889abd290b440b07d6fbda9603893f221a04dbab168314f1a0798a3b63cfc934

General

Target

2024-02-18_cdfb7ef0c116dd9ec2409b337b56cee0_cryptolocker.exe
Size

125KB
MD5

cdfb7ef0c116dd9ec2409b337b56cee0
SHA1

3946ab6c3169406bc7efa2e255c562bc125ce360
SHA256

889abd290b440b07d6fbda9603893f221a04dbab168314f1a0798a3b63cfc934
SHA512

bbdcdf65f0ce7dacb2e14bf1f9a0b33da8428eaeed37ad389341d438c104c4c20aefd8e2af60e55fd500ce560743ce71c662ac165de92bdfaabab930d87d453a
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp699GNtL1eU:AnBdOOtEvwDpj6za

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/2316-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000d0000000122fa-11.dat	CryptoLocker_rule2
behavioral1/memory/2316-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1948-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2316-12-0x00000000022E0000-0x00000000022EF000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1948-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/2316-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000d0000000122fa-11.dat	CryptoLocker_set1
behavioral1/memory/2316-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1948-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2316-12-0x00000000022E0000-0x00000000022EF000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1948-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/2316-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/files/0x000d0000000122fa-11.dat	UPX
behavioral1/memory/2316-15-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/1948-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2316-12-0x00000000022E0000-0x00000000022EF000-memory.dmp	UPX
behavioral1/memory/1948-27-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
1948	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2316	2024-02-18_cdfb7ef0c116dd9ec2409b337b56cee0_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2316-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/files/0x000d0000000122fa-11.dat	upx
behavioral1/memory/2316-15-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/1948-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2316-12-0x00000000022E0000-0x00000000022EF000-memory.dmp	upx
behavioral1/memory/1948-27-0x0000000000500000-0x000000000050F000-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 2316 wrote to memory of 1948	2316	2024-02-18_cdfb7ef0c116dd9ec2409b337b56cee0_cryptolocker.exe	28
PID 2316 wrote to memory of 1948	2316	2024-02-18_cdfb7ef0c116dd9ec2409b337b56cee0_cryptolocker.exe	28
PID 2316 wrote to memory of 1948	2316	2024-02-18_cdfb7ef0c116dd9ec2409b337b56cee0_cryptolocker.exe	28
PID 2316 wrote to memory of 1948	2316	2024-02-18_cdfb7ef0c116dd9ec2409b337b56cee0_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-18_cdfb7ef0c116dd9ec2409b337b56cee0_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-18_cdfb7ef0c116dd9ec2409b337b56cee0_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2316
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1948

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
126KB

MD5
4397bb2d1f5dc633010daef9ce5e1edc

SHA1
ce1ad5053d7325b49a7a67f385404c658d81cfb4

SHA256
f91892f625deebacf6f97962397bd41bfc88015cc3e13d8bdf450b24246a995a

SHA512
8cfb436a3caea64c4599742b585d8f4f6165a570f802724c1209cf917c5d4bfc06803568c77647cd2e35946867879d2fa3d166c27e82962d6daa17e58a03bb65

Download Submit
memory/1948-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1948-19-0x0000000000210000-0x0000000000216000-memory.dmp

Filesize
24KB

Download
memory/1948-26-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/1948-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2316-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2316-1-0x00000000003B0000-0x00000000003B6000-memory.dmp

Filesize
24KB

Download
memory/2316-2-0x0000000000410000-0x0000000000416000-memory.dmp

Filesize
24KB

Download
memory/2316-9-0x00000000003B0000-0x00000000003B6000-memory.dmp

Filesize
24KB

Download
memory/2316-15-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2316-12-0x00000000022E0000-0x00000000022EF000-memory.dmp

Filesize
60KB

Download

Analysis

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