b48cd1ed78d9f5db54b1ea0a08847355a2667b531be7d99cd5ea60c1146accdd

Analysis

max time kernel
149s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
19/03/2024, 00:38

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General

Target

2024-03-19_4c6f899a01c8ebaf622999c3823ce45b_cryptolocker.exe
Size

65KB
MD5

4c6f899a01c8ebaf622999c3823ce45b
SHA1

dadcfe886bc6228a5821cb948ec03edaa1547a49
SHA256

b48cd1ed78d9f5db54b1ea0a08847355a2667b531be7d99cd5ea60c1146accdd
SHA512

c451c38d5609486977e75e25942eb9e0549d17125e036a553dfe3e8466a3a9500a0231412bb94e8c05c564b0903b16c65c3d139f589a35b2d44b27ec0019f4de
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYjc3CBx:1nK6a+qdOOtEvwDpjsx

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/5072-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000400000002271f-13.dat	CryptoLocker_rule2
behavioral2/memory/5072-21-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2856-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/5072-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000400000002271f-13.dat	CryptoLocker_set1
behavioral2/memory/5072-21-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/2856-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/5072-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x000400000002271f-13.dat	UPX
behavioral2/memory/5072-21-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/2856-26-0x0000000000500000-0x000000000050F311-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-03-19_4c6f899a01c8ebaf622999c3823ce45b_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2856	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/5072-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x000400000002271f-13.dat	upx
behavioral2/memory/5072-21-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/2856-26-0x0000000000500000-0x000000000050F311-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 5072 wrote to memory of 2856	5072	2024-03-19_4c6f899a01c8ebaf622999c3823ce45b_cryptolocker.exe	98
PID 5072 wrote to memory of 2856	5072	2024-03-19_4c6f899a01c8ebaf622999c3823ce45b_cryptolocker.exe	98
PID 5072 wrote to memory of 2856	5072	2024-03-19_4c6f899a01c8ebaf622999c3823ce45b_cryptolocker.exe	98

C:\Users\Admin\AppData\Local\Temp\2024-03-19_4c6f899a01c8ebaf622999c3823ce45b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-19_4c6f899a01c8ebaf622999c3823ce45b_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5072
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2856

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=3780 --field-trial-handle=2900,i,14549994492153927475,12895178890800740987,262144 --variations-seed-version /prefetch:8
1⤵
PID:3340

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

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
65KB

MD5
2a42566b93ee39d8bcc6b35cb4269972

SHA1
86906d08e5adfd5110bc8dd474115c22ef793eac

SHA256
cce500a5b102fa1aa5c10ca11d7568e027255371f426b426c771112dceb23b7f

SHA512
e9291e33da8c38263547d31d3e7def2c758abf0fdfc3cfee394aa99c30409d974d33364dfb2c47ee0c72b89f9f428f7192f2d11e15818cb97230348c5c2a63b5

Download Submit
memory/2856-18-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/2856-19-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/2856-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/5072-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/5072-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/5072-2-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/5072-3-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/5072-21-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download