c2bba54f2efb21c8f7c09c5fae40503f0ffef036edd3c1fa4dc079cb62244dd6

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
22-05-2024 21:45

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General

Target

2024-05-22_75bbc3860fad5a5baea6b5081055013c_cryptolocker.exe
Size

39KB
MD5

75bbc3860fad5a5baea6b5081055013c
SHA1

7f8633e7f87219b0c1324c0c57deabc8deb96749
SHA256

c2bba54f2efb21c8f7c09c5fae40503f0ffef036edd3c1fa4dc079cb62244dd6
SHA512

aa402c230c2a4d808b7497374979b51c1c4acc5a13aa3bdc2936d6d489a2b493c60372bcc70a0a8bd803e02fc0945aad48c8a1d4d121d6be8dc3154cbcf2e859
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaYpy:qDdFJy3QMOtEvwDpjjWMl7TdYpy

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1648-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/1500-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1648-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1500-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1648-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/1500-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1648-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1500-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1648-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/1500-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1648-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1500-28-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-22_75bbc3860fad5a5baea6b5081055013c_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation	2024-05-22_75bbc3860fad5a5baea6b5081055013c_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

1500 asih.exe

pid	process
1500	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/1648-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/1500-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1648-19-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1500-28-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-22_75bbc3860fad5a5baea6b5081055013c_cryptolocker.exe

description	pid	process	target process
PID 1648 wrote to memory of 1500	1648	2024-05-22_75bbc3860fad5a5baea6b5081055013c_cryptolocker.exe	asih.exe
PID 1648 wrote to memory of 1500	1648	2024-05-22_75bbc3860fad5a5baea6b5081055013c_cryptolocker.exe	asih.exe
PID 1648 wrote to memory of 1500	1648	2024-05-22_75bbc3860fad5a5baea6b5081055013c_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_75bbc3860fad5a5baea6b5081055013c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_75bbc3860fad5a5baea6b5081055013c_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1648

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:1500

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
39KB

MD5
766ef30a64aacd0c3d00da269fc54e06

SHA1
5b6e169c6e2477d99e3353c3c1b8db4df2ff6e73

SHA256
61d5af80e20aaff1added06f0a65fb6902cbb9961be895a3bff68ae560610794

SHA512
59455602ed87730144ddfa1955ea390eb2e9771bafc7bcac31ed1c43c9d9fbb76e7dc0e9087d08774fe44307c57630159f73d543abb2180d87b26bc03d9a445f

Download Submit
memory/1500-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1500-27-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1500-21-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1500-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1648-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1648-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/1648-2-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/1648-9-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/1648-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download