b4de9dd14678a1f31ff65fae40b0500dd350b5048e52f40b496e24da0c322108

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
15/03/2024, 19:34

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General

Target

2024-03-15_46ae2721772af6cec23a00ab80ad77da_cryptolocker.exe
Size

70KB
MD5

46ae2721772af6cec23a00ab80ad77da
SHA1

ed0c02c6fe59d6edd0ff4979aa0b7bd0a7fc57f4
SHA256

b4de9dd14678a1f31ff65fae40b0500dd350b5048e52f40b496e24da0c322108
SHA512

e9c6416cf0cb729d567cd901399f2c9a18f856e0bdd91c2b3af7ba7a5ee88bbd638a2aff8669f6102e2160b336fb8a2b57c6a445ab5b64c1b63a46583cca1b4a
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj9aYaFAeB+3h:z6a+CdOOtEvwDpjQi

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4796-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023157-13.dat	CryptoLocker_rule2
behavioral2/memory/4796-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1424-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4796-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c000000023157-13.dat	CryptoLocker_set1
behavioral2/memory/4796-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1424-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4796-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000c000000023157-13.dat	UPX
behavioral2/memory/4796-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1424-26-0x0000000000500000-0x0000000000510000-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	2024-03-15_46ae2721772af6cec23a00ab80ad77da_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1424	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4796-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000c000000023157-13.dat	upx
behavioral2/memory/4796-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1424-26-0x0000000000500000-0x0000000000510000-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 4796 wrote to memory of 1424	4796	2024-03-15_46ae2721772af6cec23a00ab80ad77da_cryptolocker.exe	85
PID 4796 wrote to memory of 1424	4796	2024-03-15_46ae2721772af6cec23a00ab80ad77da_cryptolocker.exe	85
PID 4796 wrote to memory of 1424	4796	2024-03-15_46ae2721772af6cec23a00ab80ad77da_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-03-15_46ae2721772af6cec23a00ab80ad77da_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-15_46ae2721772af6cec23a00ab80ad77da_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4796
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1424

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
70KB

MD5
8c87820f660789e17ba0ff8a236cee86

SHA1
e2a4e979170452e16c61fb25f93806f5bb6a299f

SHA256
2a32189d6a28c391cc0ea1ec47385971369a82f2069bcd6d43bab2e90376d3a3

SHA512
87a0e50ff6e67a4e48af99c6f59e65e9a6932967cd25a9e33145ca41021128346d67c420a2ce745ca8a450290ddebac9e9da9b3916bfac90931b26377df1641a

Download Submit
memory/1424-19-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/1424-22-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1424-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4796-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4796-1-0x00000000005F0000-0x00000000005F6000-memory.dmp

Filesize
24KB

Download
memory/4796-2-0x00000000005F0000-0x00000000005F6000-memory.dmp

Filesize
24KB

Download
memory/4796-3-0x0000000000610000-0x0000000000616000-memory.dmp

Filesize
24KB

Download
memory/4796-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download