60ac3ba5b4cb94ecfc94e682bc30dfaf8b58671b0e43ff147bdd7f56afa04608

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
28/04/2024, 05:49

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General

Target

2024-04-28_f3293df4d1a7668bc663213adfc6d26a_cryptolocker.exe
Size

65KB
MD5

f3293df4d1a7668bc663213adfc6d26a
SHA1

9644e6059e12ee5faab28a1df16cd7cda24ec8ad
SHA256

60ac3ba5b4cb94ecfc94e682bc30dfaf8b58671b0e43ff147bdd7f56afa04608
SHA512

d1d6a529973378bed4f47942595000faeeb98b25a2fba4d86e8f8ed581304723d56d649e0c1b04bfa3a6143742276280b37acd5756140170b80542c2b466dfdd
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYZ8xDyU:1nK6a+qdOOtEvwDpj3

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/976-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023b48-13.dat	CryptoLocker_rule2
behavioral2/memory/4244-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/976-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4244-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/976-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c000000023b48-13.dat	CryptoLocker_set1
behavioral2/memory/4244-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/976-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/4244-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/976-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x000c000000023b48-13.dat	UPX
behavioral2/memory/4244-16-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/976-18-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/4244-27-0x0000000000500000-0x000000000050F311-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2860750803-256193626-1801997576-1000\Control Panel\International\Geo\Nation	2024-04-28_f3293df4d1a7668bc663213adfc6d26a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4244	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/976-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x000c000000023b48-13.dat	upx
behavioral2/memory/4244-16-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/976-18-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/4244-27-0x0000000000500000-0x000000000050F311-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

description	pid	Process	procid_target
PID 976 wrote to memory of 4244	976	2024-04-28_f3293df4d1a7668bc663213adfc6d26a_cryptolocker.exe	85
PID 976 wrote to memory of 4244	976	2024-04-28_f3293df4d1a7668bc663213adfc6d26a_cryptolocker.exe	85
PID 976 wrote to memory of 4244	976	2024-04-28_f3293df4d1a7668bc663213adfc6d26a_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-04-28_f3293df4d1a7668bc663213adfc6d26a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_f3293df4d1a7668bc663213adfc6d26a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:976
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4244

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
66KB

MD5
bb6b0d6b39512145f633c8484855ef2e

SHA1
09b572c0b24defb8a4c462a440a241ba44a7924a

SHA256
adb00da8f10cc5549324d938db78d9d2b1ab17eeb8a3c53b6b92a72fb7cb8780

SHA512
0b58dbe0053bd2db51c1cb87ea37e0f4f910e45665e8c72657b0c3c4dccecb95226ffb4b9679b8a800d15d4fa9be70da73e2e6115477535853ca687712f68ad7

Download Submit
memory/976-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/976-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/976-2-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/976-3-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/976-18-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4244-16-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4244-20-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/4244-22-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/4244-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download