468e0d7a4b1070dd6156fb63df8ec84c85cfe31abb9b214adfdf220925186d7b

Analysis

max time kernel
151s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
04/06/2024, 05:41

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General

Target

2024-06-04_8503e62f8d7938b273a76cdf33e6468d_cryptolocker.exe
Size

54KB
MD5

8503e62f8d7938b273a76cdf33e6468d
SHA1

17c007cb0bb976301c4ebe8557991eb4a64c6a31
SHA256

468e0d7a4b1070dd6156fb63df8ec84c85cfe31abb9b214adfdf220925186d7b
SHA512

1a6adb017092808c84cda63cceec474bf532d7648022fc1c7c897a7874a92829e10ac4facdde6c01c12bae6d4ffdd98239340819da448def7b282dfe076442f6
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YY1J+OTOkaX:z6QFElP6n+gKmddpMOtEvwDpj31iko

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/864-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023264-13.dat	CryptoLocker_rule2
behavioral2/memory/864-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3980-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/864-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023264-13.dat	CryptoLocker_set1
behavioral2/memory/864-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3980-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/864-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023264-13.dat	UPX
behavioral2/memory/864-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3980-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-06-04_8503e62f8d7938b273a76cdf33e6468d_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3980	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/864-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000023264-13.dat	upx
behavioral2/memory/864-25-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3980-26-0x0000000000500000-0x0000000000510000-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 864 wrote to memory of 3980	864	2024-06-04_8503e62f8d7938b273a76cdf33e6468d_cryptolocker.exe	89
PID 864 wrote to memory of 3980	864	2024-06-04_8503e62f8d7938b273a76cdf33e6468d_cryptolocker.exe	89
PID 864 wrote to memory of 3980	864	2024-06-04_8503e62f8d7938b273a76cdf33e6468d_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-06-04_8503e62f8d7938b273a76cdf33e6468d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-04_8503e62f8d7938b273a76cdf33e6468d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:864
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3980

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3804 --field-trial-handle=2264,i,15001568551143786084,90255922961447677,262144 --variations-seed-version /prefetch:8
1⤵
PID:2596

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
54KB

MD5
7e50d8f3c333c66edcbf319e8c9a3c38

SHA1
c4e62551d0838ee3aca103587ab2491a4d46f0d9

SHA256
3c5ad7ff754164ccb20bee6b4be4f57ad2a0369ff7496e7a7d095ff9511fbd20

SHA512
ad113b155581f9e3fddc7ae52f74751b4a6ff1e5ea09e5632aefd7c1e15eff9e1a17ac2a672de1b928041cbe640178d8bfa178c46fdc507b6c50c48bf6bcc35c

Download Submit
memory/864-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/864-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/864-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/864-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/864-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3980-24-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/3980-18-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/3980-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download