b72d6e73c8348dc1e997781e5034893f5332145cd2c4fdfb99554279ea3c2bbe

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
28/01/2024, 08:25

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General

Target

2024-01-28_20a59c8f9e39e7ce168ba514c6d0fc45_cryptolocker.exe
Size

96KB
MD5

20a59c8f9e39e7ce168ba514c6d0fc45
SHA1

d32b64350bd689f91cd322a371fb71863e2c7919
SHA256

b72d6e73c8348dc1e997781e5034893f5332145cd2c4fdfb99554279ea3c2bbe
SHA512

4d70d88d1d2877e934cd6b2537f5fbe1e5884918b64c59504a90918366ceb3fb04d8e295fe0f7596973b12506187e8eb3fcf5e2e13e3c0a84860689a66242ed5
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbbr/BKW:z6a+CdOOtEvwDpjcX

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4000-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x001100000002315e-13.dat	CryptoLocker_rule2
behavioral2/memory/4000-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4676-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4000-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x001100000002315e-13.dat	CryptoLocker_set1
behavioral2/memory/4000-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4676-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4000-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x001100000002315e-13.dat	UPX
behavioral2/memory/4000-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4676-26-0x0000000000500000-0x0000000000510000-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	2024-01-28_20a59c8f9e39e7ce168ba514c6d0fc45_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4676	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4000-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x001100000002315e-13.dat	upx
behavioral2/memory/4000-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4676-26-0x0000000000500000-0x0000000000510000-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 4000 wrote to memory of 4676	4000	2024-01-28_20a59c8f9e39e7ce168ba514c6d0fc45_cryptolocker.exe	87
PID 4000 wrote to memory of 4676	4000	2024-01-28_20a59c8f9e39e7ce168ba514c6d0fc45_cryptolocker.exe	87
PID 4000 wrote to memory of 4676	4000	2024-01-28_20a59c8f9e39e7ce168ba514c6d0fc45_cryptolocker.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-01-28_20a59c8f9e39e7ce168ba514c6d0fc45_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-28_20a59c8f9e39e7ce168ba514c6d0fc45_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4000
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4676

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
96KB

MD5
e60b534f68a94bf1bdb649b52909ab02

SHA1
2f0b8c42587399657e5e99772b4e11652bfb3787

SHA256
ea4282518b326d6f6fa9c79590a7b28cab948181f340d5938d4f7335c4a73605

SHA512
742466638c22ee4a1e3ba3f18e3d76ff3c5bf7f051a5cf2efb4b1ff11d1da7c36355635880b14b38c9b904e2d6c9c89efbe908f04c5e6ed54f2769c63382a167

Download Submit
memory/4000-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4000-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4000-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4000-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/4000-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4676-19-0x0000000002110000-0x0000000002116000-memory.dmp

Filesize
24KB

Download
memory/4676-25-0x0000000001FD0000-0x0000000001FD6000-memory.dmp

Filesize
24KB

Download
memory/4676-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download