b56f22dae2130ad94df87c76e461f456106aa0faa462e8edf2c4188905001550

General

Target

2024-04-23_d06602bdd08176ca8443d0fc72371b47_cryptolocker.exe
Size

102KB
MD5

d06602bdd08176ca8443d0fc72371b47
SHA1

0fbedb8c1e5fd31b3317037a4658c6bd5df4c15b
SHA256

b56f22dae2130ad94df87c76e461f456106aa0faa462e8edf2c4188905001550
SHA512

d246b7b64842b57d3e17b6d47b1af10281062f5a62dfa87de0ad257002bc37ac45df66c362f3b55758dacbd7a2065317a938d98e9f509ed2b077480f9e7893bc
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgpwqWsviPeBcM:AnBdOOtEvwDpj6zG

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/5080-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000b000000023219-13.dat	CryptoLocker_rule2
behavioral2/memory/5080-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1108-19-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1108-28-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/5080-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000b000000023219-13.dat	CryptoLocker_set1
behavioral2/memory/5080-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1108-19-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1108-28-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/5080-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000b000000023219-13.dat	UPX
behavioral2/memory/5080-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/1108-19-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/1108-28-0x0000000000500000-0x000000000050F000-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	2024-04-23_d06602bdd08176ca8443d0fc72371b47_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1108	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/5080-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000b000000023219-13.dat	upx
behavioral2/memory/5080-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/1108-19-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/1108-28-0x0000000000500000-0x000000000050F000-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 5080 wrote to memory of 1108	5080	2024-04-23_d06602bdd08176ca8443d0fc72371b47_cryptolocker.exe	90
PID 5080 wrote to memory of 1108	5080	2024-04-23_d06602bdd08176ca8443d0fc72371b47_cryptolocker.exe	90
PID 5080 wrote to memory of 1108	5080	2024-04-23_d06602bdd08176ca8443d0fc72371b47_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-04-23_d06602bdd08176ca8443d0fc72371b47_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-23_d06602bdd08176ca8443d0fc72371b47_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5080
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1108

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=1028 --field-trial-handle=2252,i,16504368816373493055,9578615028378602855,262144 --variations-seed-version /prefetch:8
1⤵
PID:4776

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
102KB

MD5
02139e009d7949f410712a6fb14bea4f

SHA1
b7706e6fbf72a323788f785fcfef254f2e1e1ae1

SHA256
765911cdca571ff4918ed2d9a2c12ed7f81ef131e8fc16efe8824a719020faa8

SHA512
499aefe974f0b5b3478eeace0c1713058d38d803780c0e0aacf07b8704dd1be2edd29056f255faea71f6521193b5522499a937dc66f75002db8993ffb38cb96a

Download Submit
memory/1108-19-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1108-20-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/1108-22-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/1108-28-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/5080-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/5080-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/5080-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/5080-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/5080-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download

Analysis

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