1ebd2d0ab3604a34190578551a008aa481fc9659868af22e7a7894894bdc9471

Analysis

max time kernel
144s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
21-05-2024 16:04

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General

Target

2024-05-21_e876d7dda0a13c369e2cbf256453329b_cryptolocker.exe
Size

48KB
MD5

e876d7dda0a13c369e2cbf256453329b
SHA1

3cfd13b5b2736140d11073bbb24e0f4461d0cf0f
SHA256

1ebd2d0ab3604a34190578551a008aa481fc9659868af22e7a7894894bdc9471
SHA512

d3c8ba1cfd8c032dba6b4527df9830eaf8518d773e9f6e743a539146b4be998ccd56ede4d1e6ae924ab80d01e00f37005cd1b61e9bfb7d25b2e94ee505070ea7
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2MoL5c:qmbhXDmjr5MOtEvwDpj5cDtKkQZQVe

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3540-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002325c-13.dat	CryptoLocker_rule2
behavioral2/memory/3540-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2452-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/3540-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2452-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3540-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000800000002325c-13.dat	UPX
behavioral2/memory/3540-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2452-27-0x0000000000500000-0x0000000000510000-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-05-21_e876d7dda0a13c369e2cbf256453329b_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2452	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 3540 wrote to memory of 2452	3540	2024-05-21_e876d7dda0a13c369e2cbf256453329b_cryptolocker.exe	91
PID 3540 wrote to memory of 2452	3540	2024-05-21_e876d7dda0a13c369e2cbf256453329b_cryptolocker.exe	91
PID 3540 wrote to memory of 2452	3540	2024-05-21_e876d7dda0a13c369e2cbf256453329b_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-05-21_e876d7dda0a13c369e2cbf256453329b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_e876d7dda0a13c369e2cbf256453329b_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3540
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2452

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=4148 --field-trial-handle=2280,i,4114443225282860369,4764091921472631035,262144 --variations-seed-version /prefetch:8
1⤵
PID:5092

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
48KB

MD5
8a9e617b18c6222252dce95611a0ecaf

SHA1
8c1a409f2775aa07b475403eee32b3b0e0e1bd62

SHA256
1fa194e5b48a7d8d0a104878e4a8af3d38f1196d4a01b6c3266fd4e8081fcebc

SHA512
61023f45dbfc76d337fe87961e245db13d4dde4b67b568cc1d87aab0fcb1d62840f5b9a3ef55db3a20a040e8879494e1a3ed77c727254f0cce7941031036c66f

Download Submit
memory/2452-18-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/2452-19-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/2452-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3540-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3540-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/3540-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/3540-3-0x0000000000510000-0x0000000000516000-memory.dmp

Filesize
24KB

Download
memory/3540-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download