09d3aa0e2a27ce31f7d2eaaa50f73b7eda21c430306679a0a7fda02c0a1ec673

Analysis

max time kernel
148s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
16/05/2024, 06:46

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General

Target

2024-05-16_4aa4cc43f8ce145fef9190501f11c7e5_cryptolocker.exe
Size

90KB
MD5

4aa4cc43f8ce145fef9190501f11c7e5
SHA1

2569cd2adf74bf0bf378e1b6e98496b3e97cb10c
SHA256

09d3aa0e2a27ce31f7d2eaaa50f73b7eda21c430306679a0a7fda02c0a1ec673
SHA512

f941ead69eef1070aad36bc58a3d7d7052f822516c961ce9202a712c5052f05aecf0b3f22c3af1becd68f4c0806fd04aba1cf99f0ac502414ebd31399e622127
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAA/N:n6a+1SEOtEvwDpjYYvQd2PG

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2200-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023305-15.dat	CryptoLocker_rule2
behavioral2/memory/2200-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2992-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2200-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023305-15.dat	CryptoLocker_set1
behavioral2/memory/2200-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2992-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2200-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023305-15.dat	UPX
behavioral2/memory/2200-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2992-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	2024-05-16_4aa4cc43f8ce145fef9190501f11c7e5_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2992	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2200-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0007000000023305-15.dat	upx
behavioral2/memory/2200-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2992-26-0x0000000000500000-0x0000000000510000-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 3 IoCs

description	pid	Process	procid_target
PID 2200 wrote to memory of 2992	2200	2024-05-16_4aa4cc43f8ce145fef9190501f11c7e5_cryptolocker.exe	83
PID 2200 wrote to memory of 2992	2200	2024-05-16_4aa4cc43f8ce145fef9190501f11c7e5_cryptolocker.exe	83
PID 2200 wrote to memory of 2992	2200	2024-05-16_4aa4cc43f8ce145fef9190501f11c7e5_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-16_4aa4cc43f8ce145fef9190501f11c7e5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-16_4aa4cc43f8ce145fef9190501f11c7e5_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2200
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2992

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
90KB

MD5
ccd0c2a21ed2ec29f8412c2fb94617ab

SHA1
4dc0ee38121627a21b379f1c9dbf4c9b78c1ee33

SHA256
cfbad6affee2e6d0fef294c289693ea7b686f4827447b23b5e080060ff713e64

SHA512
ada926ffd3610c5affa0d6721d270cc8f10678bb9af55e95092768d6b193d663fa8d1d9ebdfa31ea35174cd0141f1d459ec8cc0963424e9e0f4512779f23eac1

Download Submit
memory/2200-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2200-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/2200-9-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/2200-2-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/2200-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2992-25-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2992-19-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/2992-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download