e5c3f0a1807c03abcf9c7c486760e6aca0f42b56d70ebea0327214651c3e13fd

Analysis

max time kernel
160s
max time network
173s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
19/03/2024, 17:56

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General

Target

2024-03-19_d85028254b4315bcea9c9d21ea81fbc7_cryptolocker.exe
Size

73KB
MD5

d85028254b4315bcea9c9d21ea81fbc7
SHA1

f2e1f699885d21bb051ba45e11b8fd046e1ba63f
SHA256

e5c3f0a1807c03abcf9c7c486760e6aca0f42b56d70ebea0327214651c3e13fd
SHA512

0ff9ffd146d584a89976ed3b2ff99ad300fda67dbb9c1341dfa465184dcbc27c5db2d0e4b34fe65546756b874d196443e988f2209532419b17af3d1f2d5ad736
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsal8ZJ:1nK6a+qdOOtEvwDpj9

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3704-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3704-10-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002325c-14.dat	CryptoLocker_rule2
behavioral2/memory/2672-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2672-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/3704-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/3704-10-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000002325c-14.dat	CryptoLocker_set1
behavioral2/memory/2672-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/2672-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/3704-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/3704-10-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x000700000002325c-14.dat	UPX
behavioral2/memory/2672-18-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/2672-26-0x0000000000500000-0x000000000050F311-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	2024-03-19_d85028254b4315bcea9c9d21ea81fbc7_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2672	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3704-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/3704-10-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x000700000002325c-14.dat	upx
behavioral2/memory/2672-18-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/2672-26-0x0000000000500000-0x000000000050F311-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 3704 wrote to memory of 2672	3704	2024-03-19_d85028254b4315bcea9c9d21ea81fbc7_cryptolocker.exe	102
PID 3704 wrote to memory of 2672	3704	2024-03-19_d85028254b4315bcea9c9d21ea81fbc7_cryptolocker.exe	102
PID 3704 wrote to memory of 2672	3704	2024-03-19_d85028254b4315bcea9c9d21ea81fbc7_cryptolocker.exe	102

C:\Users\Admin\AppData\Local\Temp\2024-03-19_d85028254b4315bcea9c9d21ea81fbc7_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-19_d85028254b4315bcea9c9d21ea81fbc7_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3704
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2672

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=1408 --field-trial-handle=2276,i,5697607538120380977,9987005253899555344,262144 --variations-seed-version /prefetch:8
1⤵
PID:2120

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
73KB

MD5
ebb5e9092cfae236d883640e22809a9c

SHA1
cce250024dfbcce3cf2f0bb91a71921fbc92ecf7

SHA256
9c58df65fa898bd4b51298e0bf1ba5f286bea34dd2f81d4b0e242621ddede9f9

SHA512
913b292a1d0bcdc7d736e30244d746a9657299eb457f4a9284351bc1dc8560cd38317fdf46b4ff96e381ae1d2444a77bef5c45fd43a0d050bc45b3a1962957d8

Download Submit
memory/2672-18-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2672-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3704-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3704-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3704-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3704-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3704-10-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download