e11521cba469a4d16ffccbeb921cea8ea30086af47f7ec48953c3772f10d9631

General

Target

2024-02-29_8d725fa5748b774a4b45a4945f403723_cryptolocker.exe
Size

126KB
MD5

8d725fa5748b774a4b45a4945f403723
SHA1

17469d33c0db5e0ebf0af63b9883d47d573faaf0
SHA256

e11521cba469a4d16ffccbeb921cea8ea30086af47f7ec48953c3772f10d9631
SHA512

80216b388c08c3aa54b77142d7c0dea8177948a94a1c3c491a7aaeb3e8c4fe54b00051a849d69aca8dde0d7c7c8ae33790121bc53e1e7dd260fd2ddbdf85d92f
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp699GNtL1es:AnBdOOtEvwDpj6zi

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3708-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000b00000002324b-13.dat	CryptoLocker_rule2
behavioral2/memory/5080-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3708-22-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5080-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/3708-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000b00000002324b-13.dat	CryptoLocker_set1
behavioral2/memory/5080-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3708-22-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/5080-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/3708-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000b00000002324b-13.dat	UPX
behavioral2/memory/5080-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/3708-22-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/5080-27-0x0000000000500000-0x000000000050F000-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-02-29_8d725fa5748b774a4b45a4945f403723_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5080	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3708-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000b00000002324b-13.dat	upx
behavioral2/memory/5080-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/3708-22-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/5080-27-0x0000000000500000-0x000000000050F000-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 3708 wrote to memory of 5080	3708	2024-02-29_8d725fa5748b774a4b45a4945f403723_cryptolocker.exe	96
PID 3708 wrote to memory of 5080	3708	2024-02-29_8d725fa5748b774a4b45a4945f403723_cryptolocker.exe	96
PID 3708 wrote to memory of 5080	3708	2024-02-29_8d725fa5748b774a4b45a4945f403723_cryptolocker.exe	96

C:\Users\Admin\AppData\Local\Temp\2024-02-29_8d725fa5748b774a4b45a4945f403723_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-29_8d725fa5748b774a4b45a4945f403723_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3708
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:5080

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 --mojo-platform-channel-handle=3972 --field-trial-handle=2276,i,11674642242468042059,14711253743544118298,262144 --variations-seed-version /prefetch:8
1⤵
PID:456

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
126KB

MD5
632cbc2452358af9be4229b8cd198831

SHA1
4b0c2472c3f9a565a25bddbc8a53b30390fde8e7

SHA256
1055308fe02aa81ef3aee084524b2163013fbe8e3e832cd7ebc26d0c8c19f4bf

SHA512
117fa501ff07c80fea80d69c9dc2072878fb231a57e2fe8fcb20931626bfba0e49c4de62f76191d4d0e7ae72192e9dff0eb4585ef30768c53fce1101cd95b572

Download Submit
memory/3708-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3708-1-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/3708-2-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/3708-3-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/3708-22-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/5080-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/5080-19-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/5080-23-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/5080-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download

Analysis

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