strrat | 39694a390267d62c814460cb461426a78d3d43a701f5877896c8cbec48c7827d | Triage™

Analysis

max time kernel
295s
max time network
300s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-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
3028	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-1-5-21-2860750803-256193626-1801997576-1000\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
1672	schtasks.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 536 wrote to memory of 3028	536	java.exe	86
PID 536 wrote to memory of 3028	536	java.exe	86
PID 536 wrote to memory of 4480	536	java.exe	91
PID 536 wrote to memory of 4480	536	java.exe	91
PID 536 wrote to memory of 2384	536	java.exe	92
PID 536 wrote to memory of 2384	536	java.exe	92
PID 4480 wrote to memory of 1672	4480	cmd.exe	95
PID 4480 wrote to memory of 1672	4480	cmd.exe	95

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:536
- 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:3028
- 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:4480
- - 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:1672
- 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:2384

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

Submit Download

3903daac9bc4a3b7.timestamp

Path C:\ProgramData\Oracle\Java\.oracle_jre_usage\3903daac9bc4a3b7.timestamp
Size 46B
SHA256 d494d4e48c72b0f974c206f6cf8b3ec1d984db2dcfc8cda038a1e32520f86d7e
MD5 48f798f5ff70390d6b91a405d896cf27
SHA1 645230228c5ad422d32ca0f2703d32d7ad3c2d50
SHA512 60034ddad6aab9abb1505f2d5de7a4631d2024ebe207e69874e089e19f0b5d67bf9425b908c6171b8730e67e05143f1edfff6e1a7494a192a8317c1f187d87c8
MD5 SHA1 SHA512

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memory/536-62-0x00000251D0BB0000-0x00000251D1BB0000-memory.dmp

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memory/536-29-0x00000251D0E40000-0x00000251D0E50000-memory.dmp

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memory/536-12-0x00000251CF360000-0x00000251CF361000-memory.dmp

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memory/536-34-0x00000251D0E90000-0x00000251D0EA0000-memory.dmp

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memory/536-33-0x00000251D0E80000-0x00000251D0E90000-memory.dmp

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memory/536-32-0x00000251D0E70000-0x00000251D0E80000-memory.dmp

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memory/536-31-0x00000251D0E60000-0x00000251D0E70000-memory.dmp

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memory/536-10-0x00000251D0BB0000-0x00000251D1BB0000-memory.dmp

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memory/536-30-0x00000251D0E50000-0x00000251D0E60000-memory.dmp

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memory/536-28-0x00000251D0E30000-0x00000251D0E40000-memory.dmp

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memory/536-19-0x00000251D0BB0000-0x00000251D1BB0000-memory.dmp

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memory/2384-46-0x0000021300000000-0x0000021301000000-memory.dmp

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memory/2384-47-0x000002137E2A0000-0x000002137E2A1000-memory.dmp

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memory/2384-57-0x0000021300000000-0x0000021301000000-memory.dmp

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memory/2384-58-0x0000021300000000-0x0000021301000000-memory.dmp

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memory/2384-59-0x0000021300000000-0x0000021301000000-memory.dmp

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memory/2384-55-0x0000021300000000-0x0000021301000000-memory.dmp

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memory/2384-63-0x0000021300000000-0x0000021301000000-memory.dmp

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memory/2384-64-0x0000021300000000-0x0000021301000000-memory.dmp

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memory/2384-65-0x0000021300000000-0x0000021301000000-memory.dmp

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memory/2384-66-0x0000021300000000-0x0000021301000000-memory.dmp

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memory/2384-68-0x0000021300000000-0x0000021301000000-memory.dmp

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memory/2384-69-0x0000021300000000-0x0000021301000000-memory.dmp

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