61a04edd1ff234f38a1bf9b78e1da63de8feba59da2e0c0e3cf92bb1263ee1f0

Analysis

max time kernel
150s
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
12/03/2024, 12:39

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General

Target

2024-03-12_85970c1b26796bedc4b15dd381a1c24c_cryptolocker.exe
Size

67KB
MD5

85970c1b26796bedc4b15dd381a1c24c
SHA1

9d18af4372c8bfe94d9232fdf9596460fe11a7db
SHA256

61a04edd1ff234f38a1bf9b78e1da63de8feba59da2e0c0e3cf92bb1263ee1f0
SHA512

d6092b35be42edc9c46eb18690de6f894e9852f183175faeab89d05a5053c8ae4a0e751593e24299792caffa8d20924d4b90dde99046edc5efe61412fe968f6d
SSDEEP

768:nj+WxauFzs2yhP7GkhO2tOOtEvwDpje9+4U9HueDgaRWDCSMzTZ:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTZ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4952-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c0000000226fd-13.dat	CryptoLocker_rule2
behavioral2/memory/4952-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1536-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/4952-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1536-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4952-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000c0000000226fd-13.dat	UPX
behavioral2/memory/4952-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1536-26-0x0000000000500000-0x0000000000510000-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	2024-03-12_85970c1b26796bedc4b15dd381a1c24c_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1536	misid.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4952-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000c0000000226fd-13.dat	upx
behavioral2/memory/4952-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1536-26-0x0000000000500000-0x0000000000510000-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 4952 wrote to memory of 1536	4952	2024-03-12_85970c1b26796bedc4b15dd381a1c24c_cryptolocker.exe	91
PID 4952 wrote to memory of 1536	4952	2024-03-12_85970c1b26796bedc4b15dd381a1c24c_cryptolocker.exe	91
PID 4952 wrote to memory of 1536	4952	2024-03-12_85970c1b26796bedc4b15dd381a1c24c_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-03-12_85970c1b26796bedc4b15dd381a1c24c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-12_85970c1b26796bedc4b15dd381a1c24c_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4952
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:1536

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

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Downloads

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

Filesize
67KB

MD5
e9896667158cd3439cfc47c7be9540c7

SHA1
05093e3a204979508434d862c245cf29410997cf

SHA256
764d88a0939b0f158dee33ce9bcff5cfa775e47ce0a6cdce91b987b68d16a210

SHA512
fc22d822208fc781d74648c4a582e3fecb2c2f7ce2b53512509c0f5650f853321ffa42aa70722740d78f80f63cc2da27cafbad0d595e424e69a90c86117be174

Download Submit
memory/1536-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1536-25-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1536-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4952-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4952-1-0x0000000002280000-0x0000000002286000-memory.dmp

Filesize
24KB

Download
memory/4952-2-0x0000000002280000-0x0000000002286000-memory.dmp

Filesize
24KB

Download
memory/4952-3-0x00000000021A0000-0x00000000021A6000-memory.dmp

Filesize
24KB

Download
memory/4952-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download