ef8abe2b5c566deeed78b250af7bb0e8df12db85efb4cd175b4e651a41b0c8d7

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
28/03/2024, 04:56

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General

Target

2024-03-28_d97ac71c448ae1a3e74ea03516c9cdb8_cryptolocker.exe
Size

40KB
MD5

d97ac71c448ae1a3e74ea03516c9cdb8
SHA1

bc0060ea9b1a32646896b4cffffbe0a52c04cb15
SHA256

ef8abe2b5c566deeed78b250af7bb0e8df12db85efb4cd175b4e651a41b0c8d7
SHA512

eea231afe40c9364ca91b3df56c81562f2f18581ea769fa8423be82babb867ad006c10bf2bfe75fdaa57cc9bcca844f9e878aeb8cdaa582be5cf6a2364b4293d
SSDEEP

768:XS5nQJ24LR1bytOOtEvwDpj66BLbjG9RzhwaO4t:i5nkFGMOtEvwDpjR+TD

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3752-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002325a-13.dat	CryptoLocker_rule2
behavioral2/memory/1772-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3752-22-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1772-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/1772-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3752-22-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1772-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

Detects executables built or packed with MPress PE compressor 5 IoCs

resource	yara_rule
behavioral2/memory/3752-0-0x0000000000500000-0x000000000050F000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/files/0x000800000002325a-13.dat	INDICATOR_EXE_Packed_MPress
behavioral2/memory/1772-17-0x0000000000500000-0x000000000050F000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/memory/3752-22-0x0000000000500000-0x000000000050F000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/memory/1772-27-0x0000000000500000-0x000000000050F000-memory.dmp	INDICATOR_EXE_Packed_MPress

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	2024-03-28_d97ac71c448ae1a3e74ea03516c9cdb8_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1772	misid.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 3752 wrote to memory of 1772	3752	2024-03-28_d97ac71c448ae1a3e74ea03516c9cdb8_cryptolocker.exe	95
PID 3752 wrote to memory of 1772	3752	2024-03-28_d97ac71c448ae1a3e74ea03516c9cdb8_cryptolocker.exe	95
PID 3752 wrote to memory of 1772	3752	2024-03-28_d97ac71c448ae1a3e74ea03516c9cdb8_cryptolocker.exe	95

C:\Users\Admin\AppData\Local\Temp\2024-03-28_d97ac71c448ae1a3e74ea03516c9cdb8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-28_d97ac71c448ae1a3e74ea03516c9cdb8_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3752
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:1772

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=4036 --field-trial-handle=2676,i,447940133669489189,1353734109898858672,262144 --variations-seed-version /prefetch:8
1⤵
PID:400

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\misid.exe

Filesize
40KB

MD5
d44c5fb19d17def8213ec97396e5c1ec

SHA1
d71bb0c1ece6b70f9fe4f309d5758f9aeb60964d

SHA256
cb0ab1ad9786421bcbd3eb8b01ea712eeaca6c7acb457a2c1100467a1ffe56fa

SHA512
c37689f7153db06d96c4658d79808e0dfc311a128f262ab1c84c183c81ff8ba8593315c96f99369ddf27f542910e97baa25663ec16b5e1dd4e8b3d66b6ecf502

Download Submit
memory/1772-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1772-19-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1772-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1772-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3752-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3752-1-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/3752-2-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/3752-3-0x00000000021B0000-0x00000000021B6000-memory.dmp

Filesize
24KB

Download
memory/3752-22-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download