20fe3d9ed110f6a98b8326bb3429d1236123d3a46d44a30fd3e3899512149b1f

General

Target

2024-02-14_6ca84ccbcd8fc8ed2cfe360b37a05bca_cryptolocker.exe
Size

58KB
MD5

6ca84ccbcd8fc8ed2cfe360b37a05bca
SHA1

85e52ae06d99a1a3f56fffecd11eef918a6280b6
SHA256

20fe3d9ed110f6a98b8326bb3429d1236123d3a46d44a30fd3e3899512149b1f
SHA512

f835d0a64c603ad69e849b9bd0c61e72142436cd866b83292d88fcc4c0350808df1036d4cbe422b47ebac2b8cddae54db0cb3a80dd0ab0b9bebbbd9ab6cbd37b
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YMLam5appgcmv:z6QFElP6n+gKmddpMOtEvwDpj9aYaQ3v

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/1940-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1940-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1940-13-0x0000000001C80000-0x0000000001C90000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b000000012234-11.dat	CryptoLocker_rule2
behavioral1/memory/2004-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2004-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/1940-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1940-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1940-13-0x0000000001C80000-0x0000000001C90000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b000000012234-11.dat	CryptoLocker_set1
behavioral1/memory/2004-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2004-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1940-1-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1940-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000b000000012234-11.dat	UPX
behavioral1/memory/2004-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2004-28-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2004	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1940	2024-02-14_6ca84ccbcd8fc8ed2cfe360b37a05bca_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1940-1-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1940-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000b000000012234-11.dat	upx
behavioral1/memory/2004-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2004-28-0x0000000000500000-0x0000000000510000-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 1940 wrote to memory of 2004	1940	2024-02-14_6ca84ccbcd8fc8ed2cfe360b37a05bca_cryptolocker.exe	28
PID 1940 wrote to memory of 2004	1940	2024-02-14_6ca84ccbcd8fc8ed2cfe360b37a05bca_cryptolocker.exe	28
PID 1940 wrote to memory of 2004	1940	2024-02-14_6ca84ccbcd8fc8ed2cfe360b37a05bca_cryptolocker.exe	28
PID 1940 wrote to memory of 2004	1940	2024-02-14_6ca84ccbcd8fc8ed2cfe360b37a05bca_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-14_6ca84ccbcd8fc8ed2cfe360b37a05bca_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-14_6ca84ccbcd8fc8ed2cfe360b37a05bca_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1940
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2004

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
58KB

MD5
4310423fc5cce11ed9ab6d6255212724

SHA1
a28423a48946396cc2363b43773a257f608e7071

SHA256
34a3b2be0ed1f8f625b476216ddd44a280d72fb4bba42f74a5857233f17d6939

SHA512
ef593ab698c292fa6d30783af00ebc2106122bab94592cccb7c0256f3f2769c0ba767018887f1cec726dc694d3b42abadab843793ab7ca802bc1b5e3f2070661

Download Submit
memory/1940-1-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1940-0-0x00000000001C0000-0x00000000001C6000-memory.dmp

Filesize
24KB

Download
memory/1940-3-0x00000000001C0000-0x00000000001C6000-memory.dmp

Filesize
24KB

Download
memory/1940-2-0x00000000003F0000-0x00000000003F6000-memory.dmp

Filesize
24KB

Download
memory/1940-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1940-13-0x0000000001C80000-0x0000000001C90000-memory.dmp

Filesize
64KB

Download
memory/1940-27-0x0000000001C80000-0x0000000001C90000-memory.dmp

Filesize
64KB

Download
memory/2004-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2004-19-0x00000000002F0000-0x00000000002F6000-memory.dmp

Filesize
24KB

Download
memory/2004-22-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/2004-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

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