ce68b6e12521e3fdb126cba388e98b3ebeda44b4751339e57fb2a9a532af21aa

General

Target

2024-05-21_4f26203729e8b75dcb7fa88269997e52_cryptolocker.exe
Size

60KB
MD5

4f26203729e8b75dcb7fa88269997e52
SHA1

9802af3e4ab140739481f241ca6a881cccc27d2e
SHA256

ce68b6e12521e3fdb126cba388e98b3ebeda44b4751339e57fb2a9a532af21aa
SHA512

3084699a47f05f37d3b0d77da48aa181c0ee7aee70f163d54d19c78749f5b472873d003f4cad5b58e6c2fb804eeafb77d358e75924aa78b9dafa0b2c856e72ce
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj9aYaUf3I:z6a+CdOOtEvwDpjQz

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4636-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/4636-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2704-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2704-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4636-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/4636-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2704-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2704-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4636-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/4636-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2704-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2704-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-21_4f26203729e8b75dcb7fa88269997e52_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	2024-05-21_4f26203729e8b75dcb7fa88269997e52_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2704 asih.exe

pid	process
2704	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4636-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/4636-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2704-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2704-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-21_4f26203729e8b75dcb7fa88269997e52_cryptolocker.exe

description	pid	process	target process
PID 4636 wrote to memory of 2704	4636	2024-05-21_4f26203729e8b75dcb7fa88269997e52_cryptolocker.exe	asih.exe
PID 4636 wrote to memory of 2704	4636	2024-05-21_4f26203729e8b75dcb7fa88269997e52_cryptolocker.exe	asih.exe
PID 4636 wrote to memory of 2704	4636	2024-05-21_4f26203729e8b75dcb7fa88269997e52_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_4f26203729e8b75dcb7fa88269997e52_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_4f26203729e8b75dcb7fa88269997e52_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4636

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2704

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=4456,i,2607710392823067546,4648797561512801463,262144 --variations-seed-version --mojo-platform-channel-handle=1304 /prefetch:8
1⤵
PID:3204

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
60KB

MD5
ae3ef3d953486e45cef8cb665a4ea776

SHA1
55d206b70b3790cd24b8b6c75a2b8692064f64fa

SHA256
4b37cf42d58b2ebb59ab80b1114a6223fe5d8bf4ae928d289323a21b1d8d4db9

SHA512
6c78350508f51fe40b0dfb9b7d8dd32fdbe2d10dfb4af379544d7809fbf9e29e8807ef964e33e4bc05def581550ea20e3ba044af92ec1253ed67918f02c2461b

Download Submit
memory/2704-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2704-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2704-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2704-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4636-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4636-1-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/4636-2-0x0000000000680000-0x0000000000686000-memory.dmp

Filesize
24KB

Download
memory/4636-9-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/4636-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads