748177f544d92a8e6a8abcab06d70d1acb9f190d112617a2d43768d7bbea4da9

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
11/04/2024, 02:24

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General

Target

2024-04-11_0e1df4fb149b021d8fe44b2e7ff9a0b3_cryptolocker.exe
Size

54KB
MD5

0e1df4fb149b021d8fe44b2e7ff9a0b3
SHA1

75ab41f9924a64d7cbb7038abc1002ffe27da4a7
SHA256

748177f544d92a8e6a8abcab06d70d1acb9f190d112617a2d43768d7bbea4da9
SHA512

2db3db7e9eddbd8268ad659077f667997ee2ea8f7de099a854b19ace04bbb58f0fdee356af2b889e0497966889c46592980c71929586d04fc28feab2e5fc49c1
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjU:bP9g/xtCS3Dxx0V

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral1/memory/2292-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c000000012339-11.dat	CryptoLocker_rule2
behavioral1/memory/3056-17-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral1/memory/2292-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral1/files/0x000c000000012339-11.dat	UPX
behavioral1/memory/3056-17-0x0000000000400000-0x000000000040E000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
3056	gewos.exe

Loads dropped DLL 1 IoCs

pid	Process
2292	2024-04-11_0e1df4fb149b021d8fe44b2e7ff9a0b3_cryptolocker.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2292-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/files/0x000c000000012339-11.dat	upx
behavioral1/memory/3056-17-0x0000000000400000-0x000000000040E000-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 UnmapMainImage 2 IoCs

pid	Process
2292	2024-04-11_0e1df4fb149b021d8fe44b2e7ff9a0b3_cryptolocker.exe
3056	gewos.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2292 wrote to memory of 3056	2292	2024-04-11_0e1df4fb149b021d8fe44b2e7ff9a0b3_cryptolocker.exe	28
PID 2292 wrote to memory of 3056	2292	2024-04-11_0e1df4fb149b021d8fe44b2e7ff9a0b3_cryptolocker.exe	28
PID 2292 wrote to memory of 3056	2292	2024-04-11_0e1df4fb149b021d8fe44b2e7ff9a0b3_cryptolocker.exe	28
PID 2292 wrote to memory of 3056	2292	2024-04-11_0e1df4fb149b021d8fe44b2e7ff9a0b3_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-11_0e1df4fb149b021d8fe44b2e7ff9a0b3_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-11_0e1df4fb149b021d8fe44b2e7ff9a0b3_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2292
- C:\Users\Admin\AppData\Local\Temp\gewos.exe
  "C:\Users\Admin\AppData\Local\Temp\gewos.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of UnmapMainImage
  PID:3056

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\gewos.exe

Filesize
54KB

MD5
dd1ade2f0bd4a2872228d905d4206f16

SHA1
88f2e6180a2278c4f7ce4fa92b2272eab0bd2349

SHA256
fbe393e0115d6da9db1387464512e36de5f5c523b30cf916a7451b06c681d12e

SHA512
aefc083c47984d003f4fbf14ca7dd19e458aa677452320c3a6eceb2d98d186f355a3fa6f3c4f599b642ce57982f4af394ec2828990e9e98257c809b5fa1322a6

Download Submit
memory/2292-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2292-1-0x0000000000530000-0x0000000000536000-memory.dmp

Filesize
24KB

Download
memory/2292-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2292-5-0x0000000000530000-0x0000000000536000-memory.dmp

Filesize
24KB

Download
memory/2292-16-0x0000000001DD0000-0x0000000001DDE000-memory.dmp

Filesize
56KB

Download
memory/2292-43-0x0000000001DD0000-0x0000000001DDE000-memory.dmp

Filesize
56KB

Download
memory/3056-17-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/3056-26-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download