45549e88ede5114340b538d6f46817a86d1ff99ef968ee36129c411d80c15477

Analysis

max time kernel
151s
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
14/03/2024, 15:38

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General

Target

2024-03-14_654946c5af63a955cbb4836fb4b01e90_cryptolocker.exe
Size

86KB
MD5

654946c5af63a955cbb4836fb4b01e90
SHA1

760bc71622ea30d6437dd7f0c1d4bf56bfb7b085
SHA256

45549e88ede5114340b538d6f46817a86d1ff99ef968ee36129c411d80c15477
SHA512

cead2aafaa1d90db81b76b85ad2579b65063416ecf64bcdc9d69f8ff2cb4da5c6ece0115617257831996d749442a54e67e617608ec3c617aa0e7d9a0805779cf
SSDEEP

768:qkmnjFom/kLyMro2GtOOtEvwDpjeY10Y/YMsvlMdwPK80GQuchoIgtIgj6J:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgi

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1888-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023252-13.dat	CryptoLocker_rule2
behavioral2/memory/1888-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3784-25-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1888-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023252-13.dat	CryptoLocker_set1
behavioral2/memory/1888-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3784-25-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1888-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x0008000000023252-13.dat	UPX
behavioral2/memory/1888-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/3784-25-0x0000000000500000-0x000000000050F000-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	2024-03-14_654946c5af63a955cbb4836fb4b01e90_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3784	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1888-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x0008000000023252-13.dat	upx
behavioral2/memory/1888-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/3784-25-0x0000000000500000-0x000000000050F000-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 1888 wrote to memory of 3784	1888	2024-03-14_654946c5af63a955cbb4836fb4b01e90_cryptolocker.exe	99
PID 1888 wrote to memory of 3784	1888	2024-03-14_654946c5af63a955cbb4836fb4b01e90_cryptolocker.exe	99
PID 1888 wrote to memory of 3784	1888	2024-03-14_654946c5af63a955cbb4836fb4b01e90_cryptolocker.exe	99

C:\Users\Admin\AppData\Local\Temp\2024-03-14_654946c5af63a955cbb4836fb4b01e90_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-14_654946c5af63a955cbb4836fb4b01e90_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1888
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3784

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:1896

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
86KB

MD5
dbad51db5bbecd3349239559d933db23

SHA1
d1cc54d67e95adec68878f5d268526c3bd485757

SHA256
d82336b71e53e6838f26e6b45f8d5ef6fcfafbf05341f278409404a3c7a54829

SHA512
bb5ec08d453448ae50328b288e7ddc99537551f853498354eaf3771c92a46b34ba2df8e4a366682b53f41874d211c11c50445934d43cd39f704585536bb1467c

Download Submit
memory/1888-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1888-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1888-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1888-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/1888-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3784-19-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/3784-25-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3784-26-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download