c91f27d812caea0209e89fcded4803cddbfe85862ed02542fb3ed5d9c7fd46dc

Analysis

max time kernel
136s
max time network
167s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
24-05-2024 03:58

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General

Target

2024-05-24_ae527a35fe064cec4221b30fbbe6cad8_cryptolocker.exe
Size

92KB
MD5

ae527a35fe064cec4221b30fbbe6cad8
SHA1

b0512cd967fe99e8c1748b0f928d6e8e3919c4d3
SHA256

c91f27d812caea0209e89fcded4803cddbfe85862ed02542fb3ed5d9c7fd46dc
SHA512

84f785383c3179b143acd1c8bbecfa82bcc7345b31769df693b904998bf35d4a4686557569ecc0d07f03954be907d400277ea44288281417c562d1e7cd77a351
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAA/D5:n6a+1SEOtEvwDpjYYvQd2Pe

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4752-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/4752-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3000-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4752-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/4752-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3000-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4752-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/4752-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3000-26-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-24_ae527a35fe064cec4221b30fbbe6cad8_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-05-24_ae527a35fe064cec4221b30fbbe6cad8_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3000 asih.exe

pid	process
3000	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4752-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/4752-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3000-26-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-24_ae527a35fe064cec4221b30fbbe6cad8_cryptolocker.exe

description	pid	process	target process
PID 4752 wrote to memory of 3000	4752	2024-05-24_ae527a35fe064cec4221b30fbbe6cad8_cryptolocker.exe	asih.exe
PID 4752 wrote to memory of 3000	4752	2024-05-24_ae527a35fe064cec4221b30fbbe6cad8_cryptolocker.exe	asih.exe
PID 4752 wrote to memory of 3000	4752	2024-05-24_ae527a35fe064cec4221b30fbbe6cad8_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-24_ae527a35fe064cec4221b30fbbe6cad8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-24_ae527a35fe064cec4221b30fbbe6cad8_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4752
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3000

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=3808 --field-trial-handle=2280,i,716736634476467098,11449718822158202904,262144 --variations-seed-version /prefetch:8
1⤵
PID:3744

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
92KB

MD5
b9c0fae7b2fdb499767472de4169de3a

SHA1
184a671e15e0d3f2efa976dfff529d4787589d3a

SHA256
a81d4dd4526a7c99bf21c3129a162c42dedd44ba668af1d01d89991235a7f5e9

SHA512
c8cc359ff03fbf8496adaf4f08cba74470f32e401022f4ca49d7b195b7f3d7ebe67132e66ddafd3a1f43c987f90a2bdef9d07aaec814b2cdb8a085c71d30609f

Download Submit
memory/3000-19-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/3000-25-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/3000-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4752-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4752-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4752-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4752-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4752-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download