fba2e95bdd9f062fa33e62ccd3167713e58a188ae4dd6a3f9e2b5d53da50e5f5

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
04-02-2024 15:24

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General

Target

2024-02-04_21db4b1730c3df6d93cf76e45cc64cdc_cryptolocker.exe
Size

54KB
MD5

21db4b1730c3df6d93cf76e45cc64cdc
SHA1

a25c6bdb6533e67af88d914306199bc040e7b822
SHA256

fba2e95bdd9f062fa33e62ccd3167713e58a188ae4dd6a3f9e2b5d53da50e5f5
SHA512

075b9f84bb3896d9286e1b8409fb1610ac372173d01cf84a3c1b38958eeafe34c866439b58a110c525ec3ab7043fe8789793e54795b2995d04b3cbecfe9719c8
SSDEEP

768:79inqyNR/QtOOtEvwDpjBK/iVTab3GRuv3VylSV/CdMFQ:79mqyNhQMOtEvwDpjBPY7xv3g8ZFQ

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2396-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023202-13.dat	CryptoLocker_rule2
behavioral2/memory/2396-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3984-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2396-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023202-13.dat	CryptoLocker_set1
behavioral2/memory/2396-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3984-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

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-1-5-21-768304381-2824894965-3840216961-1000\Control Panel\International\Geo\Nation	2024-02-04_21db4b1730c3df6d93cf76e45cc64cdc_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3984	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 2396 wrote to memory of 3984	2396	2024-02-04_21db4b1730c3df6d93cf76e45cc64cdc_cryptolocker.exe	85
PID 2396 wrote to memory of 3984	2396	2024-02-04_21db4b1730c3df6d93cf76e45cc64cdc_cryptolocker.exe	85
PID 2396 wrote to memory of 3984	2396	2024-02-04_21db4b1730c3df6d93cf76e45cc64cdc_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-02-04_21db4b1730c3df6d93cf76e45cc64cdc_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-04_21db4b1730c3df6d93cf76e45cc64cdc_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2396
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3984

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
54KB

MD5
8ff044002df296aede932098b7a2f60a

SHA1
94575a6bcce5684cffbd512f533dddf6b15b8bcb

SHA256
69b75ac04d6e536bb0fa8e35fa310dbfc81daa0ed4a26e3361eb9087be063871

SHA512
2a1996efa432a387d4bce1ec6b9f22c8cfd6e582c52bdc997c66e75d24ac52da7e4b5b59173c419fb0fc69cc2e675333b47b362d340d980b1a595360f2a7e345

Download Submit
memory/2396-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2396-1-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/2396-2-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/2396-3-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/2396-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3984-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3984-20-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/3984-26-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download