9d1ab01c78d8d2e7b67f52748e50ba3ccab2a072dac158e0c2d78869f4203554

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
10/04/2024, 02:47

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General

Target

2024-04-10_811d0ddd5a0805bc779fc963f37e0285_cryptolocker.exe
Size

118KB
MD5

811d0ddd5a0805bc779fc963f37e0285
SHA1

17d1e85becd0c8925b9229196ffc24ac6300a559
SHA256

9d1ab01c78d8d2e7b67f52748e50ba3ccab2a072dac158e0c2d78869f4203554
SHA512

794f0c34991461748facf464019e3953fb53542bbd01ce34806fd7be21061db107bda88c65e6b07eba39cf55ccbfb9e5c3751cadd8dba6be412adbd6ecdb996c
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwNgp01hC:z6a+CdOOtEvwDpjczO

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3268-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000a00000001e735-13.dat	CryptoLocker_rule2
behavioral2/memory/516-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3268-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/516-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/3268-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000a00000001e735-13.dat	CryptoLocker_set1
behavioral2/memory/516-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3268-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/516-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/3268-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000a00000001e735-13.dat	UPX
behavioral2/memory/516-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3268-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/516-27-0x0000000000500000-0x0000000000510000-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-1-5-21-566096764-1992588923-1249862864-1000\Control Panel\International\Geo\Nation	2024-04-10_811d0ddd5a0805bc779fc963f37e0285_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
516	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3268-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000a00000001e735-13.dat	upx
behavioral2/memory/516-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3268-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/516-27-0x0000000000500000-0x0000000000510000-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 3268 wrote to memory of 516	3268	2024-04-10_811d0ddd5a0805bc779fc963f37e0285_cryptolocker.exe	89
PID 3268 wrote to memory of 516	3268	2024-04-10_811d0ddd5a0805bc779fc963f37e0285_cryptolocker.exe	89
PID 3268 wrote to memory of 516	3268	2024-04-10_811d0ddd5a0805bc779fc963f37e0285_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-04-10_811d0ddd5a0805bc779fc963f37e0285_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-10_811d0ddd5a0805bc779fc963f37e0285_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3268
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:516

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
118KB

MD5
9159c65f2acac893dfb8cfff3ab7cb02

SHA1
0d1063084e49fb2e9c8e0c8a25989304e683fa14

SHA256
e2c4ded9eaba19209dfa26886aec65b338f7eacd053f2c764d401ca69ba2a015

SHA512
639f98a81f928563c5147799b9bb16c5892374f0537df4175ef687206709e4845a3b1e20619b386b93e04aae03cdad10c3c982896b48899d599bfd7d9e55e692

Download Submit
memory/516-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/516-21-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/516-20-0x0000000000690000-0x0000000000696000-memory.dmp

Filesize
24KB

Download
memory/516-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3268-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3268-1-0x0000000000550000-0x0000000000556000-memory.dmp

Filesize
24KB

Download
memory/3268-2-0x0000000000550000-0x0000000000556000-memory.dmp

Filesize
24KB

Download
memory/3268-3-0x0000000000570000-0x0000000000576000-memory.dmp

Filesize
24KB

Download
memory/3268-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download