a96b11bb792a0c45497dd4802b3c84a4a2c481a2d7da0894f2fb34ffc8383e9f

Analysis

max time kernel
146s
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
27-04-2024 22:37

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General

Target

2024-04-27_9a668da2005f09f221ccc2ce6fac2326_cryptolocker.exe
Size

38KB
MD5

9a668da2005f09f221ccc2ce6fac2326
SHA1

1a03fcf42cd760563c486e7a04eb848c6ee7b766
SHA256

a96b11bb792a0c45497dd4802b3c84a4a2c481a2d7da0894f2fb34ffc8383e9f
SHA512

a99c1cef4f48f34213fb7f9ed251af7f098e3e82999488f552d2e326725907fbe6feae2a732fd2fddda28afb5b4f1e5fee4bfc8a435422330dfbbcfd57da628f
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaBw:qDdFJy3QMOtEvwDpjjWMl7TdS

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3292-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/3292-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3744-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3292-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/3292-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3744-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3292-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/3292-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3744-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-04-27_9a668da2005f09f221ccc2ce6fac2326_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-04-27_9a668da2005f09f221ccc2ce6fac2326_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3744 asih.exe

pid	process
3744	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/3292-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/3292-26-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3744-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-04-27_9a668da2005f09f221ccc2ce6fac2326_cryptolocker.exe

description	pid	process	target process
PID 3292 wrote to memory of 3744	3292	2024-04-27_9a668da2005f09f221ccc2ce6fac2326_cryptolocker.exe	asih.exe
PID 3292 wrote to memory of 3744	3292	2024-04-27_9a668da2005f09f221ccc2ce6fac2326_cryptolocker.exe	asih.exe
PID 3292 wrote to memory of 3744	3292	2024-04-27_9a668da2005f09f221ccc2ce6fac2326_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-27_9a668da2005f09f221ccc2ce6fac2326_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-27_9a668da2005f09f221ccc2ce6fac2326_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3292

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:3744

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=4792 --field-trial-handle=2328,i,5873823382323802923,13134441441264702821,262144 --variations-seed-version /prefetch:8
1⤵
PID:1020

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
38KB

MD5
319c8fb4ba04c4c0283eb41598b81e77

SHA1
21dd581722524540eb13f2049cff550432df7a3d

SHA256
6280d66ea74305355209e415214795fc7289681f7cd23ad1445e59ddfcdbf8af

SHA512
390c6fecd6bb15f4a5a1ef99b4ccc947112d736ad4d4e2a0fe71ee72120e1a9a83c46c56e344cf3136f171e7c2e2fe12cc7c8e60ae908f6176bbb7a026e3abf2

Download Submit
memory/3292-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3292-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/3292-2-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/3292-3-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/3292-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3744-18-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/3744-24-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/3744-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download