cecc1a638ef9b47ebcda916f1a30f5f874bbd50df963b8ed3eb0788dfa407894

Analysis

max time kernel
147s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
27-03-2024 04:26

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General

Target

2024-03-27_56f10a4e6a9436d39b3d24bc441161f2_cryptolocker.exe
Size

80KB
MD5

56f10a4e6a9436d39b3d24bc441161f2
SHA1

0e4496588b650b8defe55b2fc6f5979140f99893
SHA256

cecc1a638ef9b47ebcda916f1a30f5f874bbd50df963b8ed3eb0788dfa407894
SHA512

ca5daa7486e5097a8b2771deb8c661fb17595e67fe50ea67120f72c90041125413f7890909fd4f5974fa585f207672887ff42801ce1c8879291f86b83c992c7b
SSDEEP

1536:zj+soPSMOtEvwDpj4ktBl01hJ0tq1kySeh:zCsanOtEvwDpju

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3112-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00080000000231f3-13.dat	CryptoLocker_rule2
behavioral2/memory/3112-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1216-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3112-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00080000000231f3-13.dat	CryptoLocker_set1
behavioral2/memory/3112-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1216-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3112-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x00080000000231f3-13.dat	UPX
behavioral2/memory/3112-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1216-26-0x0000000000500000-0x0000000000510000-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-1-5-21-513485977-2495024337-1260977654-1000\Control Panel\International\Geo\Nation	2024-03-27_56f10a4e6a9436d39b3d24bc441161f2_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1216	misid.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3112-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x00080000000231f3-13.dat	upx
behavioral2/memory/3112-19-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1216-26-0x0000000000500000-0x0000000000510000-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 3112 wrote to memory of 1216	3112	2024-03-27_56f10a4e6a9436d39b3d24bc441161f2_cryptolocker.exe	88
PID 3112 wrote to memory of 1216	3112	2024-03-27_56f10a4e6a9436d39b3d24bc441161f2_cryptolocker.exe	88
PID 3112 wrote to memory of 1216	3112	2024-03-27_56f10a4e6a9436d39b3d24bc441161f2_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-03-27_56f10a4e6a9436d39b3d24bc441161f2_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-27_56f10a4e6a9436d39b3d24bc441161f2_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3112
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:1216

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\misid.exe

Filesize
81KB

MD5
cdbb8d7c0f55c1dc25fcaad92e8cd3cc

SHA1
d69fa02149c366ed4f0c96fc395af15cdd717461

SHA256
64bbac3fb76ec9223449301e9a28a8b770bbef1990c9024e653389889413f993

SHA512
7ca04275686d0c69f6f54ec5a5b6a27f358862f097d83e092e9512dc9707a5e29dfbc24dcb9e3601dcb2d1fa274ed8da3aee5312042fb8e21687c68f10c2982d

Download Submit
memory/1216-20-0x0000000000630000-0x0000000000636000-memory.dmp

Filesize
24KB

Download
memory/1216-18-0x0000000000760000-0x0000000000766000-memory.dmp

Filesize
24KB

Download
memory/1216-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3112-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3112-1-0x0000000000570000-0x0000000000576000-memory.dmp

Filesize
24KB

Download
memory/3112-2-0x0000000000570000-0x0000000000576000-memory.dmp

Filesize
24KB

Download
memory/3112-3-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/3112-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download