e5e1dbd76cfbebb3cb8e81a5b4670966b41c7f2ae93fbadeadf200b6df207060

General

Target

2024-02-20_12b81832c04099fe48ff342ce255b0b2_cryptolocker.exe
Size

72KB
MD5

12b81832c04099fe48ff342ce255b0b2
SHA1

0ab130dff48087476aec293cbc7b55cca9619c80
SHA256

e5e1dbd76cfbebb3cb8e81a5b4670966b41c7f2ae93fbadeadf200b6df207060
SHA512

5674acd9daabaef43f0185796b2136bf94d33fc2da64ec19f2c2944432e8a57d0bbbb8a655df6103c1ecbcd81427cbc41c2900eff017a58a5144bba10e494276
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalec:1nK6a+qdOOtEvwDpjg

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/2592-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x00090000000122be-11.dat	CryptoLocker_rule2
behavioral1/memory/2592-13-0x0000000001E20000-0x0000000001E30000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2592-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2956-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2956-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/2592-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/files/0x00090000000122be-11.dat	CryptoLocker_set1
behavioral1/memory/2592-13-0x0000000001E20000-0x0000000001E30000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2592-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2956-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2956-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/2592-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/files/0x00090000000122be-11.dat	UPX
behavioral1/memory/2592-13-0x0000000001E20000-0x0000000001E30000-memory.dmp	UPX
behavioral1/memory/2592-16-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2956-18-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2956-27-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2956	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2592	2024-02-20_12b81832c04099fe48ff342ce255b0b2_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2592-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/files/0x00090000000122be-11.dat	upx
behavioral1/memory/2592-13-0x0000000001E20000-0x0000000001E30000-memory.dmp	upx
behavioral1/memory/2592-16-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2956-18-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2956-27-0x0000000000500000-0x000000000050F311-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

description	pid	Process	procid_target
PID 2592 wrote to memory of 2956	2592	2024-02-20_12b81832c04099fe48ff342ce255b0b2_cryptolocker.exe	28
PID 2592 wrote to memory of 2956	2592	2024-02-20_12b81832c04099fe48ff342ce255b0b2_cryptolocker.exe	28
PID 2592 wrote to memory of 2956	2592	2024-02-20_12b81832c04099fe48ff342ce255b0b2_cryptolocker.exe	28
PID 2592 wrote to memory of 2956	2592	2024-02-20_12b81832c04099fe48ff342ce255b0b2_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-20_12b81832c04099fe48ff342ce255b0b2_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-20_12b81832c04099fe48ff342ce255b0b2_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2592
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2956

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
72KB

MD5
a6feec8c129e8752f901b0301b1817ff

SHA1
b08b45826f9b644ab3c909af059f933e5a1e36f2

SHA256
bb0d106fa2914c4c6cedca3537af11002371d06eedeac05dc6fcc57c3f4d0f0e

SHA512
1ad6201877ac4a3d58be39b7586a42fbb90a943defcdce1fc134f3e31483f3caba4eb05afab34675643b81515d19d9152c33d4bc51b948d13bc087f848c6e0a3

Download Submit
memory/2592-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2592-3-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2592-2-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/2592-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2592-13-0x0000000001E20000-0x0000000001E30000-memory.dmp

Filesize
64KB

Download
memory/2592-16-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2956-19-0x0000000000210000-0x0000000000216000-memory.dmp

Filesize
24KB

Download
memory/2956-21-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2956-18-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2956-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download

Analysis

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