606250304f55e21f0f3a4ed0d3d0807f2fca7fb84b296417787b216ff66e6742

Analysis

max time kernel
148s
max time network
152s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
25/06/2024, 22:23

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General

Target

2024-06-25_7b3150834ae0eb4b44dbafc9ffaa026d_cryptolocker.exe
Size

54KB
MD5

7b3150834ae0eb4b44dbafc9ffaa026d
SHA1

d084a4cda5efde844bb2734a6a7a4a75077c0256
SHA256

606250304f55e21f0f3a4ed0d3d0807f2fca7fb84b296417787b216ff66e6742
SHA512

5f3dc382449a257715034d8dfe1b3675ed84b3e490915bf916ea854a9e0e2b1aa759b2e1a97c2906da86df9ba27a1e7e90dab2a19b41ca0906c22bd1b1ec5223
SSDEEP

768:bco/2n1TCraU6GD1P2wZEjbhxnbcuyD7U9kXDn62tH/1/LpPFP5:b7/y28wZEjbnouy8G76iH/NLpz

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 2 IoCs

resource	yara_rule
behavioral1/memory/2232-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c0000000155f7-11.dat	CryptoLocker_rule2

UPX dump on OEP (original entry point) 2 IoCs

resource	yara_rule
behavioral1/memory/2232-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral1/files/0x000c0000000155f7-11.dat	UPX

Executes dropped EXE 1 IoCs

pid	Process
2564	rewok.exe

Loads dropped DLL 1 IoCs

pid	Process
2232	2024-06-25_7b3150834ae0eb4b44dbafc9ffaa026d_cryptolocker.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2232-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/files/0x000c0000000155f7-11.dat	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
2232	2024-06-25_7b3150834ae0eb4b44dbafc9ffaa026d_cryptolocker.exe
2564	rewok.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2232 wrote to memory of 2564	2232	2024-06-25_7b3150834ae0eb4b44dbafc9ffaa026d_cryptolocker.exe	28
PID 2232 wrote to memory of 2564	2232	2024-06-25_7b3150834ae0eb4b44dbafc9ffaa026d_cryptolocker.exe	28
PID 2232 wrote to memory of 2564	2232	2024-06-25_7b3150834ae0eb4b44dbafc9ffaa026d_cryptolocker.exe	28
PID 2232 wrote to memory of 2564	2232	2024-06-25_7b3150834ae0eb4b44dbafc9ffaa026d_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-06-25_7b3150834ae0eb4b44dbafc9ffaa026d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-25_7b3150834ae0eb4b44dbafc9ffaa026d_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2232
- C:\Users\Admin\AppData\Local\Temp\rewok.exe
  "C:\Users\Admin\AppData\Local\Temp\rewok.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of UnmapMainImage
  PID:2564

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\rewok.exe

Filesize
55KB

MD5
ae687314e7e12f5651088071ebfe1780

SHA1
c8ddda4ef712ab235c7b4763b1f9e4efa2c168ba

SHA256
edb2aa00c3ed2eb30b06b686b71b8b6ab22b9000b630542e47bfe386798fbfed

SHA512
f13226b17a8d7d206900722ae50e404d19ea96fa5ef79e91a1a43ddbdf376da5b08910647287349aa38a12e42b9243f5255546a620fe393a259068c7ad7f8c72

Download Submit
memory/2232-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2232-1-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/2232-9-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/2232-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2564-24-0x00000000003A0000-0x00000000003A6000-memory.dmp

Filesize
24KB

Download