b099bfa83ca0438b9a8367bcf3b105040d5df8316a7635f6edfe4d98df314178

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
11/03/2024, 17:26

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General

Target

2024-03-11_2534f1a5c8c71903be37ceb1b607a088_cryptolocker.exe
Size

79KB
MD5

2534f1a5c8c71903be37ceb1b607a088
SHA1

6fc02d35da10e8b48b3d6e2f86750ca544934bfa
SHA256

b099bfa83ca0438b9a8367bcf3b105040d5df8316a7635f6edfe4d98df314178
SHA512

37488ae8298721c6da2c34787e573e4a5c48868fcc1730bc5c9c7caa886cf07ff5400b441727f7b90b8cb2ebf32f2d17fde00bdf2d522a5e6cec3813539da36a
SSDEEP

768:zQz7yVEhs9+syJP6ntOOtEvwDpjFelaB7pBlqrr1HBJooSeKzu1adyBM:zj+soPSMOtEvwDpj4ktBl01hJ0tq1kym

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3284-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002322e-13.dat	CryptoLocker_rule2
behavioral2/memory/3284-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3548-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3284-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000800000002322e-13.dat	CryptoLocker_set1
behavioral2/memory/3284-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3548-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3284-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000800000002322e-13.dat	UPX
behavioral2/memory/3284-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3548-26-0x0000000000500000-0x0000000000510000-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	2024-03-11_2534f1a5c8c71903be37ceb1b607a088_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3548	misid.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3284-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000800000002322e-13.dat	upx
behavioral2/memory/3284-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3548-26-0x0000000000500000-0x0000000000510000-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 3284 wrote to memory of 3548	3284	2024-03-11_2534f1a5c8c71903be37ceb1b607a088_cryptolocker.exe	89
PID 3284 wrote to memory of 3548	3284	2024-03-11_2534f1a5c8c71903be37ceb1b607a088_cryptolocker.exe	89
PID 3284 wrote to memory of 3548	3284	2024-03-11_2534f1a5c8c71903be37ceb1b607a088_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-03-11_2534f1a5c8c71903be37ceb1b607a088_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-11_2534f1a5c8c71903be37ceb1b607a088_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3284
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:3548

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\misid.exe

Filesize
79KB

MD5
0679cfbd7898fb22336099bbe82cef65

SHA1
df5892b16e40540a745aaec7e415729f85637018

SHA256
851d699f26222debd21c698edf2d0c95c497fb8a6f7d01d001e657e3e9e9c834

SHA512
d76559b33766cd462ac68bd0d994aeccc716a649e322f6d802d70b1ea1d0f77b818ccdd1e456003fc0cb8bfb26dab602f002a83241f8876856e3f51806055b48

Download Submit
memory/3284-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3284-1-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/3284-2-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/3284-3-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/3284-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3548-21-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3548-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3548-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download