e2539420cf55564d3261191852b14b42f2b093ece7caf06fb38c77c7c3ff3122

Analysis

max time kernel
147s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
02/05/2024, 22:22

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General

Target

2024-05-02_292e4ab6f4de8aa95eef6a39d2ecb73c_cryptolocker.exe
Size

38KB
MD5

292e4ab6f4de8aa95eef6a39d2ecb73c
SHA1

9fbe76a6c54529840fbe49da99dadce74c303686
SHA256

e2539420cf55564d3261191852b14b42f2b093ece7caf06fb38c77c7c3ff3122
SHA512

64ad111849d0da9d508d11e44143de1c145f68f28e9b97cd3b1bc14d746a264106c1e85c7b24294843d1331f1e2f578bdd56ca22dd343ee895edeef5d2214db9
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYv:qDdFJy3QMOtEvwDpjjWMl7T2

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/2808-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000d000000023b2e-13.dat	CryptoLocker_rule2
behavioral2/memory/2808-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4004-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4004-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/2808-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000d000000023b2e-13.dat	CryptoLocker_set1
behavioral2/memory/2808-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4004-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4004-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/2808-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000d000000023b2e-13.dat	UPX
behavioral2/memory/2808-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4004-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4004-27-0x0000000000500000-0x0000000000510000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3726321484-1950364574-433157660-1000\Control Panel\International\Geo\Nation	2024-05-02_292e4ab6f4de8aa95eef6a39d2ecb73c_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4004	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2808-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000d000000023b2e-13.dat	upx
behavioral2/memory/2808-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4004-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4004-27-0x0000000000500000-0x0000000000510000-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

description	pid	Process	procid_target
PID 2808 wrote to memory of 4004	2808	2024-05-02_292e4ab6f4de8aa95eef6a39d2ecb73c_cryptolocker.exe	83
PID 2808 wrote to memory of 4004	2808	2024-05-02_292e4ab6f4de8aa95eef6a39d2ecb73c_cryptolocker.exe	83
PID 2808 wrote to memory of 4004	2808	2024-05-02_292e4ab6f4de8aa95eef6a39d2ecb73c_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-02_292e4ab6f4de8aa95eef6a39d2ecb73c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-02_292e4ab6f4de8aa95eef6a39d2ecb73c_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2808
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4004

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

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
605251d85f907866bdc68a9f80a4fec5

SHA1
24c96f438645f9187adc18ad32dad5541e0c9791

SHA256
cc4e1f97e13957f80a8c4a7ba745f1a18d679fa3ce730d46729ea453816c6857

SHA512
4cebda0be9a900051c13a87c82e27dfbbe7ba177228edcc36605f6288a16a3dd67a6fe9238833d9a82c34b02b48ec4c98bb298a9e6f1fea75bfca3498c90ed5c

Download Submit
memory/2808-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2808-1-0x0000000000840000-0x0000000000846000-memory.dmp

Filesize
24KB

Download
memory/2808-2-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/2808-9-0x0000000000840000-0x0000000000846000-memory.dmp

Filesize
24KB

Download
memory/2808-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4004-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4004-26-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4004-20-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/4004-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download