a333b02e43c8d133286ace3b5325e8a91cb37277676dfbb5ba7f96c3051e8a37

Analysis

max time kernel
148s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
18/02/2024, 07:38

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General

Target

2024-02-18_89b2b6fc3bd2da7208965d98e9e45c76_cryptolocker.exe
Size

101KB
MD5

89b2b6fc3bd2da7208965d98e9e45c76
SHA1

386128858f1ad0271fd701003d8129701ac04ae6
SHA256

a333b02e43c8d133286ace3b5325e8a91cb37277676dfbb5ba7f96c3051e8a37
SHA512

9c3817531df9b620926fcbeabb3b84552da53fd0d5c58c1f3fccdbfb6b6d5748f61fc4d00f6898d8f70b65162e7fd1033be89114bf3ae41ddaedec07e6d1ba9f
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgpwqWsviy6ixB:AnBdOOtEvwDpj6zm

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/5092-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023118-13.dat	CryptoLocker_rule2
behavioral2/memory/5092-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2092-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/5092-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023118-13.dat	CryptoLocker_set1
behavioral2/memory/5092-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2092-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/5092-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x0007000000023118-13.dat	UPX
behavioral2/memory/5092-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/2092-26-0x0000000000500000-0x000000000050F000-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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	2024-02-18_89b2b6fc3bd2da7208965d98e9e45c76_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2092	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/5092-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x0007000000023118-13.dat	upx
behavioral2/memory/5092-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/2092-26-0x0000000000500000-0x000000000050F000-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 5092 wrote to memory of 2092	5092	2024-02-18_89b2b6fc3bd2da7208965d98e9e45c76_cryptolocker.exe	84
PID 5092 wrote to memory of 2092	5092	2024-02-18_89b2b6fc3bd2da7208965d98e9e45c76_cryptolocker.exe	84
PID 5092 wrote to memory of 2092	5092	2024-02-18_89b2b6fc3bd2da7208965d98e9e45c76_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-18_89b2b6fc3bd2da7208965d98e9e45c76_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-18_89b2b6fc3bd2da7208965d98e9e45c76_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5092
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2092

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
101KB

MD5
45b86a0ae61816205aebd05a3a984236

SHA1
dc38fedda5ce4e7fe3df6f83abf15a0597c97431

SHA256
44f0ad9d33b223124c5faf94d956447b9c553726d786c39dfc950cde5475ad4b

SHA512
69d74c93f242eae73439255ad2b4c456afc33d26923fde94994b0617eca4ac2ef56d9ea133138eb75f445c3e340d1f734826109dd802ebe4bb9d9c267f52d05e

Download Submit
memory/2092-20-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/2092-19-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/2092-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/5092-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/5092-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/5092-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/5092-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/5092-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download