1bb9a0fb82f02d4508917cb22e6028379b83356cc30b99c50c6a046af62b23ff

Analysis

max time kernel
148s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
27/02/2024, 20:52

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General

Target

2024-02-27_c21a4f54ce5b46d8b7bb9ea0bcdc815e_cryptolocker.exe
Size

93KB
MD5

c21a4f54ce5b46d8b7bb9ea0bcdc815e
SHA1

0a8760a5eae373622ef956c417cb99b44094e094
SHA256

1bb9a0fb82f02d4508917cb22e6028379b83356cc30b99c50c6a046af62b23ff
SHA512

54f9fc25b5d0626c11a791142162af61daca70fb58209918702f39c29c66a2d9a8bc8f9a5b5275549fc58a56b67a54fef8360e984c1bbe3387569a8a0dee7770
SSDEEP

1536:zj+soPSMOtEvwDpj4ktBl01hJl8QAPM8Ho6cRDjgx/f:zCsanOtEvwDpjBf

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/828-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023215-13.dat	CryptoLocker_rule2
behavioral2/memory/828-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1220-52-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/828-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023215-13.dat	CryptoLocker_set1
behavioral2/memory/828-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1220-52-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/828-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023215-13.dat	UPX
behavioral2/memory/828-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1220-52-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Checks computer location settings 2 TTPs 2 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-1-5-21-513485977-2495024337-1260977654-1000\Control Panel\International\Geo\Nation	2024-02-27_c21a4f54ce5b46d8b7bb9ea0bcdc815e_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-513485977-2495024337-1260977654-1000\Control Panel\International\Geo\Nation	misid.exe

Executes dropped EXE 1 IoCs

pid	Process
1220	misid.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/828-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000023215-13.dat	upx
behavioral2/memory/828-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1220-52-0x0000000000500000-0x0000000000510000-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 828 wrote to memory of 1220	828	2024-02-27_c21a4f54ce5b46d8b7bb9ea0bcdc815e_cryptolocker.exe	89
PID 828 wrote to memory of 1220	828	2024-02-27_c21a4f54ce5b46d8b7bb9ea0bcdc815e_cryptolocker.exe	89
PID 828 wrote to memory of 1220	828	2024-02-27_c21a4f54ce5b46d8b7bb9ea0bcdc815e_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-02-27_c21a4f54ce5b46d8b7bb9ea0bcdc815e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-27_c21a4f54ce5b46d8b7bb9ea0bcdc815e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:828
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  PID:1220

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\misid.exe

Filesize
93KB

MD5
801e0b780861208fb6c6b70cfcc24195

SHA1
4dc594968155cc765edc5a4619658c98893bdcb2

SHA256
2a88e38e9fb7dcf2b7b2b9fa25580ed1e285a53afef33b1f1468d22ef6a0c302

SHA512
1343c4697d3930c5e65816f0aec31b74eb280bd7841adfef85818457f7529a03282b385845955652a4c9669b126e1f6fd05b451a22563c4cd3b2d2a61fde23f1

Download Submit
memory/828-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/828-1-0x0000000002300000-0x0000000002306000-memory.dmp

Filesize
24KB

Download
memory/828-2-0x0000000002300000-0x0000000002306000-memory.dmp

Filesize
24KB

Download
memory/828-3-0x00000000021A0000-0x00000000021A6000-memory.dmp

Filesize
24KB

Download
memory/828-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1220-19-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1220-20-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/1220-52-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download