dfe666f4a5d99ceaf7132edc26c5aa50fdea7eea557fc6747db536616a31e674

Analysis

max time kernel
141s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
26/05/2024, 15:29

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General

Target

2024-05-26_8a52623a2ae0e361207cc0502b827242_cryptolocker.exe
Size

46KB
MD5

8a52623a2ae0e361207cc0502b827242
SHA1

acc63902d9098917e49f35dd37ff02c5691235b7
SHA256

dfe666f4a5d99ceaf7132edc26c5aa50fdea7eea557fc6747db536616a31e674
SHA512

5644a22be13056e3f4cebf5d215a062659a1a17f69cc4685982f2fb9ad535dcba824141643a877c7a4480a16dd581462e5fe26d0a52c9c9cdb4b41495ec2fa87
SSDEEP

768:P6LsoEEeegiZPvEhHS5+Mh/QtOOtEvwDpjBpaD3TUogs/VXpAPJ2K:P6QFElP6k+MRQMOtEvwDpjBQpVX1K

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4848-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023256-13.dat	CryptoLocker_rule2
behavioral2/memory/4848-25-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/440-26-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4848-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023256-13.dat	CryptoLocker_set1
behavioral2/memory/4848-25-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/memory/440-26-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1

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	2024-05-26_8a52623a2ae0e361207cc0502b827242_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
440	asih.exe

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 4848 wrote to memory of 440	4848	2024-05-26_8a52623a2ae0e361207cc0502b827242_cryptolocker.exe	90
PID 4848 wrote to memory of 440	4848	2024-05-26_8a52623a2ae0e361207cc0502b827242_cryptolocker.exe	90
PID 4848 wrote to memory of 440	4848	2024-05-26_8a52623a2ae0e361207cc0502b827242_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-05-26_8a52623a2ae0e361207cc0502b827242_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-26_8a52623a2ae0e361207cc0502b827242_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4848
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:440

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=4164 --field-trial-handle=2280,i,11703952675008463361,17436195144517971517,262144 --variations-seed-version /prefetch:8
1⤵
PID:4856

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
46KB

MD5
900964feef5f7722d5a3ce6dea2a57e9

SHA1
bbc3409f31de3263f3bfad829a5ec688bed6a333

SHA256
e14b8e2e2250429b45f663d72a5ba1e088f08d99573169a2d9b740f3c3fee403

SHA512
1601582b4e92a5ce1b64f3e155cd39fad259e1f435bda6c5b9ed517a7154d3813102e164a3dfb8767aa2ec24707c5ecbdddec9648a123872dbe82c73fc076eb4

Download Submit
memory/440-18-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/440-19-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/440-26-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/4848-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/4848-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4848-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4848-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4848-25-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download