ba68496b711dd56d3693c236b84f060873a7ef07f181d0fb9069fb4e935d84a4

Analysis

max time kernel
148s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
31-05-2024 22:42

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General

Target

2024-05-31_8b89739bf7e2026c41fd0a4b8a530190_cryptolocker.exe
Size

49KB
MD5

8b89739bf7e2026c41fd0a4b8a530190
SHA1

d9193a3bbe83b891bed3a1f157c56a9d1adf2484
SHA256

ba68496b711dd56d3693c236b84f060873a7ef07f181d0fb9069fb4e935d84a4
SHA512

c9b4f9d53234025a9bdbcdb7332342a42abb9e7a2cb89cde1aaf94bf6d425a94ebd8a02c696797fb4a3466e74173de23ab7f09cc44711603be51a0a07a188177
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2Mocbg:qmbhXDmjr5MOtEvwDpj5cDtKkQZQp

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2252-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00090000000235f6-13.dat	CryptoLocker_rule2
behavioral2/memory/2252-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1140-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/2252-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1140-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2252-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x00090000000235f6-13.dat	UPX
behavioral2/memory/2252-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1140-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	2024-05-31_8b89739bf7e2026c41fd0a4b8a530190_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1140	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 2252 wrote to memory of 1140	2252	2024-05-31_8b89739bf7e2026c41fd0a4b8a530190_cryptolocker.exe	90
PID 2252 wrote to memory of 1140	2252	2024-05-31_8b89739bf7e2026c41fd0a4b8a530190_cryptolocker.exe	90
PID 2252 wrote to memory of 1140	2252	2024-05-31_8b89739bf7e2026c41fd0a4b8a530190_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-05-31_8b89739bf7e2026c41fd0a4b8a530190_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-31_8b89739bf7e2026c41fd0a4b8a530190_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2252
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1140

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 --field-trial-handle=3988,i,18168883380598738769,14202261231630113808,262144 --variations-seed-version --mojo-platform-channel-handle=4300 /prefetch:8
1⤵
PID:2032

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
50KB

MD5
74c578b5b0b90c7421f19d60a1c5bcdc

SHA1
81a7a16825cce8f935bc565111e48b8d268f47f8

SHA256
a65788803b48d7d66ba159dec7c3555790303c52b3bc00a6cb7bda81bbc0bc9f

SHA512
37e7f835433f3a21040926ea2e034ee88fc4044a9a6bd8c2ad5554019b75306632c907232794d92199a68e06467f252d7858432849182fe821e1f52181ade645

Download Submit
memory/1140-19-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/1140-25-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1140-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2252-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2252-1-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download
memory/2252-9-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download
memory/2252-2-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/2252-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download