eb583964d30600f1821cf30bc2ccb76c25911a28c859927093b7b5f71a39b316

General

Target

2024-06-09_f7f79b9f6a749f4237ae579cfa096f62_cryptolocker.exe
Size

40KB
MD5

f7f79b9f6a749f4237ae579cfa096f62
SHA1

523f22fa98d466dadb105137c8385f9a3c587a33
SHA256

eb583964d30600f1821cf30bc2ccb76c25911a28c859927093b7b5f71a39b316
SHA512

b518213dee268a9df73cf8245ca1bf7139fb6133995c48d0c746ff949e48ed4917579ff61642d6f2e7069bcb6d0fc15f3ce2b01386485db9147dc14005380f06
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY/t:qDdFJy3QMOtEvwDpjjWMl7TQ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4436-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023260-13.dat	CryptoLocker_rule2
behavioral2/memory/1884-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4436-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1884-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/4436-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023260-13.dat	CryptoLocker_set1
behavioral2/memory/1884-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4436-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1884-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4436-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023260-13.dat	UPX
behavioral2/memory/1884-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4436-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1884-28-0x0000000000500000-0x0000000000510000-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-06-09_f7f79b9f6a749f4237ae579cfa096f62_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1884	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4436-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000023260-13.dat	upx
behavioral2/memory/1884-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4436-27-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1884-28-0x0000000000500000-0x0000000000510000-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 4436 wrote to memory of 1884	4436	2024-06-09_f7f79b9f6a749f4237ae579cfa096f62_cryptolocker.exe	91
PID 4436 wrote to memory of 1884	4436	2024-06-09_f7f79b9f6a749f4237ae579cfa096f62_cryptolocker.exe	91
PID 4436 wrote to memory of 1884	4436	2024-06-09_f7f79b9f6a749f4237ae579cfa096f62_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-06-09_f7f79b9f6a749f4237ae579cfa096f62_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-09_f7f79b9f6a749f4237ae579cfa096f62_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4436
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1884

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=4440 --field-trial-handle=2292,i,2103142837140538807,15881446839139365070,262144 --variations-seed-version /prefetch:8
1⤵
PID:4372

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
40KB

MD5
b57f310a717ebee0e4a0cc042e912a32

SHA1
ae8caf5834717fcaa70d96527123ff0e36971335

SHA256
8d97160f142f8440bfb5ca405bcfc60230e4042d33068ce3ff85b9572be5bf22

SHA512
d8cc3a444cf7b64702f4407f60eb65fe624904ffeb666187096004a4c43cb65052c80b0d9d6b03ea6ed620cfd5b4d7ff7b6c2ccfa4a4696e6126d1c642306da4

Download Submit
memory/1884-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1884-19-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/1884-20-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/1884-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4436-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4436-1-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/4436-2-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/4436-3-0x0000000002040000-0x0000000002046000-memory.dmp

Filesize
24KB

Download
memory/4436-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

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