c2deac72cff1e6263973563a70af5037d54116ea17c6f6bc28bb924334a93a2c

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
25/03/2024, 22:29

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General

Target

2024-03-25_3187a5b4ca4476f584ea1b855c32d429_cryptolocker.exe
Size

117KB
MD5

3187a5b4ca4476f584ea1b855c32d429
SHA1

df277aa5d41eee1da080e2d7cd44ce29db9bfd8e
SHA256

c2deac72cff1e6263973563a70af5037d54116ea17c6f6bc28bb924334a93a2c
SHA512

acc7767fcb2d8c032db69f9ff1818026783a784836441d171fde1e161e90cef343f9d08c31c0664fed1a155ffc6edf2d1b6533230d9c57bafbc22ece9a7e1d50
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwNgp01I:z6a+CdOOtEvwDpjcz2

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2336-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002326a-13.dat	CryptoLocker_rule2
behavioral2/memory/2336-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2280-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2336-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000800000002326a-13.dat	CryptoLocker_set1
behavioral2/memory/2336-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2280-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2336-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000800000002326a-13.dat	UPX
behavioral2/memory/2336-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2280-26-0x0000000000500000-0x0000000000510000-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	2024-03-25_3187a5b4ca4476f584ea1b855c32d429_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2280	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2336-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000800000002326a-13.dat	upx
behavioral2/memory/2336-19-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2280-26-0x0000000000500000-0x0000000000510000-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 2336 wrote to memory of 2280	2336	2024-03-25_3187a5b4ca4476f584ea1b855c32d429_cryptolocker.exe	98
PID 2336 wrote to memory of 2280	2336	2024-03-25_3187a5b4ca4476f584ea1b855c32d429_cryptolocker.exe	98
PID 2336 wrote to memory of 2280	2336	2024-03-25_3187a5b4ca4476f584ea1b855c32d429_cryptolocker.exe	98

C:\Users\Admin\AppData\Local\Temp\2024-03-25_3187a5b4ca4476f584ea1b855c32d429_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-25_3187a5b4ca4476f584ea1b855c32d429_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2336
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2280

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=3688 --field-trial-handle=2252,i,16022092570067181109,3235558581947505669,262144 --variations-seed-version /prefetch:8
1⤵
PID:1380

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
117KB

MD5
0b45753f629f82704c47677be31f7f73

SHA1
7eed22b29e245a7f8b9314f9b468f0ed0f2278a4

SHA256
57baa6d6df26c96618780a3fcb718b88a8645ff9de73610a7da7da74ccb039f5

SHA512
5082c725fca6cda9ba32ef1ce5b8759d0b1a0ee441962e83865c0690bb5f660a03021c2124faaae621f0c47b29f1893d96269fb7128d72034d376b3b946a9cc2

Download Submit
memory/2280-18-0x0000000000510000-0x0000000000516000-memory.dmp

Filesize
24KB

Download
memory/2280-20-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2280-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2336-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2336-1-0x0000000002310000-0x0000000002316000-memory.dmp

Filesize
24KB

Download
memory/2336-2-0x0000000002310000-0x0000000002316000-memory.dmp

Filesize
24KB

Download
memory/2336-3-0x0000000002230000-0x0000000002236000-memory.dmp

Filesize
24KB

Download
memory/2336-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download