b880fe80ef2ad98cf3797815e26eca7218c72f4d6655869971439e74986864a2

Analysis

max time kernel
150s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
06-03-2024 06:10

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General

Target

2024-03-06_856ee6a49938ea96ef482b455e5df32d_cryptolocker.exe
Size

31KB
MD5

856ee6a49938ea96ef482b455e5df32d
SHA1

299e6f6979f3e75c7ee9f5e9f10e756ffe002733
SHA256

b880fe80ef2ad98cf3797815e26eca7218c72f4d6655869971439e74986864a2
SHA512

00a61259f7372c93f3db8695bfbea346ebedf2672745d25fcbf1e2c862d549ffafdec5ed4e8474f040bfcbe424243e82a7b53b011f3792065829e56b9c7dcda9
SSDEEP

768:q0ZziOWwULueOSdE8tOOtEvwDpjeWaJIO/xu3N:q0zizzOSxMOtEvwDpj/arQ3N

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2992-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000001db2a-13.dat	CryptoLocker_rule2
behavioral2/memory/2992-24-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2612-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/2992-24-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2612-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2992-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000800000001db2a-13.dat	UPX
behavioral2/memory/2992-24-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2612-25-0x0000000000500000-0x0000000000510000-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-1-5-21-1904519900-954640453-4250331663-1000\Control Panel\International\Geo\Nation	2024-03-06_856ee6a49938ea96ef482b455e5df32d_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2612	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 2992 wrote to memory of 2612	2992	2024-03-06_856ee6a49938ea96ef482b455e5df32d_cryptolocker.exe	95
PID 2992 wrote to memory of 2612	2992	2024-03-06_856ee6a49938ea96ef482b455e5df32d_cryptolocker.exe	95
PID 2992 wrote to memory of 2612	2992	2024-03-06_856ee6a49938ea96ef482b455e5df32d_cryptolocker.exe	95

C:\Users\Admin\AppData\Local\Temp\2024-03-06_856ee6a49938ea96ef482b455e5df32d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-06_856ee6a49938ea96ef482b455e5df32d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2992
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2612

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=5032 --field-trial-handle=2272,i,1589057049575649654,2929151440327217574,262144 --variations-seed-version /prefetch:8
1⤵
PID:3780

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
31KB

MD5
b1178664520567724d4fd00595abb3f7

SHA1
cc252d668307fe224d53a3281d55c287025b9497

SHA256
97513d2f92da6e6bcb4d8203871c5ae844052cd4a0855b038753b4c50982d215

SHA512
95c3d6397b1da1f38a0097795bfb5f2ffd20f7398a7074ce5e5de87ada503d5ce29bde68402c84cfb2fc15c6261c56a7a294a09773d5657cab8c6f85ed8682f2

Download Submit
memory/2612-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2992-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2992-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2992-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2992-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2992-24-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download