0aa466f46a72ccdb4b2efd40bd80953dab932b6b6dd8c8c0e9ee1c43d3b51996

General

Target

2024-05-22_e6b953dab53384bc793c8317d9c8e632_cryptolocker.exe
Size

59KB
MD5

e6b953dab53384bc793c8317d9c8e632
SHA1

d2da865db208efd23abdc944244fd08d1fc6f5fb
SHA256

0aa466f46a72ccdb4b2efd40bd80953dab932b6b6dd8c8c0e9ee1c43d3b51996
SHA512

b36d2fa39a126f2109f82cbd0e64fe107b41c857aecf3958b2fd37e775f537e29893de120362f3250db504361de2b365c94e0b5251cb878ea5a66deb43868870
SSDEEP

768:H6LsoEEeegiZPvEhHSG+gk5NQXtckstOOtEvwDpjhBaD3TUogs/VXpAP6pF:H6QFElP6n+gou9cvMOtEvwDpjCpVXr

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4552-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/1400-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4552-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1400-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4552-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/1400-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4552-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1400-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4552-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/1400-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4552-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1400-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-22_e6b953dab53384bc793c8317d9c8e632_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	2024-05-22_e6b953dab53384bc793c8317d9c8e632_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

1400 asih.exe

pid	process
1400	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4552-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/1400-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4552-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1400-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-22_e6b953dab53384bc793c8317d9c8e632_cryptolocker.exe

description	pid	process	target process
PID 4552 wrote to memory of 1400	4552	2024-05-22_e6b953dab53384bc793c8317d9c8e632_cryptolocker.exe	asih.exe
PID 4552 wrote to memory of 1400	4552	2024-05-22_e6b953dab53384bc793c8317d9c8e632_cryptolocker.exe	asih.exe
PID 4552 wrote to memory of 1400	4552	2024-05-22_e6b953dab53384bc793c8317d9c8e632_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_e6b953dab53384bc793c8317d9c8e632_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_e6b953dab53384bc793c8317d9c8e632_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4552

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:1400

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4176,i,5711962389779687290,1245653010537220991,262144 --variations-seed-version --mojo-platform-channel-handle=4084 /prefetch:8
1⤵
PID:2896

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
60KB

MD5
1dfbe031111e98098a70d4c469ff64cf

SHA1
30cf66c4a5dc77225c14a176d00851d9a0055780

SHA256
070e24cb5192d81d9bfd1aee85491a0f42be103eb418f98449ff654fc7b456e8

SHA512
a95753899c2466d04eee06b540fe9e354ef8c4cab042edb3234a0ae37e435aed65a025b539ca4a7c932a7e4c672f7861945135d375174537ee68d12a399c4795

Download Submit
memory/1400-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1400-26-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1400-20-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/1400-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4552-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4552-1-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/4552-3-0x0000000000650000-0x0000000000656000-memory.dmp

Filesize
24KB

Download
memory/4552-9-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/4552-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads