16512770eb74b8a655e747a260302126936ca1d426ed79d9fd7aadd371317579

Analysis

max time kernel
138s
max time network
140s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
20/07/2024, 23:15

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General

Target

killer.exe
Size

166KB
MD5

7b3a7907f0489945935bd78d6a8c8df7
SHA1

09baf051a0fcbfec678f5962678ef1041d06b325
SHA256

16512770eb74b8a655e747a260302126936ca1d426ed79d9fd7aadd371317579
SHA512

c6da2f2d19b1f195ba738b619daf0db54d1384678c2b97a13760f6e72315b10dfe0eed228b0a777e2ba7e487306a400d202d48b16271c5880e2e4ad6030f5082
SSDEEP

3072:oahKyd2n3175GWp1icKAArDZz4N9GhbkrNEk+5fJ3qa1qtzF:oahOTp0yN90QE0

Score

6^/10

persistence

Malware Config

Signatures

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\wextract_cleanup0 = "rundll32.exe C:\\Windows\\system32\\advpack.dll,DelNodeRunDLL32 \"C:\\Users\\Admin\\AppData\\Local\\Temp\\IXP000.TMP\\\""	killer.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
59	ipinfo.io

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
4656	NOTEPAD.EXE

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4656	NOTEPAD.EXE

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 1136 wrote to memory of 4364	1136	killer.exe	84
PID 1136 wrote to memory of 4364	1136	killer.exe	84
PID 4364 wrote to memory of 3868	4364	cmd.exe	86
PID 4364 wrote to memory of 3868	4364	cmd.exe	86
PID 4364 wrote to memory of 4236	4364	cmd.exe	106
PID 4364 wrote to memory of 4236	4364	cmd.exe	106
PID 4364 wrote to memory of 2248	4364	cmd.exe	107
PID 4364 wrote to memory of 2248	4364	cmd.exe	107
PID 4364 wrote to memory of 1680	4364	cmd.exe	108
PID 4364 wrote to memory of 1680	4364	cmd.exe	108
PID 4364 wrote to memory of 1324	4364	cmd.exe	109
PID 4364 wrote to memory of 1324	4364	cmd.exe	109
PID 4364 wrote to memory of 2400	4364	cmd.exe	110
PID 4364 wrote to memory of 2400	4364	cmd.exe	110
PID 4364 wrote to memory of 2312	4364	cmd.exe	111
PID 4364 wrote to memory of 2312	4364	cmd.exe	111
PID 4364 wrote to memory of 3412	4364	cmd.exe	112
PID 4364 wrote to memory of 3412	4364	cmd.exe	112
PID 4364 wrote to memory of 1492	4364	cmd.exe	113
PID 4364 wrote to memory of 1492	4364	cmd.exe	113
PID 4364 wrote to memory of 2216	4364	cmd.exe	114
PID 4364 wrote to memory of 2216	4364	cmd.exe	114
PID 4364 wrote to memory of 3504	4364	cmd.exe	115
PID 4364 wrote to memory of 3504	4364	cmd.exe	115

C:\Users\Admin\AppData\Local\Temp\killer.exe
"C:\Users\Admin\AppData\Local\Temp\killer.exe"
1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1136
- C:\Windows\SYSTEM32\cmd.exe
  cmd /c "killer.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4364
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:3868
- - C:\Windows\system32\curl.exe
    curl -s ipinfo.io/1.1.1.1
    3⤵
    PID:4236
- - C:\Windows\system32\findstr.exe
    findstr /R /C:"\"city\":" /C:"\"postal\":" /C:"\"country\":" /C:"\"loc\":" /C:"\"timezone\":"
    3⤵
    PID:2248
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /S /D /c" echo "
    3⤵
    PID:1680
- - C:\Windows\system32\findstr.exe
    findstr /r /i /c:"^$[0-9]\{1,3\}\.$\{3\}[0-9]\{1,3\}$"
    3⤵
    PID:1324
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /S /D /c" echo "
    3⤵
    PID:2400
- - C:\Windows\system32\findstr.exe
    findstr /r /i /c:"^$[0-9]\{1,3\}\.$\{3\}[0-9]\{1,3\}$"
    3⤵
    PID:2312
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /S /D /c" echo "
    3⤵
    PID:3412
- - C:\Windows\system32\findstr.exe
    findstr /r /i /c:"^$[0-9]\{1,3\}\.$\{3\}[0-9]\{1,3\}$"
    3⤵
    PID:1492
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /S /D /c" echo "
    3⤵
    PID:2216
- - C:\Windows\system32\findstr.exe
    findstr /r /i /c:"^$[0-9]\{1,3\}\.$\{3\}[0-9]\{1,3\}$"
    3⤵
    PID:3504

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:3048

C:\Windows\System32\NOTEPAD.EXE
"C:\Windows\System32\NOTEPAD.EXE" C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\killer.bat
1⤵
- Opens file in notepad (likely ransom note)
- Suspicious use of FindShellTrayWindow
PID:4656

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\IXP000.TMP\killer.bat

Filesize
12KB

MD5
8ca095c00bed0f626ecfeb9d008b47cc

SHA1
582a3ffa8e1daa39b724af58abba84b679b4c937

SHA256
8c53f3acac40a6269c54c7428828f550dd7c3ce5eea5ff51bf54bd3e7db42032

SHA512
afc87aad633305c812ed03fb1f3da02e4f9f49c3d5a3a467cde25ce855ba0db86f75ac4f393f5e8f07b3694dd412ab63a70afc986e7ccfcd348f5624622a6936

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads