576182b2e5e008a4575dc682931f12f5a859b6c2e3e319dc1deac1ae097864ef

General

Target

2024-06-01_3eb14a8c2575ab87c309f0e492e7a0d0_cryptolocker.exe
Size

39KB
MD5

3eb14a8c2575ab87c309f0e492e7a0d0
SHA1

1afdf81188dc1d32f6c17cfa4013c095aca533c5
SHA256

576182b2e5e008a4575dc682931f12f5a859b6c2e3e319dc1deac1ae097864ef
SHA512

9ef0bccb6c514588402a45c95a2fc9b789e0bbd6acca33a7324b261eb10a11d14b7246fb55d8f30f4f3f255199d5a2e553767489b146919f46f8800da2c68b05
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYabD/X:qDdFJy3QMOtEvwDpjjWMl7Td3

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4336-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0009000000023537-13.dat	CryptoLocker_rule2
behavioral2/memory/2652-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4336-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2652-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/4336-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0009000000023537-13.dat	CryptoLocker_set1
behavioral2/memory/2652-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4336-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2652-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4336-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0009000000023537-13.dat	UPX
behavioral2/memory/2652-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4336-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2652-28-0x0000000000500000-0x0000000000510000-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-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	2024-06-01_3eb14a8c2575ab87c309f0e492e7a0d0_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2652	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4336-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0009000000023537-13.dat	upx
behavioral2/memory/2652-19-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4336-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2652-28-0x0000000000500000-0x0000000000510000-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 4336 wrote to memory of 2652	4336	2024-06-01_3eb14a8c2575ab87c309f0e492e7a0d0_cryptolocker.exe	90
PID 4336 wrote to memory of 2652	4336	2024-06-01_3eb14a8c2575ab87c309f0e492e7a0d0_cryptolocker.exe	90
PID 4336 wrote to memory of 2652	4336	2024-06-01_3eb14a8c2575ab87c309f0e492e7a0d0_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-06-01_3eb14a8c2575ab87c309f0e492e7a0d0_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-01_3eb14a8c2575ab87c309f0e492e7a0d0_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4336
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2652

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=1280,i,1697479186275492802,18058102846092193784,262144 --variations-seed-version --mojo-platform-channel-handle=4408 /prefetch:8
1⤵
PID:1428

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
39KB

MD5
2a61ef2fc5223eac8fff94f56f5c33ad

SHA1
9974b76f5278fce2fe1c2ed98ea743fad16a6cb3

SHA256
57bc8f3ad1de495ed46d74ac12a7ead108b28e9dff30618a21803f6bd42a23c1

SHA512
6ffb7cac7936733c2a0721986d9e0efb79d23fe6312327bb44b574dcb0beec17109197bd06326fc669aa53883a6afcf24ab84a591e92b975a083bc96bf60516e

Download Submit
memory/2652-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2652-21-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/2652-27-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/2652-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4336-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4336-1-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4336-2-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4336-3-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/4336-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

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