27e8c821e6360597fb400dc2513d1f7a98eb26a3fe58ee4f2bcf0cbc2a636da9

Analysis

max time kernel
145s
max time network
159s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
06/03/2024, 15:44

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General

Target

2024-03-06_a2a99b5d7bb819460524ebc45344ae4e_cryptolocker.exe
Size

47KB
MD5

a2a99b5d7bb819460524ebc45344ae4e
SHA1

1cdc53a7a133b4b30c91f83f1b4073653d12ec19
SHA256

27e8c821e6360597fb400dc2513d1f7a98eb26a3fe58ee4f2bcf0cbc2a636da9
SHA512

d73c00ccd0744680e1e5a202d429ad81735796fae464fd96d477e38b1c5375928d07797952aef9730f01896cf1da237a3d659e01e6fbdb727f78453cfa011734
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2Mo22u:qmbhXDmjr5MOtEvwDpj5cDtKkQZQJ1Y

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/740-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023228-13.dat	CryptoLocker_rule2
behavioral2/memory/1100-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/740-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1100-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/740-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1100-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/740-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023228-13.dat	UPX
behavioral2/memory/1100-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/740-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1100-27-0x0000000000500000-0x0000000000510000-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-1-5-21-3045580317-3728985860-206385570-1000\Control Panel\International\Geo\Nation	2024-03-06_a2a99b5d7bb819460524ebc45344ae4e_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1100	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 740 wrote to memory of 1100	740	2024-03-06_a2a99b5d7bb819460524ebc45344ae4e_cryptolocker.exe	88
PID 740 wrote to memory of 1100	740	2024-03-06_a2a99b5d7bb819460524ebc45344ae4e_cryptolocker.exe	88
PID 740 wrote to memory of 1100	740	2024-03-06_a2a99b5d7bb819460524ebc45344ae4e_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-03-06_a2a99b5d7bb819460524ebc45344ae4e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-06_a2a99b5d7bb819460524ebc45344ae4e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:740
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1100

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
47KB

MD5
5275ad029ebb9ec3dcbee0ee6da2af56

SHA1
376b99fef4d6c817b870cd43ea9df135a4960604

SHA256
e62de68ff8d93930557ebeb9c1bc780db41486b36f1e4eebfc9747881cc7e150

SHA512
49cfdbe59838bac65d21a2dbe5f293e2e1fcd0926e0065c18c062056f598ac890609ad44a5d84e27a8176bbdc1edfc0b8c28b07917b5415d5af1ee57f48b9f99

Download Submit
memory/740-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/740-1-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/740-2-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/740-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/740-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1100-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1100-20-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/1100-22-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/1100-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download