03091d9900daeb0d1fe65a1ba2a729df1782f256c256552be2b1a61ddfc6fc33

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-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
behavioral1/memory/1520-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x0010000000012248-15.dat	CryptoLocker_rule2
behavioral1/memory/1520-14-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2080-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2080-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/1520-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x0010000000012248-15.dat	CryptoLocker_set1
behavioral1/memory/1520-14-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2080-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2080-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1520-1-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x0010000000012248-15.dat	UPX
behavioral1/memory/1520-14-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2080-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2080-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2080	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1520	2024-03-18_b67cabbd9522b04d2c5a27520e39f2f0_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1520-1-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x0010000000012248-15.dat	upx
behavioral1/memory/1520-14-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2080-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2080-26-0x0000000000500000-0x0000000000510000-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 4 IoCs

description	pid	Process	procid_target
PID 1520 wrote to memory of 2080	1520	2024-03-18_b67cabbd9522b04d2c5a27520e39f2f0_cryptolocker.exe	28
PID 1520 wrote to memory of 2080	1520	2024-03-18_b67cabbd9522b04d2c5a27520e39f2f0_cryptolocker.exe	28
PID 1520 wrote to memory of 2080	1520	2024-03-18_b67cabbd9522b04d2c5a27520e39f2f0_cryptolocker.exe	28
PID 1520 wrote to memory of 2080	1520	2024-03-18_b67cabbd9522b04d2c5a27520e39f2f0_cryptolocker.exe	28

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⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1520
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2080

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

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/1520-1-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1520-0-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/1520-2-0x0000000000370000-0x0000000000376000-memory.dmp

Filesize
24KB

Download
memory/1520-3-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/1520-14-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2080-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2080-18-0x00000000002E0000-0x00000000002E6000-memory.dmp

Filesize
24KB

Download
memory/2080-22-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2080-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download