be72a30b42bb3cb1c5f8c4512530c0f64aa5bb2826d5219e84c6137d6c6dd521

General

Target

2024-05-22_ea4f0041cefd4976bd564a79105aab73_cryptolocker.exe
Size

40KB
MD5

ea4f0041cefd4976bd564a79105aab73
SHA1

25da0d5574e571423cbd7994607d8336d6accdf6
SHA256

be72a30b42bb3cb1c5f8c4512530c0f64aa5bb2826d5219e84c6137d6c6dd521
SHA512

90cfea2f628d150cae1bf0e8f0e330365b82cdf282061ef1bd5840281fccde2b2f44989eb1662018aa81c2d871e53a4a22a642a71dbe4923ee19c134325d11dd
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaB0gi:qDdFJy3QMOtEvwDpjjWMl7TdCgi

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4504-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/3724-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4504-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3724-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4504-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/3724-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4504-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3724-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4504-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/3724-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4504-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3724-28-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-22_ea4f0041cefd4976bd564a79105aab73_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	2024-05-22_ea4f0041cefd4976bd564a79105aab73_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3724 asih.exe

pid	process
3724	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4504-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/3724-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4504-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3724-28-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-22_ea4f0041cefd4976bd564a79105aab73_cryptolocker.exe

description	pid	process	target process
PID 4504 wrote to memory of 3724	4504	2024-05-22_ea4f0041cefd4976bd564a79105aab73_cryptolocker.exe	asih.exe
PID 4504 wrote to memory of 3724	4504	2024-05-22_ea4f0041cefd4976bd564a79105aab73_cryptolocker.exe	asih.exe
PID 4504 wrote to memory of 3724	4504	2024-05-22_ea4f0041cefd4976bd564a79105aab73_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_ea4f0041cefd4976bd564a79105aab73_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_ea4f0041cefd4976bd564a79105aab73_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4504

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:3724

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=4212,i,6576818814118437872,11004518367271063231,262144 --variations-seed-version --mojo-platform-channel-handle=4132 /prefetch:8
1⤵
PID:2444

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
40KB

MD5
63eb628120e5b6b3a2eeefa884e34bce

SHA1
eb59b504639461960354631f001281fd931b0755

SHA256
48bcad6e146c9086ef3c2de726b066b3dea9566f2287ad9462583ec1c0d8a3ed

SHA512
1f3656bd27e645967615b77ed805ff6ed92498639778203f44da41507a569b14bac99056c442884c8eaf492b4a2b2434d220343ad3f2422cb3531f81bf91a2a6

Download Submit
memory/3724-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3724-27-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/3724-21-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/3724-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4504-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4504-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/4504-2-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/4504-3-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/4504-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads