0b9512f018a6b96b87200edd76bc83f83c3c9745e5d70729133df3430b1ef794

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
04/06/2024, 20:38

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General

Target

2024-06-04_e2449e8102c8957b8b713286402c3d31_cryptolocker.exe
Size

40KB
MD5

e2449e8102c8957b8b713286402c3d31
SHA1

ab588c11d427e1d99d247e09430d8d14436f86a7
SHA256

0b9512f018a6b96b87200edd76bc83f83c3c9745e5d70729133df3430b1ef794
SHA512

d2b63ff91f6cde486a16a24e3fac3d5e1ceea130902974e4a2c9c60f63d63250509dfe6a74c69424e0b21b97ac529943980a36ddaf335bd6040b1b6428c99a54
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYx:qDdFJy3QMOtEvwDpjjWMl7T8

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4268-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0009000000023414-13.dat	CryptoLocker_rule2
behavioral2/memory/4268-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3608-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4268-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0009000000023414-13.dat	CryptoLocker_set1
behavioral2/memory/4268-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3608-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4268-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0009000000023414-13.dat	UPX
behavioral2/memory/4268-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3608-26-0x0000000000500000-0x0000000000510000-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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-06-04_e2449e8102c8957b8b713286402c3d31_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3608	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4268-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0009000000023414-13.dat	upx
behavioral2/memory/4268-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3608-26-0x0000000000500000-0x0000000000510000-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 4268 wrote to memory of 3608	4268	2024-06-04_e2449e8102c8957b8b713286402c3d31_cryptolocker.exe	82
PID 4268 wrote to memory of 3608	4268	2024-06-04_e2449e8102c8957b8b713286402c3d31_cryptolocker.exe	82
PID 4268 wrote to memory of 3608	4268	2024-06-04_e2449e8102c8957b8b713286402c3d31_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-06-04_e2449e8102c8957b8b713286402c3d31_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-04_e2449e8102c8957b8b713286402c3d31_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4268
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3608

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
5acee58e4cb88e3e18be77aeb8eb145b

SHA1
f8ab4e4c1966d4063af0defa162735c866db00ab

SHA256
3f30b332b08974fe6479ac31543094d6d6a1be18a79973db1016d3082cd1d906

SHA512
10819729f49dfb89f50ca4a3d219002ba11b36f7087f7b02b1a3a8e71637ef8e2704aa01de7abb2c955d8519b3048bd0cfe31b06f4725b1810b24c804b0e3e12

Download Submit
memory/3608-19-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/3608-25-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/3608-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4268-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4268-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4268-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4268-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4268-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download