ac3682d111c7c22a4a3fc2a2ecd97ff7477c58db51bf54c2b15b54ccae04c136

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
07/05/2024, 11:38

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General

Target

2024-05-07_efe4545762fa5847dc569907ca7b30ac_cryptolocker.exe
Size

65KB
MD5

efe4545762fa5847dc569907ca7b30ac
SHA1

aea0011759793bd3837098c3b47d41815dabbc5b
SHA256

ac3682d111c7c22a4a3fc2a2ecd97ff7477c58db51bf54c2b15b54ccae04c136
SHA512

b075b6b501bb51ea0bc13b730682200eec205fac6b9774e68b8b77a9493b86bc5034574cfaa28c44609c1e52afe34e13b4227da7fcc8e342558a7da8d824f07c
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjY6UAXu:1nK6a+qdOOtEvwDpju

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2240-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000d00000001342e-11.dat	CryptoLocker_rule2
behavioral1/memory/3044-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2240-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3044-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2240-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000d00000001342e-11.dat	CryptoLocker_set1
behavioral1/memory/3044-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2240-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/3044-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2240-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/files/0x000d00000001342e-11.dat	UPX
behavioral1/memory/3044-16-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2240-15-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/3044-26-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
3044	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2240	2024-05-07_efe4545762fa5847dc569907ca7b30ac_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2240-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/files/0x000d00000001342e-11.dat	upx
behavioral1/memory/3044-16-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2240-15-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/3044-26-0x0000000000500000-0x000000000050F311-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 2240 wrote to memory of 3044	2240	2024-05-07_efe4545762fa5847dc569907ca7b30ac_cryptolocker.exe	28
PID 2240 wrote to memory of 3044	2240	2024-05-07_efe4545762fa5847dc569907ca7b30ac_cryptolocker.exe	28
PID 2240 wrote to memory of 3044	2240	2024-05-07_efe4545762fa5847dc569907ca7b30ac_cryptolocker.exe	28
PID 2240 wrote to memory of 3044	2240	2024-05-07_efe4545762fa5847dc569907ca7b30ac_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-07_efe4545762fa5847dc569907ca7b30ac_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-07_efe4545762fa5847dc569907ca7b30ac_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2240
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3044

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

\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
65KB

MD5
5eb6384916141cd6961ca5b3cc881f8e

SHA1
2d243e62a4081cdc9b8691c7643786dcb82bc897

SHA256
517a43bab94dd7770f5fcb0d15a23532ad8e094c83017e39f86225b3d33c9ae8

SHA512
94730fa82dca32e32e6521be26bd06738cf7f9dbbbeaeb8ab5d3bec3fdaab93d53daceee014b27922e568a108888dbdeab46504c39f68472bed24d319cb38c9b

Download Submit
memory/2240-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2240-1-0x0000000000440000-0x0000000000446000-memory.dmp

Filesize
24KB

Download
memory/2240-9-0x0000000000440000-0x0000000000446000-memory.dmp

Filesize
24KB

Download
memory/2240-2-0x0000000000480000-0x0000000000486000-memory.dmp

Filesize
24KB

Download
memory/2240-15-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3044-16-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3044-18-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/3044-25-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/3044-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download