c2f740eb8af9c4796cf83a8a42446d5d2064f53edea77fde8ed20793f69e0ba7

Analysis

max time kernel
150s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
28/06/2024, 17:23

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General

Target

2024-06-28_111a080693ea448a8709649e0c254205_cryptolocker.exe
Size

55KB
MD5

111a080693ea448a8709649e0c254205
SHA1

01c546594c7726bae4920d647291ceda5a620202
SHA256

c2f740eb8af9c4796cf83a8a42446d5d2064f53edea77fde8ed20793f69e0ba7
SHA512

575dc0783a073e5275a897814c11a01e776445760555d9691e315b0cd8383723e784e4dc3553d40fe2f775d2b8bedca15a98446efe487780920906f16ea77a3d
SSDEEP

768:bco/2n1TCraU6GD1P2wZEjbhxnbcuyD7U9kXDn62tH/1/LpPFPP:b7/y28wZEjbnouy8G76iH/NLpl

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/1704-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000022f51-13.dat	CryptoLocker_rule2
behavioral2/memory/4816-19-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral2/memory/1704-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral2/files/0x0008000000022f51-13.dat	UPX
behavioral2/memory/4816-19-0x0000000000400000-0x000000000040E000-memory.dmp	UPX

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-06-28_111a080693ea448a8709649e0c254205_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4816	rewok.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1704-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral2/files/0x0008000000022f51-13.dat	upx
behavioral2/memory/4816-19-0x0000000000400000-0x000000000040E000-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 3 IoCs

description	pid	Process	procid_target
PID 1704 wrote to memory of 4816	1704	2024-06-28_111a080693ea448a8709649e0c254205_cryptolocker.exe	81
PID 1704 wrote to memory of 4816	1704	2024-06-28_111a080693ea448a8709649e0c254205_cryptolocker.exe	81
PID 1704 wrote to memory of 4816	1704	2024-06-28_111a080693ea448a8709649e0c254205_cryptolocker.exe	81

C:\Users\Admin\AppData\Local\Temp\2024-06-28_111a080693ea448a8709649e0c254205_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-28_111a080693ea448a8709649e0c254205_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1704
- C:\Users\Admin\AppData\Local\Temp\rewok.exe
  "C:\Users\Admin\AppData\Local\Temp\rewok.exe"
  2⤵
  - Executes dropped EXE
  PID:4816

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\rewok.exe

Filesize
55KB

MD5
d17a05f795a9d9f4fc4d4a76b0cded3f

SHA1
3e6d53e1342bc1a8f85eaeca684b22cbc7536161

SHA256
3ab4c1031ec2e19ed62f593437f3a609fbcc555bc9d2ccefab0e17bd5202a1c1

SHA512
6e4e1825d663c74ae2aa797ce33375e950caa19973c9b1330d0e26fd898e85226f964eb5c15301eba2795d7290aba41b197f44bcbe93aafc68ed7cfeac63a429

Download Submit
memory/1704-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/1704-1-0x0000000000600000-0x0000000000606000-memory.dmp

Filesize
24KB

Download
memory/1704-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1704-9-0x0000000000600000-0x0000000000606000-memory.dmp

Filesize
24KB

Download
memory/4816-19-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/4816-27-0x0000000002110000-0x0000000002116000-memory.dmp

Filesize
24KB

Download