8557c4a1c552b908e46d6b34a8695e2926ef9483b1604c2b826a90ac0cce82c8

Analysis

max time kernel
146s
max time network
166s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
14/03/2024, 01:27

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General

Target

2024-03-14_627d683a34ac1a7f15cc5e48d8b157b8_cryptolocker.exe
Size

68KB
MD5

627d683a34ac1a7f15cc5e48d8b157b8
SHA1

e61c3df1e23eebca21f78e6d319d13c2378d9b4a
SHA256

8557c4a1c552b908e46d6b34a8695e2926ef9483b1604c2b826a90ac0cce82c8
SHA512

028c840e192624059fce4102f327271424fa2e67282f41bf8051f880eff27d5b4131ced255fcfba758a09879b8dd8cdebfeea9702e570dfe8b0729d87fef06bb
SSDEEP

1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs9X:C4Q2c94OtEvwDpj4H8za

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3020-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0004000000022747-13.dat	CryptoLocker_rule2
behavioral2/memory/3020-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1604-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/3020-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1604-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3020-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0004000000022747-13.dat	UPX
behavioral2/memory/3020-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1604-26-0x0000000000500000-0x0000000000510000-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-1-5-21-2727153400-192325109-1870347593-1000\Control Panel\International\Geo\Nation	2024-03-14_627d683a34ac1a7f15cc5e48d8b157b8_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1604	misid.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3020-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0004000000022747-13.dat	upx
behavioral2/memory/3020-25-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1604-26-0x0000000000500000-0x0000000000510000-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 3020 wrote to memory of 1604	3020	2024-03-14_627d683a34ac1a7f15cc5e48d8b157b8_cryptolocker.exe	90
PID 3020 wrote to memory of 1604	3020	2024-03-14_627d683a34ac1a7f15cc5e48d8b157b8_cryptolocker.exe	90
PID 3020 wrote to memory of 1604	3020	2024-03-14_627d683a34ac1a7f15cc5e48d8b157b8_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-03-14_627d683a34ac1a7f15cc5e48d8b157b8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-14_627d683a34ac1a7f15cc5e48d8b157b8_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3020
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:1604

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\misid.exe

Filesize
68KB

MD5
232fef648615f2c4f009f4576ebef951

SHA1
f810ccd4dab5e4e70c7fd56e90fb1c1d1c56899d

SHA256
0982d3bdad7a6fa92bab17af67a9b8f9e08d53f625af486d445e49071adddd9b

SHA512
ec19f42bdacf4a7a775d4927567ea6312207580e0291c9216b3ba2da1285528bbb0500e1aff7a41a9bc2ec48d780614fe2dfceae5ea3e5eab125a994b83b92dd

Download Submit
memory/1604-18-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1604-19-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/1604-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3020-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3020-1-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/3020-2-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/3020-3-0x0000000000810000-0x0000000000816000-memory.dmp

Filesize
24KB

Download
memory/3020-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download