084715888527af9fa1f579c1530bfe3d6dc01d31be46872ce51d150eb8a6213e

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, 00:46

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General

Target

2024-05-10_1d352d74c3ff8daa989c41e4a9700cbc_cryptolocker.exe
Size

69KB
MD5

1d352d74c3ff8daa989c41e4a9700cbc
SHA1

f83f23e91e9e0b44316ca052d224289f0180d0cd
SHA256

084715888527af9fa1f579c1530bfe3d6dc01d31be46872ce51d150eb8a6213e
SHA512

9565e8e1a623032e214bfb3e5e1481fb094477556d64dee8b925bf8f212ca27e32767d7a7b67cfb55e04c971af0f7675b7e3c58a895ef64b6f14c00c6db35fa4
SSDEEP

1536:quJu9cvMOtEvwDpjWYTjipvF2bx1PQApF:78SEOtEvwDpjWYvQd2Pr

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1328-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00090000000235db-13.dat	CryptoLocker_rule2
behavioral2/memory/1328-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/944-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1328-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00090000000235db-13.dat	CryptoLocker_set1
behavioral2/memory/1328-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/944-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1328-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x00090000000235db-13.dat	UPX
behavioral2/memory/1328-18-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/944-27-0x0000000000500000-0x000000000050F000-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-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	2024-05-10_1d352d74c3ff8daa989c41e4a9700cbc_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
944	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1328-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x00090000000235db-13.dat	upx
behavioral2/memory/1328-18-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/944-27-0x0000000000500000-0x000000000050F000-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 1328 wrote to memory of 944	1328	2024-05-10_1d352d74c3ff8daa989c41e4a9700cbc_cryptolocker.exe	93
PID 1328 wrote to memory of 944	1328	2024-05-10_1d352d74c3ff8daa989c41e4a9700cbc_cryptolocker.exe	93
PID 1328 wrote to memory of 944	1328	2024-05-10_1d352d74c3ff8daa989c41e4a9700cbc_cryptolocker.exe	93

C:\Users\Admin\AppData\Local\Temp\2024-05-10_1d352d74c3ff8daa989c41e4a9700cbc_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-10_1d352d74c3ff8daa989c41e4a9700cbc_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1328
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:944

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=4028,i,10373433614523925616,13586256558317053467,262144 --variations-seed-version --mojo-platform-channel-handle=4196 /prefetch:8
1⤵
PID:392

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
69KB

MD5
a730e8629ea55be8de39d48888e6e0d3

SHA1
9ca75bc7b55258b5d6b45c2b0030d38f3d564cd7

SHA256
c36857dcdd5a6f3e658e9882c1ec160321f8b3c9ffb068d891858e1a4c1612c3

SHA512
722ed51cd91a997a79decbdb2b706a7725e4b47a2bbeff25da61729f16cea628d8b1573acd16179f14044bad5fa245bd19faa175a1e6b24e5a3722dc5371e0ce

Download Submit
memory/944-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/944-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/944-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1328-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1328-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1328-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/1328-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1328-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download