fb620bf19bf4a646bdf5b41f5f06491291ec2b802178d3dd2b48810a05d217d6

Analysis

max time kernel
142s
max time network
166s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
10/05/2024, 21:26

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General

Target

2024-05-10_3caa7094ed7125f07448eeef9db3b121_cryptolocker.exe
Size

45KB
MD5

3caa7094ed7125f07448eeef9db3b121
SHA1

30c6ba47433c22cd6f36c602d365275e95732d62
SHA256

fb620bf19bf4a646bdf5b41f5f06491291ec2b802178d3dd2b48810a05d217d6
SHA512

9d6dd293f9bf34562d08606c50987e0050226caad42562858e7fe863ab158a33d10a3751a4d3ffbfe14666d5d087d7f6bdf451d4a2fd53b8a1946ca128a43df3
SSDEEP

768:P6LsoVEeegiZPvEhHSP+gp/QtOOtEvwDpjBBMLZdzuqpXsiE8Wq/DpkH+:P6Q0ElP6G+gJQMOtEvwDpjB8WMls+

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4836-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4836-10-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023264-14.dat	CryptoLocker_rule2
behavioral2/memory/1660-26-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4836-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4836-10-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023264-14.dat	CryptoLocker_set1
behavioral2/memory/1660-26-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1

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	2024-05-10_3caa7094ed7125f07448eeef9db3b121_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1660	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 4836 wrote to memory of 1660	4836	2024-05-10_3caa7094ed7125f07448eeef9db3b121_cryptolocker.exe	91
PID 4836 wrote to memory of 1660	4836	2024-05-10_3caa7094ed7125f07448eeef9db3b121_cryptolocker.exe	91
PID 4836 wrote to memory of 1660	4836	2024-05-10_3caa7094ed7125f07448eeef9db3b121_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-05-10_3caa7094ed7125f07448eeef9db3b121_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-10_3caa7094ed7125f07448eeef9db3b121_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4836
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1660

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=4156 --field-trial-handle=2264,i,15001568551143786084,90255922961447677,262144 --variations-seed-version /prefetch:8
1⤵
PID:2428

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
45KB

MD5
5fb84babbb82e7a982a45786c8ed9148

SHA1
e1dc5c38757e0bccdaf160081eed6e1589e41097

SHA256
767bac96ddfa21ff70a106a9270443dd042924fba7d1827a5bdc5f3f21174da1

SHA512
19be79acff81d07b20a8c6fa6cc553ea04f15697a4827c9286f1311f409a09078c453ed44d08d886f384acaf484cdb8c6baa03db8f2ab1c6d50666aec290a4e9

Download Submit
memory/1660-19-0x0000000000640000-0x0000000000646000-memory.dmp

Filesize
24KB

Download
memory/1660-25-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/1660-26-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/4836-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/4836-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4836-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4836-3-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/4836-10-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download