5b8a74d58a12ca9c45e1b15806f72f63a64216b8a0e6162ebfbc29630a47bf55

Analysis

max time kernel
138s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
12-02-2024 19:23

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General

Target

2024-02-12_48422d1de467d2df58a9424f2bc1fc3b_cryptolocker.exe
Size

61KB
MD5

48422d1de467d2df58a9424f2bc1fc3b
SHA1

941925b2e47630a48eadea9b43844492b46609c9
SHA256

5b8a74d58a12ca9c45e1b15806f72f63a64216b8a0e6162ebfbc29630a47bf55
SHA512

deb06b0cf3406f5e151a1a7adb42b0085762f37cbd8beee099972d61d4340e7c1a2b9e53130c0c18b9c9181406ab7a19242e4597199db2ec30cf0c30bcfd3fcd
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjY7D3:1nK6a+qdOOtEvwDpjY

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2244-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/3484-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2244-19-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3484-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2244-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/3484-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/2244-19-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/3484-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2244-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/3484-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/2244-19-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/3484-27-0x0000000000500000-0x000000000050F311-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

Processes:

2024-02-12_48422d1de467d2df58a9424f2bc1fc3b_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	2024-02-12_48422d1de467d2df58a9424f2bc1fc3b_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3484 asih.exe

pid	process
3484	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/2244-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/3484-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/2244-19-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/3484-27-0x0000000000500000-0x000000000050F311-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

Processes:

2024-02-12_48422d1de467d2df58a9424f2bc1fc3b_cryptolocker.exe

description	pid	process	target process
PID 2244 wrote to memory of 3484	2244	2024-02-12_48422d1de467d2df58a9424f2bc1fc3b_cryptolocker.exe	asih.exe
PID 2244 wrote to memory of 3484	2244	2024-02-12_48422d1de467d2df58a9424f2bc1fc3b_cryptolocker.exe	asih.exe
PID 2244 wrote to memory of 3484	2244	2024-02-12_48422d1de467d2df58a9424f2bc1fc3b_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_48422d1de467d2df58a9424f2bc1fc3b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_48422d1de467d2df58a9424f2bc1fc3b_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2244

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:3484

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
61KB

MD5
142fdfc2cce89468d707e5ee9e730993

SHA1
8da50d8fb66ec39a3a5b695e53e9ff8ddcd83ad2

SHA256
7cd97235761eb5dd4cd66d3b1992c35fb8679548bf9e7dd070123688883c3dab

SHA512
de51dfbe078b212571bd2959914372d97256b7c544168c3d974db1756c593b4e76b0de4009755b075ce121cdc5e5336247aaf910bdbce5b041ecd16032916ff8

Download Submit
memory/2244-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2244-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2244-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2244-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/2244-19-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3484-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3484-22-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3484-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3484-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download