4833a4294c7ede66d9d3c4bf487bfdc31c14fc181aa805cd05519b12ff7f5fa3

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
22/05/2024, 05:28

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General

Target

2024-05-22_0dc35b22f22d5cf3ecb57e86c381850d_cryptolocker.exe
Size

40KB
MD5

0dc35b22f22d5cf3ecb57e86c381850d
SHA1

70c6e755c95cd55aabec1fa628361ed143d7af57
SHA256

4833a4294c7ede66d9d3c4bf487bfdc31c14fc181aa805cd05519b12ff7f5fa3
SHA512

472cbdc4b310004b4b380d535ec7c9ce47fe7a821e151557664110b087c5c167247723b9c904c7bd232e507a372c4e3eb57d7e31e0f31efbf9c45ca3a644627a
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYox:qDdFJy3QMOtEvwDpjjWMl7Tlx

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3968-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0006000000023298-13.dat	CryptoLocker_rule2
behavioral2/memory/3968-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4200-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4200-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/3968-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0006000000023298-13.dat	CryptoLocker_set1
behavioral2/memory/3968-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4200-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4200-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/3968-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0006000000023298-13.dat	UPX
behavioral2/memory/3968-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4200-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4200-27-0x0000000000500000-0x0000000000510000-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-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation	2024-05-22_0dc35b22f22d5cf3ecb57e86c381850d_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4200	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3968-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0006000000023298-13.dat	upx
behavioral2/memory/3968-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4200-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4200-27-0x0000000000500000-0x0000000000510000-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 3968 wrote to memory of 4200	3968	2024-05-22_0dc35b22f22d5cf3ecb57e86c381850d_cryptolocker.exe	83
PID 3968 wrote to memory of 4200	3968	2024-05-22_0dc35b22f22d5cf3ecb57e86c381850d_cryptolocker.exe	83
PID 3968 wrote to memory of 4200	3968	2024-05-22_0dc35b22f22d5cf3ecb57e86c381850d_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-22_0dc35b22f22d5cf3ecb57e86c381850d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_0dc35b22f22d5cf3ecb57e86c381850d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3968
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4200

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
e600b51d72bb1b55099aa90a55a75f99

SHA1
9c326a0941c00c27f95255210a51a6a329768003

SHA256
1ec1d72b106ea7dc05d4ea264257931f04dfd8ea3f23ffa39fb25453e56a0b52

SHA512
695829bb66cee82c7c28f5675af8b9cf5a7ca4fd7a3a40669ccf62d79e357b05cd4156fe41f3d72118cd8bd3b3e6c8153d0cd2a17fcfbf46c6bcaa36a9aa038e

Download Submit
memory/3968-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3968-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/3968-2-0x0000000000510000-0x0000000000516000-memory.dmp

Filesize
24KB

Download
memory/3968-9-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/3968-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4200-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4200-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4200-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4200-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download