830d8fae27cfd2f3fefabb70df59fef164769e82568a252a0e562e8b01c69f80

Analysis

max time kernel
142s
max time network
143s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
21/02/2024, 22:36

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General

Target

2024-02-21_67d5639730f7de18ebf86425d0975e0e_cryptolocker.exe
Size

57KB
MD5

67d5639730f7de18ebf86425d0975e0e
SHA1

e28cfc4f9d22f8020624c102ef8cdf1222275cc9
SHA256

830d8fae27cfd2f3fefabb70df59fef164769e82568a252a0e562e8b01c69f80
SHA512

061b0e16ba743ad29c705c48dd42640c7dcd2afac1dc38653bf598907a48ec3db3b9c4c7005f2e724a04540ebfd3d39c7a4ea660648a2f3e6076989f25924652
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61n:BbdDmjr+OtEvwDpjMx

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1680-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x0006000000012247-11.dat	CryptoLocker_rule2
behavioral1/memory/1680-14-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2896-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2896-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral1/memory/1680-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1680-14-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2896-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2896-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1680-1-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x0006000000012247-11.dat	UPX
behavioral1/memory/1680-14-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2896-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2896-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2896	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1680	2024-02-21_67d5639730f7de18ebf86425d0975e0e_cryptolocker.exe

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 1680 wrote to memory of 2896	1680	2024-02-21_67d5639730f7de18ebf86425d0975e0e_cryptolocker.exe	28
PID 1680 wrote to memory of 2896	1680	2024-02-21_67d5639730f7de18ebf86425d0975e0e_cryptolocker.exe	28
PID 1680 wrote to memory of 2896	1680	2024-02-21_67d5639730f7de18ebf86425d0975e0e_cryptolocker.exe	28
PID 1680 wrote to memory of 2896	1680	2024-02-21_67d5639730f7de18ebf86425d0975e0e_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-21_67d5639730f7de18ebf86425d0975e0e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-21_67d5639730f7de18ebf86425d0975e0e_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1680
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2896

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
57KB

MD5
fc1dbcf6a8a93aa7f25fb3208e221999

SHA1
8ffd858cbb0544b861b41c9cab3d33c2d92dbf6d

SHA256
34485ca849ae1db385614764062fb282a38bbf9eb44c6f7ce2d95bedda7332b1

SHA512
2dc8f288a1fa79750a802abd96a6fb6326fe44888ddf35ec6acb2c6db39ad7c0f52b9659941bbc3b140d3999d4f58b0375f9fb53e2226ed333423ba052427b55

Download Submit
memory/1680-1-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1680-0-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/1680-2-0x0000000000510000-0x0000000000516000-memory.dmp

Filesize
24KB

Download
memory/1680-3-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/1680-14-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2896-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2896-19-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2896-18-0x0000000000270000-0x0000000000276000-memory.dmp

Filesize
24KB

Download
memory/2896-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download