4091f8d4726c7cb069ea2b4cae6f395a994ab7b1803c056d17b71654f834a99b

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
28/02/2024, 11:09

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-02-28_cf0a805d8e587caaed039ff83b48cb2a_cryptolocker.exe
Size

88KB
MD5

cf0a805d8e587caaed039ff83b48cb2a
SHA1

859b014661a39c753e747ad5766b3498c92af921
SHA256

4091f8d4726c7cb069ea2b4cae6f395a994ab7b1803c056d17b71654f834a99b
SHA512

b52acd4ae99e96d304b8305b2eee2f9bdf1a7f9245b8d52d6c823a175d397e510e057439c99bf4adf1a989c23a27aaa00409396d69997952ae2387f9e930e821
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMg8Wm:AnBdOOtEvwDpj6ze

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2572-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000001ebc7-13.dat	CryptoLocker_rule2
behavioral2/memory/2572-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1756-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2572-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000001ebc7-13.dat	CryptoLocker_set1
behavioral2/memory/2572-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1756-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2572-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000700000001ebc7-13.dat	UPX
behavioral2/memory/2572-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/1756-26-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\Control Panel\International\Geo\Nation	2024-02-28_cf0a805d8e587caaed039ff83b48cb2a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1756	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2572-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000700000001ebc7-13.dat	upx
behavioral2/memory/2572-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/1756-26-0x0000000000500000-0x000000000050F000-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 3 IoCs

description	pid	Process	procid_target
PID 2572 wrote to memory of 1756	2572	2024-02-28_cf0a805d8e587caaed039ff83b48cb2a_cryptolocker.exe	88
PID 2572 wrote to memory of 1756	2572	2024-02-28_cf0a805d8e587caaed039ff83b48cb2a_cryptolocker.exe	88
PID 2572 wrote to memory of 1756	2572	2024-02-28_cf0a805d8e587caaed039ff83b48cb2a_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-02-28_cf0a805d8e587caaed039ff83b48cb2a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-28_cf0a805d8e587caaed039ff83b48cb2a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2572
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1756

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
88KB

MD5
54c5bbad8446a820587d2153fb09d5e1

SHA1
94940543a29682526d66ca64ebf8689b41d515a1

SHA256
26a07382e391361cae2c4b83a2811f65e369604f5a7499be393ee034d38fe2e0

SHA512
7a6310c9a6fa4ff688d3bc8ae5da17bea5bc716acf7d20ed326d0b6624f4871e3359de93e62be147178e98c385aa7a8adda5296ebc95fcec4ffe2637bfce3b13

Download Submit
memory/1756-21-0x0000000000690000-0x0000000000696000-memory.dmp

Filesize
24KB

Download
memory/1756-19-0x0000000000740000-0x0000000000746000-memory.dmp

Filesize
24KB

Download
memory/1756-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2572-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2572-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2572-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2572-3-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/2572-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download