ac9beb13ac13282a57adc29bfbe36620ecfb98295fff31b0d497540059e74359

Analysis

max time kernel
142s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
08/03/2024, 05:38

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General

Target

2024-03-08_33b81f5b19dc97db87af3be7fbc7eb16_cryptolocker.exe
Size

57KB
MD5

33b81f5b19dc97db87af3be7fbc7eb16
SHA1

eacd0bd287994f60549a806eeaad835c6d76bbed
SHA256

ac9beb13ac13282a57adc29bfbe36620ecfb98295fff31b0d497540059e74359
SHA512

5df3ab00de99b851c56f68f00433fab736d979120713d5deb7b3f3fe0b9597162f3a5c8bf7812e03c6816b649367129d8a3609e2ff5c18146209747522026b5d
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YMLam5ax8ikfk:z6QFElP6n+gKmddpMOtEvwDpj9aYai8

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3244-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000400000002271f-13.dat	CryptoLocker_rule2
behavioral2/memory/3244-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1612-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3244-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000400000002271f-13.dat	CryptoLocker_set1
behavioral2/memory/3244-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1612-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3244-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000400000002271f-13.dat	UPX
behavioral2/memory/3244-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1612-26-0x0000000000500000-0x0000000000510000-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	2024-03-08_33b81f5b19dc97db87af3be7fbc7eb16_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1612	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3244-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000400000002271f-13.dat	upx
behavioral2/memory/3244-25-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1612-26-0x0000000000500000-0x0000000000510000-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 3244 wrote to memory of 1612	3244	2024-03-08_33b81f5b19dc97db87af3be7fbc7eb16_cryptolocker.exe	97
PID 3244 wrote to memory of 1612	3244	2024-03-08_33b81f5b19dc97db87af3be7fbc7eb16_cryptolocker.exe	97
PID 3244 wrote to memory of 1612	3244	2024-03-08_33b81f5b19dc97db87af3be7fbc7eb16_cryptolocker.exe	97

C:\Users\Admin\AppData\Local\Temp\2024-03-08_33b81f5b19dc97db87af3be7fbc7eb16_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-08_33b81f5b19dc97db87af3be7fbc7eb16_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3244
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1612

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=4048 --field-trial-handle=3060,i,1774866140584649235,8085848018931772189,262144 --variations-seed-version /prefetch:8
1⤵
PID:2452

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
57KB

MD5
c41664ca06e7fa15637543385e6931c0

SHA1
60829e2e50c8485bcfe58f2c8db5ea7f6eb5d1d2

SHA256
dcc615c2e1cc60df1a780a46871ef7968441757d761706820ae29b50127370d5

SHA512
c6a7097bb382e2f7db57115b2f671e32290f274c100702f4cb2dab8df162d1602e3eceb63cda35acce1d90e7de1758f50bb4787caa4b77d56deee2fbdf6a77b4

Download Submit
memory/1612-18-0x0000000002140000-0x0000000002146000-memory.dmp

Filesize
24KB

Download
memory/1612-19-0x0000000002040000-0x0000000002046000-memory.dmp

Filesize
24KB

Download
memory/1612-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3244-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3244-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3244-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3244-3-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/3244-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download