5b694b29d08602c7a6d6f3e231350d638de929938e23a3435eeb9868be2311df

Analysis

max time kernel
151s
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
18/03/2024, 16:26

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General

Target

2024-03-18_2653c3f5a8e5ed9310da8d3a295f8265_cryptolocker.exe
Size

82KB
MD5

2653c3f5a8e5ed9310da8d3a295f8265
SHA1

bf7d3ae0249a0faa70c8245b3daa2a529bd61794
SHA256

5b694b29d08602c7a6d6f3e231350d638de929938e23a3435eeb9868be2311df
SHA512

d66fa3ea7d8b9c38590bd082f63afc48d15d4772c3b24ed9229ba12efe276023ad20bacc1d295862f6d67d2719ed52ec2e1e3194e5da102eee17f4f65ae074ad
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOT7vc:T6a+rdOOtEvwDpjNY

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4236-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000400000002271f-13.dat	CryptoLocker_rule2
behavioral2/memory/4236-21-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1388-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4236-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000400000002271f-13.dat	CryptoLocker_set1
behavioral2/memory/4236-21-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1388-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4236-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000400000002271f-13.dat	UPX
behavioral2/memory/4236-21-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1388-26-0x0000000000500000-0x0000000000510000-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	2024-03-18_2653c3f5a8e5ed9310da8d3a295f8265_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1388	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4236-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000400000002271f-13.dat	upx
behavioral2/memory/4236-21-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1388-26-0x0000000000500000-0x0000000000510000-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 4236 wrote to memory of 1388	4236	2024-03-18_2653c3f5a8e5ed9310da8d3a295f8265_cryptolocker.exe	100
PID 4236 wrote to memory of 1388	4236	2024-03-18_2653c3f5a8e5ed9310da8d3a295f8265_cryptolocker.exe	100
PID 4236 wrote to memory of 1388	4236	2024-03-18_2653c3f5a8e5ed9310da8d3a295f8265_cryptolocker.exe	100

C:\Users\Admin\AppData\Local\Temp\2024-03-18_2653c3f5a8e5ed9310da8d3a295f8265_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-18_2653c3f5a8e5ed9310da8d3a295f8265_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4236
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1388

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=4088 --field-trial-handle=2280,i,716736634476467098,11449718822158202904,262144 --variations-seed-version /prefetch:8
1⤵
PID:4320

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
83KB

MD5
6208efdcba82c900c3b90baf496a1faf

SHA1
db672d5aa08d0e640c20f42041bb8e1f724b545c

SHA256
76f0b8d3812ccb101dee4be7a59034811a5579a52c6bd7ea07263555d76ebb89

SHA512
7a994bced645f4c4158c92d35562849b73dc082954785146944ddc0433e801774c43128a3d2b2c16a8005d6df271e8e1d3549ddf770261e6066be43b4f817c41

Download Submit
memory/1388-18-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/1388-19-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/1388-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4236-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4236-1-0x0000000002140000-0x0000000002146000-memory.dmp

Filesize
24KB

Download
memory/4236-2-0x0000000002140000-0x0000000002146000-memory.dmp

Filesize
24KB

Download
memory/4236-3-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download
memory/4236-21-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download