1621dbc1ba1fb655350be8b062311d823ddf51d9880f0a6d93b58184b46d600e

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
31/05/2024, 20:27

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General

Target

2024-05-31_53a2668143f5e807d3d60adab893e8d3_cryptolocker.exe
Size

90KB
MD5

53a2668143f5e807d3d60adab893e8d3
SHA1

5060b5ffee8d8d20b803eafc3f9c33f27cf0eb5a
SHA256

1621dbc1ba1fb655350be8b062311d823ddf51d9880f0a6d93b58184b46d600e
SHA512

efd5e21570a51c1689a149de058e058130ca4e828d9b2cc2b0dbcf3d0a688e13ab946ee7272321ed1ad2466b76787e29455052f4b9a54143112b13acd8d52221
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAyE:n6a+1SEOtEvwDpjYYvQd2PN

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral1/memory/2920-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000d00000001232e-11.dat	CryptoLocker_rule2
behavioral1/memory/2920-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3056-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral1/memory/2920-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000d00000001232e-11.dat	CryptoLocker_set1
behavioral1/memory/2920-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3056-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral1/memory/2920-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000d00000001232e-11.dat	UPX
behavioral1/memory/2920-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/3056-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
3056	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2920	2024-05-31_53a2668143f5e807d3d60adab893e8d3_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2920-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000d00000001232e-11.dat	upx
behavioral1/memory/2920-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/3056-27-0x0000000000500000-0x0000000000510000-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 2920 wrote to memory of 3056	2920	2024-05-31_53a2668143f5e807d3d60adab893e8d3_cryptolocker.exe	28
PID 2920 wrote to memory of 3056	2920	2024-05-31_53a2668143f5e807d3d60adab893e8d3_cryptolocker.exe	28
PID 2920 wrote to memory of 3056	2920	2024-05-31_53a2668143f5e807d3d60adab893e8d3_cryptolocker.exe	28
PID 2920 wrote to memory of 3056	2920	2024-05-31_53a2668143f5e807d3d60adab893e8d3_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-31_53a2668143f5e807d3d60adab893e8d3_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-31_53a2668143f5e807d3d60adab893e8d3_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2920
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3056

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
91KB

MD5
0d3b122650833e4e59e188ea7c642d53

SHA1
b7fc5a0bd3d5496810288083b84aad3f540fba17

SHA256
f9c704a5956a4d701acf043e9289d738892871ee3aefe0fe4898022a1491cd5c

SHA512
9a3db6485db9c8928a5b3bc654652ba4460ab1a6dbedc9cb4efcdc02a943160aba18d064e6e22edbe24267ffd4e058588ae237254f4f35a13140d8010780de1c

Download Submit
memory/2920-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2920-1-0x00000000001C0000-0x00000000001C6000-memory.dmp

Filesize
24KB

Download
memory/2920-9-0x00000000001C0000-0x00000000001C6000-memory.dmp

Filesize
24KB

Download
memory/2920-2-0x00000000003F0000-0x00000000003F6000-memory.dmp

Filesize
24KB

Download
memory/2920-16-0x0000000002270000-0x0000000002280000-memory.dmp

Filesize
64KB

Download
memory/2920-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2920-26-0x0000000002270000-0x0000000002280000-memory.dmp

Filesize
64KB

Download
memory/3056-25-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/3056-18-0x0000000000370000-0x0000000000376000-memory.dmp

Filesize
24KB

Download
memory/3056-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

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