4d1c5ea8ba126e3e95d55b1f06ea617cc0afe15fab76be488d32069ae5a6d843

Analysis

max time kernel
140s
max time network
163s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 02:32

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General

Target

2024-05-23_74c200cf506b6cc8f2428a66d3fac4d6_cryptolocker.exe
Size

90KB
MD5

74c200cf506b6cc8f2428a66d3fac4d6
SHA1

ebe5d25c80870069f3a9dcb27285f9340b61baa8
SHA256

4d1c5ea8ba126e3e95d55b1f06ea617cc0afe15fab76be488d32069ae5a6d843
SHA512

5000634a5edf512eb80b997fd321e76adb2c46dd5051b05008bda9d60db69000528c2c093cc5dfb92d26098d7bde01c9a31bac0a9234e9572a8fb2e9dda5a44e
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAH5:n6a+1SEOtEvwDpjYYvQd2PZ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/656-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/656-14-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4252-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/656-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/656-14-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4252-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/656-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/656-14-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4252-26-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-23_74c200cf506b6cc8f2428a66d3fac4d6_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-05-23_74c200cf506b6cc8f2428a66d3fac4d6_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

4252 asih.exe

pid	process
4252	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/656-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/656-14-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4252-26-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-23_74c200cf506b6cc8f2428a66d3fac4d6_cryptolocker.exe

description	pid	process	target process
PID 656 wrote to memory of 4252	656	2024-05-23_74c200cf506b6cc8f2428a66d3fac4d6_cryptolocker.exe	asih.exe
PID 656 wrote to memory of 4252	656	2024-05-23_74c200cf506b6cc8f2428a66d3fac4d6_cryptolocker.exe	asih.exe
PID 656 wrote to memory of 4252	656	2024-05-23_74c200cf506b6cc8f2428a66d3fac4d6_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_74c200cf506b6cc8f2428a66d3fac4d6_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_74c200cf506b6cc8f2428a66d3fac4d6_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:656

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:4252

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3100 --field-trial-handle=2280,i,1836084024518340990,18250262151825427757,262144 --variations-seed-version /prefetch:8
1⤵
PID:1484

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
91KB

MD5
3d67842d700704bf5aa33fb3882064d2

SHA1
6ed7037fb6cb7041836d7dd33dcf101da404cec4

SHA256
ff4b604cb53bd5dae2e2646504ac360d3ae361fecc2c349417ccdb39e561ce12

SHA512
e7a75196428afea700b320e4f7b769e74e89f65cfac17f544c01cb68df779e530aafa2ae2c7c9d704b2a1955d7f0c13c1bacc2f353359c20bad3d25b58bb8ed5

Download Submit
memory/656-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/656-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/656-2-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/656-3-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/656-14-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4252-19-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/4252-20-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/4252-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download