8b8b2444ddba70fedc57edf0607bd23165cc73a8e850c74a5983e98c7f0d3e9f

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
27/05/2024, 19:33

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General

Target

2024-05-27_69c9782fe9648090006ec238915006aa_cryptolocker.exe
Size

69KB
MD5

69c9782fe9648090006ec238915006aa
SHA1

51cc6569512943ea4474c4b1b4f0f3f3ea9764d3
SHA256

8b8b2444ddba70fedc57edf0607bd23165cc73a8e850c74a5983e98c7f0d3e9f
SHA512

c0efca8a9ae650ac1cf14abaa36882318d11714e5c661f69dd9eb9a452a99a9ea9475f13eeb19e43496809f18ba8182f8ee33fdd880122056db8f4952e01f3a0
SSDEEP

1536:quJu9cvMOtEvwDpjWYTjipvF2bx1PQAeY:78SEOtEvwDpjWYvQd2PV

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1956-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00070000000232a6-13.dat	CryptoLocker_rule2
behavioral2/memory/1956-19-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2980-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2980-28-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/1956-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00070000000232a6-13.dat	CryptoLocker_set1
behavioral2/memory/1956-19-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2980-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2980-28-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/1956-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x00070000000232a6-13.dat	UPX
behavioral2/memory/1956-19-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/2980-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/2980-28-0x0000000000500000-0x000000000050F000-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-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation	2024-05-27_69c9782fe9648090006ec238915006aa_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2980	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1956-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x00070000000232a6-13.dat	upx
behavioral2/memory/1956-19-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/2980-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/2980-28-0x0000000000500000-0x000000000050F000-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 1956 wrote to memory of 2980	1956	2024-05-27_69c9782fe9648090006ec238915006aa_cryptolocker.exe	83
PID 1956 wrote to memory of 2980	1956	2024-05-27_69c9782fe9648090006ec238915006aa_cryptolocker.exe	83
PID 1956 wrote to memory of 2980	1956	2024-05-27_69c9782fe9648090006ec238915006aa_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-27_69c9782fe9648090006ec238915006aa_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-27_69c9782fe9648090006ec238915006aa_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1956
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2980

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
70KB

MD5
065346d792bc58a094110afd686ad858

SHA1
456e25e118122fc45d781ef8b38e01971944ddfa

SHA256
86f748759f6cb51835caaf97765722a677b28dc9f1b8e723a79be830b351a22a

SHA512
377ed758feeb8142300261665e7e3b325f62884a28f14bd02ae27c32d0818d38c3f30ad3160729b4c74e6741dc9022211a10ec30aa5fe02db9b5e0eb172936c0

Download Submit
memory/1956-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1956-1-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/1956-3-0x00000000007F0000-0x00000000007F6000-memory.dmp

Filesize
24KB

Download
memory/1956-2-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/1956-19-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2980-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2980-21-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/2980-27-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2980-28-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download