bc1ca99e2357a5d2a7cf04fecda3221ee8ca519fad6361b0541876a998ff68f9

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
10/03/2024, 09:43

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General

Target

2024-03-10_9ee81baf356ebeeca3b1250a27f180ce_cryptolocker.exe
Size

110KB
MD5

9ee81baf356ebeeca3b1250a27f180ce
SHA1

cb468b36a7e7936e6fb921ea0dbbc87ec4fc8b72
SHA256

bc1ca99e2357a5d2a7cf04fecda3221ee8ca519fad6361b0541876a998ff68f9
SHA512

f263582da5ef9eabb431d66796bb552c5365733b951233881d54e70be38620bb3b424e65462145c28420c0f70ff62515ba11a6012eb8509f78947e48a290b56d
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwMghJOvjP:z6a+CdOOtEvwDpjcze

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1984-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000400000001e980-13.dat	CryptoLocker_rule2
behavioral2/memory/1984-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2284-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1984-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000400000001e980-13.dat	CryptoLocker_set1
behavioral2/memory/1984-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2284-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1984-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000400000001e980-13.dat	UPX
behavioral2/memory/1984-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2284-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3270530367-132075249-2153716227-1000\Control Panel\International\Geo\Nation	2024-03-10_9ee81baf356ebeeca3b1250a27f180ce_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2284	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1984-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000400000001e980-13.dat	upx
behavioral2/memory/1984-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2284-26-0x0000000000500000-0x0000000000510000-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 1984 wrote to memory of 2284	1984	2024-03-10_9ee81baf356ebeeca3b1250a27f180ce_cryptolocker.exe	89
PID 1984 wrote to memory of 2284	1984	2024-03-10_9ee81baf356ebeeca3b1250a27f180ce_cryptolocker.exe	89
PID 1984 wrote to memory of 2284	1984	2024-03-10_9ee81baf356ebeeca3b1250a27f180ce_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-03-10_9ee81baf356ebeeca3b1250a27f180ce_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-10_9ee81baf356ebeeca3b1250a27f180ce_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1984
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2284

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
110KB

MD5
05469a9024057046ef5840724e5f7697

SHA1
566aca31dd26d5685b595cc51375a18db945b261

SHA256
ba6829b33cba4042ceb00eb67c73fb91d03ec3133758884ea330f9c5676aa128

SHA512
0b227f891bef9912c4612d173d61fe5f0445956c16769a858ce045c0b4a138e8a54e6b0313a97cc3f7aa4ad097d3084d13b89181278006a9ec546eaee7f856cb

Download Submit
memory/1984-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1984-1-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/1984-2-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/1984-3-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/1984-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2284-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2284-25-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2284-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download