830d6840bb0b87ef485edd9f68e964d51fca96aae0fc018d8cc546d42a35f193

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
04-04-2024 19:52

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General

Target

2024-04-04_606466be7f6d1b8edba9b9fa389f2c76_cryptolocker.exe
Size

36KB
MD5

606466be7f6d1b8edba9b9fa389f2c76
SHA1

2e8eff789cd1a6a99053d1138f3e1020ed99419f
SHA256

830d6840bb0b87ef485edd9f68e964d51fca96aae0fc018d8cc546d42a35f193
SHA512

16e46ab88102037a2fde69e3a4bdecb04e96e74c46595015187092727e246dc56fbc6be41eaa69f7ad119448ea17f8d62dbef369159ac6a5b0f5a5b01aacc8dd
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY3:qDdFJy3QMOtEvwDpjjWMl7TW

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/624-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000a0000000231ff-13.dat	CryptoLocker_rule2
behavioral2/memory/624-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1488-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/624-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000a0000000231ff-13.dat	CryptoLocker_set1
behavioral2/memory/624-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1488-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/624-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000a0000000231ff-13.dat	UPX
behavioral2/memory/624-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1488-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3270530367-132075249-2153716227-1000\Control Panel\International\Geo\Nation	2024-04-04_606466be7f6d1b8edba9b9fa389f2c76_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1488	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/624-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000a0000000231ff-13.dat	upx
behavioral2/memory/624-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1488-26-0x0000000000500000-0x0000000000510000-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

description	pid	Process	procid_target
PID 624 wrote to memory of 1488	624	2024-04-04_606466be7f6d1b8edba9b9fa389f2c76_cryptolocker.exe	86
PID 624 wrote to memory of 1488	624	2024-04-04_606466be7f6d1b8edba9b9fa389f2c76_cryptolocker.exe	86
PID 624 wrote to memory of 1488	624	2024-04-04_606466be7f6d1b8edba9b9fa389f2c76_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-04-04_606466be7f6d1b8edba9b9fa389f2c76_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-04_606466be7f6d1b8edba9b9fa389f2c76_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:624
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1488

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
99127c2c987a57d4020d4c9a982f2fbc

SHA1
c49418b47713c60d77acd2624b56035b4f7ab90a

SHA256
8869bac94c20856423bdde31968641fbf90ed9955d4b88b45385c8de15395575

SHA512
bbbe098d6708e26530f68b2b8790ef53887cc0e2c6906109ff1c668afd8435484d185c0df24e596e6f2e641a95039d92a51134f65c17f33712ee4792a95e5c45

Download Submit
memory/624-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/624-1-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/624-2-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/624-3-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/624-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1488-19-0x0000000000760000-0x0000000000766000-memory.dmp

Filesize
24KB

Download
memory/1488-25-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/1488-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download