345fc916f517d77af4e45fba8f65d73b2d284737800f25911a91050755b437d8

Analysis

max time kernel
139s
max time network
157s
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, 15:36

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General

Target

2024-02-12_7ae41a3c2bfaa3536bf63de0e61a26bb_cryptolocker.exe
Size

55KB
MD5

7ae41a3c2bfaa3536bf63de0e61a26bb
SHA1

af437ba62504823ad97d5317f16f940d50d56668
SHA256

345fc916f517d77af4e45fba8f65d73b2d284737800f25911a91050755b437d8
SHA512

113e0a46482e91ef4e851f508214a04cbcd34b37a67ed0e6ed1d151bbd448e659ee5e77dfec69ac6993b9e75822f7959599942cfb4c5c6a42daf22b73b7b1fd3
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YMLam5ax86:z6QFElP6n+gKmddpMOtEvwDpj9aYa7

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4040-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023118-13.dat	CryptoLocker_rule2
behavioral2/memory/4040-21-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3656-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4040-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023118-13.dat	CryptoLocker_set1
behavioral2/memory/4040-21-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3656-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4040-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023118-13.dat	UPX
behavioral2/memory/4040-21-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3656-26-0x0000000000500000-0x0000000000510000-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	2024-02-12_7ae41a3c2bfaa3536bf63de0e61a26bb_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3656	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4040-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0007000000023118-13.dat	upx
behavioral2/memory/4040-21-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3656-26-0x0000000000500000-0x0000000000510000-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 4040 wrote to memory of 3656	4040	2024-02-12_7ae41a3c2bfaa3536bf63de0e61a26bb_cryptolocker.exe	84
PID 4040 wrote to memory of 3656	4040	2024-02-12_7ae41a3c2bfaa3536bf63de0e61a26bb_cryptolocker.exe	84
PID 4040 wrote to memory of 3656	4040	2024-02-12_7ae41a3c2bfaa3536bf63de0e61a26bb_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-12_7ae41a3c2bfaa3536bf63de0e61a26bb_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_7ae41a3c2bfaa3536bf63de0e61a26bb_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4040
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3656

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
55KB

MD5
531f0b04886420f72d553b147d6744e9

SHA1
f6a60dab9d6a0224f0b1ab427e9b57225a0d9287

SHA256
b7f9f4307f3489dab18970c2359cbd4a47b9a9c3b48a35ae43243695e5f03cdf

SHA512
b38bddafce6ba2ff3176b12e42fdb95412bc63652a9993157575039f58954add7174c32c75a87683d3e2de86bea058a3e1e5c55c316835a02eae1c522d432d5e

Download Submit
memory/3656-19-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/3656-18-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/3656-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4040-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4040-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4040-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4040-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/4040-21-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download