5b8a74d58a12ca9c45e1b15806f72f63a64216b8a0e6162ebfbc29630a47bf55

General

Target

2024-02-12_48422d1de467d2df58a9424f2bc1fc3b_cryptolocker.exe
Size

61KB
MD5

48422d1de467d2df58a9424f2bc1fc3b
SHA1

941925b2e47630a48eadea9b43844492b46609c9
SHA256

5b8a74d58a12ca9c45e1b15806f72f63a64216b8a0e6162ebfbc29630a47bf55
SHA512

deb06b0cf3406f5e151a1a7adb42b0085762f37cbd8beee099972d61d4340e7c1a2b9e53130c0c18b9c9181406ab7a19242e4597199db2ec30cf0c30bcfd3fcd
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjY7D3:1nK6a+qdOOtEvwDpjY

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2004-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2004-13-0x00000000004E0000-0x00000000004F0000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2004-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2736-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2736-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2004-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2004-13-0x00000000004E0000-0x00000000004F0000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2004-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2736-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2736-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2004-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2004-13-0x00000000004E0000-0x00000000004F0000-memory.dmp	UPX
behavioral1/memory/2004-16-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2736-18-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2736-27-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2736 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-02-12_48422d1de467d2df58a9424f2bc1fc3b_cryptolocker.exe

pid process

2004 2024-02-12_48422d1de467d2df58a9424f2bc1fc3b_cryptolocker.exe

pid	process
2736	asih.exe

pid	process
2004	2024-02-12_48422d1de467d2df58a9424f2bc1fc3b_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2004-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2004-13-0x00000000004E0000-0x00000000004F0000-memory.dmp	upx
behavioral1/memory/2004-16-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2736-18-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2736-27-0x0000000000500000-0x000000000050F311-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

Processes:

2024-02-12_48422d1de467d2df58a9424f2bc1fc3b_cryptolocker.exe

description	pid	process	target process
PID 2004 wrote to memory of 2736	2004	2024-02-12_48422d1de467d2df58a9424f2bc1fc3b_cryptolocker.exe	asih.exe
PID 2004 wrote to memory of 2736	2004	2024-02-12_48422d1de467d2df58a9424f2bc1fc3b_cryptolocker.exe	asih.exe
PID 2004 wrote to memory of 2736	2004	2024-02-12_48422d1de467d2df58a9424f2bc1fc3b_cryptolocker.exe	asih.exe
PID 2004 wrote to memory of 2736	2004	2024-02-12_48422d1de467d2df58a9424f2bc1fc3b_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_48422d1de467d2df58a9424f2bc1fc3b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_48422d1de467d2df58a9424f2bc1fc3b_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2004

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2736

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

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Downloads

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

Filesize
61KB

MD5
142fdfc2cce89468d707e5ee9e730993

SHA1
8da50d8fb66ec39a3a5b695e53e9ff8ddcd83ad2

SHA256
7cd97235761eb5dd4cd66d3b1992c35fb8679548bf9e7dd070123688883c3dab

SHA512
de51dfbe078b212571bd2959914372d97256b7c544168c3d974db1756c593b4e76b0de4009755b075ce121cdc5e5336247aaf910bdbce5b041ecd16032916ff8

Download Submit
memory/2004-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2004-1-0x0000000000230000-0x0000000000236000-memory.dmp

Filesize
24KB

Download
memory/2004-3-0x0000000000260000-0x0000000000266000-memory.dmp

Filesize
24KB

Download
memory/2004-2-0x0000000000230000-0x0000000000236000-memory.dmp

Filesize
24KB

Download
memory/2004-13-0x00000000004E0000-0x00000000004F0000-memory.dmp

Filesize
64KB

Download
memory/2004-16-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2736-18-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2736-19-0x0000000000200000-0x0000000000206000-memory.dmp

Filesize
24KB

Download
memory/2736-21-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2736-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads