033ec255cbb72271120c671064ee274629396fb46dfe8a15280f6e17520da751

Analysis

max time kernel
150s
max time network
153s
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, 11:30

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General

Target

2024-04-20_a3ea39257c8ed913cf58410f21726841_cryptolocker.exe
Size

68KB
MD5

a3ea39257c8ed913cf58410f21726841
SHA1

df6591c86b5c89ef9cd7622a8c2b58666f0bf211
SHA256

033ec255cbb72271120c671064ee274629396fb46dfe8a15280f6e17520da751
SHA512

64a87d8838c6275fa8faa87afc23448a3b77503cf3c51cf3377be0dfc78afbda245c47879d9c48f24bda860729d21ae051ff8016e0ee18e7b0c0e681391b75e9
SSDEEP

768:quVbxjgQNQXtckstOOtEvwDpjAaDOK6PsED3VK2+ZtyOjgO4r9vFAg2rq6W1A1Pw:quJu9cvMOtEvwDpjWYTjipvF2bx1PQAw

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3324-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000001db0e-13.dat	CryptoLocker_rule2
behavioral2/memory/3324-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4792-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3324-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000800000001db0e-13.dat	CryptoLocker_set1
behavioral2/memory/3324-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4792-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3324-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000800000001db0e-13.dat	UPX
behavioral2/memory/3324-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4792-26-0x0000000000500000-0x000000000050F000-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-1-5-21-1132431369-515282257-1998160155-1000\Control Panel\International\Geo\Nation	2024-04-20_a3ea39257c8ed913cf58410f21726841_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4792	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3324-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000800000001db0e-13.dat	upx
behavioral2/memory/3324-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4792-26-0x0000000000500000-0x000000000050F000-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 3324 wrote to memory of 4792	3324	2024-04-20_a3ea39257c8ed913cf58410f21726841_cryptolocker.exe	85
PID 3324 wrote to memory of 4792	3324	2024-04-20_a3ea39257c8ed913cf58410f21726841_cryptolocker.exe	85
PID 3324 wrote to memory of 4792	3324	2024-04-20_a3ea39257c8ed913cf58410f21726841_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-04-20_a3ea39257c8ed913cf58410f21726841_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-20_a3ea39257c8ed913cf58410f21726841_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3324
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4792

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
68KB

MD5
b903f27c3209bf09d9d2822665d9ef73

SHA1
8d9aaf14644b8a162cd7898de3487a75f9a4e4bf

SHA256
52d57849e90fe7fcea993d0ee5b4052e589b5211d80f8a757fdd1b960b8c4560

SHA512
9c36b13f9eb4dcba72c83c9ca782eb297f035b3a3f5a9d40ba3271059a77d3b316d2c892c76ae39e4946886e484e89039f890567d7fb1be39354e3fc0f254655

Download Submit
memory/3324-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3324-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/3324-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/3324-3-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/3324-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4792-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4792-22-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4792-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download