eb031f364fc55eebd422a6a2e3397d81e81c8a09bb8fcd03c6d7edab041ed5f4

General

Target

eb031f364fc55eebd422a6a2e3397d81e81c8a09bb8fcd03c6d7edab041ed5f4.exe
Size

20KB
MD5

f484c63d37b4bae82e9234175a9185e7
SHA1

9fc47f0336a530b7234deb6a1cb8312501aee398
SHA256

eb031f364fc55eebd422a6a2e3397d81e81c8a09bb8fcd03c6d7edab041ed5f4
SHA512

e7938fb2a0c6d86483a9e59f0e3e3ceda6895e517738d0c4bfb999eb5e4de00f2b4ca347721d8cd513b2c3b70dd233d86ac2ba139f39da81d5cfa0526240d0dc
SSDEEP

384:1dvTbdBkQQlBNzawKN2SrZ5XMm22clzY9bjzFRBp6YFubsI3eLGvm:1d7bdjOpabwSraPYr2EIuLw

Score

10^/10

evasion persistence upx

Malware Config

Signatures

Modifies firewall policy service 2 TTPs 2 IoCs

evasion

Modify Registry

T1112

Modify Existing Service

T1031

description	ioc	Process
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List	eb031f364fc55eebd422a6a2e3397d81e81c8a09bb8fcd03c6d7edab041ed5f4.exe
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\C:\Users\Admin\AppData\Local\Temp\eb031f364fc55eebd422a6a2e3397d81e81c8a09bb8fcd03c6d7edab041ed5f4.exe = "C:\\Users\\Admin\\AppData\\Local\\Temp\\eb031f364fc55eebd422a6a2e3397d81e81c8a09bb8fcd03c6d7edab041ed5f4.exe:*:Enabled:Windows Services"	eb031f364fc55eebd422a6a2e3397d81e81c8a09bb8fcd03c6d7edab041ed5f4.exe

Executes dropped EXE 1 IoCs

pid	Process
2036	winrst.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x000c0000000054a8-56.dat	upx
behavioral1/memory/1952-57-0x0000000000400000-0x0000000000454000-memory.dmp	upx
behavioral1/memory/2036-59-0x0000000000400000-0x0000000000454000-memory.dmp	upx
behavioral1/memory/1952-60-0x0000000000400000-0x0000000000454000-memory.dmp	upx
behavioral1/memory/2036-62-0x0000000000400000-0x0000000000454000-memory.dmp	upx

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\	eb031f364fc55eebd422a6a2e3397d81e81c8a09bb8fcd03c6d7edab041ed5f4.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Windows Services = "winrst.exe"	eb031f364fc55eebd422a6a2e3397d81e81c8a09bb8fcd03c6d7edab041ed5f4.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\winrst.exe	eb031f364fc55eebd422a6a2e3397d81e81c8a09bb8fcd03c6d7edab041ed5f4.exe
File opened for modification	C:\Windows\winrst.exe	eb031f364fc55eebd422a6a2e3397d81e81c8a09bb8fcd03c6d7edab041ed5f4.exe

Suspicious behavior: EnumeratesProcesses 30 IoCs

pid	Process
1952	eb031f364fc55eebd422a6a2e3397d81e81c8a09bb8fcd03c6d7edab041ed5f4.exe
1952	eb031f364fc55eebd422a6a2e3397d81e81c8a09bb8fcd03c6d7edab041ed5f4.exe
1952	eb031f364fc55eebd422a6a2e3397d81e81c8a09bb8fcd03c6d7edab041ed5f4.exe
1952	eb031f364fc55eebd422a6a2e3397d81e81c8a09bb8fcd03c6d7edab041ed5f4.exe
1952	eb031f364fc55eebd422a6a2e3397d81e81c8a09bb8fcd03c6d7edab041ed5f4.exe
1952	eb031f364fc55eebd422a6a2e3397d81e81c8a09bb8fcd03c6d7edab041ed5f4.exe
1952	eb031f364fc55eebd422a6a2e3397d81e81c8a09bb8fcd03c6d7edab041ed5f4.exe
1952	eb031f364fc55eebd422a6a2e3397d81e81c8a09bb8fcd03c6d7edab041ed5f4.exe
1952	eb031f364fc55eebd422a6a2e3397d81e81c8a09bb8fcd03c6d7edab041ed5f4.exe
1952	eb031f364fc55eebd422a6a2e3397d81e81c8a09bb8fcd03c6d7edab041ed5f4.exe
1952	eb031f364fc55eebd422a6a2e3397d81e81c8a09bb8fcd03c6d7edab041ed5f4.exe
1952	eb031f364fc55eebd422a6a2e3397d81e81c8a09bb8fcd03c6d7edab041ed5f4.exe
1952	eb031f364fc55eebd422a6a2e3397d81e81c8a09bb8fcd03c6d7edab041ed5f4.exe
1952	eb031f364fc55eebd422a6a2e3397d81e81c8a09bb8fcd03c6d7edab041ed5f4.exe
1952	eb031f364fc55eebd422a6a2e3397d81e81c8a09bb8fcd03c6d7edab041ed5f4.exe
2036	winrst.exe
2036	winrst.exe
2036	winrst.exe
2036	winrst.exe
2036	winrst.exe
2036	winrst.exe
2036	winrst.exe
2036	winrst.exe
2036	winrst.exe
2036	winrst.exe
2036	winrst.exe
2036	winrst.exe
2036	winrst.exe
2036	winrst.exe
2036	winrst.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2036	winrst.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1952 wrote to memory of 2036	1952	eb031f364fc55eebd422a6a2e3397d81e81c8a09bb8fcd03c6d7edab041ed5f4.exe	28
PID 1952 wrote to memory of 2036	1952	eb031f364fc55eebd422a6a2e3397d81e81c8a09bb8fcd03c6d7edab041ed5f4.exe	28
PID 1952 wrote to memory of 2036	1952	eb031f364fc55eebd422a6a2e3397d81e81c8a09bb8fcd03c6d7edab041ed5f4.exe	28
PID 1952 wrote to memory of 2036	1952	eb031f364fc55eebd422a6a2e3397d81e81c8a09bb8fcd03c6d7edab041ed5f4.exe	28
PID 2036 wrote to memory of 1212	2036	winrst.exe	15
PID 2036 wrote to memory of 1212	2036	winrst.exe	15

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1212
- C:\Users\Admin\AppData\Local\Temp\eb031f364fc55eebd422a6a2e3397d81e81c8a09bb8fcd03c6d7edab041ed5f4.exe
  "C:\Users\Admin\AppData\Local\Temp\eb031f364fc55eebd422a6a2e3397d81e81c8a09bb8fcd03c6d7edab041ed5f4.exe"
  2⤵
  - Modifies firewall policy service
  - Adds Run key to start application
  - Drops file in Windows directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1952
- - C:\Windows\winrst.exe
    "C:\Windows\winrst.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of FindShellTrayWindow
    - Suspicious use of WriteProcessMemory
    PID:2036

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\winrst.exe

Filesize
20KB

MD5
f484c63d37b4bae82e9234175a9185e7

SHA1
9fc47f0336a530b7234deb6a1cb8312501aee398

SHA256
eb031f364fc55eebd422a6a2e3397d81e81c8a09bb8fcd03c6d7edab041ed5f4

SHA512
e7938fb2a0c6d86483a9e59f0e3e3ceda6895e517738d0c4bfb999eb5e4de00f2b4ca347721d8cd513b2c3b70dd233d86ac2ba139f39da81d5cfa0526240d0dc

Download Submit
memory/1952-54-0x0000000075E31000-0x0000000075E33000-memory.dmp

Filesize
8KB

Download
memory/1952-57-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/1952-58-0x0000000000460000-0x00000000004B4000-memory.dmp

Filesize
336KB

Download
memory/1952-60-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/2036-55-0x0000000000000000-mapping.dmp

Download
memory/2036-59-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/2036-62-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads