ce1a59ec54d8f878d390ba294fcd7c09485b4b34ca84e7fbd04684078e9bd151

Analysis

max time kernel
142s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20230703-en
resource tags

arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
submitted
12-07-2023 06:53

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General

Target

nun.jar
Size

49KB
MD5

1ec26b2e83ccbffc6a8552d92d99a0da
SHA1

0158ee62d67584fcf1fe3d9665325762fbb1ee6e
SHA256

f3980210a51b33547b4fec31f77458036247dfcd12baca421eedc6bd4761aecf
SHA512

43d04bb614e170d3eda83d1783dbc58148b863e0c98cb10293c7a31bcae92ebdf55ad1a583336fbd005390d6fca13370f7a64a8b4a266f0d2aad53119aa01ff9
SSDEEP

768:BMoaNhfb2Ru7DBIJ/NxkRs8FmVyx468Bx7d+niXvh5913LQ5ip3+QEsZLHJ+x37M:EbyatImEZYENbQixEs5HJOI

Score

8^/10

evasion persistence

Malware Config

Signatures

Sets file to hidden 1 TTPs 2 IoCs

Modifies file attributes to stop it showing in Explorer etc.

evasion

Hidden Files and Directories

T1158

pid	Process
4968	attrib.exe
4200	attrib.exe

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\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\java = "\"C:\\Program Files\\Java\\jre1.8.0_66\\bin\\javaw.exe\" -jar \"C:\\Users\\Admin\\AppData\\Roaming\\java\\java.jar.7BW\""	reg.exe

Drops desktop.ini file(s) 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\java\Desktop.ini	java.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\java\Desktop.ini	attrib.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\tem	java.exe
File opened for modification	C:\Windows\tem	java.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
4924	reg.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2868	java.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2868 wrote to memory of 4924	2868	java.exe	86
PID 2868 wrote to memory of 4924	2868	java.exe	86
PID 2868 wrote to memory of 4200	2868	java.exe	91
PID 2868 wrote to memory of 4200	2868	java.exe	91
PID 2868 wrote to memory of 4968	2868	java.exe	88
PID 2868 wrote to memory of 4968	2868	java.exe	88
PID 2868 wrote to memory of 3644	2868	java.exe	92
PID 2868 wrote to memory of 3644	2868	java.exe	92

Views/modifies file attributes 1 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1158

pid	Process
4968	attrib.exe
4200	attrib.exe

C:\ProgramData\Oracle\Java\javapath\java.exe
java -jar C:\Users\Admin\AppData\Local\Temp\nun.jar
1⤵
- Drops desktop.ini file(s)
- Drops file in Windows directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2868
- C:\Windows\SYSTEM32\reg.exe
  reg add HKLM\Software\Microsoft\Windows\CurrentVersion\Run /v java /t REG_SZ /d "\"C:\Program Files\Java\jre1.8.0_66\bin\javaw.exe\" -jar \"C:\Users\Admin\AppData\Roaming\java\java.jar.7BW\"" /f
  2⤵
  - Adds Run key to start application
  - Modifies registry key
  PID:4924
- C:\Windows\SYSTEM32\attrib.exe
  attrib +s +h +r "C:\Users\Admin\AppData\Roaming\java"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:4968
- C:\Windows\SYSTEM32\attrib.exe
  attrib +s +h +r "C:\Users\Admin\AppData\Roaming\java\*.*"
  2⤵
  - Sets file to hidden
  - Drops desktop.ini file(s)
  - Views/modifies file attributes
  PID:4200
- C:\Program Files\Java\jre1.8.0_66\bin\javaw.exe
  "C:\Program Files\Java\jre1.8.0_66\bin\javaw.exe" -jar "C:\Users\Admin\AppData\Roaming\java\java.jar.7BW"
  2⤵
  PID:3644

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Hidden Files and Directories

T1158

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Hidden Files and Directories

T1158

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\.oracle_jre_usage\90737d32e3aba4b.timestamp

Filesize
50B

MD5
19bed309c80dc83c7191edd43b188a63

SHA1
b9322570e06c1a4f2410a09e24647650b1cf0de9

SHA256
786eb73a1882a97ddc299c1099a99391363658478f7c02d949b2d687f2e59f4b

SHA512
c3c63e0505fe04341caa010f03f5f3cacf81d0c8e82efbb0a08e255d40b0ca41c2a393a12a937bef504504b2ad611cd0ffc3b2f6a4a9e649db0819d4aed4a02e

Download Submit
C:\Users\Admin\AppData\Roaming\java\Desktop.ini

Filesize
63B

MD5
e783bdd20a976eaeaae1ff4624487420

SHA1
c2a44fab9df00b3e11582546b16612333c2f9286

SHA256
2f65fa9c7ed712f493782abf91467f869419a2f8b5adf23b44019c08190fa3f3

SHA512
8c883678e4625ef44f4885b8c6d7485196774f9cb0b9eee7dd18711749bcae474163df9965effcd13ecd1a33cd7265010c152f8504d6013e4f4d85d68a901a80

Download Submit
C:\Users\Admin\AppData\Roaming\java\java.jar.7BW

Filesize
49KB

MD5
1ec26b2e83ccbffc6a8552d92d99a0da

SHA1
0158ee62d67584fcf1fe3d9665325762fbb1ee6e

SHA256
f3980210a51b33547b4fec31f77458036247dfcd12baca421eedc6bd4761aecf

SHA512
43d04bb614e170d3eda83d1783dbc58148b863e0c98cb10293c7a31bcae92ebdf55ad1a583336fbd005390d6fca13370f7a64a8b4a266f0d2aad53119aa01ff9

Download Submit
C:\Users\Admin\rE35z0zNJO.tmp

Filesize
13B

MD5
cd61a17f454b8234367d1337e5959ca1

SHA1
e8706ecb1785b14788469b191e1820edd737d69a

SHA256
0c239d2563df602a6194d06e1c3ea5e18040698c27d415ff46d9914e76809f8e

SHA512
0daeafd251ccc7366ccf886832e0fb8eb29d897c8078c84e4ca6c84fda86985b7f7720e66311639b17b90df51f1020307fcaf7aa3722cd6f95bca3d0ca599af5

Download Submit
memory/2868-143-0x0000000002960000-0x0000000002961000-memory.dmp

Filesize
4KB

Download
memory/2868-154-0x0000000002960000-0x0000000002961000-memory.dmp

Filesize
4KB

Download
memory/3644-168-0x0000000000C50000-0x0000000000C51000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads