de53c852c90b170328d3cdd06c4d9e331f6f489b53d818120cf6624c240badec

Analysis

max time kernel
148s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
12-02-2024 03:49

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General

Target

2024-02-12_65088b2ae5fef7cdd379aac32aa729b4_cryptolocker.exe
Size

62KB
MD5

65088b2ae5fef7cdd379aac32aa729b4
SHA1

f72161b72d5826aa56f6e15bc501dadeb60f76a9
SHA256

de53c852c90b170328d3cdd06c4d9e331f6f489b53d818120cf6624c240badec
SHA512

ea7bede870bd3946fbbe06f8c408ce093d343fbabbbb32230a39ac03f1d4640486acd2cce4a0c89e2d2c862a957b310063cb1f65e3d415fc93541311c7c1bb4a
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYibAoQ:1nK6a+qdOOtEvwDpja

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3180-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c00000002314e-13.dat	CryptoLocker_rule2
behavioral2/memory/3180-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4976-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3180-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c00000002314e-13.dat	CryptoLocker_set1
behavioral2/memory/3180-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/4976-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3180-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x000c00000002314e-13.dat	UPX
behavioral2/memory/3180-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/4976-26-0x0000000000500000-0x000000000050F311-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-1-5-21-3791175113-1062217823-1177695025-1000\Control Panel\International\Geo\Nation	2024-02-12_65088b2ae5fef7cdd379aac32aa729b4_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4976	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3180-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x000c00000002314e-13.dat	upx
behavioral2/memory/3180-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/4976-26-0x0000000000500000-0x000000000050F311-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 3180 wrote to memory of 4976	3180	2024-02-12_65088b2ae5fef7cdd379aac32aa729b4_cryptolocker.exe	85
PID 3180 wrote to memory of 4976	3180	2024-02-12_65088b2ae5fef7cdd379aac32aa729b4_cryptolocker.exe	85
PID 3180 wrote to memory of 4976	3180	2024-02-12_65088b2ae5fef7cdd379aac32aa729b4_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-02-12_65088b2ae5fef7cdd379aac32aa729b4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_65088b2ae5fef7cdd379aac32aa729b4_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3180
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4976

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
62KB

MD5
f0cec6c7ee0c80938c37b81d824cb590

SHA1
cf22c3a0938ae080e1297c8553f5fa8abc7606e5

SHA256
59766c7bc9756dcf3a596337f5d670f259eeb1a128edadebcc3a852e137e5f2e

SHA512
c31a11def4354a2b699e176f846a8fa007d40dcb078944dd1acd95e64953905e28fa08eb649ee19bee6a8ff65ad8b3bbee28845a0a673131d09aca1015a6684c

Download Submit
memory/3180-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3180-1-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/3180-2-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/3180-3-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/3180-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4976-19-0x0000000000760000-0x0000000000766000-memory.dmp

Filesize
24KB

Download
memory/4976-24-0x0000000000740000-0x0000000000746000-memory.dmp

Filesize
24KB

Download
memory/4976-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download