b84619e3cd3e786b49a5a90cc61e06153ea52ff3fef4dfcbddcd7dd7e5b024fb

Analysis

max time kernel
137s
max time network
146s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
13/03/2024, 04:26

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General

Target

2024-03-13_0e40e6d3908c32cfe329822ebd7d3e32_cryptolocker.exe
Size

118KB
MD5

0e40e6d3908c32cfe329822ebd7d3e32
SHA1

db4b5172d6b96e79322504316d10da3313508276
SHA256

b84619e3cd3e786b49a5a90cc61e06153ea52ff3fef4dfcbddcd7dd7e5b024fb
SHA512

1f649d37ea59f807f3545d2208947d0e0e1841db5d3653761aa284741df64cdcf5415297c5483bc62fd762bfaf6cf8c8bb4cbf37d9521ff8843f315a58f9a446
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwNgp01ZNY:z6a+CdOOtEvwDpjcz6

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2352-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000d00000001225b-11.dat	CryptoLocker_rule2
behavioral1/memory/2352-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2548-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2548-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2352-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000d00000001225b-11.dat	CryptoLocker_set1
behavioral1/memory/2352-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2548-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2548-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2352-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000d00000001225b-11.dat	UPX
behavioral1/memory/2352-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2548-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2548-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2548	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2352	2024-03-13_0e40e6d3908c32cfe329822ebd7d3e32_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2352-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000d00000001225b-11.dat	upx
behavioral1/memory/2352-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2548-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2548-26-0x0000000000500000-0x0000000000510000-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 4 IoCs

description	pid	Process	procid_target
PID 2352 wrote to memory of 2548	2352	2024-03-13_0e40e6d3908c32cfe329822ebd7d3e32_cryptolocker.exe	28
PID 2352 wrote to memory of 2548	2352	2024-03-13_0e40e6d3908c32cfe329822ebd7d3e32_cryptolocker.exe	28
PID 2352 wrote to memory of 2548	2352	2024-03-13_0e40e6d3908c32cfe329822ebd7d3e32_cryptolocker.exe	28
PID 2352 wrote to memory of 2548	2352	2024-03-13_0e40e6d3908c32cfe329822ebd7d3e32_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-13_0e40e6d3908c32cfe329822ebd7d3e32_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-13_0e40e6d3908c32cfe329822ebd7d3e32_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2352
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2548

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
118KB

MD5
8e741630db440b1c30f2f726acab29f4

SHA1
7cff77bd03fe4b7f56788f8237a92881bcf95936

SHA256
27157bb2921595f1ccfd32adf74c38bb92a479a5f0764758900e9eaee013d362

SHA512
5d2e7b7a248396b34fcff88b85c42a7d78054a0c4d5c2663bbd7a42463efba125f25cba6a19e899b882f7a52945caf844263e3fb89123f217ac068107807b999

Download Submit
memory/2352-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2352-1-0x0000000000230000-0x0000000000236000-memory.dmp

Filesize
24KB

Download
memory/2352-2-0x0000000000260000-0x0000000000266000-memory.dmp

Filesize
24KB

Download
memory/2352-9-0x0000000000230000-0x0000000000236000-memory.dmp

Filesize
24KB

Download
memory/2352-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2548-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2548-18-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/2548-20-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2548-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download