5caab10c379f425688082aec9f5160ca1a8c33aa36d96f4a0bf549f237a49de6

Analysis

max time kernel
142s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
18-02-2024 08:36

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General

Target

2024-02-18_5bc4f837feaf19dd7bb2112e6cce0c16_cryptolocker.exe
Size

114KB
MD5

5bc4f837feaf19dd7bb2112e6cce0c16
SHA1

81ce6ab6e035231b6447cdf1a878b554019121c9
SHA256

5caab10c379f425688082aec9f5160ca1a8c33aa36d96f4a0bf549f237a49de6
SHA512

869ff1e1b0ffcb2e70cef2f36fb70bb588f2709525d1acbc96ae4fd2d6e567791df73adf5644821f74c0f3c8f932cd8f4f2438059106f8bf77d0149973148439
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwNgpwbCb:z6a+CdOOtEvwDpjcz2

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2856-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000600000002320a-13.dat	CryptoLocker_rule2
behavioral2/memory/2856-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1408-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2856-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000600000002320a-13.dat	CryptoLocker_set1
behavioral2/memory/2856-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1408-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2856-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000600000002320a-13.dat	UPX
behavioral2/memory/2856-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1408-26-0x0000000000500000-0x0000000000510000-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-1-5-21-635608581-3370340891-292606865-1000\Control Panel\International\Geo\Nation	2024-02-18_5bc4f837feaf19dd7bb2112e6cce0c16_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1408	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2856-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000600000002320a-13.dat	upx
behavioral2/memory/2856-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1408-26-0x0000000000500000-0x0000000000510000-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 2856 wrote to memory of 1408	2856	2024-02-18_5bc4f837feaf19dd7bb2112e6cce0c16_cryptolocker.exe	83
PID 2856 wrote to memory of 1408	2856	2024-02-18_5bc4f837feaf19dd7bb2112e6cce0c16_cryptolocker.exe	83
PID 2856 wrote to memory of 1408	2856	2024-02-18_5bc4f837feaf19dd7bb2112e6cce0c16_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-02-18_5bc4f837feaf19dd7bb2112e6cce0c16_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-18_5bc4f837feaf19dd7bb2112e6cce0c16_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2856
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1408

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
114KB

MD5
8e8659df88b940a0099b4af81af62801

SHA1
e76f75fb569eb2ab280cfc5b4377e930ee9ea1f0

SHA256
b23fe7661514ac01a2264fca9f1abe2ecae25ce32a5a134f1f09b07057509a40

SHA512
2f98441a17ce9a428df46596ed0cb5aab0d98ac7a000bcfea2128afb4ff5737a93a6bdc03eb0e19c32616cc2b9543fabbe0060ff5e40b1234f54ba93589296a6

Download Submit
memory/1408-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1408-21-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1408-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2856-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2856-1-0x00000000007F0000-0x00000000007F6000-memory.dmp

Filesize
24KB

Download
memory/2856-3-0x0000000000820000-0x0000000000826000-memory.dmp

Filesize
24KB

Download
memory/2856-2-0x00000000007F0000-0x00000000007F6000-memory.dmp

Filesize
24KB

Download
memory/2856-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download