOW64\riodrv.exe	a08910062698fb646d33247577a990f0N.exe

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a08910062698fb646d33247577a990f0N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	riodrv.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2112 wrote to memory of 1804	2112	a08910062698fb646d33247577a990f0N.exe	30
PID 2112 wrote to memory of 1804	2112	a08910062698fb646d33247577a990f0N.exe	30
PID 2112 wrote to memory of 1804	2112	a08910062698fb646d33247577a990f0N.exe	30
PID 2112 wrote to memory of 1804	2112	a08910062698fb646d33247577a990f0N.exe	30

C:\Users\Admin\AppData\Local\Temp\a08910062698fb646d33247577a990f0N.exe
"C:\Users\Admin\AppData\Local\Temp\a08910062698fb646d33247577a990f0N.exe"
1⤵
- Modifies WinLogon for persistence
- Loads dropped DLL
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2112
- C:\Windows\SysWOW64\riodrv.exe
  C:\Windows\system32\riodrv.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:1804

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Windows\SysWOW64\riodrv.exe

Filesize
212KB

MD5
0e2e2b07714e279a285f289efa53d90e

SHA1
3f704178f5fe2ce7bac69415f43983b4432b9f5d

SHA256
5b297c7567724e1effcc15abf30cd4afa53722a4c217798ca4cc6100cfd94150

SHA512
915b5eec891c371eb10aaa2d668de4bafb92891aad05d5a424713fd979dc2f835eb2fdc87e5a8c1bfb04f94887b2369e86c7a25998686801431c41c354d89702

Download Submit
memory/1804-12-0x0000000000400000-0x0000000000488000-memory.dmp

Filesize
544KB

Download
memory/1804-14-0x0000000000400000-0x0000000000488000-memory.dmp

Filesize
544KB

Download
memory/2112-0-0x0000000000400000-0x0000000000488000-memory.dmp

Filesize
544KB

Download
memory/2112-1-0x0000000000320000-0x0000000000321000-memory.dmp

Filesize
4KB

Download
memory/2112-11-0x0000000001F80000-0x0000000002008000-memory.dmp

Filesize
544KB

Download
memory/2112-16-0x0000000000400000-0x0000000000488000-memory.dmp

Filesize
544KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads