d8893a23cf0ebb0ed5e313dbfe30a152505222d2720d1725dce87b5e8bedc9bf

Analysis

max time kernel
148s
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
24/04/2024, 00:44

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General

Target

2024-04-24_6516d3a62ec4ee6d0f539e651376f34d_cryptolocker.exe
Size

47KB
MD5

6516d3a62ec4ee6d0f539e651376f34d
SHA1

abbacf0607d58f878de024e24a3e735362305a3a
SHA256

d8893a23cf0ebb0ed5e313dbfe30a152505222d2720d1725dce87b5e8bedc9bf
SHA512

923ab29aa15d191e59eb0f74e0678a98202ef3f120dfa4be10d80275ae49b9a3a6aefc941bae904119aab00a8eda0105ea0ac8f2cd4e4609f9e6eff6c991c928
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2Mo2p6:qmbhXDmjr5MOtEvwDpj5cDtKkQZQb

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3868-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000b000000023227-13.dat	CryptoLocker_rule2
behavioral2/memory/516-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3868-21-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/516-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/516-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3868-21-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/516-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/3868-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000b000000023227-13.dat	UPX
behavioral2/memory/516-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3868-21-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/516-27-0x0000000000500000-0x0000000000510000-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-04-24_6516d3a62ec4ee6d0f539e651376f34d_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
516	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 3868 wrote to memory of 516	3868	2024-04-24_6516d3a62ec4ee6d0f539e651376f34d_cryptolocker.exe	89
PID 3868 wrote to memory of 516	3868	2024-04-24_6516d3a62ec4ee6d0f539e651376f34d_cryptolocker.exe	89
PID 3868 wrote to memory of 516	3868	2024-04-24_6516d3a62ec4ee6d0f539e651376f34d_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-04-24_6516d3a62ec4ee6d0f539e651376f34d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-24_6516d3a62ec4ee6d0f539e651376f34d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3868
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:516

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=3808 --field-trial-handle=2264,i,15001568551143786084,90255922961447677,262144 --variations-seed-version /prefetch:8
1⤵
PID:2856

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
48KB

MD5
840b125c665b0ce2d7f909c297d91aac

SHA1
350fa62e53c184e93cdf3b0e494932153677e067

SHA256
fdc28a150078a5ac043ae25490eb7a590b29d6a64638962838378fbbb3622b83

SHA512
05a176f099db1fe1285f6346f776da24a55aeffff7b2b4b07f997466a017b060f51fc5a834268d755bf2b8beecffa591d03db276e71d61b3d10080feae0cee88

Download Submit
memory/516-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/516-19-0x0000000000510000-0x0000000000516000-memory.dmp

Filesize
24KB

Download
memory/516-20-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/516-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3868-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3868-1-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/3868-2-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/3868-3-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/3868-21-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download