12fa2a56dbb9edb88415070b4b2a592d1f15641c718c64306a9b751b55fe63f4

Analysis

max time kernel
148s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
20/04/2024, 21:34

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General

Target

2024-04-20_91640a9aad847922b4480aa9b76751be_cryptolocker.exe
Size

49KB
MD5

91640a9aad847922b4480aa9b76751be
SHA1

1ab3cf050d199614e88512599b0bb5e986499392
SHA256

12fa2a56dbb9edb88415070b4b2a592d1f15641c718c64306a9b751b55fe63f4
SHA512

6c711614c25de391697ae7d26b96b002a4463909b774dff01ec8b87839f6ac65421d13eba16e0c15e004ad6d2ed5e981ccdb2bfd8d96a79d9d6db739a94a9a5c
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2Moc1:qmbhXDmjr5MOtEvwDpj5cDtKkQZQQ

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4708-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000001db0e-13.dat	CryptoLocker_rule2
behavioral2/memory/4708-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3796-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/4708-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3796-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4708-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000800000001db0e-13.dat	UPX
behavioral2/memory/4708-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3796-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1132431369-515282257-1998160155-1000\Control Panel\International\Geo\Nation	2024-04-20_91640a9aad847922b4480aa9b76751be_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3796	asih.exe

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 4708 wrote to memory of 3796	4708	2024-04-20_91640a9aad847922b4480aa9b76751be_cryptolocker.exe	85
PID 4708 wrote to memory of 3796	4708	2024-04-20_91640a9aad847922b4480aa9b76751be_cryptolocker.exe	85
PID 4708 wrote to memory of 3796	4708	2024-04-20_91640a9aad847922b4480aa9b76751be_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-04-20_91640a9aad847922b4480aa9b76751be_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-20_91640a9aad847922b4480aa9b76751be_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4708
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3796

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
49KB

MD5
a8678cff37931fbf7c53bc33d46d4143

SHA1
a6652dbd8cdf914c550d05efbc7c4467b5353f88

SHA256
06960e44c42809cd74a7e9a5d51c7ea93bd1285c5519bc755dab4b74f0e57c13

SHA512
a886c4897738f98a0796bbad17179b5ec564d0460862a82c913bef274af30b2653d2b34701f631a1d4f1266cb7ddf3a0d7c5c3256941240699c5dbd6c9624f86

Download Submit
memory/3796-19-0x0000000001F70000-0x0000000001F76000-memory.dmp

Filesize
24KB

Download
memory/3796-21-0x0000000001F50000-0x0000000001F56000-memory.dmp

Filesize
24KB

Download
memory/3796-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4708-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4708-1-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/4708-2-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/4708-3-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/4708-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download