8a00bf228cb70de90eb382a239c24968e497cf79e6d965882ba9638ce87939fb

Analysis

max time kernel
147s
max time network
148s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
23-05-2024 02:30

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General

Target

2024-05-23_597c68fe4ed9e4eb7051ef7454c0c89f_cryptolocker.exe
Size

39KB
MD5

597c68fe4ed9e4eb7051ef7454c0c89f
SHA1

5d2d84f50f6ee0384ab3c4477fb5588e767e15f0
SHA256

8a00bf228cb70de90eb382a239c24968e497cf79e6d965882ba9638ce87939fb
SHA512

17e631fbb58a81467c437e28d8dc2516782cec6b0448eeeb849f582c13b26f42a2045fb4a2734c4cd083ebde266b1329e5c98f0a1a0a018bd873d871868e784f
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY/:qDdFJy3QMOtEvwDpjjWMl7T+

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1900-8-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/1900-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2976-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2976-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1900-8-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/1900-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2976-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2976-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1900-8-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/1900-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2976-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2976-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2976 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-23_597c68fe4ed9e4eb7051ef7454c0c89f_cryptolocker.exe

pid process

1900 2024-05-23_597c68fe4ed9e4eb7051ef7454c0c89f_cryptolocker.exe

pid	process
2976	asih.exe

pid	process
1900	2024-05-23_597c68fe4ed9e4eb7051ef7454c0c89f_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1900-8-0x0000000000500000-0x0000000000510000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/1900-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2976-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2976-27-0x0000000000500000-0x0000000000510000-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:

2024-05-23_597c68fe4ed9e4eb7051ef7454c0c89f_cryptolocker.exe

description	pid	process	target process
PID 1900 wrote to memory of 2976	1900	2024-05-23_597c68fe4ed9e4eb7051ef7454c0c89f_cryptolocker.exe	asih.exe
PID 1900 wrote to memory of 2976	1900	2024-05-23_597c68fe4ed9e4eb7051ef7454c0c89f_cryptolocker.exe	asih.exe
PID 1900 wrote to memory of 2976	1900	2024-05-23_597c68fe4ed9e4eb7051ef7454c0c89f_cryptolocker.exe	asih.exe
PID 1900 wrote to memory of 2976	1900	2024-05-23_597c68fe4ed9e4eb7051ef7454c0c89f_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_597c68fe4ed9e4eb7051ef7454c0c89f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_597c68fe4ed9e4eb7051ef7454c0c89f_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1900

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2976

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
39KB

MD5
500ea9fa67d0101207fb51682328cf45

SHA1
e3fbdba41f7c4aa2a2eaa2d4d9de9823e16fae6d

SHA256
0fe738aca1f5f8434eae17521a19002f5bd9a02123666e5a6c15b1719433936d

SHA512
0f822df0fcd3e0901d51348df2ba242b630e02a270083ce41bd4738705e5251926a47fac3e9a9b5685ffec847b37849811169b0b24838a2a45766e6ddf88e7ca

Download Submit
memory/1900-0-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/1900-1-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/1900-9-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/1900-8-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1900-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2976-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2976-26-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2976-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download