80a4d610fd7efa48b9ebe6d26a3ebab8d920137cd6ec8a089cb257829631c5fc

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
03-05-2024 00:28

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General

Target

2024-05-03_7b00119de0a2b9f8f84bc95a4c853750_cryptolocker.exe
Size

38KB
MD5

7b00119de0a2b9f8f84bc95a4c853750
SHA1

6e576080d74becf49fece80cb1f501e9b2d3bb27
SHA256

80a4d610fd7efa48b9ebe6d26a3ebab8d920137cd6ec8a089cb257829631c5fc
SHA512

2b8b8d3db08f0d0675adbc9b0bfa2fdde2b3cafa5434390dab986101a11b224220bb1eeef913fc21cdbf2ac0956c5ce463c456af78c8effcfe72d774690a949a
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYd:qDdFJy3QMOtEvwDpjjWMl7TI

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4860-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000b00000002321b-13.dat	CryptoLocker_rule2
behavioral2/memory/4860-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4896-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4860-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000b00000002321b-13.dat	CryptoLocker_set1
behavioral2/memory/4860-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4896-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4860-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000b00000002321b-13.dat	UPX
behavioral2/memory/4860-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4896-26-0x0000000000500000-0x0000000000510000-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	2024-05-03_7b00119de0a2b9f8f84bc95a4c853750_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4896	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4860-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000b00000002321b-13.dat	upx
behavioral2/memory/4860-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4896-26-0x0000000000500000-0x0000000000510000-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 4860 wrote to memory of 4896	4860	2024-05-03_7b00119de0a2b9f8f84bc95a4c853750_cryptolocker.exe	92
PID 4860 wrote to memory of 4896	4860	2024-05-03_7b00119de0a2b9f8f84bc95a4c853750_cryptolocker.exe	92
PID 4860 wrote to memory of 4896	4860	2024-05-03_7b00119de0a2b9f8f84bc95a4c853750_cryptolocker.exe	92

C:\Users\Admin\AppData\Local\Temp\2024-05-03_7b00119de0a2b9f8f84bc95a4c853750_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-03_7b00119de0a2b9f8f84bc95a4c853750_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4860
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4896

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=4092 --field-trial-handle=2280,i,716736634476467098,11449718822158202904,262144 --variations-seed-version /prefetch:8
1⤵
PID:1960

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
38KB

MD5
ee4ecd9a0e498a443b63b8b4a9121333

SHA1
f44e96910a74578061a8055778a5316e3f8ff726

SHA256
e6120ca5c02380c88b4879a34503ff9a5f3d271c420e76a2b48b9e92b4aa256f

SHA512
4ebd268e3aee734b60cf708c1401b86813e6a737c33012d80071da90b4f30c6bd151549478137f248fe78a1d238ca63e34cd6630c0799727d7c71bb07d014989

Download Submit
memory/4860-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4860-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/4860-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/4860-3-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/4860-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4896-19-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/4896-25-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4896-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download