42d642e7c4261eeb3062b7e3505b6ac3162ed6a1536fd1e9b76235ae0f374d12

General

Target

2024-04-15_8aa4adbe995293359e31f19de4a47717_cryptolocker.exe
Size

99KB
MD5

8aa4adbe995293359e31f19de4a47717
SHA1

4deaada0bf91f7d1b43924ad92b6d0774704c493
SHA256

42d642e7c4261eeb3062b7e3505b6ac3162ed6a1536fd1e9b76235ae0f374d12
SHA512

5fbda0db4760ec2d39db9c12147e002868b18f7dafaa85893d14ba66b427bd2cb444a0bc8e8a9af937b833d28307a1df25a825a0eaec3210960527197f9ae507
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbbr/BKiX7w:z6a+CdOOtEvwDpjcY

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4156-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023261-13.dat	CryptoLocker_rule2
behavioral2/memory/2604-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4156-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2604-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/4156-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023261-13.dat	CryptoLocker_set1
behavioral2/memory/2604-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4156-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2604-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4156-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023261-13.dat	UPX
behavioral2/memory/2604-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4156-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2604-27-0x0000000000500000-0x0000000000510000-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-04-15_8aa4adbe995293359e31f19de4a47717_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2604	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4156-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000023261-13.dat	upx
behavioral2/memory/2604-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4156-19-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2604-27-0x0000000000500000-0x0000000000510000-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 4156 wrote to memory of 2604	4156	2024-04-15_8aa4adbe995293359e31f19de4a47717_cryptolocker.exe	89
PID 4156 wrote to memory of 2604	4156	2024-04-15_8aa4adbe995293359e31f19de4a47717_cryptolocker.exe	89
PID 4156 wrote to memory of 2604	4156	2024-04-15_8aa4adbe995293359e31f19de4a47717_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-04-15_8aa4adbe995293359e31f19de4a47717_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-15_8aa4adbe995293359e31f19de4a47717_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4156
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2604

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=1044 --field-trial-handle=2264,i,15001568551143786084,90255922961447677,262144 --variations-seed-version /prefetch:8
1⤵
PID:1120

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
99KB

MD5
7429a45947c5affd1a6f60db69061046

SHA1
cd0588333917589b695ec349b077153cffcdf80f

SHA256
d01f75c5b13e571de7744a99d7d8dbb9f2484ebaa09d8062486d0643d2f34cdb

SHA512
36ebf4d76160a878af46e6dbe6de38df4ad7af99cea2beae26422cc5c573cf6ffd0811f423012ca496ddfd45b4e157930ed17dd9815fe4757db1a3b4b55e6111

Download Submit
memory/2604-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2604-20-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/2604-21-0x0000000000570000-0x0000000000576000-memory.dmp

Filesize
24KB

Download
memory/2604-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4156-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4156-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4156-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4156-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4156-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

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