9748b5fc6cc9e73ba4d4923f3878a4d1d857454ac4b7240add41709a249e81fe

General

Target

2024-05-23_73e2522bc10147eb0b46ab145c1ac281_cryptolocker.exe
Size

40KB
MD5

73e2522bc10147eb0b46ab145c1ac281
SHA1

257792256c6eb77af6ba0e91cc7d9bdfc9bdffa3
SHA256

9748b5fc6cc9e73ba4d4923f3878a4d1d857454ac4b7240add41709a249e81fe
SHA512

9538182be6fb011f04f5583b3c85d8f9bffed606c054687946f63e85fc159ef8bdc912d5784550db1cc663f347f84d785a239c966d6b5e4d6bef72659d854ddc
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaBIn:qDdFJy3QMOtEvwDpjjWMl7Tdc

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4716-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/4716-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4160-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4160-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4716-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/4716-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4160-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4160-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4716-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/4716-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4160-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4160-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-23_73e2522bc10147eb0b46ab145c1ac281_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	2024-05-23_73e2522bc10147eb0b46ab145c1ac281_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

4160 asih.exe

pid	process
4160	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4716-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/4716-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4160-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4160-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-23_73e2522bc10147eb0b46ab145c1ac281_cryptolocker.exe

description	pid	process	target process
PID 4716 wrote to memory of 4160	4716	2024-05-23_73e2522bc10147eb0b46ab145c1ac281_cryptolocker.exe	asih.exe
PID 4716 wrote to memory of 4160	4716	2024-05-23_73e2522bc10147eb0b46ab145c1ac281_cryptolocker.exe	asih.exe
PID 4716 wrote to memory of 4160	4716	2024-05-23_73e2522bc10147eb0b46ab145c1ac281_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_73e2522bc10147eb0b46ab145c1ac281_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_73e2522bc10147eb0b46ab145c1ac281_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4716

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:4160

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=4036,i,10373433614523925616,13586256558317053467,262144 --variations-seed-version --mojo-platform-channel-handle=1960 /prefetch:8
1⤵
PID:1836

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
40KB

MD5
2a9419b275218f593ed4c03cd41fb4c4

SHA1
6ee5f26841bcd4c216588a009bd77a8daee5a1d8

SHA256
b7470d8b5966bab725688833154818bbab8b68381d427cf5cf499c30912898c2

SHA512
e230e29528823c272fbddad3da172a55204bdae138c1e58522dadc73f8a03a3cf6f48ead04bd7c2af128278e80067b6c91d204b44e67b3e247d817f25fee0a7a

Download Submit
memory/4160-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4160-20-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/4160-26-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/4160-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4716-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4716-1-0x0000000000570000-0x0000000000576000-memory.dmp

Filesize
24KB

Download
memory/4716-9-0x0000000000570000-0x0000000000576000-memory.dmp

Filesize
24KB

Download
memory/4716-2-0x0000000002000000-0x0000000002006000-memory.dmp

Filesize
24KB

Download
memory/4716-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads