876d430838801ab597b26249a1b5f81d8409205b9282cf590caa514f75e22b36

General

Target

2024-05-11_cdeca6234d9ea668c9fdc2b936782afb_cryptolocker.exe
Size

39KB
MD5

cdeca6234d9ea668c9fdc2b936782afb
SHA1

25363aa8fc19b8f9969de8c47807276b68be7e9b
SHA256

876d430838801ab597b26249a1b5f81d8409205b9282cf590caa514f75e22b36
SHA512

b8f462cd95054352046b9d27998d23e7a4d680034819de5506f279a1ded0f6882d5f9f579695deebe85c8d3a9708cbc6a350bb30f5db62b11ea91862ce2572b5
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY9V:qDdFJy3QMOtEvwDpjjWMl7TO

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4196-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0009000000023553-13.dat	CryptoLocker_rule2
behavioral2/memory/4196-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/544-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/544-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/4196-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0009000000023553-13.dat	CryptoLocker_set1
behavioral2/memory/4196-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/544-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/544-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4196-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0009000000023553-13.dat	UPX
behavioral2/memory/4196-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/544-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/544-28-0x0000000000500000-0x0000000000510000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	2024-05-11_cdeca6234d9ea668c9fdc2b936782afb_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
544	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4196-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0009000000023553-13.dat	upx
behavioral2/memory/4196-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/544-19-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/544-28-0x0000000000500000-0x0000000000510000-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

description	pid	Process	procid_target
PID 4196 wrote to memory of 544	4196	2024-05-11_cdeca6234d9ea668c9fdc2b936782afb_cryptolocker.exe	89
PID 4196 wrote to memory of 544	4196	2024-05-11_cdeca6234d9ea668c9fdc2b936782afb_cryptolocker.exe	89
PID 4196 wrote to memory of 544	4196	2024-05-11_cdeca6234d9ea668c9fdc2b936782afb_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-05-11_cdeca6234d9ea668c9fdc2b936782afb_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-11_cdeca6234d9ea668c9fdc2b936782afb_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4196
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:544

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=4436,i,7012731823941922179,12386606396608877869,262144 --variations-seed-version --mojo-platform-channel-handle=4020 /prefetch:8
1⤵
PID:4156

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

Replay Monitor

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Downloads

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

Filesize
39KB

MD5
a1043256478c7b92f5ce35031ebfb906

SHA1
fa8c64221d208538ea1aa95cbf176dc45a5180c8

SHA256
182a618d7bf92814c3f10c73400451ae89b3929e7bd28596f28b324fd8208393

SHA512
826e2991edaa2fc99e8e23165cda209ca1f0deebe2e00e8efd605741b88d6d6877e2c48b060f6801c36277a0a7bc0717c98981f8e263426388b0a57413c78738

Download Submit
memory/544-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/544-27-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/544-21-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/544-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4196-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4196-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4196-2-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/4196-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4196-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

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