d5e75aab4964e05d7db60d3b774f9853b16c3cd5101aec18cc6c4a4f33ffb073

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
14/02/2024, 09:38

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General

Target

2024-02-14_8a48294e331a30f5a2eb66f9c7f210fc_cryptolocker.exe
Size

126KB
MD5

8a48294e331a30f5a2eb66f9c7f210fc
SHA1

c4f91a2c2204001151a5b4729693824694facccd
SHA256

d5e75aab4964e05d7db60d3b774f9853b16c3cd5101aec18cc6c4a4f33ffb073
SHA512

6e15a7334d450678c48e38ed613c8492638d2bce5a7230dd343c1963964603e54899863ee8e6b89f6331e3910a3107f57c1534f67b5c46dfb4253e3c07d615d5
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp699GNtL1emw:AnBdOOtEvwDpj6zh

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4088-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023177-13.dat	CryptoLocker_rule2
behavioral2/memory/4088-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4060-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4088-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c000000023177-13.dat	CryptoLocker_set1
behavioral2/memory/4088-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4060-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4088-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000c000000023177-13.dat	UPX
behavioral2/memory/4088-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4060-26-0x0000000000500000-0x000000000050F000-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-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	2024-02-14_8a48294e331a30f5a2eb66f9c7f210fc_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4060	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4088-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000c000000023177-13.dat	upx
behavioral2/memory/4088-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4060-26-0x0000000000500000-0x000000000050F000-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 4088 wrote to memory of 4060	4088	2024-02-14_8a48294e331a30f5a2eb66f9c7f210fc_cryptolocker.exe	84
PID 4088 wrote to memory of 4060	4088	2024-02-14_8a48294e331a30f5a2eb66f9c7f210fc_cryptolocker.exe	84
PID 4088 wrote to memory of 4060	4088	2024-02-14_8a48294e331a30f5a2eb66f9c7f210fc_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-14_8a48294e331a30f5a2eb66f9c7f210fc_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-14_8a48294e331a30f5a2eb66f9c7f210fc_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4088
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4060

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
5cce0ff9c681d0e231c2de2b7c414ba4

SHA1
4b57300c08d2e0b4cbd50fadc6253025b8a670c3

SHA256
24ccde65aa975965549bf4ef04c581435bda6bad65c197f2dd4a1313e42f71e8

SHA512
0c6617a788cd7d9261ff19868ed63e588567f5427cf9f78ebd5c344a15f8220f948cc11cf4ca24f89f33478cb76ecae9fda66acd2e41d3ced0a21b6b66d9db33

Download Submit
memory/4060-21-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/4060-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4088-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4088-1-0x0000000000530000-0x0000000000536000-memory.dmp

Filesize
24KB

Download
memory/4088-2-0x0000000000530000-0x0000000000536000-memory.dmp

Filesize
24KB

Download
memory/4088-3-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/4088-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download