0497b66bb1c89b638c0c19a9242df1fb22245a30aef78b0ad6355d199651d669

Analysis

max time kernel
150s
max time network
164s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
25-01-2024 04:33

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General

Target

2024-01-25_5172059e16ad6d220babb3bb2c11ad0c_cryptolocker.exe
Size

76KB
MD5

5172059e16ad6d220babb3bb2c11ad0c
SHA1

c5e9571a6015c4454304aad51f3c68b7ae6c0c13
SHA256

0497b66bb1c89b638c0c19a9242df1fb22245a30aef78b0ad6355d199651d669
SHA512

cd5d32418cc0b616414260817b5cc7138eabdb24ba788dbe125abf6e766ac22e0ce6a14485fc0de648dc2a6dbbea1fb95616e29c2c2032c0d0c6e5a7261ca0f6
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdSI:T6a+rdOOtEvwDpjNtn

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1692-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000300000002276d-13.dat	CryptoLocker_rule2
behavioral2/memory/1692-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/556-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1692-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000300000002276d-13.dat	CryptoLocker_set1
behavioral2/memory/1692-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/556-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1692-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000300000002276d-13.dat	UPX
behavioral2/memory/1692-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/556-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	2024-01-25_5172059e16ad6d220babb3bb2c11ad0c_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
556	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1692-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000300000002276d-13.dat	upx
behavioral2/memory/1692-25-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/556-26-0x0000000000500000-0x0000000000510000-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 1692 wrote to memory of 556	1692	2024-01-25_5172059e16ad6d220babb3bb2c11ad0c_cryptolocker.exe	88
PID 1692 wrote to memory of 556	1692	2024-01-25_5172059e16ad6d220babb3bb2c11ad0c_cryptolocker.exe	88
PID 1692 wrote to memory of 556	1692	2024-01-25_5172059e16ad6d220babb3bb2c11ad0c_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-01-25_5172059e16ad6d220babb3bb2c11ad0c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-25_5172059e16ad6d220babb3bb2c11ad0c_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1692
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:556

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
76KB

MD5
5028badccc628fe2935a689dacbc091c

SHA1
f4f10553b8c2b639ed3484f7b07130d8ac414bd0

SHA256
086e516b5562aa7b16a71fef7f3039fcb7102a932f95970a357734bf66603b74

SHA512
00430130d2571735ae86f53c564d84247c378b9ab0f90c7c0f94ee686881110509a969a2359ae31e460e41ea78efb4fd390ed03b3a2ed7d423ca894520eb071f

Download Submit
memory/556-18-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/556-21-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/556-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1692-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1692-1-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/1692-2-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/1692-3-0x0000000000740000-0x0000000000746000-memory.dmp

Filesize
24KB

Download
memory/1692-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download