ca049f65bd35375f5219be8d64ffe83ec8560e921631b30c032388e057460925

Analysis

max time kernel
142s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
10/04/2024, 16:34

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General

Target

2024-04-10_3769be4f198e9b264591b945b4d87be5_cryptolocker.exe
Size

117KB
MD5

3769be4f198e9b264591b945b4d87be5
SHA1

7edf4eb2cfe39d72ab294387cbf1d5c185e8e948
SHA256

ca049f65bd35375f5219be8d64ffe83ec8560e921631b30c032388e057460925
SHA512

7deecaf5a2512c7e7e31308810846a8b5f5b262d373d1cf56abae33324a1db97e5e3dc3581b6a3c183909bceb4ced10a6f2b22da997c28bfdf48951dedb4f33d
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwNgpYICSC:z6a+CdOOtEvwDpjczl

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2384-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023251-13.dat	CryptoLocker_rule2
behavioral2/memory/2384-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4120-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2384-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023251-13.dat	CryptoLocker_set1
behavioral2/memory/2384-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4120-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2384-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023251-13.dat	UPX
behavioral2/memory/2384-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4120-26-0x0000000000500000-0x0000000000510000-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	2024-04-10_3769be4f198e9b264591b945b4d87be5_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4120	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2384-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000023251-13.dat	upx
behavioral2/memory/2384-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4120-26-0x0000000000500000-0x0000000000510000-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 2384 wrote to memory of 4120	2384	2024-04-10_3769be4f198e9b264591b945b4d87be5_cryptolocker.exe	92
PID 2384 wrote to memory of 4120	2384	2024-04-10_3769be4f198e9b264591b945b4d87be5_cryptolocker.exe	92
PID 2384 wrote to memory of 4120	2384	2024-04-10_3769be4f198e9b264591b945b4d87be5_cryptolocker.exe	92

C:\Users\Admin\AppData\Local\Temp\2024-04-10_3769be4f198e9b264591b945b4d87be5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-10_3769be4f198e9b264591b945b4d87be5_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2384
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4120

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=1340 --field-trial-handle=2236,i,5367110156796017614,12594004256180761011,262144 --variations-seed-version /prefetch:8
1⤵
PID:2936

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
117KB

MD5
c891f061b8964639e74ef73e4289e2ed

SHA1
8077a0b142b28541a23ea6ed7bbb1f1489d92c41

SHA256
5f23308cd65cbb4799a65754d9e9e04d5e3fe0125020878b946f739741274bbe

SHA512
281d1d37422f382ecebf531414dfa3c195def4103a874c9191cc91f9f10d1088ef0c2d9ce2ba3044d5c4541123a7ac1ffe2ba5f6f0a4d5806c035edabb532a6b

Download Submit
memory/2384-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2384-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/2384-2-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/2384-3-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/2384-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4120-20-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4120-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4120-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download