f2a1bc980d1d377289fbdab0ee43b6766678c2b3cf2c6fd348af3720f3b3cc4f

Analysis

max time kernel
147s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
04/01/2024, 22:22

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General

Target

420eac7ea76416c718f9405e7fc93d44.exe
Size

14KB
MD5

420eac7ea76416c718f9405e7fc93d44
SHA1

c0bbbfe51dd7d6fc30acef13986709f0cd0f44ca
SHA256

f2a1bc980d1d377289fbdab0ee43b6766678c2b3cf2c6fd348af3720f3b3cc4f
SHA512

9ebf433f851cbe7efda350854ffdb8f1233b86c9aae562c75aae5058de8398686996c81d1cd62c150d4d8c2555050489a4d1cefe4d2d3610f16d06dec5f360c8
SSDEEP

384:3ohDW84sghLbZzdNt2asVmob+bCfyPf/CoXsakU:CW84sghLbZzFHvodfmfKocak

Score

8^/10

persistence upx

Malware Config

Signatures

Modifies AppInit DLL entries 2 TTPs
persistence

Registry Run Keys / Startup Folder
T1547.001

Modify Registry
T1112

Executes dropped EXE 1 IoCs

pid	Process
4816	wonlinsk.exe

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/2912-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x0007000000023213-5.dat	upx
behavioral2/memory/2912-6-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/4816-7-0x0000000000400000-0x0000000000411000-memory.dmp	upx

Drops file in System32 directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\wonlinsk.exe	420eac7ea76416c718f9405e7fc93d44.exe
File created	C:\Windows\SysWOW64\wonlins.dll	420eac7ea76416c718f9405e7fc93d44.exe
File created	C:\Windows\SysWOW64\wonlinsk.exe	420eac7ea76416c718f9405e7fc93d44.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2912 wrote to memory of 4816	2912	420eac7ea76416c718f9405e7fc93d44.exe	27
PID 2912 wrote to memory of 4816	2912	420eac7ea76416c718f9405e7fc93d44.exe	27
PID 2912 wrote to memory of 4816	2912	420eac7ea76416c718f9405e7fc93d44.exe	27
PID 2912 wrote to memory of 4752	2912	420eac7ea76416c718f9405e7fc93d44.exe	107
PID 2912 wrote to memory of 4752	2912	420eac7ea76416c718f9405e7fc93d44.exe	107
PID 2912 wrote to memory of 4752	2912	420eac7ea76416c718f9405e7fc93d44.exe	107

C:\Users\Admin\AppData\Local\Temp\420eac7ea76416c718f9405e7fc93d44.exe
"C:\Users\Admin\AppData\Local\Temp\420eac7ea76416c718f9405e7fc93d44.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:2912
- C:\Windows\SysWOW64\wonlinsk.exe
  C:\Windows\system32\wonlinsk.exe ˜‰
  2⤵
  - Executes dropped EXE
  PID:4816
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\420eac7ea76416c718f9405e7fc93d44.exe.bat
  2⤵
  PID:4752

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\420eac7ea76416c718f9405e7fc93d44.exe.bat

Filesize
182B

MD5
8615240ff9f59005cb6dfc4f78e23a55

SHA1
079d1462e90b07d1c12ccc973f064afd014a4f46

SHA256
61c6f7daa89074d59c9280927ab2d89240c2ec2a35063e423bd8da65a782df97

SHA512
56064b8e749e3e29e7e4945fbf78a7f8d191b46ed8585ba52529cc9c47d135610ee5f8d3ee345f9779e4709c0edb5127b52d35c7b382d1d2b9a10423d38fb36d

Download Submit
C:\Windows\SysWOW64\wonlinsk.exe

Filesize
14KB

MD5
420eac7ea76416c718f9405e7fc93d44

SHA1
c0bbbfe51dd7d6fc30acef13986709f0cd0f44ca

SHA256
f2a1bc980d1d377289fbdab0ee43b6766678c2b3cf2c6fd348af3720f3b3cc4f

SHA512
9ebf433f851cbe7efda350854ffdb8f1233b86c9aae562c75aae5058de8398686996c81d1cd62c150d4d8c2555050489a4d1cefe4d2d3610f16d06dec5f360c8

Download Submit
memory/2912-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2912-6-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/4816-7-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download