18da8da141aab16ad6eb102cf9da4b0c0719e213bb694b0ac2639d367d44d04f

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
24-05-2024 04:25

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General

Target

2024-05-24_2d596659f40f4cdb5dd44229dcb67b0a_cryptolocker.exe
Size

23KB
MD5

2d596659f40f4cdb5dd44229dcb67b0a
SHA1

40aba587ea4d534c2b645302fd68dca52b815490
SHA256

18da8da141aab16ad6eb102cf9da4b0c0719e213bb694b0ac2639d367d44d04f
SHA512

e3c1fc900620b5c210dee625ff4051c0eec09d956e1693cf8417c61fb2d4c61101333e38cf755ba0aaddd9a3cbb750e25fcf664ea58326c2639b627cfafd901e
SSDEEP

384:bVCPwFRuFn65arz1ZhdaXFXSCVQTLfjDp6HMJ3:bVCPwFRo6CpwXFXSqQXfjAsJ3

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2308-0-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\hasfj.exe	CryptoLocker_rule2
behavioral1/memory/2308-16-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2944-17-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2944-27-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2308-0-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\hasfj.exe	UPX
behavioral1/memory/2308-16-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral1/memory/2944-17-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral1/memory/2944-27-0x0000000008000000-0x000000000800E000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

hasfj.exe

pid process

2944 hasfj.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-24_2d596659f40f4cdb5dd44229dcb67b0a_cryptolocker.exe

pid process

2308 2024-05-24_2d596659f40f4cdb5dd44229dcb67b0a_cryptolocker.exe

pid	process
2944	hasfj.exe

pid	process
2308	2024-05-24_2d596659f40f4cdb5dd44229dcb67b0a_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2308-0-0x0000000008000000-0x000000000800E000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\hasfj.exe	upx
behavioral1/memory/2308-16-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral1/memory/2944-17-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral1/memory/2944-27-0x0000000008000000-0x000000000800E000-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-05-24_2d596659f40f4cdb5dd44229dcb67b0a_cryptolocker.exe

description	pid	process	target process
PID 2308 wrote to memory of 2944	2308	2024-05-24_2d596659f40f4cdb5dd44229dcb67b0a_cryptolocker.exe	hasfj.exe
PID 2308 wrote to memory of 2944	2308	2024-05-24_2d596659f40f4cdb5dd44229dcb67b0a_cryptolocker.exe	hasfj.exe
PID 2308 wrote to memory of 2944	2308	2024-05-24_2d596659f40f4cdb5dd44229dcb67b0a_cryptolocker.exe	hasfj.exe
PID 2308 wrote to memory of 2944	2308	2024-05-24_2d596659f40f4cdb5dd44229dcb67b0a_cryptolocker.exe	hasfj.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-24_2d596659f40f4cdb5dd44229dcb67b0a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-24_2d596659f40f4cdb5dd44229dcb67b0a_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2308
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:2944

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Local\Temp\hasfj.exe

Filesize
24KB

MD5
8e8c72afc7b4febf35fac23efb3715fe

SHA1
00a9f9b6ab8dd86d35a0afc7e1b563d075cea772

SHA256
e1aa9bf2315ed5a1ec54f8175250281a6b49a253f0afedbdcf07624337ea1af2

SHA512
ff054194d461d441066db8cf7b19fd6452868ea8155eaee65fe32da36b72f04e8165eda66b6de57a2a4c6c44d918d01d32f88de25437b90dfbdd8872704bd1c5

Download Submit
memory/2308-0-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/2308-1-0x00000000004C0000-0x00000000004C6000-memory.dmp

Filesize
24KB

Download
memory/2308-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2308-9-0x00000000004C0000-0x00000000004C6000-memory.dmp

Filesize
24KB

Download
memory/2308-16-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/2944-17-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/2944-26-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/2944-19-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/2944-27-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download