5cc8bdd114baba54e0a05d78920d844ff24c02d3b483548d48902e44434574ae

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
10-05-2024 08:50

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General

Target

2024-05-10_de32f98c622751e97ce6daf1a297fdf5_cryptolocker.exe
Size

89KB
MD5

de32f98c622751e97ce6daf1a297fdf5
SHA1

681432a175363a15fc240e6ddb379e7e04b5e6fe
SHA256

5cc8bdd114baba54e0a05d78920d844ff24c02d3b483548d48902e44434574ae
SHA512

c6e544a87a372f453970d5fd1c4fb477a9e281e246eabf8d1d73c420f8c5cc51fb24401ae1e675464ea1a46c4b231a1a4271c6206ee9f2efa56992d841074de1
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAAc:n6a+1SEOtEvwDpjYYvQd2Pz

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1152-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0009000000023598-13.dat	CryptoLocker_rule2
behavioral2/memory/8-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1152-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/8-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/1152-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0009000000023598-13.dat	CryptoLocker_set1
behavioral2/memory/8-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1152-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/8-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/1152-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0009000000023598-13.dat	UPX
behavioral2/memory/8-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1152-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/8-27-0x0000000000500000-0x0000000000510000-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-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	2024-05-10_de32f98c622751e97ce6daf1a297fdf5_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
8	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1152-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0009000000023598-13.dat	upx
behavioral2/memory/8-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1152-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/8-27-0x0000000000500000-0x0000000000510000-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 1152 wrote to memory of 8	1152	2024-05-10_de32f98c622751e97ce6daf1a297fdf5_cryptolocker.exe	90
PID 1152 wrote to memory of 8	1152	2024-05-10_de32f98c622751e97ce6daf1a297fdf5_cryptolocker.exe	90
PID 1152 wrote to memory of 8	1152	2024-05-10_de32f98c622751e97ce6daf1a297fdf5_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-05-10_de32f98c622751e97ce6daf1a297fdf5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-10_de32f98c622751e97ce6daf1a297fdf5_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1152
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:8

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 --field-trial-handle=4176,i,13640054265074968359,8146127767143474550,262144 --variations-seed-version --mojo-platform-channel-handle=1036 /prefetch:8
1⤵
PID:2272

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
89KB

MD5
93d4f2d2d0970f53c8dc5e9030e2af46

SHA1
1b50d936fc2b416a37b6b773b54ee4c2cc7d71b4

SHA256
eddbeeecbc0804de355f5b0731182615b252048f99bab9556a78cb5cf9f1606c

SHA512
08f2080c5f06013c870e0a21f49b4dbecf7e50737d00136f25dfe48e450f3f42779703d385743b6eaab4463d30934ecf63e0156a6c2f38b7adb849c8cc6aa2c7

Download Submit
memory/8-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/8-20-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/8-26-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/8-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1152-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1152-1-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/1152-2-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/1152-9-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/1152-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download