65b3219b810189b8264c8cc81896aa2ac0240c4f8a6da2c39621d01e7aadef4b

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
29/01/2024, 05:42

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General

Target

2024-01-29_ad9ae251738e1c85e9311676ea835682_cryptolocker.exe
Size

56KB
MD5

ad9ae251738e1c85e9311676ea835682
SHA1

cc181a00100abaedc6284cd121e5d3853b2f38c4
SHA256

65b3219b810189b8264c8cc81896aa2ac0240c4f8a6da2c39621d01e7aadef4b
SHA512

04b07bc76f1231093f67007339781df1afbebb957119526e4d9178bbe7bbfbde22e6cd16778d2bac7ac4b60fc4862490675997bd9757e7d339da17f0c7619557
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61s:BbdDmjr+OtEvwDpjMG

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1328-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023220-13.dat	CryptoLocker_rule2
behavioral2/memory/1328-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4576-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/1328-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4576-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1328-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023220-13.dat	UPX
behavioral2/memory/1328-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4576-26-0x0000000000500000-0x0000000000510000-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-1-5-21-768304381-2824894965-3840216961-1000\Control Panel\International\Geo\Nation	2024-01-29_ad9ae251738e1c85e9311676ea835682_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4576	asih.exe

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 1328 wrote to memory of 4576	1328	2024-01-29_ad9ae251738e1c85e9311676ea835682_cryptolocker.exe	85
PID 1328 wrote to memory of 4576	1328	2024-01-29_ad9ae251738e1c85e9311676ea835682_cryptolocker.exe	85
PID 1328 wrote to memory of 4576	1328	2024-01-29_ad9ae251738e1c85e9311676ea835682_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-01-29_ad9ae251738e1c85e9311676ea835682_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-29_ad9ae251738e1c85e9311676ea835682_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1328
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4576

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
56KB

MD5
da81840adeef40b26a81422d8c072b7d

SHA1
79bcd31e787cf131f6941858cc930f026e86bc5d

SHA256
0770d6a4feba2fd73ec412f24f2a3a0842f65c2c50c6876fb923efef0d457588

SHA512
e2a7fe57cba7a1fec119dc8e3adc355721fdecf1f6eed00ba3e1d9714d3243305f2b70f98e5c468a21330b88625d5825a9126a404244231538690a2dc03b903d

Download Submit
memory/1328-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1328-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1328-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1328-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1328-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4576-19-0x0000000001FF0000-0x0000000001FF6000-memory.dmp

Filesize
24KB

Download
memory/4576-21-0x0000000000840000-0x0000000000846000-memory.dmp

Filesize
24KB

Download
memory/4576-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download