4bafd2a3f67ca8f4d9a0e653aeed945ff499a0221ff53300746eb4c09598a876

Analysis

max time kernel
147s
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
08-04-2024 12:47

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General

Target

2024-04-08_8f1b50272f7f152c276b070057f311e8_cryptolocker.exe
Size

36KB
MD5

8f1b50272f7f152c276b070057f311e8
SHA1

59eb5ecae2df65a64d1ff8c18d416b7e9b714376
SHA256

4bafd2a3f67ca8f4d9a0e653aeed945ff499a0221ff53300746eb4c09598a876
SHA512

5a2773fecb125afd370908befbc53ca62ee1ad69b58396458d24230f00e919927813522faf8c8fd37efc8ee123140157fdf82ab3a9a6a07e56f81e821b0c18eb
SSDEEP

768:qUmnjFom/kLyMro2GtOOtEvwDpjeMLam5ax+NO:qUmnpomddpMOtEvwDpjjaYa9

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1792-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00080000000231f7-13.dat	CryptoLocker_rule2
behavioral2/memory/1792-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1072-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1792-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00080000000231f7-13.dat	CryptoLocker_set1
behavioral2/memory/1792-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1072-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1792-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x00080000000231f7-13.dat	UPX
behavioral2/memory/1792-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/1072-26-0x0000000000500000-0x000000000050F000-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-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation	2024-04-08_8f1b50272f7f152c276b070057f311e8_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1072	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1792-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x00080000000231f7-13.dat	upx
behavioral2/memory/1792-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/1072-26-0x0000000000500000-0x000000000050F000-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 1792 wrote to memory of 1072	1792	2024-04-08_8f1b50272f7f152c276b070057f311e8_cryptolocker.exe	86
PID 1792 wrote to memory of 1072	1792	2024-04-08_8f1b50272f7f152c276b070057f311e8_cryptolocker.exe	86
PID 1792 wrote to memory of 1072	1792	2024-04-08_8f1b50272f7f152c276b070057f311e8_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-04-08_8f1b50272f7f152c276b070057f311e8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-08_8f1b50272f7f152c276b070057f311e8_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1792
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1072

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
36KB

MD5
a474a4c51bb8c9ee2c7f4e5667017a28

SHA1
0cf5fdf86d8c752fb18ecb8f5354913f1112fb7c

SHA256
80b4a56a95f672d208aa9fb642abc11bd711a356794d2762ea869330448c5b44

SHA512
db0c0cb6b10130f216cb7182cb4da405f4295e96ca4a273458794eb48f06163b252b2a3e93c78a724f815bf440264bbc6bea8aff540800a2ac7df1d4bb9bb147

Download Submit
memory/1072-21-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1072-19-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/1072-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1792-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1792-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1792-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1792-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1792-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download