f8fe14418220afc5a0715d0403562fa5fe4de7a9b19de95e68aa7ffa10905502

Analysis

max time kernel
119s
max time network
121s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
30/12/2023, 17:10

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General

Target

034439a3903a3cb01290ef335311072f.exe
Size

14KB
MD5

034439a3903a3cb01290ef335311072f
SHA1

9ecd86b339bb6451315439b29f27b8cc3f45d3cd
SHA256

f8fe14418220afc5a0715d0403562fa5fe4de7a9b19de95e68aa7ffa10905502
SHA512

96df9fc21bb2ef296a8379ac6a3e14674b266be470359583400936744736c676fca6f0e36f395c525817ab94a30cf19e0a40f538fedd6198677773e6c3510049
SSDEEP

384:kKtBT+TlFk7akcmfc9+Ces4BpFN0dWhiYrHox3lMf:kgBqhFkFcmUH2QduJf

Score

10^/10

persistence

Malware Config

Signatures

Adds autorun key to be loaded by Explorer.exe on startup 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad\jcxvnrlq.dll = "{21BE5FDF-D4CB-4850-AD99-21E68B50BF3F}"	034439a3903a3cb01290ef335311072f.exe

Deletes itself 1 IoCs

pid	Process
2624	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
2532	034439a3903a3cb01290ef335311072f.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\jcxvnrlq.tmp	034439a3903a3cb01290ef335311072f.exe
File opened for modification	C:\Windows\SysWOW64\jcxvnrlq.tmp	034439a3903a3cb01290ef335311072f.exe
File opened for modification	C:\Windows\SysWOW64\jcxvnrlq.nls	034439a3903a3cb01290ef335311072f.exe

Modifies registry class 4 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{21BE5FDF-D4CB-4850-AD99-21E68B50BF3F}\InProcServer32\ = "C:\\Windows\\SysWow64\\jcxvnrlq.dll"	034439a3903a3cb01290ef335311072f.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{21BE5FDF-D4CB-4850-AD99-21E68B50BF3F}\InProcServer32\ThreadingModel = "Apartment"	034439a3903a3cb01290ef335311072f.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{21BE5FDF-D4CB-4850-AD99-21E68B50BF3F}	034439a3903a3cb01290ef335311072f.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{21BE5FDF-D4CB-4850-AD99-21E68B50BF3F}\InProcServer32	034439a3903a3cb01290ef335311072f.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2532	034439a3903a3cb01290ef335311072f.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2532	034439a3903a3cb01290ef335311072f.exe
2532	034439a3903a3cb01290ef335311072f.exe
2532	034439a3903a3cb01290ef335311072f.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2532 wrote to memory of 2624	2532	034439a3903a3cb01290ef335311072f.exe	28
PID 2532 wrote to memory of 2624	2532	034439a3903a3cb01290ef335311072f.exe	28
PID 2532 wrote to memory of 2624	2532	034439a3903a3cb01290ef335311072f.exe	28
PID 2532 wrote to memory of 2624	2532	034439a3903a3cb01290ef335311072f.exe	28

C:\Users\Admin\AppData\Local\Temp\034439a3903a3cb01290ef335311072f.exe
"C:\Users\Admin\AppData\Local\Temp\034439a3903a3cb01290ef335311072f.exe"
1⤵
- Adds autorun key to be loaded by Explorer.exe on startup
- Loads dropped DLL
- Drops file in System32 directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2532
- C:\Windows\SysWOW64\cmd.exe
  cmd /c C:\Users\Admin\AppData\Local\Temp\820B.tmp.bat
  2⤵
  - Deletes itself
  PID:2624

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\820B.tmp.bat

Filesize
179B

MD5
f5a0dc92847106dca5b5fdf7d74c0e0c

SHA1
7742fc9619ab7483334420b0d11ef76f959a32d8

SHA256
b0cf4c97013fd6b43f88a8e1d6eef8930ec7f726e5aec55b473c089e149605e5

SHA512
7c67252109b774c0592072df31f9d51315320d9e7ffdceeb056f9d34b72f4f9cc2f5f20a5e0913015c0b0baf28193bbfc25d792879b52a9e1e1c3fd4c3675a47

Download Submit
\Windows\SysWOW64\jcxvnrlq.dll

Filesize
717KB

MD5
7c6444e92ceadfc1924bf38735dd678a

SHA1
34ffab9a2f2c3543f3e8e5b1d94aa1226a716e2b

SHA256
24a9d07c76f06a7f0907bdb432bbdbdcc32a5cf7f28674df94ad532837966cbc

SHA512
9d256df3c3c98ea4e2651699ff3766894014416e2402780b66fecb3e80cb1ecd16265222c7d960e07ef31f47f45fea0382ed4d9a0d0cfb81ede733eba11750de

Download Submit
memory/2532-12-0x0000000020000000-0x0000000020008000-memory.dmp

Filesize
32KB

Download
memory/2532-21-0x0000000020000000-0x0000000020008000-memory.dmp

Filesize
32KB

Download