22248b71950159c66fc751ba3c20ddcc282e4c8164ecbc490f57fc9245a08776

Analysis

max time kernel
147s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
10/04/2024, 20:28

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General

Target

2024-04-10_7e3c302234f3c5814c54ac2fb8af72a5_cryptolocker.exe
Size

45KB
MD5

7e3c302234f3c5814c54ac2fb8af72a5
SHA1

4a1ee5e7a1eaa4d3e05e76432097386815013876
SHA256

22248b71950159c66fc751ba3c20ddcc282e4c8164ecbc490f57fc9245a08776
SHA512

88a2a9bcb27a8ccbaa80519d44f896fa0edaacc9b4fda64f9f4466fa452770b8bf73145e31261855f0f2194026e6795bfbbea64adcf85de0b8a52531ef3b68b4
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2Mo1+:qmbhXDmjr5MOtEvwDpj5cDtKkQZQa

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4236-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023221-13.dat	CryptoLocker_rule2
behavioral2/memory/4236-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4268-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/4236-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4268-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4236-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023221-13.dat	UPX
behavioral2/memory/4236-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4268-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3045580317-3728985860-206385570-1000\Control Panel\International\Geo\Nation	2024-04-10_7e3c302234f3c5814c54ac2fb8af72a5_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4268	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 4236 wrote to memory of 4268	4236	2024-04-10_7e3c302234f3c5814c54ac2fb8af72a5_cryptolocker.exe	84
PID 4236 wrote to memory of 4268	4236	2024-04-10_7e3c302234f3c5814c54ac2fb8af72a5_cryptolocker.exe	84
PID 4236 wrote to memory of 4268	4236	2024-04-10_7e3c302234f3c5814c54ac2fb8af72a5_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-04-10_7e3c302234f3c5814c54ac2fb8af72a5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-10_7e3c302234f3c5814c54ac2fb8af72a5_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4236
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4268

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
45KB

MD5
24e3ff4e2f5c3751b74f8367bc71df2d

SHA1
35f614d4e1d6d2eece382a29ac0582750298741b

SHA256
39801646d832c6f85e02a7fafbdcd0cbe9bad15d25df6bd28583fe240432b267

SHA512
7f1595a45ef2afbe5365dbc70ca822df6e6f3d638722c5147a7af517d968a43faecadb92c2bf69a7fdaad16ed6b4c6f4721ab8f39c4d636b27244c3101f64106

Download Submit
memory/4236-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4236-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/4236-2-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/4236-3-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/4236-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4268-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4268-21-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4268-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download