2912e4637f5103ef92bcf573732ebed53a23f513aeeb3ba00ad9ad159a8fe51a

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
20/05/2024, 06:47

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General

Target

2024-05-20_a031ac1125ca1369990c5a270cefee44_cryptolocker.exe
Size

59KB
MD5

a031ac1125ca1369990c5a270cefee44
SHA1

315804dd919d44d93ce180ffe46b2e16cfdf6f13
SHA256

2912e4637f5103ef92bcf573732ebed53a23f513aeeb3ba00ad9ad159a8fe51a
SHA512

c59dbfa8be4362e1dfb9888e234589a8863e1e6669237d5c2371250cd2ec97e1b027f3b16927a836a7ac972887af48b0154bdeb7f9429ed04417d5ccfadf87da
SSDEEP

768:H6LsoEEeegiZPvEhHSG+gk5NQXtckstOOtEvwDpjhBaD3TUogs/VXpAPjX:H6QFElP6n+gou9cvMOtEvwDpjCpVXe

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4280-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0009000000023607-13.dat	CryptoLocker_rule2
behavioral2/memory/4280-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2108-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4280-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0009000000023607-13.dat	CryptoLocker_set1
behavioral2/memory/4280-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2108-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4280-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0009000000023607-13.dat	UPX
behavioral2/memory/4280-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2108-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	2024-05-20_a031ac1125ca1369990c5a270cefee44_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2108	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4280-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0009000000023607-13.dat	upx
behavioral2/memory/4280-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2108-26-0x0000000000500000-0x0000000000510000-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 4280 wrote to memory of 2108	4280	2024-05-20_a031ac1125ca1369990c5a270cefee44_cryptolocker.exe	90
PID 4280 wrote to memory of 2108	4280	2024-05-20_a031ac1125ca1369990c5a270cefee44_cryptolocker.exe	90
PID 4280 wrote to memory of 2108	4280	2024-05-20_a031ac1125ca1369990c5a270cefee44_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-05-20_a031ac1125ca1369990c5a270cefee44_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-20_a031ac1125ca1369990c5a270cefee44_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4280
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2108

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 --field-trial-handle=4380,i,15142778360084620907,1763097090506261076,262144 --variations-seed-version --mojo-platform-channel-handle=4376 /prefetch:8
1⤵
PID:876

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
59KB

MD5
b2dde670b4a865368313183364d078ce

SHA1
eef489c0ce0fe6218ee618ecd0c1ef96cd0d896d

SHA256
2b7d0c15b44a57390e1a2674968e1abdea157c42e6af9a8921414d42b4d3d778

SHA512
cebaa9e5c636251b871279151fb89107434fa171f8d6e3179dff5c2ad387a5c823c512fad1d454bc3b7014bacc6b66cf63134edf071ee5064b08affa9b4e013e

Download Submit
memory/2108-21-0x0000000001F80000-0x0000000001F86000-memory.dmp

Filesize
24KB

Download
memory/2108-25-0x0000000001F60000-0x0000000001F66000-memory.dmp

Filesize
24KB

Download
memory/2108-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4280-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4280-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/4280-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/4280-9-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/4280-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download