46abb624ff63266f06d18f466fba5e0b2c1c926d10c102898bdfe1e4a9e63b30

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
04/02/2024, 08:25

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General

Target

2024-02-04_4c12ef47b0efff1721209bc163466185_cryptolocker.exe
Size

65KB
MD5

4c12ef47b0efff1721209bc163466185
SHA1

d2bdce0dbb1a95a51a2a1a2f89c445601eb0c9ab
SHA256

46abb624ff63266f06d18f466fba5e0b2c1c926d10c102898bdfe1e4a9e63b30
SHA512

e56ab2067f2b8398613bc9820245a0861314598009240d8245a3fd99ff3181253bc08bb735488498c638da3117ed2e9c6fa2c36f384df5822028def488c0eacf
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjY6UncS:1nK6a+qdOOtEvwDpje

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1568-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00070000000231f5-13.dat	CryptoLocker_rule2
behavioral2/memory/1568-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1500-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1568-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00070000000231f5-13.dat	CryptoLocker_set1
behavioral2/memory/1568-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/1500-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1568-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x00070000000231f5-13.dat	UPX
behavioral2/memory/1568-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/1500-26-0x0000000000500000-0x000000000050F311-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-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation	2024-02-04_4c12ef47b0efff1721209bc163466185_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1500	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1568-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x00070000000231f5-13.dat	upx
behavioral2/memory/1568-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/1500-26-0x0000000000500000-0x000000000050F311-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 1568 wrote to memory of 1500	1568	2024-02-04_4c12ef47b0efff1721209bc163466185_cryptolocker.exe	85
PID 1568 wrote to memory of 1500	1568	2024-02-04_4c12ef47b0efff1721209bc163466185_cryptolocker.exe	85
PID 1568 wrote to memory of 1500	1568	2024-02-04_4c12ef47b0efff1721209bc163466185_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-02-04_4c12ef47b0efff1721209bc163466185_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-04_4c12ef47b0efff1721209bc163466185_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1568
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1500

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\asih.exe

Filesize
65KB

MD5
02798b7e56ca34da7fa38a5ca55c943d

SHA1
4593fdf869bb9b31a84939d5dfad9ea38c7194d7

SHA256
6a8048734f31a16df247a9fd52d86c6993fbac84e3a37f53dc829282d7dcddde

SHA512
78fb4ad68c7cd0f2c054aea408a4d38a03bd04eede4e18e09d2b8e2eeb30d89a5fb76f3c6962c6f373df9c6cca97ebd7559347e7fde0c711188ac483eafa8e88

Download Submit
memory/1500-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1500-20-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1500-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1568-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1568-1-0x0000000002320000-0x0000000002326000-memory.dmp

Filesize
24KB

Download
memory/1568-2-0x0000000002320000-0x0000000002326000-memory.dmp

Filesize
24KB

Download
memory/1568-3-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/1568-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download