fc803b107ad9dacaf781f5567c64c99142c2a4d44ee3bbc23d771447de6809ed

Analysis

max time kernel
146s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
09/04/2024, 03:27

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General

Target

2024-04-09_0aa234801955fe89cb4312bb237fbec5_cryptolocker.exe
Size

45KB
MD5

0aa234801955fe89cb4312bb237fbec5
SHA1

ffea535af304da243d258b52da33e3b07de390ea
SHA256

fc803b107ad9dacaf781f5567c64c99142c2a4d44ee3bbc23d771447de6809ed
SHA512

814d702e7a889a4a8f592dd5f28cd079365a2828146cac17c74cadbeedf9b3a46d2e8a45d148249e61d30df4dcb93ea331d77bd73b4db8c5fac354a909caf854
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2MoLn:qmbhXDmjr5MOtEvwDpj5cDtKkQZQ9

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4916-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023251-13.dat	CryptoLocker_rule2
behavioral2/memory/4916-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1764-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/4916-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1764-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4916-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023251-13.dat	UPX
behavioral2/memory/4916-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1764-26-0x0000000000500000-0x0000000000510000-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	2024-04-09_0aa234801955fe89cb4312bb237fbec5_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1764	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 4916 wrote to memory of 1764	4916	2024-04-09_0aa234801955fe89cb4312bb237fbec5_cryptolocker.exe	96
PID 4916 wrote to memory of 1764	4916	2024-04-09_0aa234801955fe89cb4312bb237fbec5_cryptolocker.exe	96
PID 4916 wrote to memory of 1764	4916	2024-04-09_0aa234801955fe89cb4312bb237fbec5_cryptolocker.exe	96

C:\Users\Admin\AppData\Local\Temp\2024-04-09_0aa234801955fe89cb4312bb237fbec5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-09_0aa234801955fe89cb4312bb237fbec5_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4916
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1764

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=2756 --field-trial-handle=2236,i,5367110156796017614,12594004256180761011,262144 --variations-seed-version /prefetch:8
1⤵
PID:1880

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
46KB

MD5
7ac0aedf06b1ec68872b7dbe8799affa

SHA1
da7b7f43660e53ae3bb5d72997d6230e8288b380

SHA256
6082c2e7358f3628ee5ae6e5d5e234340ed2d2a0a1cc38b780266e1ba8667b56

SHA512
8168d41a9f13bb65cf6211c01342d7c27da1a00011b156eebf618d7364cd5371a3ecb6c72dfb26fd5c09b3d8bd484da71b8789115718a03372d57fbce4235139

Download Submit
memory/1764-18-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1764-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1764-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4916-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4916-1-0x0000000000670000-0x0000000000676000-memory.dmp

Filesize
24KB

Download
memory/4916-2-0x0000000000670000-0x0000000000676000-memory.dmp

Filesize
24KB

Download
memory/4916-3-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/4916-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download