9044d53261b2d1abd988995cc54a984c387ddce69262bd11a44d863c78d1ba2f

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
25/02/2024, 01:36

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General

Target

2024-02-25_befca5c9fb62c178175995b630c18abe_cryptolocker.exe
Size

92KB
MD5

befca5c9fb62c178175995b630c18abe
SHA1

74fb418c136082ed36fa32399c86d4eb25825dc8
SHA256

9044d53261b2d1abd988995cc54a984c387ddce69262bd11a44d863c78d1ba2f
SHA512

fcb2e5dea26acc217dfb518ceec7b31646e07349199fdef81c963ac4a626ccd84af9f05d122798d035acda0326cb6ac84714e71b6e31284be0a02b2eb150edc0
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgpwbrC:AnBdOOtEvwDpj6zG

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2756-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00c300000001e848-12.dat	CryptoLocker_rule2
behavioral2/memory/2756-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4692-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2756-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00c300000001e848-12.dat	CryptoLocker_set1
behavioral2/memory/2756-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4692-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2756-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x00c300000001e848-12.dat	UPX
behavioral2/memory/2756-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4692-26-0x0000000000500000-0x000000000050F000-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-1-5-21-2132103209-3755304320-2959162027-1000\Control Panel\International\Geo\Nation	2024-02-25_befca5c9fb62c178175995b630c18abe_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4692	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2756-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x00c300000001e848-12.dat	upx
behavioral2/memory/2756-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4692-26-0x0000000000500000-0x000000000050F000-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 2756 wrote to memory of 4692	2756	2024-02-25_befca5c9fb62c178175995b630c18abe_cryptolocker.exe	92
PID 2756 wrote to memory of 4692	2756	2024-02-25_befca5c9fb62c178175995b630c18abe_cryptolocker.exe	92
PID 2756 wrote to memory of 4692	2756	2024-02-25_befca5c9fb62c178175995b630c18abe_cryptolocker.exe	92

C:\Users\Admin\AppData\Local\Temp\2024-02-25_befca5c9fb62c178175995b630c18abe_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-25_befca5c9fb62c178175995b630c18abe_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2756
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4692

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
92KB

MD5
1c47535e98a439f93e827d6c1bb33332

SHA1
4ddf39fc16c024b0a72ee54a1181ec112e38f35a

SHA256
3855f2155c1e243c16e60ce1e8f666743b437737d17390f13e1d49ca2907a5a7

SHA512
133a7752177bdb31fa18b19e324aaf6a05253b79587479e05c05bd046789e9d80b9235483b237f397f96dddc571f14a2687e57b55e14bc9eccbb65abf4de96df

Download Submit
memory/2756-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2756-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2756-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2756-3-0x0000000000710000-0x0000000000716000-memory.dmp

Filesize
24KB

Download
memory/2756-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4692-19-0x0000000000650000-0x0000000000656000-memory.dmp

Filesize
24KB

Download
memory/4692-24-0x0000000000630000-0x0000000000636000-memory.dmp

Filesize
24KB

Download
memory/4692-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download