63f61cc3f925c2fde3a85a5ab4216e83d661c7ff113d0a93880ade956b03c70e

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
22/05/2024, 06:00

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General

Target

2024-05-22_a5f8cc602876612217b18e06e3e2a9d5_cryptolocker.exe
Size

91KB
MD5

a5f8cc602876612217b18e06e3e2a9d5
SHA1

4809902355c17a3dc37d6b0782edd3ec56222162
SHA256

63f61cc3f925c2fde3a85a5ab4216e83d661c7ff113d0a93880ade956b03c70e
SHA512

34a4d6714f845f1afd4ae0f1cab23325b76567d15601197e3840090b0e75fab76066603a43ff9dbcfae2b63e8afa69283b23970a779008c4898d819662fd92a9
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAA/DO:n6a+1SEOtEvwDpjYYvQd2PZ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4344-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023283-13.dat	CryptoLocker_rule2
behavioral2/memory/4344-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1344-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4344-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023283-13.dat	CryptoLocker_set1
behavioral2/memory/4344-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1344-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4344-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023283-13.dat	UPX
behavioral2/memory/4344-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1344-26-0x0000000000500000-0x0000000000510000-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-1-5-21-540404634-651139247-2967210625-1000\Control Panel\International\Geo\Nation	2024-05-22_a5f8cc602876612217b18e06e3e2a9d5_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1344	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4344-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0007000000023283-13.dat	upx
behavioral2/memory/4344-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1344-26-0x0000000000500000-0x0000000000510000-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 3 IoCs

description	pid	Process	procid_target
PID 4344 wrote to memory of 1344	4344	2024-05-22_a5f8cc602876612217b18e06e3e2a9d5_cryptolocker.exe	82
PID 4344 wrote to memory of 1344	4344	2024-05-22_a5f8cc602876612217b18e06e3e2a9d5_cryptolocker.exe	82
PID 4344 wrote to memory of 1344	4344	2024-05-22_a5f8cc602876612217b18e06e3e2a9d5_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-22_a5f8cc602876612217b18e06e3e2a9d5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_a5f8cc602876612217b18e06e3e2a9d5_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4344
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1344

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

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Downloads

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

Filesize
91KB

MD5
cd14f152dca7c0ae87fa2891b6cf516c

SHA1
61ac9165f9080b39a84ea818d17d61009fd13692

SHA256
a5e039a24c5664175ef71f7c63e952faa586e981f2197c5c7c634408ede069e2

SHA512
45cff9a546f978a8276fadfe2d8b0ad42689d967cb391af2dbe256a43813feee2939159e00e84a820f490a7947fa99b3f2eb64849c08e6d7b6696dade447bfcb

Download Submit
memory/1344-19-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/1344-25-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/1344-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4344-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4344-1-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/4344-2-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/4344-9-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/4344-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download