c83729f157c88f74c52c2cb93a4d665be1300f565b0f6d1f9459997d599e706c

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
28/01/2024, 12:38

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General

Target

2024-01-28_76324d9a531f0692e61d805efb265085_cryptolocker.exe
Size

80KB
MD5

76324d9a531f0692e61d805efb265085
SHA1

2143f1017b99d63a2ed332e2e648707a06466905
SHA256

c83729f157c88f74c52c2cb93a4d665be1300f565b0f6d1f9459997d599e706c
SHA512

251be0d0b6d6cce2d7195aeeaac61ee68ae2e09589a130f09e840d4a9b883ad737177a1d8b8dded6245d1a2fe25b181fd7fdae0a0fa26c2a288d1e09b140e0ec
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdWa:T6a+rdOOtEvwDpjNt9

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3748-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000f000000023151-13.dat	CryptoLocker_rule2
behavioral2/memory/3748-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2052-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3748-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000f000000023151-13.dat	CryptoLocker_set1
behavioral2/memory/3748-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2052-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3748-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000f000000023151-13.dat	UPX
behavioral2/memory/3748-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2052-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3791175113-1062217823-1177695025-1000\Control Panel\International\Geo\Nation	2024-01-28_76324d9a531f0692e61d805efb265085_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2052	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3748-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000f000000023151-13.dat	upx
behavioral2/memory/3748-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2052-26-0x0000000000500000-0x0000000000510000-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 3748 wrote to memory of 2052	3748	2024-01-28_76324d9a531f0692e61d805efb265085_cryptolocker.exe	20
PID 3748 wrote to memory of 2052	3748	2024-01-28_76324d9a531f0692e61d805efb265085_cryptolocker.exe	20
PID 3748 wrote to memory of 2052	3748	2024-01-28_76324d9a531f0692e61d805efb265085_cryptolocker.exe	20

C:\Users\Admin\AppData\Local\Temp\2024-01-28_76324d9a531f0692e61d805efb265085_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-28_76324d9a531f0692e61d805efb265085_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3748
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2052

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
80KB

MD5
510a08cd34ed958d1a810c5fb0b2094e

SHA1
19b44e4ddaddee07adcd8da0b83ecbad7b5498c0

SHA256
25959f242a4ae72572e7d9d6618389df3f742875ec088c8d5da42633d8a4fa68

SHA512
4fb53b0be3d30a076b82dc811ee23e090235601a0a984ea81a874eb2e5bfa409e3a0bf408c308cbf6080c645619009c1187d42b1144ed2d26f664bad64c281ac

Download Submit
memory/2052-19-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/2052-25-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/2052-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3748-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3748-3-0x00000000021B0000-0x00000000021B6000-memory.dmp

Filesize
24KB

Download
memory/3748-2-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/3748-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/3748-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download