f63b933fa85861a184c207dc6cda157df46d3da4974b45a03d9834649ce7342b

General

Target

2024-05-02_1c3485549b4fc90a4253577f8ca056d6_cryptolocker.exe
Size

38KB
MD5

1c3485549b4fc90a4253577f8ca056d6
SHA1

211f3e8edd447958be249102588b2c20c5808a76
SHA256

f63b933fa85861a184c207dc6cda157df46d3da4974b45a03d9834649ce7342b
SHA512

cd2f47eaa13b34a97922803db9486624526c17f73e5fbdeab3f7aff86ab23b1d639070f51e52d79577358bc7ed54b415e3e0897b752e3d0e0f22832c1689c437
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYjB:qDdFJy3QMOtEvwDpjjWMl7TkB

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/1200-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b000000012271-11.dat	CryptoLocker_rule2
behavioral1/memory/1200-13-0x0000000000640000-0x0000000000650000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2976-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1200-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2976-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/1200-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b000000012271-11.dat	CryptoLocker_set1
behavioral1/memory/1200-13-0x0000000000640000-0x0000000000650000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2976-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1200-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2976-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/1200-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000b000000012271-11.dat	UPX
behavioral1/memory/1200-13-0x0000000000640000-0x0000000000650000-memory.dmp	UPX
behavioral1/memory/2976-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1200-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2976-28-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2976	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1200	2024-05-02_1c3485549b4fc90a4253577f8ca056d6_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1200-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000b000000012271-11.dat	upx
behavioral1/memory/1200-13-0x0000000000640000-0x0000000000650000-memory.dmp	upx
behavioral1/memory/2976-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1200-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2976-28-0x0000000000500000-0x0000000000510000-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 4 IoCs

description	pid	Process	procid_target
PID 1200 wrote to memory of 2976	1200	2024-05-02_1c3485549b4fc90a4253577f8ca056d6_cryptolocker.exe	28
PID 1200 wrote to memory of 2976	1200	2024-05-02_1c3485549b4fc90a4253577f8ca056d6_cryptolocker.exe	28
PID 1200 wrote to memory of 2976	1200	2024-05-02_1c3485549b4fc90a4253577f8ca056d6_cryptolocker.exe	28
PID 1200 wrote to memory of 2976	1200	2024-05-02_1c3485549b4fc90a4253577f8ca056d6_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-02_1c3485549b4fc90a4253577f8ca056d6_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-02_1c3485549b4fc90a4253577f8ca056d6_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1200
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2976

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
38KB

MD5
3589c67c82ac987f0a22412d20d15f5e

SHA1
d70c7e51f8e4468428624b9c5f905b33901e5a4f

SHA256
41fe2da981e77b1b4ee96176375c0d110edea5a3b9cbcb728e8151aab32cb0c0

SHA512
04aac67389966eb3f6a05804acbb1b4a5595e2fa4dab9acd796cbf1504b9eb1ef55f92959e20b12f53b1e17081d93838dde3c0b1708f434303ba59b6308e5bf8

Download Submit
memory/1200-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1200-1-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/1200-9-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/1200-2-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/1200-13-0x0000000000640000-0x0000000000650000-memory.dmp

Filesize
64KB

Download
memory/1200-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2976-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2976-27-0x00000000002D0000-0x00000000002D6000-memory.dmp

Filesize
24KB

Download
memory/2976-20-0x0000000000310000-0x0000000000316000-memory.dmp

Filesize
24KB

Download
memory/2976-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

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