5238f3b3f7bf4758b14ca15efdbfdb2180c23439f659e95cba845bfa819e023f

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
18/01/2024, 23:14

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General

Target

2024-01-18_b116d2d9ecdd57f92833a8806cc7db1f_cryptolocker.exe
Size

80KB
MD5

b116d2d9ecdd57f92833a8806cc7db1f
SHA1

c2effba94b9a79509125c1535a3a0da0eeda2847
SHA256

5238f3b3f7bf4758b14ca15efdbfdb2180c23439f659e95cba845bfa819e023f
SHA512

d9bae82328617eaff6b7835957961633883a073b4219ab0da37eb44155bb376b6d83b4b0b39275733c3f21ca4183f999c13e8546952156a576cbd11a8abd66ae
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOT78:T6a+rdOOtEvwDpjNQ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2960-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000e000000023186-13.dat	CryptoLocker_rule2
behavioral2/memory/2960-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3196-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2960-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000e000000023186-13.dat	CryptoLocker_set1
behavioral2/memory/2960-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3196-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2960-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000e000000023186-13.dat	UPX
behavioral2/memory/2960-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3196-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1232405761-1209240240-3206092754-1000\Control Panel\International\Geo\Nation	2024-01-18_b116d2d9ecdd57f92833a8806cc7db1f_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3196	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2960-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000e000000023186-13.dat	upx
behavioral2/memory/2960-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3196-26-0x0000000000500000-0x0000000000510000-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 2960 wrote to memory of 3196	2960	2024-01-18_b116d2d9ecdd57f92833a8806cc7db1f_cryptolocker.exe	89
PID 2960 wrote to memory of 3196	2960	2024-01-18_b116d2d9ecdd57f92833a8806cc7db1f_cryptolocker.exe	89
PID 2960 wrote to memory of 3196	2960	2024-01-18_b116d2d9ecdd57f92833a8806cc7db1f_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-01-18_b116d2d9ecdd57f92833a8806cc7db1f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-18_b116d2d9ecdd57f92833a8806cc7db1f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2960
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3196

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
80KB

MD5
66d858a3bfcee5bf8653743bad2f6cfc

SHA1
0e48607f1e5ba71373e09a43ebabe082fdd18018

SHA256
ddbc3ee2f6a5c47ecbd32a5c4ddaa7004155ca7ae2a1e62ca688eca38269d4b2

SHA512
c7e4e5c627897ac0eea1388f79310398637b260bfa7802d39e13e7e3b56bf899e42599e73833fbea3a9528c77bf9e89faf5f3ea686f6492a63d95aa82da9d6a3

Download Submit
memory/2960-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2960-2-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/2960-1-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/2960-3-0x0000000000850000-0x0000000000856000-memory.dmp

Filesize
24KB

Download
memory/2960-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3196-19-0x0000000000760000-0x0000000000766000-memory.dmp

Filesize
24KB

Download
memory/3196-22-0x0000000000740000-0x0000000000746000-memory.dmp

Filesize
24KB

Download
memory/3196-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download