a69efb6de03a030bbd0f9411224f1121283e8f5ef4612825571313c468e75676

General

Target

2024-04-27_054b14f60175852c0ebb5c3eef9f00bf_cryptolocker.exe
Size

38KB
MD5

054b14f60175852c0ebb5c3eef9f00bf
SHA1

b4f9eb84b53a78d1f24d2f727fe121e2fa2db31e
SHA256

a69efb6de03a030bbd0f9411224f1121283e8f5ef4612825571313c468e75676
SHA512

a1b20f3b0df57bfe6207c0e003577647af1ed40f7137547e0619efbbfdc17a960d1ca7433899f5cca89c39b7a27d525a34ea2cb1972d4479633948ae00789e8c
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY9T:qDdFJy3QMOtEvwDpjjWMl7TE

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2292-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2292-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2736-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2736-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2292-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2292-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2736-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2736-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2292-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2292-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2736-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2736-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2736 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-04-27_054b14f60175852c0ebb5c3eef9f00bf_cryptolocker.exe

pid process

2292 2024-04-27_054b14f60175852c0ebb5c3eef9f00bf_cryptolocker.exe

pid	process
2736	asih.exe

pid	process
2292	2024-04-27_054b14f60175852c0ebb5c3eef9f00bf_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2292-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2292-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2736-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2736-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-04-27_054b14f60175852c0ebb5c3eef9f00bf_cryptolocker.exe

description	pid	process	target process
PID 2292 wrote to memory of 2736	2292	2024-04-27_054b14f60175852c0ebb5c3eef9f00bf_cryptolocker.exe	asih.exe
PID 2292 wrote to memory of 2736	2292	2024-04-27_054b14f60175852c0ebb5c3eef9f00bf_cryptolocker.exe	asih.exe
PID 2292 wrote to memory of 2736	2292	2024-04-27_054b14f60175852c0ebb5c3eef9f00bf_cryptolocker.exe	asih.exe
PID 2292 wrote to memory of 2736	2292	2024-04-27_054b14f60175852c0ebb5c3eef9f00bf_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-27_054b14f60175852c0ebb5c3eef9f00bf_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-27_054b14f60175852c0ebb5c3eef9f00bf_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2292

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 Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
38KB

MD5
89ca24ebd5409c55bdd931f779d8e90f

SHA1
a1927f1cfa0bae96f8369ce69914724d2519ee5b

SHA256
19310d69048d8fe64a1cee94f84d79447b92e93222474cfcbad508be06e3ad89

SHA512
55b03d1c58c56044758ec0ca40781f5a2ba35547101a09a4158ccff28329a7a45a26a0685ae644556122dc50e6de14a71b35cb5c5aa784c1494680ff323d40d5

Download Submit
memory/2292-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2292-1-0x00000000002D0000-0x00000000002D6000-memory.dmp

Filesize
24KB

Download
memory/2292-2-0x00000000002D0000-0x00000000002D6000-memory.dmp

Filesize
24KB

Download
memory/2292-3-0x00000000004B0000-0x00000000004B6000-memory.dmp

Filesize
24KB

Download
memory/2292-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2736-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2736-19-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/2736-26-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/2736-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads