strrat | 361868581afd0fa1eaed8c46990eee5074342033dc26ace69eb0e5eb72876d43

Analysis

max time kernel
121s
max time network
143s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
22/03/2024, 02:22

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General

Target
361868581afd0fa1eaed8c46990eee5074342033dc26ace69eb0e5eb72876d43.jar
Size 64KB
Sample240322-ct2jzsfc32
SHA256 361868581afd0fa1eaed8c46990eee5074342033dc26ace69eb0e5eb72876d43
MD5 2dc3ec1f2b21887d14f66045a1bf312f
SHA1 ee559cc3e69ca0c429d13576e086e2dcba323332
SHA512 d68443266a0e5ef08fcd72d8bf0cdd3d17914f57c6fbd37e0eaf648b4dff406c4c2e55a3b2daa6dbeddc9ad656971b3dbb0b635caff65d9d28c60ea986682812
SSDEEP 1536:S59vZVcVMHH45oJxm4UxtOPLpMy09xHrd3W4UB:SjZnHY5IctOPLpU04UB
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\361868581afd0fa1eaed8c46990eee5074342033dc26ace69eb0e5eb72876d43.jar	java.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4592	icacls.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\361868581afd0fa1eaed8c46990eee5074342033dc26ace69eb0e5eb72876d43 = "\"C:\\Program Files\\Java\\jre-1.8\\bin\\javaw.exe\" -jar \"C:\\Users\\Admin\\AppData\\Roaming\\361868581afd0fa1eaed8c46990eee5074342033dc26ace69eb0e5eb72876d43.jar\""	java.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\361868581afd0fa1eaed8c46990eee5074342033dc26ace69eb0e5eb72876d43 = "\"C:\\Program Files\\Java\\jre-1.8\\bin\\javaw.exe\" -jar \"C:\\Users\\Admin\\AppData\\Roaming\\361868581afd0fa1eaed8c46990eee5074342033dc26ace69eb0e5eb72876d43.jar\""	java.exe

Drops file in Program Files directory 12 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\Java\jre-1.8\bin\dll\ntdll.pdb	java.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\server\jvm.pdb	java.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\server\dll\jvm.pdb	java.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\server\symbols\dll\jvm.pdb	java.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\dll\jvm.pdb	java.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\server\ntdll.pdb	java.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\ntdll.pdb	java.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\jvm.pdb	java.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\symbols\dll\jvm.pdb	java.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\server\dll\ntdll.pdb	java.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\server\symbols\dll\ntdll.pdb	java.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\symbols\dll\ntdll.pdb	java.exe

Creates scheduled task(s) 1 TTPs 1 IoCs

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

persistence

Scheduled Task/Job

T1053

pid	Process
64	schtasks.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 532 wrote to memory of 4592	532	java.exe	89
PID 532 wrote to memory of 4592	532	java.exe	89
PID 532 wrote to memory of 4696	532	java.exe	91
PID 532 wrote to memory of 4696	532	java.exe	91
PID 532 wrote to memory of 4036	532	java.exe	92
PID 532 wrote to memory of 4036	532	java.exe	92
PID 4696 wrote to memory of 64	4696	cmd.exe	95
PID 4696 wrote to memory of 64	4696	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\361868581afd0fa1eaed8c46990eee5074342033dc26ace69eb0e5eb72876d43.jar
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:532
- 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:4592
- C:\Windows\SYSTEM32\cmd.exe
  cmd /c schtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\361868581afd0fa1eaed8c46990eee5074342033dc26ace69eb0e5eb72876d43.jar"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4696
- - C:\Windows\system32\schtasks.exe
    schtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\361868581afd0fa1eaed8c46990eee5074342033dc26ace69eb0e5eb72876d43.jar"
    3⤵
    - Creates scheduled task(s)
    PID:64
- 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\361868581afd0fa1eaed8c46990eee5074342033dc26ace69eb0e5eb72876d43.jar"
  2⤵
  - Drops file in Program Files directory
  PID:4036

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Defense Evasion

File and Directory Permissions Modification

T1222

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

361868581afd0fa1eaed8c46990eee5074342033dc26ace69eb0e5eb72876d43.jar

Path C:\ProgramData\Microsoft\Windows\Start Menu\Programs\StartUp\361868581afd0fa1eaed8c46990eee5074342033dc26ace69eb0e5eb72876d43.jar
Size 64KB
SHA256 361868581afd0fa1eaed8c46990eee5074342033dc26ace69eb0e5eb72876d43
MD5 2dc3ec1f2b21887d14f66045a1bf312f
SHA1 ee559cc3e69ca0c429d13576e086e2dcba323332
SHA512 d68443266a0e5ef08fcd72d8bf0cdd3d17914f57c6fbd37e0eaf648b4dff406c4c2e55a3b2daa6dbeddc9ad656971b3dbb0b635caff65d9d28c60ea986682812
SSDEEP 1536:S59vZVcVMHH45oJxm4UxtOPLpMy09xHrd3W4UB:SjZnHY5IctOPLpU04UB
MD5 SHA1 SHA512 SSDEEP

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3903daac9bc4a3b7.timestamp

Path C:\ProgramData\Oracle\Java\.oracle_jre_usage\3903daac9bc4a3b7.timestamp
Size 46B
SHA256 fddadd2ecebf79fa6eb7ee54c70a556e38665c31aba0d73bd5a745403aefca3e
MD5 80f368e7aa1baa451e803af0f634a01f
SHA1 0e4271fa36158fa95042612989405143068636fa
SHA512 f2bd8e3eb605306f2a73207d2ffcbceb2619129c9078cfd858ab81050301346b0c452ce4f24308e7b7ae414e73f588f4897ee059e0b633c077473205351643eb
MD5 SHA1 SHA512

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memory/532-32-0x000001F000290000-0x000001F0002A0000-memory.dmp

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memory/532-33-0x000001F0002B0000-0x000001F0002C0000-memory.dmp

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memory/532-12-0x000001F07AFC0000-0x000001F07AFC1000-memory.dmp

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memory/532-30-0x000001F07AFC0000-0x000001F07AFC1000-memory.dmp

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memory/532-29-0x000001F000000000-0x000001F001000000-memory.dmp

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memory/532-31-0x000001F000280000-0x000001F000290000-memory.dmp

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memory/532-4-0x000001F000000000-0x000001F001000000-memory.dmp

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memory/532-18-0x000001F000000000-0x000001F001000000-memory.dmp

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memory/532-34-0x000001F0002C0000-0x000001F0002D0000-memory.dmp

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memory/532-35-0x000001F0002D0000-0x000001F0002E0000-memory.dmp

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memory/532-37-0x000001F0002F0000-0x000001F000300000-memory.dmp

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memory/532-39-0x000001F000000000-0x000001F001000000-memory.dmp

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memory/532-52-0x000001F000000000-0x000001F001000000-memory.dmp

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memory/4036-43-0x000001FB40050000-0x000001FB41050000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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