b48cd1ed78d9f5db54b1ea0a08847355a2667b531be7d99cd5ea60c1146accdd

General

Target

2024-03-19_4c6f899a01c8ebaf622999c3823ce45b_cryptolocker.exe
Size

65KB
MD5

4c6f899a01c8ebaf622999c3823ce45b
SHA1

dadcfe886bc6228a5821cb948ec03edaa1547a49
SHA256

b48cd1ed78d9f5db54b1ea0a08847355a2667b531be7d99cd5ea60c1146accdd
SHA512

c451c38d5609486977e75e25942eb9e0549d17125e036a553dfe3e8466a3a9500a0231412bb94e8c05c564b0903b16c65c3d139f589a35b2d44b27ec0019f4de
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYjc3CBx:1nK6a+qdOOtEvwDpjsx

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/3068-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c000000012329-11.dat	CryptoLocker_rule2
behavioral1/memory/3068-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1988-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3068-13-0x00000000006A0000-0x00000000006B0000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1988-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/3068-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000c000000012329-11.dat	CryptoLocker_set1
behavioral1/memory/3068-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/1988-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/3068-13-0x00000000006A0000-0x00000000006B0000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1988-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/3068-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/files/0x000c000000012329-11.dat	UPX
behavioral1/memory/3068-15-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/1988-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/3068-13-0x00000000006A0000-0x00000000006B0000-memory.dmp	UPX
behavioral1/memory/1988-27-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
1988	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
3068	2024-03-19_4c6f899a01c8ebaf622999c3823ce45b_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/3068-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/files/0x000c000000012329-11.dat	upx
behavioral1/memory/3068-15-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/1988-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/3068-13-0x00000000006A0000-0x00000000006B0000-memory.dmp	upx
behavioral1/memory/1988-27-0x0000000000500000-0x000000000050F311-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 3068 wrote to memory of 1988	3068	2024-03-19_4c6f899a01c8ebaf622999c3823ce45b_cryptolocker.exe	28
PID 3068 wrote to memory of 1988	3068	2024-03-19_4c6f899a01c8ebaf622999c3823ce45b_cryptolocker.exe	28
PID 3068 wrote to memory of 1988	3068	2024-03-19_4c6f899a01c8ebaf622999c3823ce45b_cryptolocker.exe	28
PID 3068 wrote to memory of 1988	3068	2024-03-19_4c6f899a01c8ebaf622999c3823ce45b_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-19_4c6f899a01c8ebaf622999c3823ce45b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-19_4c6f899a01c8ebaf622999c3823ce45b_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:3068
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1988

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
65KB

MD5
2a42566b93ee39d8bcc6b35cb4269972

SHA1
86906d08e5adfd5110bc8dd474115c22ef793eac

SHA256
cce500a5b102fa1aa5c10ca11d7568e027255371f426b426c771112dceb23b7f

SHA512
e9291e33da8c38263547d31d3e7def2c758abf0fdfc3cfee394aa99c30409d974d33364dfb2c47ee0c72b89f9f428f7192f2d11e15818cb97230348c5c2a63b5

Download Submit
memory/1988-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1988-19-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/1988-24-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/1988-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3068-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3068-1-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/3068-2-0x0000000000310000-0x0000000000316000-memory.dmp

Filesize
24KB

Download
memory/3068-9-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/3068-15-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3068-13-0x00000000006A0000-0x00000000006B0000-memory.dmp

Filesize
64KB

Download

Analysis

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