f4dcd6c952a3752a93303f7769f62b1552155d1d5138eef1bf4e59f645e323e7

Analysis

max time kernel
148s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
14/05/2024, 04:25

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General

Target

2024-05-14_d0da8ddb6af3d8914ec47abb3d9e518b_cryptolocker.exe
Size

40KB
MD5

d0da8ddb6af3d8914ec47abb3d9e518b
SHA1

c9a90b5e901d8007ef5338a04775edfbecbb4acd
SHA256

f4dcd6c952a3752a93303f7769f62b1552155d1d5138eef1bf4e59f645e323e7
SHA512

06870deb85a740eec7df100c9ffd010971766e917a75a2796979088fd57e39eb30dd40e18d601e55d8f30924960906aefe7dd285836c6b01aaf82932a4f392a5
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYajR:qDdFJy3QMOtEvwDpjjWMl7TdF

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1260-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000600000002327d-13.dat	CryptoLocker_rule2
behavioral2/memory/1260-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3320-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1260-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000600000002327d-13.dat	CryptoLocker_set1
behavioral2/memory/1260-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3320-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1260-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000600000002327d-13.dat	UPX
behavioral2/memory/1260-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3320-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-711569230-3659488422-571408806-1000\Control Panel\International\Geo\Nation	2024-05-14_d0da8ddb6af3d8914ec47abb3d9e518b_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3320	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1260-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000600000002327d-13.dat	upx
behavioral2/memory/1260-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3320-26-0x0000000000500000-0x0000000000510000-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 3 IoCs

description	pid	Process	procid_target
PID 1260 wrote to memory of 3320	1260	2024-05-14_d0da8ddb6af3d8914ec47abb3d9e518b_cryptolocker.exe	82
PID 1260 wrote to memory of 3320	1260	2024-05-14_d0da8ddb6af3d8914ec47abb3d9e518b_cryptolocker.exe	82
PID 1260 wrote to memory of 3320	1260	2024-05-14_d0da8ddb6af3d8914ec47abb3d9e518b_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-14_d0da8ddb6af3d8914ec47abb3d9e518b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-14_d0da8ddb6af3d8914ec47abb3d9e518b_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1260
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3320

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
40KB

MD5
34d03ce8cc683b5de90472f399f55890

SHA1
053964a1758b40e776957436883cb084b21e4dc3

SHA256
0e1dee411eb64937798e4fdde1b9d55624167caee1efb4987dd93ffaea258ec7

SHA512
c5f7a5bedf7817f72b9c30fe8e1df4089e78bdc4bb406935d4f51b2ebb25b8eb4b3161e9a6022ac45aef9b008387c6255770bc5b4549cc86aec8ef04a47cf88f

Download Submit
memory/1260-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1260-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1260-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1260-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1260-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3320-19-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/3320-25-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/3320-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download