af0a6ac2c71b1e59f886bf9721412eaf72e9e206494a4d23702924fc48303f2f

Analysis

max time kernel
149s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
25-05-2024 05:34

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General

Target

2024-05-25_822b2a4961ed63c00b14507856e2b00a_cryptolocker.exe
Size

52KB
MD5

822b2a4961ed63c00b14507856e2b00a
SHA1

af97a3bad9e776bb0c26fc9aca14f5f563b8ec13
SHA256

af0a6ac2c71b1e59f886bf9721412eaf72e9e206494a4d23702924fc48303f2f
SHA512

5a29d66d53e61a2651246173b59c5aa60bf23c983204e01591cbf6debcb0d7ae6c8b587091ac555edc49a72d708d310ef8ef99acb31927caf956351ca2715429
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YY1J+OTOm0:z6QFElP6n+gKmddpMOtEvwDpj31im0

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4880-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0006000000023288-13.dat	CryptoLocker_rule2
behavioral2/memory/1464-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4880-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1464-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/4880-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0006000000023288-13.dat	CryptoLocker_set1
behavioral2/memory/1464-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4880-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1464-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4880-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0006000000023288-13.dat	UPX
behavioral2/memory/1464-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4880-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1464-27-0x0000000000500000-0x0000000000510000-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-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation	2024-05-25_822b2a4961ed63c00b14507856e2b00a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1464	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4880-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0006000000023288-13.dat	upx
behavioral2/memory/1464-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4880-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1464-27-0x0000000000500000-0x0000000000510000-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 3 IoCs

description	pid	Process	procid_target
PID 4880 wrote to memory of 1464	4880	2024-05-25_822b2a4961ed63c00b14507856e2b00a_cryptolocker.exe	82
PID 4880 wrote to memory of 1464	4880	2024-05-25_822b2a4961ed63c00b14507856e2b00a_cryptolocker.exe	82
PID 4880 wrote to memory of 1464	4880	2024-05-25_822b2a4961ed63c00b14507856e2b00a_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-25_822b2a4961ed63c00b14507856e2b00a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-25_822b2a4961ed63c00b14507856e2b00a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4880
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1464

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
52KB

MD5
6f835598845cb2d5dd60c447b27e6424

SHA1
58c14cad3e7c9ec58bf466e6aa6ba368a2a8753b

SHA256
14b91ed1b60b6a51f263c3fc7fb4e0c72a8eca0ed5a67004eba349eb82e0ca63

SHA512
bbf1c55f76b6b8e7b02e6b1e1bd6509cff616843d81793afc0d19b093cf642e2a2ed8956ca75032c263975d7f6bdfa6f6d4d211a385ffbb66fec5e279e67f1c9

Download Submit
memory/1464-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1464-20-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/1464-26-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/1464-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4880-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4880-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4880-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4880-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4880-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download