843aeaafe308100a7d020e930d85a8e633802e4b9895129cca7b8a91c9137a02

Analysis

max time kernel
149s
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
07/06/2024, 08:25

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General

Target

2024-06-07_f74ad9d555d8e8b601b316058bb1e74f_cryptolocker.exe
Size

60KB
MD5

f74ad9d555d8e8b601b316058bb1e74f
SHA1

5e21985b1c6f96376742543ee18ba85ae16f165d
SHA256

843aeaafe308100a7d020e930d85a8e633802e4b9895129cca7b8a91c9137a02
SHA512

e533f381b7cd8a988012eaa65b2393f785bb892d37bb035a652a602cd23a6f69fdd3791e0e71e18744198fa82bebe6778da63d00165789a3a0db93c55bcce399
SSDEEP

1536:H6QFElP6n+gou9cvMOtEvwDpjCpVXhhrt:H6a+uSEOtEvwDpj+

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1540-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000600000002326f-13.dat	CryptoLocker_rule2
behavioral2/memory/1464-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1540-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1464-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/1540-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000600000002326f-13.dat	CryptoLocker_set1
behavioral2/memory/1464-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1540-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1464-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/1540-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000600000002326f-13.dat	UPX
behavioral2/memory/1464-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1540-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1464-27-0x0000000000500000-0x0000000000510000-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	2024-06-07_f74ad9d555d8e8b601b316058bb1e74f_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1464	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1540-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000600000002326f-13.dat	upx
behavioral2/memory/1464-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1540-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1464-27-0x0000000000500000-0x0000000000510000-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 1540 wrote to memory of 1464	1540	2024-06-07_f74ad9d555d8e8b601b316058bb1e74f_cryptolocker.exe	81
PID 1540 wrote to memory of 1464	1540	2024-06-07_f74ad9d555d8e8b601b316058bb1e74f_cryptolocker.exe	81
PID 1540 wrote to memory of 1464	1540	2024-06-07_f74ad9d555d8e8b601b316058bb1e74f_cryptolocker.exe	81

C:\Users\Admin\AppData\Local\Temp\2024-06-07_f74ad9d555d8e8b601b316058bb1e74f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-07_f74ad9d555d8e8b601b316058bb1e74f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1540
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1464

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
60KB

MD5
2d75a7e5e2a62630bd216de6b6420f69

SHA1
4900f958c96b13645b02e20517fcd21b26ad7dae

SHA256
204c569f1dc7ad4a8ce8556d5176bf74205814b5cf10695aae50bec424cdc8c2

SHA512
66e960aacf75ff6ad65c0ab6c1d60bef3d91615d49825078b0800562a91f21566d7aa85497181e58104579994657d43fa08300129834bbdedd5877d0f75d01c6

Download Submit
memory/1464-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1464-20-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/1464-26-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1464-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1540-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1540-1-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/1540-2-0x0000000000680000-0x0000000000686000-memory.dmp

Filesize
24KB

Download
memory/1540-9-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/1540-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download