8f4d7e7d41ebb684db02fc3feb0403566a810136d97bb17bb87ca037464b1126

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
20/03/2024, 02:54

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General

Target

2024-03-20_97df09a134118f1371d9dc274f84bdfc_cryptolocker.exe
Size

71KB
MD5

97df09a134118f1371d9dc274f84bdfc
SHA1

7dfdca384e32b0d5d0e77cb75648c2416da1578e
SHA256

8f4d7e7d41ebb684db02fc3feb0403566a810136d97bb17bb87ca037464b1126
SHA512

aeefbf93c3d61fe89eb41229494debd514caa46587031fc0398b4d9ebead915ef9be1751ba3348dc18a85ab3b042b76915d225b878af5e3a41ac3283e25c0461
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj9aYaFAeBt:z6a+CdOOtEvwDpjQP

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/752-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000400000001e5eb-13.dat	CryptoLocker_rule2
behavioral2/memory/752-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3488-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/752-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000400000001e5eb-13.dat	CryptoLocker_set1
behavioral2/memory/752-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3488-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/752-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000400000001e5eb-13.dat	UPX
behavioral2/memory/752-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3488-26-0x0000000000500000-0x0000000000510000-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-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation	2024-03-20_97df09a134118f1371d9dc274f84bdfc_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3488	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/752-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000400000001e5eb-13.dat	upx
behavioral2/memory/752-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3488-26-0x0000000000500000-0x0000000000510000-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 752 wrote to memory of 3488	752	2024-03-20_97df09a134118f1371d9dc274f84bdfc_cryptolocker.exe	89
PID 752 wrote to memory of 3488	752	2024-03-20_97df09a134118f1371d9dc274f84bdfc_cryptolocker.exe	89
PID 752 wrote to memory of 3488	752	2024-03-20_97df09a134118f1371d9dc274f84bdfc_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-03-20_97df09a134118f1371d9dc274f84bdfc_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-20_97df09a134118f1371d9dc274f84bdfc_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:752
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3488

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
71KB

MD5
b19374e363b2a0352eccaae740d4a88d

SHA1
b84b4a9a02ecf57df374dbd5687cdfba17cc0c61

SHA256
1ed4e2d055dcb5c7d881804af21bd819db1bd5dd6b8400e002bcd163305e2767

SHA512
aaf7b6dd274e710afdb071d7715b7963502b4d4e51e50434697fe3763dad50d1775f1acf12a2bea18edaa48983649dadef55e3510782ea2cf70c2a336d3c4a07

Download Submit
memory/752-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/752-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/752-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/752-3-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/752-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3488-21-0x0000000000830000-0x0000000000836000-memory.dmp

Filesize
24KB

Download
memory/3488-19-0x0000000000870000-0x0000000000876000-memory.dmp

Filesize
24KB

Download
memory/3488-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download