c1bf2863c67d1504c3408a0ae3a6801847f6655d14ebf8e8a6d87d201911a7ee

Analysis

max time kernel
150s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
16-04-2024 01:26

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General

Target

2024-04-16_3f0f207a9884d2aa02cb1c1e08070361_cryptolocker.exe
Size

100KB
MD5

3f0f207a9884d2aa02cb1c1e08070361
SHA1

6e782dcce382d0ac47a18f2cf7ed0804103206bd
SHA256

c1bf2863c67d1504c3408a0ae3a6801847f6655d14ebf8e8a6d87d201911a7ee
SHA512

5e88966e3c789effc69b9bcabbd8a5c03840dae6741106f53b80222212d5e3a82757acd68713c50ff4c1c00c7fd9e6c23b62714d88c41b204975438852db4d8f
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgpwqWsviPeBa:AnBdOOtEvwDpj6zR

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3708-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023246-13.dat	CryptoLocker_rule2
behavioral2/memory/3708-20-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3500-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3708-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023246-13.dat	CryptoLocker_set1
behavioral2/memory/3708-20-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3500-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3708-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x0008000000023246-13.dat	UPX
behavioral2/memory/3708-20-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/3500-26-0x0000000000500000-0x000000000050F000-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	2024-04-16_3f0f207a9884d2aa02cb1c1e08070361_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3500	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3708-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x0008000000023246-13.dat	upx
behavioral2/memory/3708-20-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/3500-26-0x0000000000500000-0x000000000050F000-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 3708 wrote to memory of 3500	3708	2024-04-16_3f0f207a9884d2aa02cb1c1e08070361_cryptolocker.exe	91
PID 3708 wrote to memory of 3500	3708	2024-04-16_3f0f207a9884d2aa02cb1c1e08070361_cryptolocker.exe	91
PID 3708 wrote to memory of 3500	3708	2024-04-16_3f0f207a9884d2aa02cb1c1e08070361_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-04-16_3f0f207a9884d2aa02cb1c1e08070361_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-16_3f0f207a9884d2aa02cb1c1e08070361_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3708
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3500

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=1408 --field-trial-handle=2744,i,16362475727591565961,3676688664819797550,262144 --variations-seed-version /prefetch:8
1⤵
PID:2724

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
100KB

MD5
b05cdd5d640bb018ccb48914f3391a53

SHA1
fed2a6679b203f8b717b41e639dbbb470970aef0

SHA256
4bbf44bc99e01d7b7fa0e5f3b351f71c4bfbd7dc86c7a6175bb2beed7710a7f3

SHA512
b76680ff35c0ea57f3307705a8efafb829801990d9d33974326acc478afb0ad93d15aa3c8e89810609d179c2b2e809b48d0edc13b9e83f8fe855902166e42a86

Download Submit
memory/3500-18-0x0000000001F80000-0x0000000001F86000-memory.dmp

Filesize
24KB

Download
memory/3500-21-0x0000000000680000-0x0000000000686000-memory.dmp

Filesize
24KB

Download
memory/3500-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3708-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3708-1-0x00000000007C0000-0x00000000007C6000-memory.dmp

Filesize
24KB

Download
memory/3708-2-0x00000000007C0000-0x00000000007C6000-memory.dmp

Filesize
24KB

Download
memory/3708-3-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/3708-20-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download