strrat | 39694a390267d62c814460cb461426a78d3d43a701f5877896c8cbec48c7827d | Triage™

Analysis

max time kernel
295s
max time network
299s
platform
windows11-21h2_x64
resource
win11-20240419-en
resource tags

arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
submitted
28/04/2024, 16:48

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General

Target
39694a390267d62c814460cb461426a78d3d43a701f5877896c8cbec48c7827d.jar
Size 64KB
Sample240428-vbge7scb78
SHA256 39694a390267d62c814460cb461426a78d3d43a701f5877896c8cbec48c7827d
MD5 5d16505a5abfcfc99095a676f1f0bd64
SHA1 facfb1f1014ba5f8c8618678a1a9a7f5bf5c35e5
SHA512 a49885eb60f6429c1247ae44bcf806836031a7191078a3b14b47c26b577bd2824d64ab17df8244361e114235600043188eae2794f58f299094976682865dc2cb
SSDEEP 1536:UNWRlwUsz/P+zKG2X2CWYqLvSUWD+YBFBbOl+H/Zm:UNisz/6YriYFfH/Zm
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

strrat discovery persistence stealer trojan

Malware Config

Signatures

STRRAT
STRRAT is a remote access tool than can steal credentials and log keystrokes.
trojan stealer strrat

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\39694a390267d62c814460cb461426a78d3d43a701f5877896c8cbec48c7827d.jar	java.exe

Modifies file permissions 1 TTPs 1 IoCs

File and Directory Permissions Modification

pid	Process
2648	icacls.exe

Adds Run key to start application 2 TTPs 2 IoCs

Registry Run Keys / Startup Folder

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2878097196-921257239-309638238-1000\Software\Microsoft\Windows\CurrentVersion\Run\39694a390267d62c814460cb461426a78d3d43a701f5877896c8cbec48c7827d = "\"C:\\Program Files\\Java\\jre-1.8\\bin\\javaw.exe\" -jar \"C:\\Users\\Admin\\AppData\\Roaming\\39694a390267d62c814460cb461426a78d3d43a701f5877896c8cbec48c7827d.jar\""	java.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\39694a390267d62c814460cb461426a78d3d43a701f5877896c8cbec48c7827d = "\"C:\\Program Files\\Java\\jre-1.8\\bin\\javaw.exe\" -jar \"C:\\Users\\Admin\\AppData\\Roaming\\39694a390267d62c814460cb461426a78d3d43a701f5877896c8cbec48c7827d.jar\""	java.exe

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

Scheduled Task/Job

pid	Process
2892	schtasks.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4596 wrote to memory of 2648	4596	java.exe	80
PID 4596 wrote to memory of 2648	4596	java.exe	80
PID 4596 wrote to memory of 4880	4596	java.exe	83
PID 4596 wrote to memory of 4880	4596	java.exe	83
PID 4596 wrote to memory of 4812	4596	java.exe	84
PID 4596 wrote to memory of 4812	4596	java.exe	84
PID 4880 wrote to memory of 2892	4880	cmd.exe	87
PID 4880 wrote to memory of 2892	4880	cmd.exe	87

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Program Files (x86)\Common Files\Oracle\Java\javapath\java.exe
java -jar C:\Users\Admin\AppData\Local\Temp\39694a390267d62c814460cb461426a78d3d43a701f5877896c8cbec48c7827d.jar
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:4596
- C:\Windows\system32\icacls.exe
  C:\Windows\system32\icacls.exe C:\ProgramData\Oracle\Java\.oracle_jre_usage /grant "everyone":(OI)(CI)M
  2⤵
  - Modifies file permissions
  PID:2648
- C:\Windows\SYSTEM32\cmd.exe
  cmd /c schtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\39694a390267d62c814460cb461426a78d3d43a701f5877896c8cbec48c7827d.jar"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4880
- - C:\Windows\system32\schtasks.exe
    schtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\39694a390267d62c814460cb461426a78d3d43a701f5877896c8cbec48c7827d.jar"
    3⤵
    - Creates scheduled task(s)
    PID:2892
- C:\Program Files\Java\jre-1.8\bin\java.exe
  "C:\Program Files\Java\jre-1.8\bin\java.exe" -jar "C:\Users\Admin\AppData\Roaming\39694a390267d62c814460cb461426a78d3d43a701f5877896c8cbec48c7827d.jar"
  2⤵
  PID:4812

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

Persistence

Boot or Logon Autostart Execution

Registry Run Keys / Startup Folder

Scheduled Task/Job

Privilege Escalation

Boot or Logon Autostart Execution

Registry Run Keys / Startup Folder

Scheduled Task/Job

Defense Evasion

File and Directory Permissions Modification

Modify Registry

Credential Access

Discovery

Query Registry

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

39694a390267d62c814460cb461426a78d3d43a701f5877896c8cbec48c7827d.jar

Path C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Startup\39694a390267d62c814460cb461426a78d3d43a701f5877896c8cbec48c7827d.jar
Size 64KB
SHA256 39694a390267d62c814460cb461426a78d3d43a701f5877896c8cbec48c7827d
MD5 5d16505a5abfcfc99095a676f1f0bd64
SHA1 facfb1f1014ba5f8c8618678a1a9a7f5bf5c35e5
SHA512 a49885eb60f6429c1247ae44bcf806836031a7191078a3b14b47c26b577bd2824d64ab17df8244361e114235600043188eae2794f58f299094976682865dc2cb
SSDEEP 1536:UNWRlwUsz/P+zKG2X2CWYqLvSUWD+YBFBbOl+H/Zm:UNisz/6YriYFfH/Zm
MD5 SHA1 SHA512 SSDEEP

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3903daac9bc4a3b7.timestamp

Path C:\ProgramData\Oracle\Java\.oracle_jre_usage\3903daac9bc4a3b7.timestamp
Size 46B
SHA256 e74bb9c73696a1058b53e7964688d40e050ed0575174bc13b4b6b04e0c43e6eb
MD5 72fa569abf9b4fbb944f9f2ad2a59379
SHA1 85f77b9d1f1a60aba95adaee445efdafc9c0cac8
SHA512 13211ef7618f8791a25d1c929404d90f9a021d430de5c471da76c4ffb408dc7ecf06a1812653b532ae5420f737e42552551d93a2ce7a374ce74120353af505f2
MD5 SHA1 SHA512

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memory/4596-38-0x000002111A2C0000-0x000002111A2D0000-memory.dmp

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memory/4596-35-0x000002111A290000-0x000002111A2A0000-memory.dmp

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memory/4596-12-0x00000211186C0000-0x00000211186C1000-memory.dmp

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memory/4596-30-0x00000211186C0000-0x00000211186C1000-memory.dmp

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memory/4596-33-0x000002111A250000-0x000002111A260000-memory.dmp

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memory/4596-39-0x000002111A2D0000-0x000002111A2E0000-memory.dmp

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memory/4596-11-0x0000021119FD0000-0x000002111AFD0000-memory.dmp

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memory/4596-37-0x000002111A2B0000-0x000002111A2C0000-memory.dmp

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memory/4596-36-0x000002111A2A0000-0x000002111A2B0000-memory.dmp

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memory/4596-24-0x0000021119FD0000-0x000002111AFD0000-memory.dmp

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memory/4596-34-0x000002111A280000-0x000002111A290000-memory.dmp

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memory/4596-32-0x000002111A270000-0x000002111A280000-memory.dmp

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memory/4596-31-0x000002111A260000-0x000002111A270000-memory.dmp

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memory/4596-65-0x0000021119FD0000-0x000002111AFD0000-memory.dmp

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memory/4812-52-0x00000215ACCC0000-0x00000215ACCC1000-memory.dmp

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memory/4812-51-0x00000215AE300000-0x00000215AF300000-memory.dmp

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memory/4812-66-0x00000215AE300000-0x00000215AF300000-memory.dmp

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