333d2fb5eb2810ccfcc10b1b525b306826390252240ea1d3f10963802da8b568

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
26/01/2024, 01:37

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General

Target

2024-01-26_775cabcc33f7844ad5305836ba4b874d_cryptolocker.exe
Size

85KB
MD5

775cabcc33f7844ad5305836ba4b874d
SHA1

e654a7a2fc954c9f4df8f51fd82eb97c71c9832b
SHA256

333d2fb5eb2810ccfcc10b1b525b306826390252240ea1d3f10963802da8b568
SHA512

218301cd196cf32e2e2050009d7db11f3c72d4c198d68bcee18afb24cdf1098be820e3694c25fb144a71f391e4a93ce72b3aad112ab91366e53ca308f24a2752
SSDEEP

768:qkmnjFom/kLyMro2GtOOtEvwDpjeY10Y/YMsvlMdwPK80GQuchoIgtISb:qkmnpomddpMOtEvwDpjJGYQbN/PKwMg9

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3740-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023222-13.dat	CryptoLocker_rule2
behavioral2/memory/3740-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1200-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3740-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023222-13.dat	CryptoLocker_set1
behavioral2/memory/3740-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1200-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3740-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x0007000000023222-13.dat	UPX
behavioral2/memory/3740-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/1200-26-0x0000000000500000-0x000000000050F000-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-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation	2024-01-26_775cabcc33f7844ad5305836ba4b874d_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1200	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3740-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x0007000000023222-13.dat	upx
behavioral2/memory/3740-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/1200-26-0x0000000000500000-0x000000000050F000-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 3740 wrote to memory of 1200	3740	2024-01-26_775cabcc33f7844ad5305836ba4b874d_cryptolocker.exe	61
PID 3740 wrote to memory of 1200	3740	2024-01-26_775cabcc33f7844ad5305836ba4b874d_cryptolocker.exe	61
PID 3740 wrote to memory of 1200	3740	2024-01-26_775cabcc33f7844ad5305836ba4b874d_cryptolocker.exe	61

C:\Users\Admin\AppData\Local\Temp\2024-01-26_775cabcc33f7844ad5305836ba4b874d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-26_775cabcc33f7844ad5305836ba4b874d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3740
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1200

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
85KB

MD5
72d9a980c55b54eaa1d217ebb1f4e3dc

SHA1
ed4b9aad092067c76a9b112d6201334c72982e1e

SHA256
a153ae61e3aebb7b526b1c8d24a6e2ce1d4f17f3768b1bfe6da90502bcd7e197

SHA512
84adbca59477d613f9cd690202c6ac83b3200fedebac904631e7e3421248d0993934d812456de48ab3ad23c9ac508baa3084aa024dfc9952de16bfe1f93ae6ee

Download Submit
memory/1200-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1200-25-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1200-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3740-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3740-2-0x00000000005F0000-0x00000000005F6000-memory.dmp

Filesize
24KB

Download
memory/3740-3-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/3740-1-0x00000000005F0000-0x00000000005F6000-memory.dmp

Filesize
24KB

Download
memory/3740-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download