a53f25e48de9ed0a87a2866601c0beddb4fc49243009029b346cd8fadb887a7c

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
29/05/2024, 06:34

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General

Target

2024-05-29_67a75d39290782a16d92107f6e6d42e3_cryptolocker.exe
Size

40KB
MD5

67a75d39290782a16d92107f6e6d42e3
SHA1

8c2bd33a46a4b1b5364cc3859c754777319d7d22
SHA256

a53f25e48de9ed0a87a2866601c0beddb4fc49243009029b346cd8fadb887a7c
SHA512

11b16fc547af20ddf3bcb619b465d77f7f30660efca808cd2421f196264d124c98eeedc7e40dd8c8de59a94386a908e536a376eeaee5831a982d9a6e1cebad3e
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYSb:qDdFJy3QMOtEvwDpjjWMl7T1b

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1088-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00090000000233c1-13.dat	CryptoLocker_rule2
behavioral2/memory/5040-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1088-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5040-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/1088-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00090000000233c1-13.dat	CryptoLocker_set1
behavioral2/memory/5040-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1088-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/5040-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/1088-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x00090000000233c1-13.dat	UPX
behavioral2/memory/5040-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1088-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/5040-28-0x0000000000500000-0x0000000000510000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	2024-05-29_67a75d39290782a16d92107f6e6d42e3_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5040	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1088-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x00090000000233c1-13.dat	upx
behavioral2/memory/5040-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1088-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/5040-28-0x0000000000500000-0x0000000000510000-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

description	pid	Process	procid_target
PID 1088 wrote to memory of 5040	1088	2024-05-29_67a75d39290782a16d92107f6e6d42e3_cryptolocker.exe	82
PID 1088 wrote to memory of 5040	1088	2024-05-29_67a75d39290782a16d92107f6e6d42e3_cryptolocker.exe	82
PID 1088 wrote to memory of 5040	1088	2024-05-29_67a75d39290782a16d92107f6e6d42e3_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-29_67a75d39290782a16d92107f6e6d42e3_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-29_67a75d39290782a16d92107f6e6d42e3_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1088
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:5040

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
40KB

MD5
19c4b17a5e494889368b58895792f047

SHA1
fdb81d56eda010b64fe1dbf5771e90f98900dc77

SHA256
960203795608c8998846a3df75ead0bb265fb8adebb32d09b26f676ac846a6b4

SHA512
0099434fd6be7181a1ac52e921ff93e9e54d93e8333316d6527f80d86c340917a2f3f5fc7f90229a3ecb69e1fe43e3a15dfa31e9a265b05f3eaa3216a3d28055

Download Submit
memory/1088-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1088-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1088-2-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/1088-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1088-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5040-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5040-21-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/5040-27-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/5040-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download