99060952dc3e3a06491a3674576a88618566498d5c7f246097f52c496f751710

Analysis

max time kernel
143s
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
16/05/2024, 20:14

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General

Target

2024-05-16_f34bef990adabcd0f681715d1bbc4040_cryptolocker.exe
Size

52KB
MD5

f34bef990adabcd0f681715d1bbc4040
SHA1

1b9718612d39b60ad533a10f40733755a2926af9
SHA256

99060952dc3e3a06491a3674576a88618566498d5c7f246097f52c496f751710
SHA512

2022e38c8e008c80b6499c2cc3f079f13dd025c859c5485f7480d22266fcee98f46deac18d93ed5fa27e31b5dd782a17ea9887271a707bce37ce0e3e3d45786f
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YY1J+OTOeq:z6QFElP6n+gKmddpMOtEvwDpj31ieq

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4336-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023250-13.dat	CryptoLocker_rule2
behavioral2/memory/4336-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3404-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4336-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023250-13.dat	CryptoLocker_set1
behavioral2/memory/4336-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3404-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4336-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023250-13.dat	UPX
behavioral2/memory/4336-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3404-26-0x0000000000500000-0x0000000000510000-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	2024-05-16_f34bef990adabcd0f681715d1bbc4040_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3404	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4336-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000023250-13.dat	upx
behavioral2/memory/4336-25-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3404-26-0x0000000000500000-0x0000000000510000-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 4336 wrote to memory of 3404	4336	2024-05-16_f34bef990adabcd0f681715d1bbc4040_cryptolocker.exe	92
PID 4336 wrote to memory of 3404	4336	2024-05-16_f34bef990adabcd0f681715d1bbc4040_cryptolocker.exe	92
PID 4336 wrote to memory of 3404	4336	2024-05-16_f34bef990adabcd0f681715d1bbc4040_cryptolocker.exe	92

C:\Users\Admin\AppData\Local\Temp\2024-05-16_f34bef990adabcd0f681715d1bbc4040_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-16_f34bef990adabcd0f681715d1bbc4040_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4336
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3404

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=4144 --field-trial-handle=3192,i,2785050981002401924,4037047756083432660,262144 --variations-seed-version /prefetch:8
1⤵
PID:3740

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
52KB

MD5
83572b619e6f277b71b95e5682ee39e8

SHA1
15e89a9a6d4d9ce06642e7eb1f38c267e6044267

SHA256
5277c8df1cc90a2dc4344e89d343da602fda80b09e26b80c1108120c8eec8837

SHA512
3679fef4ab3b0e4f7d6bd23da03136cc5b7a0f9df6ea14491024db95f956da2eae460c177db24e03cfe35d3f0529c383c2803c20ee1965aa1987e1d877248c27

Download Submit
memory/3404-18-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/3404-19-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/3404-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4336-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4336-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/4336-2-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/4336-3-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/4336-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download