e59746a9806739913f29baca31a4aeac0e7091d5565fbcb8b21519d461e588df

Analysis

max time kernel
149s
max time network
154s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
01/06/2024, 13:37

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General

Target

2024-06-01_a8391e40fd49dd362044ade1b9694765_cryptolocker.exe
Size

40KB
MD5

a8391e40fd49dd362044ade1b9694765
SHA1

423593e69ddd3a78973b775f55ad413ac3261f87
SHA256

e59746a9806739913f29baca31a4aeac0e7091d5565fbcb8b21519d461e588df
SHA512

1cf3e7c6997a631baa2310e8fe0962b20538ba9bb9055cf44b67af2424e40da3e151ef6fd6bd487c3c08999925e709d1d99e5c83d8573b455bd0f3b15c1682ba
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYX5b:qDdFJy3QMOtEvwDpjjWMl7TQ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1340-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b000000014e3d-11.dat	CryptoLocker_rule2
behavioral1/memory/1340-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2572-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2572-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/1340-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b000000014e3d-11.dat	CryptoLocker_set1
behavioral1/memory/1340-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2572-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2572-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1340-1-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000b000000014e3d-11.dat	UPX
behavioral1/memory/1340-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2572-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2572-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2572	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1340	2024-06-01_a8391e40fd49dd362044ade1b9694765_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1340-1-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000b000000014e3d-11.dat	upx
behavioral1/memory/1340-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2572-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2572-27-0x0000000000500000-0x0000000000510000-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 1340 wrote to memory of 2572	1340	2024-06-01_a8391e40fd49dd362044ade1b9694765_cryptolocker.exe	28
PID 1340 wrote to memory of 2572	1340	2024-06-01_a8391e40fd49dd362044ade1b9694765_cryptolocker.exe	28
PID 1340 wrote to memory of 2572	1340	2024-06-01_a8391e40fd49dd362044ade1b9694765_cryptolocker.exe	28
PID 1340 wrote to memory of 2572	1340	2024-06-01_a8391e40fd49dd362044ade1b9694765_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-06-01_a8391e40fd49dd362044ade1b9694765_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-01_a8391e40fd49dd362044ade1b9694765_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1340
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2572

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
40KB

MD5
e5cb61d6148d6a14afca252f087a900d

SHA1
4e49930d93a9515ad7d2566b5289407ef17187b4

SHA256
1755e8393d8bdc215d3de9657c1064327890cc8a7e91437cc1338a6d6b5a84bf

SHA512
d51cda614815791cb1ebb26cea06b557d579a988797ac79c105db58e58a8f81e2cc8875f1125a55a143e5ab6c5806f81375accaa6a17523f9758dd92a9df7e86

Download Submit
memory/1340-0-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/1340-2-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/1340-9-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/1340-1-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1340-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2572-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2572-26-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2572-19-0x00000000002F0000-0x00000000002F6000-memory.dmp

Filesize
24KB

Download
memory/2572-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download