957561abe0f4265767360ee5f77f816bb4f85377405cb70f9ea52f9269fd273d

Analysis

max time kernel
117s
max time network
123s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
22-07-2024 17:15

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

641088ff4e53e78d20df0da2d391c151_JaffaCakes118.exe
Size

450KB
MD5

641088ff4e53e78d20df0da2d391c151
SHA1

d254e5d4c89087b2ce1f81b643b4e9f0e15acd96
SHA256

957561abe0f4265767360ee5f77f816bb4f85377405cb70f9ea52f9269fd273d
SHA512

b66ebd7a3fe75c6d8572fa357a6e6b0f78dbedc7dc0886a365eff47f73490f1915f1bc9c6107d3903d921c5820ad9e8b30837830b63248754817ddb5c48e0021
SSDEEP

12288:LAnnvbOZVDCC2x0NlnlazCQaZUEb5DhJzUZa:LSnqG2lM4F1Lg

Score

7^/10

upx

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4968	Krynua.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3820-0-0x0000000000400000-0x0000000000472000-memory.dmp	upx
behavioral2/files/0x0009000000023455-11.dat	upx

Drops file in Windows directory 6 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Tasks\{62C40AA6-4406-467a-A5A5-DFDF1B559B7A}.job	641088ff4e53e78d20df0da2d391c151_JaffaCakes118.exe
File created	C:\Windows\Krynua.exe	641088ff4e53e78d20df0da2d391c151_JaffaCakes118.exe
File opened for modification	C:\Windows\Krynua.exe	641088ff4e53e78d20df0da2d391c151_JaffaCakes118.exe
File created	C:\Windows\Tasks\{62C40AA6-4406-467a-A5A5-DFDF1B559B7A}.job	Krynua.exe
File opened for modification	C:\Windows\Tasks\{62C40AA6-4406-467a-A5A5-DFDF1B559B7A}.job	Krynua.exe
File created	C:\Windows\Tasks\{62C40AA6-4406-467a-A5A5-DFDF1B559B7A}.job	641088ff4e53e78d20df0da2d391c151_JaffaCakes118.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
133776	4968	WerFault.exe	87

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1705699165-553239100-4129523827-1000\Software\Microsoft\Internet Explorer\Main	Krynua.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe
4968	Krynua.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
3820	641088ff4e53e78d20df0da2d391c151_JaffaCakes118.exe
4968	Krynua.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3820 wrote to memory of 4968	3820	641088ff4e53e78d20df0da2d391c151_JaffaCakes118.exe	87
PID 3820 wrote to memory of 4968	3820	641088ff4e53e78d20df0da2d391c151_JaffaCakes118.exe	87
PID 3820 wrote to memory of 4968	3820	641088ff4e53e78d20df0da2d391c151_JaffaCakes118.exe	87

C:\Users\Admin\AppData\Local\Temp\641088ff4e53e78d20df0da2d391c151_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\641088ff4e53e78d20df0da2d391c151_JaffaCakes118.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:3820
- C:\Windows\Krynua.exe
  C:\Windows\Krynua.exe
  2⤵
  - Executes dropped EXE
  - Drops file in Windows directory
  - Modifies Internet Explorer settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  PID:4968
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4968 -s 756
    3⤵
    - Program crash
    PID:133776

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 4968 -ip 4968
1⤵
PID:61076

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Windows\Krynua.exe

Filesize
450KB

MD5
641088ff4e53e78d20df0da2d391c151

SHA1
d254e5d4c89087b2ce1f81b643b4e9f0e15acd96

SHA256
957561abe0f4265767360ee5f77f816bb4f85377405cb70f9ea52f9269fd273d

SHA512
b66ebd7a3fe75c6d8572fa357a6e6b0f78dbedc7dc0886a365eff47f73490f1915f1bc9c6107d3903d921c5820ad9e8b30837830b63248754817ddb5c48e0021

Download Submit
C:\Windows\Tasks\{62C40AA6-4406-467a-A5A5-DFDF1B559B7A}.job

Filesize
390B

MD5
6a61a443e2a52f5ae4d6dad6bbf544e8

SHA1
35274ae1012668532208492a4cc814051f378faa

SHA256
951d53d49a193775b5be0adf0ea8cf0b371c499006bebde1da4287db6412ba44

SHA512
832c1d084e44c737b70a8de6258f802b1e3744a64f857ecebdd3667d47b550fb2c0e87d4c0203bba4d5897475dbe101763d339594673a19eb2c9a3772cbf21d1

Download Submit
memory/3820-0-0x0000000000400000-0x0000000000472000-memory.dmp

Filesize
456KB

Download
memory/3820-1-0x0000000000402000-0x0000000000403000-memory.dmp

Filesize
4KB

Download
memory/3820-2-0x00000000005A0000-0x00000000005A1000-memory.dmp

Filesize
4KB

Download
memory/3820-3-0x0000000000400000-0x0000000000472000-memory.dmp

Filesize
456KB

Download
memory/3820-6-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/4968-17-0x0000000000400000-0x0000000000472000-memory.dmp

Filesize
456KB

Download
memory/4968-18-0x0000000000400000-0x0000000000472000-memory.dmp

Filesize
456KB

Download
memory/4968-22-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/4968-142056-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download