8e773ff162c9c380da2d68736cb343dcb0bb46942c8dd418c0f063fa4345207a

Analysis

max time kernel
148s
max time network
148s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
02/05/2024, 01:02

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General

Target

2024-05-02_a4fa9de8350ebb0b85e76bbce3a658c1_cryptolocker.exe
Size

38KB
MD5

a4fa9de8350ebb0b85e76bbce3a658c1
SHA1

66051cf13dafdcbec642bb67415e4d692a8e27da
SHA256

8e773ff162c9c380da2d68736cb343dcb0bb46942c8dd418c0f063fa4345207a
SHA512

2359da2d9c47b0d2c84797b3432ec731caeafc31f33eeb0a9af19264747a39980701580be1e71a1d124ae0dccaf4928103904df15f1f5a27132ab50f416ba0ff
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaBc:qDdFJy3QMOtEvwDpjjWMl7TdW

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1988-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b000000014ef8-11.dat	CryptoLocker_rule2
behavioral1/memory/1988-13-0x0000000002AC0000-0x0000000002AD0000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1988-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2932-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/1988-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b000000014ef8-11.dat	CryptoLocker_set1
behavioral1/memory/1988-13-0x0000000002AC0000-0x0000000002AD0000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1988-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2932-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1988-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000b000000014ef8-11.dat	UPX
behavioral1/memory/1988-13-0x0000000002AC0000-0x0000000002AD0000-memory.dmp	UPX
behavioral1/memory/1988-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2932-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2932	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1988	2024-05-02_a4fa9de8350ebb0b85e76bbce3a658c1_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1988-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000b000000014ef8-11.dat	upx
behavioral1/memory/1988-13-0x0000000002AC0000-0x0000000002AD0000-memory.dmp	upx
behavioral1/memory/1988-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2932-27-0x0000000000500000-0x0000000000510000-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

description	pid	Process	procid_target
PID 1988 wrote to memory of 2932	1988	2024-05-02_a4fa9de8350ebb0b85e76bbce3a658c1_cryptolocker.exe	28
PID 1988 wrote to memory of 2932	1988	2024-05-02_a4fa9de8350ebb0b85e76bbce3a658c1_cryptolocker.exe	28
PID 1988 wrote to memory of 2932	1988	2024-05-02_a4fa9de8350ebb0b85e76bbce3a658c1_cryptolocker.exe	28
PID 1988 wrote to memory of 2932	1988	2024-05-02_a4fa9de8350ebb0b85e76bbce3a658c1_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-02_a4fa9de8350ebb0b85e76bbce3a658c1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-02_a4fa9de8350ebb0b85e76bbce3a658c1_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1988
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2932

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

Replay Monitor

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Downloads

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

Filesize
38KB

MD5
52f228ab6bee7f6966da494ea1b26605

SHA1
9a7225400f68f53dfc3578d98b0d9057cf72d806

SHA256
b4f7d270df2423150eaac836a37647b63c2677b6cd92fa79e80b10ceffdc8523

SHA512
90ac9ee94f3687ba97f3ac19d5728ca08935444515777b16fcf35721618e418423c90b66d2ade3d33cd112ac6664b0eaae6aae21331c5a485de9316bd5bf5ff1

Download Submit
memory/1988-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1988-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1988-2-0x0000000000340000-0x0000000000346000-memory.dmp

Filesize
24KB

Download
memory/1988-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1988-13-0x0000000002AC0000-0x0000000002AD0000-memory.dmp

Filesize
64KB

Download
memory/1988-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2932-19-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/2932-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2932-26-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download