3e8b022790b469765105bdd7781276b4386d994b4168a00fa8b1fccd8b071ef3

Analysis

max time kernel
148s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
24/05/2024, 12:41

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General

Target

2024-05-24_7fb5c8eb69b2e6933fbbec5d1dd8d6bf_cryptolocker.exe
Size

90KB
MD5

7fb5c8eb69b2e6933fbbec5d1dd8d6bf
SHA1

6ce12cdc3918367904321a0db965cc276f881cce
SHA256

3e8b022790b469765105bdd7781276b4386d994b4168a00fa8b1fccd8b071ef3
SHA512

55a8814af221c158d786b72e513133e47275943e899570beac0e7b627b3ece0294c0a839edf83be356409df8374d820355931503d8e99f2c0ef8ae5a6b0e98f0
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAA/B:n6a+1SEOtEvwDpjYYvQd2Pa

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2148-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0009000000023434-13.dat	CryptoLocker_rule2
behavioral2/memory/2148-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2716-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2148-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0009000000023434-13.dat	CryptoLocker_set1
behavioral2/memory/2148-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2716-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2148-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0009000000023434-13.dat	UPX
behavioral2/memory/2148-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2716-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation	2024-05-24_7fb5c8eb69b2e6933fbbec5d1dd8d6bf_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2716	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2148-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0009000000023434-13.dat	upx
behavioral2/memory/2148-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2716-26-0x0000000000500000-0x0000000000510000-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 2148 wrote to memory of 2716	2148	2024-05-24_7fb5c8eb69b2e6933fbbec5d1dd8d6bf_cryptolocker.exe	83
PID 2148 wrote to memory of 2716	2148	2024-05-24_7fb5c8eb69b2e6933fbbec5d1dd8d6bf_cryptolocker.exe	83
PID 2148 wrote to memory of 2716	2148	2024-05-24_7fb5c8eb69b2e6933fbbec5d1dd8d6bf_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-24_7fb5c8eb69b2e6933fbbec5d1dd8d6bf_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-24_7fb5c8eb69b2e6933fbbec5d1dd8d6bf_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2148
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2716

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
91KB

MD5
a33c6aabfda86bdbebafb164bb3267be

SHA1
6bf98608e0fc20f7b2b895174a92c6d279422e78

SHA256
a60a9026efede0a66b0b4fe859c475d7320991003f875727e2c27c5356cbd0d3

SHA512
e70eb55bfd55b00116f68e9a07442c4b8c72d84a7f69e62f709619e39d649435baa37487ee9591ad910fe82b7debc8b4487aaf34c073e2118f452e66c4fb6a2e

Download Submit
memory/2148-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2148-1-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/2148-3-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/2148-2-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/2148-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2716-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2716-25-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2716-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download