76fa8b190bd4ddfe746536a19398c2a1602e23ce246cc5a40c9d9b759c0a318e

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
06/03/2024, 06:14

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General

Target

2024-03-06_91db5df5ae4740ea83a2f14492e88dea_cryptolocker.exe
Size

126KB
MD5

91db5df5ae4740ea83a2f14492e88dea
SHA1

ba7816ba8779e2bf6ad2e29429c8cf32e2f6ccf0
SHA256

76fa8b190bd4ddfe746536a19398c2a1602e23ce246cc5a40c9d9b759c0a318e
SHA512

f92fd06847d4d72664928b9020bd3ad7c85c3c8397f6a8fe12e8a44038c65e1001af01350791a73e398f1a79a8c8dbbff7eb31df3ccdad5d408e086274541eb9
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp699GNtL1eIEm:AnBdOOtEvwDpj6zE

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4948-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023214-13.dat	CryptoLocker_rule2
behavioral2/memory/4948-19-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3956-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4948-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023214-13.dat	CryptoLocker_set1
behavioral2/memory/4948-19-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3956-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4948-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x0007000000023214-13.dat	UPX
behavioral2/memory/4948-19-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/3956-26-0x0000000000500000-0x000000000050F000-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-1-5-21-3045580317-3728985860-206385570-1000\Control Panel\International\Geo\Nation	2024-03-06_91db5df5ae4740ea83a2f14492e88dea_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3956	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4948-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x0007000000023214-13.dat	upx
behavioral2/memory/4948-19-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/3956-26-0x0000000000500000-0x000000000050F000-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 4948 wrote to memory of 3956	4948	2024-03-06_91db5df5ae4740ea83a2f14492e88dea_cryptolocker.exe	90
PID 4948 wrote to memory of 3956	4948	2024-03-06_91db5df5ae4740ea83a2f14492e88dea_cryptolocker.exe	90
PID 4948 wrote to memory of 3956	4948	2024-03-06_91db5df5ae4740ea83a2f14492e88dea_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-03-06_91db5df5ae4740ea83a2f14492e88dea_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-06_91db5df5ae4740ea83a2f14492e88dea_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4948
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3956

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
127KB

MD5
4900b3fe801b127142ae87048efed919

SHA1
8e504d37dffec35d4efc5caec5c7de53d836e75c

SHA256
3c08906b441c8e356aab49de153591c33c2680cf8cc09957207154fe78707aef

SHA512
8d0bab2d76ba8cc23ad9f4545b5d10e4cdd6c9da9612d86b2726770cfda9a7e25aca0ebd0ec2cf789e4bada22aa3954788a796db82ffdfded774bd0de3760d34

Download Submit
memory/3956-18-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3956-20-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3956-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4948-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4948-1-0x0000000002150000-0x0000000002156000-memory.dmp

Filesize
24KB

Download
memory/4948-2-0x0000000002150000-0x0000000002156000-memory.dmp

Filesize
24KB

Download
memory/4948-3-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/4948-19-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download