ad920aa9a08d242947e24e588a73a5f6f7447e6f574cea1ffe1101565d961eab

General

Target

2024-04-05_b8d189c8e7d03f45013d35c6a7c925c4_cryptolocker.exe
Size

36KB
MD5

b8d189c8e7d03f45013d35c6a7c925c4
SHA1

bacd2810571b01536da5c5812e16ef99a5c2dd1b
SHA256

ad920aa9a08d242947e24e588a73a5f6f7447e6f574cea1ffe1101565d961eab
SHA512

03d86578159ac3b950c1e923c725e1bd797923e818d0ecd30c5ce0f03b266f2a888ea5b1f02e4697f5674a0673e416bf00a07d5b1e2f814817aad50ba5adbf36
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkIT40:qDdFJy3QMOtEvwDpjjWMl7T40

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/2220-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x0009000000014abe-11.dat	CryptoLocker_rule2
behavioral1/memory/2220-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3008-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2220-15-0x0000000002AC0000-0x0000000002AD0000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3008-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/2220-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x0009000000014abe-11.dat	CryptoLocker_set1
behavioral1/memory/2220-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3008-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2220-15-0x0000000002AC0000-0x0000000002AD0000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3008-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/2220-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x0009000000014abe-11.dat	UPX
behavioral1/memory/2220-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/3008-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2220-15-0x0000000002AC0000-0x0000000002AD0000-memory.dmp	UPX
behavioral1/memory/3008-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
3008	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2220	2024-04-05_b8d189c8e7d03f45013d35c6a7c925c4_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2220-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x0009000000014abe-11.dat	upx
behavioral1/memory/2220-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/3008-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/3008-27-0x0000000000500000-0x0000000000510000-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 2220 wrote to memory of 3008	2220	2024-04-05_b8d189c8e7d03f45013d35c6a7c925c4_cryptolocker.exe	28
PID 2220 wrote to memory of 3008	2220	2024-04-05_b8d189c8e7d03f45013d35c6a7c925c4_cryptolocker.exe	28
PID 2220 wrote to memory of 3008	2220	2024-04-05_b8d189c8e7d03f45013d35c6a7c925c4_cryptolocker.exe	28
PID 2220 wrote to memory of 3008	2220	2024-04-05_b8d189c8e7d03f45013d35c6a7c925c4_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-05_b8d189c8e7d03f45013d35c6a7c925c4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-05_b8d189c8e7d03f45013d35c6a7c925c4_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2220
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3008

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
36KB

MD5
9861edef71d9f1804c301198a347fe6b

SHA1
f2aef547638b296d7992edcb8fde6a90f6ec377f

SHA256
897655acfc5c0700b0c96d8306b8bb4a017251cc0128ff5dfadd26da3bb6e638

SHA512
00ec1dbf24a271d26fb4c5b608ba5f58324872f0a8209c799191fe59ddad0e4a32a9db74b8e4821910b095a1ccf3022784c6f5a5e474d5aa26187d71bae58ebc

Download Submit
memory/2220-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2220-1-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/2220-3-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/2220-2-0x0000000000440000-0x0000000000446000-memory.dmp

Filesize
24KB

Download
memory/2220-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2220-15-0x0000000002AC0000-0x0000000002AD0000-memory.dmp

Filesize
64KB

Download
memory/3008-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3008-19-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/3008-21-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/3008-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

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