8c23fb2a9edd2c6b0a45ee2bc134a005d5f91e6abb334e955cea0579eaf34403

General

Target

2024-05-14_80939618aee2469ac2b334ed4c85a2ba_cryptolocker.exe
Size

65KB
MD5

80939618aee2469ac2b334ed4c85a2ba
SHA1

1df431c94890f8a6ff3c354c62ef83f93fcd7738
SHA256

8c23fb2a9edd2c6b0a45ee2bc134a005d5f91e6abb334e955cea0579eaf34403
SHA512

f15deef628045a69d8cac1469307a4d0d4b455eb7dfdea5b5502239f9a4ed8b8c5e5ffbe1b2a706892153cd14f532675e3e71cdcfc53ce3808548a1c5b876eda
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYZ8xG:1nK6a+qdOOtEvwDpjk

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1772-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0009000000023595-13.dat	CryptoLocker_rule2
behavioral2/memory/1508-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1772-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1508-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/1772-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0009000000023595-13.dat	CryptoLocker_set1
behavioral2/memory/1508-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/1772-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/1508-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/1772-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x0009000000023595-13.dat	UPX
behavioral2/memory/1508-16-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/1772-18-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/1508-27-0x0000000000500000-0x000000000050F311-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-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	2024-05-14_80939618aee2469ac2b334ed4c85a2ba_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1508	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1772-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x0009000000023595-13.dat	upx
behavioral2/memory/1508-16-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/1772-18-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/1508-27-0x0000000000500000-0x000000000050F311-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 1772 wrote to memory of 1508	1772	2024-05-14_80939618aee2469ac2b334ed4c85a2ba_cryptolocker.exe	89
PID 1772 wrote to memory of 1508	1772	2024-05-14_80939618aee2469ac2b334ed4c85a2ba_cryptolocker.exe	89
PID 1772 wrote to memory of 1508	1772	2024-05-14_80939618aee2469ac2b334ed4c85a2ba_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-05-14_80939618aee2469ac2b334ed4c85a2ba_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-14_80939618aee2469ac2b334ed4c85a2ba_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1772
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1508

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=3764,i,13544508926340531097,6671217806016090640,262144 --variations-seed-version --mojo-platform-channel-handle=4260 /prefetch:8
1⤵
PID:2700

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

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
66KB

MD5
45c68298c23b71fcefe670ffd49724c7

SHA1
a5267e2f37a53bca4e18482eb7aaca22db6a3d67

SHA256
42c232bf36143cc79db8670bfdcb7b486c42f1a587c56046bac93e7e69f6400b

SHA512
8d20026fbdf2614714577c37ddf1152403cd3c253d34e81e9b1a85102044317ab96db5b129e21fbb4041b0a2a1d352c4ad94225d76d0de1d5c939a485f389330

Download Submit
memory/1508-16-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1508-20-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/1508-26-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/1508-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1772-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1772-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1772-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1772-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1772-18-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download

Analysis

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