4e928a64a1109436f99277447561be4ebf689edcbf5e52ed60a397f871ca1a10

Analysis

max time kernel
147s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
01/05/2024, 20:06

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General

Target

2024-05-01_1170e3c347fec70e64a702cd0674706a_cryptolocker.exe
Size

38KB
MD5

1170e3c347fec70e64a702cd0674706a
SHA1

181d1001a5a11cfb3f2d427705cd1c01e94a25f2
SHA256

4e928a64a1109436f99277447561be4ebf689edcbf5e52ed60a397f871ca1a10
SHA512

9b188298aa0d3d5337dc55892be8a6f6780ed3f266c7d829cd6ce62b302146ed11d792e602df5c9ce36dda76cbc9c83562bbaa419f1525e51c9349928e8519b9
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYO:qDdFJy3QMOtEvwDpjjWMl7TP

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2224-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000b000000023b79-12.dat	CryptoLocker_rule2
behavioral2/memory/2224-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2872-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2224-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000b000000023b79-12.dat	CryptoLocker_set1
behavioral2/memory/2224-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2872-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2224-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000b000000023b79-12.dat	UPX
behavioral2/memory/2224-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2872-26-0x0000000000500000-0x0000000000510000-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-1-5-21-2860750803-256193626-1801997576-1000\Control Panel\International\Geo\Nation	2024-05-01_1170e3c347fec70e64a702cd0674706a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2872	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2224-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000b000000023b79-12.dat	upx
behavioral2/memory/2224-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2872-26-0x0000000000500000-0x0000000000510000-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 2224 wrote to memory of 2872	2224	2024-05-01_1170e3c347fec70e64a702cd0674706a_cryptolocker.exe	83
PID 2224 wrote to memory of 2872	2224	2024-05-01_1170e3c347fec70e64a702cd0674706a_cryptolocker.exe	83
PID 2224 wrote to memory of 2872	2224	2024-05-01_1170e3c347fec70e64a702cd0674706a_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-01_1170e3c347fec70e64a702cd0674706a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-01_1170e3c347fec70e64a702cd0674706a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2224
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2872

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
38KB

MD5
86b0d5600e56bd3fae09dc4ca92b4bd1

SHA1
820eb9c420f5b4cf8c7ca89e841f78287c800b1e

SHA256
cea967f1faf97084472109c14606d06846eabb233ec185c8081221efdf3f920f

SHA512
e42d2802a74d95e7b86d6fa5e190ecc82d5b78a61fae01f6532beb1f2b3e0be82e967c93a175f1a000a25dcc0a7569a0159eac26b74f94d5a009d50c93230791

Download Submit
memory/2224-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2224-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2224-2-0x0000000000510000-0x0000000000516000-memory.dmp

Filesize
24KB

Download
memory/2224-9-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2224-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2872-25-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2872-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2872-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download