4dcaded451d0923cd4e269cb5d71edd9e377058f0ed7b74c1668bd631625dbb5

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
14/03/2024, 10:53

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General

Target

2024-03-14_fbb0599435f91fbb71f9f6ffa9e8b185_cryptolocker.exe
Size

121KB
MD5

fbb0599435f91fbb71f9f6ffa9e8b185
SHA1

fea04c159ab06f019595b6e429e4a21335ce9f17
SHA256

4dcaded451d0923cd4e269cb5d71edd9e377058f0ed7b74c1668bd631625dbb5
SHA512

1f0226408efbc9e228b5df10d5a77c1eb58632722514e5d4b471cbc68c392322c71313c147dcf3e45b32f9193bc415665eab8352d51c8a4a9bf8c5a339993f5c
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwNgpwqWsviy9t3x:z6a+CdOOtEvwDpjczM

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2768-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b000000013a88-11.dat	CryptoLocker_rule2
behavioral1/memory/2768-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2936-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2936-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2768-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b000000013a88-11.dat	CryptoLocker_set1
behavioral1/memory/2768-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2936-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2936-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2768-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000b000000013a88-11.dat	UPX
behavioral1/memory/2768-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2936-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2936-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2936	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2768	2024-03-14_fbb0599435f91fbb71f9f6ffa9e8b185_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2768-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000b000000013a88-11.dat	upx
behavioral1/memory/2768-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2936-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2936-26-0x0000000000500000-0x0000000000510000-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 2768 wrote to memory of 2936	2768	2024-03-14_fbb0599435f91fbb71f9f6ffa9e8b185_cryptolocker.exe	28
PID 2768 wrote to memory of 2936	2768	2024-03-14_fbb0599435f91fbb71f9f6ffa9e8b185_cryptolocker.exe	28
PID 2768 wrote to memory of 2936	2768	2024-03-14_fbb0599435f91fbb71f9f6ffa9e8b185_cryptolocker.exe	28
PID 2768 wrote to memory of 2936	2768	2024-03-14_fbb0599435f91fbb71f9f6ffa9e8b185_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-14_fbb0599435f91fbb71f9f6ffa9e8b185_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-14_fbb0599435f91fbb71f9f6ffa9e8b185_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2768
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2936

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
121KB

MD5
1ec78d23b2ab6b69e314a9fdf76d04c7

SHA1
af3289b74a28c9b50849faf10f097482bfdcabad

SHA256
26d88e67a2a2dae40cd954863272b088162b6ce599784658ff1d9536f4d236bf

SHA512
47b3bf08721f6a98e61f424a3171452cebbcbd2046309eb4ec2cb97607dd3414505ddd5d13569a15a7dfdaa9a183a73e9321d3d6ee33eb3fb10b699a9d00e83f

Download Submit
memory/2768-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2768-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2768-3-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2768-2-0x0000000000370000-0x0000000000376000-memory.dmp

Filesize
24KB

Download
memory/2768-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2936-18-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/2936-20-0x0000000000340000-0x0000000000346000-memory.dmp

Filesize
24KB

Download
memory/2936-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2936-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download