8889e2c67a18e42d7374f8f0e4801f4874ee0e5c862e49742d047209e678fecc

General

Target

2024-03-27_2a14d5e99040b29ee134510565e5ca37_cryptolocker.exe
Size

127KB
MD5

2a14d5e99040b29ee134510565e5ca37
SHA1

9a4dd56f34635f98eba56360f4cd46a51ead5e43
SHA256

8889e2c67a18e42d7374f8f0e4801f4874ee0e5c862e49742d047209e678fecc
SHA512

7a1ba083d450074cffbcba2d5ce6166705979d0bb73bfdeb1ac952bf0fb17a46e6954e79d6214fda1fd19f77f134cde19933b451c90dbeb8e398f86cc9ff84b1
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp699GNtL1ebb:AnBdOOtEvwDpj6zN

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/2196-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x0009000000014abe-11.dat	CryptoLocker_rule2
behavioral1/memory/2196-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2172-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2196-13-0x0000000002320000-0x000000000232F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2172-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/2196-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x0009000000014abe-11.dat	CryptoLocker_set1
behavioral1/memory/2196-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2172-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2196-13-0x0000000002320000-0x000000000232F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2172-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/2196-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/files/0x0009000000014abe-11.dat	UPX
behavioral1/memory/2196-15-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2172-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2196-13-0x0000000002320000-0x000000000232F000-memory.dmp	UPX
behavioral1/memory/2172-27-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2172	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2196	2024-03-27_2a14d5e99040b29ee134510565e5ca37_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2196-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/files/0x0009000000014abe-11.dat	upx
behavioral1/memory/2196-15-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2172-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2196-13-0x0000000002320000-0x000000000232F000-memory.dmp	upx
behavioral1/memory/2172-27-0x0000000000500000-0x000000000050F000-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 4 IoCs

description	pid	Process	procid_target
PID 2196 wrote to memory of 2172	2196	2024-03-27_2a14d5e99040b29ee134510565e5ca37_cryptolocker.exe	28
PID 2196 wrote to memory of 2172	2196	2024-03-27_2a14d5e99040b29ee134510565e5ca37_cryptolocker.exe	28
PID 2196 wrote to memory of 2172	2196	2024-03-27_2a14d5e99040b29ee134510565e5ca37_cryptolocker.exe	28
PID 2196 wrote to memory of 2172	2196	2024-03-27_2a14d5e99040b29ee134510565e5ca37_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-27_2a14d5e99040b29ee134510565e5ca37_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-27_2a14d5e99040b29ee134510565e5ca37_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2196
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2172

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
127KB

MD5
0f973dbb1b41e8019756490b69e5ce81

SHA1
8cadee28347051a585bf891e216d290d7d396c67

SHA256
789d9893c5886500cfcf1c68b1685f40285db7e48c192ca8ac4938830eecaca5

SHA512
13104417a44bb0c183a97ad3c4403098b46ab26c45c67c868bb9305ee1f70ed534df2012260a1348a912c2bc975ad29bd24efe3af5a43d7914efdd1930b7dbad

Download Submit
memory/2172-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2172-19-0x0000000000310000-0x0000000000316000-memory.dmp

Filesize
24KB

Download
memory/2172-26-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2172-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2196-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2196-1-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2196-2-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/2196-3-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2196-15-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2196-13-0x0000000002320000-0x000000000232F000-memory.dmp

Filesize
60KB

Download

Analysis

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