4ed7f3bfaf0e12776401fb299665329404587f3f9356933079d27161acbf09aa

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
24/04/2024, 18:51

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General

Target

2024-04-24_42ae93178630fcf7526db060ac47938c_cryptolocker.exe
Size

64KB
MD5

42ae93178630fcf7526db060ac47938c
SHA1

71837e514f28c636d6a3d77dae4349226b987cdb
SHA256

4ed7f3bfaf0e12776401fb299665329404587f3f9356933079d27161acbf09aa
SHA512

56816cfb0e65ba28f95ebd4b0e8d35ab0e793fc5ead5cd5ab5a4e4b4fca659bced3d3bf6bb1fc5089d2387354b9d79305246aeaa5b31b52dbfcb1db846c47e84
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYZ8xa:1nK6a+qdOOtEvwDpjg

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1292-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0006000000022f29-13.dat	CryptoLocker_rule2
behavioral2/memory/1292-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2772-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1292-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0006000000022f29-13.dat	CryptoLocker_set1
behavioral2/memory/1292-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/2772-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1292-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x0006000000022f29-13.dat	UPX
behavioral2/memory/1292-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/2772-26-0x0000000000500000-0x000000000050F311-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2288054676-1871194608-3559553667-1000\Control Panel\International\Geo\Nation	2024-04-24_42ae93178630fcf7526db060ac47938c_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2772	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1292-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x0006000000022f29-13.dat	upx
behavioral2/memory/1292-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/2772-26-0x0000000000500000-0x000000000050F311-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

description	pid	Process	procid_target
PID 1292 wrote to memory of 2772	1292	2024-04-24_42ae93178630fcf7526db060ac47938c_cryptolocker.exe	86
PID 1292 wrote to memory of 2772	1292	2024-04-24_42ae93178630fcf7526db060ac47938c_cryptolocker.exe	86
PID 1292 wrote to memory of 2772	1292	2024-04-24_42ae93178630fcf7526db060ac47938c_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-04-24_42ae93178630fcf7526db060ac47938c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-24_42ae93178630fcf7526db060ac47938c_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1292
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2772

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
65KB

MD5
b987806c68f30fec999512b480f85855

SHA1
1e0237dc4fd9818a8e74d51590bb69f44f9ab94c

SHA256
40e02dac73c2bec4d8f9821d7ee218143c89e4c59467edcb4718bef243bb6241

SHA512
d3c7656813d4852b310b198455f2a0f93d0df4473339cad673b787ebfbc7f812cf7bd7e2bfb250fcaa75cb603a1d944b423ae13ae77fff676d4234cecdec1077

Download Submit
memory/1292-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1292-1-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/1292-2-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/1292-3-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/1292-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2772-19-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/2772-24-0x0000000001FD0000-0x0000000001FD6000-memory.dmp

Filesize
24KB

Download
memory/2772-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download