018330396582af31dbfafa98f33e9d5e17875442b51235d5cad2590b504b43a5

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
30/05/2024, 18:47

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General

Target

2024-05-30_078bdb3910cf1d2ace1cd2c4d13556da_cryptolocker.exe
Size

40KB
MD5

078bdb3910cf1d2ace1cd2c4d13556da
SHA1

37155c221bd97a58db8f4e6242b8a784dd26398d
SHA256

018330396582af31dbfafa98f33e9d5e17875442b51235d5cad2590b504b43a5
SHA512

9ada803428befa2735dafe1b3f2262eb885dc777cc10c5e96aeb9cd320cb80d04a7f69cd4c494fb6e4f02a7f3dcff5ca9d232beb064aa1a9087bcbab69fea7ed
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYfU:qDdFJy3QMOtEvwDpjjWMl7TYU

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3984-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000900000002351c-13.dat	CryptoLocker_rule2
behavioral2/memory/3984-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3232-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3984-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000900000002351c-13.dat	CryptoLocker_set1
behavioral2/memory/3984-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3232-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3984-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000900000002351c-13.dat	UPX
behavioral2/memory/3984-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3232-27-0x0000000000500000-0x0000000000510000-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	2024-05-30_078bdb3910cf1d2ace1cd2c4d13556da_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3232	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3984-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000900000002351c-13.dat	upx
behavioral2/memory/3984-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3232-27-0x0000000000500000-0x0000000000510000-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 3984 wrote to memory of 3232	3984	2024-05-30_078bdb3910cf1d2ace1cd2c4d13556da_cryptolocker.exe	91
PID 3984 wrote to memory of 3232	3984	2024-05-30_078bdb3910cf1d2ace1cd2c4d13556da_cryptolocker.exe	91
PID 3984 wrote to memory of 3232	3984	2024-05-30_078bdb3910cf1d2ace1cd2c4d13556da_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-05-30_078bdb3910cf1d2ace1cd2c4d13556da_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-30_078bdb3910cf1d2ace1cd2c4d13556da_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3984
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3232

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=4176,i,5711962389779687290,1245653010537220991,262144 --variations-seed-version --mojo-platform-channel-handle=4100 /prefetch:8
1⤵
PID:2956

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
40KB

MD5
f47981d811ba5801658b743f6ba07d11

SHA1
9b752421f1391f817e18543b271f7e1543651c5f

SHA256
fd0b3f2a54007aec4de9e029783b9065e248ff2c677ef97757a3e22a3f20cafd

SHA512
aab8635451335e613f41eace36ad3294d80e806b9d92ca91e8db7115e80e995235cee8307620fa9eea0aa93f0b5992c3508311cfc7d9f21ade6dda2995426107

Download Submit
memory/3232-20-0x0000000002000000-0x0000000002006000-memory.dmp

Filesize
24KB

Download
memory/3232-26-0x0000000001F50000-0x0000000001F56000-memory.dmp

Filesize
24KB

Download
memory/3232-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3984-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3984-1-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download
memory/3984-2-0x0000000002090000-0x0000000002096000-memory.dmp

Filesize
24KB

Download
memory/3984-9-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download
memory/3984-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download