03091d9900daeb0d1fe65a1ba2a729df1782f256c256552be2b1a61ddfc6fc33

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
18/03/2024, 23:38

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General

Target

2024-03-18_b67cabbd9522b04d2c5a27520e39f2f0_cryptolocker.exe
Size

35KB
MD5

b67cabbd9522b04d2c5a27520e39f2f0
SHA1

7e0f27fa047a9d56eb5d7e312214e0aa26d9d15c
SHA256

03091d9900daeb0d1fe65a1ba2a729df1782f256c256552be2b1a61ddfc6fc33
SHA512

1caa01287f69b82f3296cce1af51dd1ab9ae438792eb581e646f50de6e8b1364a5fd3f7233bf9a197c592f9a9a1fa737ef229ff461424b6f56bd10a12fb51253
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkP:qDdFJy3QMOtEvwDpjjWMlM

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3980-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023211-13.dat	CryptoLocker_rule2
behavioral2/memory/1784-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3980-20-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1784-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/3980-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023211-13.dat	CryptoLocker_set1
behavioral2/memory/1784-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3980-20-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1784-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/3980-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023211-13.dat	UPX
behavioral2/memory/1784-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3980-20-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1784-27-0x0000000000500000-0x0000000000510000-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-1-5-21-609813121-2907144057-1731107329-1000\Control Panel\International\Geo\Nation	2024-03-18_b67cabbd9522b04d2c5a27520e39f2f0_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1784	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3980-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0007000000023211-13.dat	upx
behavioral2/memory/1784-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3980-20-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1784-27-0x0000000000500000-0x0000000000510000-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 3980 wrote to memory of 1784	3980	2024-03-18_b67cabbd9522b04d2c5a27520e39f2f0_cryptolocker.exe	88
PID 3980 wrote to memory of 1784	3980	2024-03-18_b67cabbd9522b04d2c5a27520e39f2f0_cryptolocker.exe	88
PID 3980 wrote to memory of 1784	3980	2024-03-18_b67cabbd9522b04d2c5a27520e39f2f0_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-03-18_b67cabbd9522b04d2c5a27520e39f2f0_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-18_b67cabbd9522b04d2c5a27520e39f2f0_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3980
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1784

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
35KB

MD5
030335a37e2f210c712bee69d4bcbb1d

SHA1
8150fd747b2a75ecbe6acc35e5819980e8d7b0a5

SHA256
6cf44112dd8505da598965f17d18031b41df1b335256b63357c1c6c646b6357b

SHA512
95af15794af8d2298cf776f879d30015d63ecaa0328083eef613339217f3db44da51a7df9b04ec6e2bcb30100ce1587fe52f45120951955bace7744057f5712e

Download Submit
memory/1784-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1784-21-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/1784-19-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/1784-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3980-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3980-1-0x0000000000740000-0x0000000000746000-memory.dmp

Filesize
24KB

Download
memory/3980-2-0x0000000000740000-0x0000000000746000-memory.dmp

Filesize
24KB

Download
memory/3980-3-0x0000000000760000-0x0000000000766000-memory.dmp

Filesize
24KB

Download
memory/3980-20-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download