addb328d597626b192e0ea0dfe07918033fc881a325e3f1fa9ea87de43b585b8

Analysis

max time kernel
121s
max time network
126s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
27/05/2024, 02:36

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General

Target

2024-05-27_72faecfc21b7f09a2605f851d294317b_cryptolocker.exe
Size

56KB
MD5

72faecfc21b7f09a2605f851d294317b
SHA1

3ec3d5d8c44d632f4cd5ab710cdd65615a729a9f
SHA256

addb328d597626b192e0ea0dfe07918033fc881a325e3f1fa9ea87de43b585b8
SHA512

c27fda97b86b9874f6700a1194ba45403805841f633c6cb2048760e556d080367e179c3f8b6b3e5031e3cfb1eb3cd2e0ce96bc3d8a79abec512098ece2ce61d6
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjlYG:bP9g/xtCS3Dxx0LG

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 2 IoCs

resource	yara_rule
behavioral1/memory/2256-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c00000001445e-11.dat	CryptoLocker_rule2

UPX dump on OEP (original entry point) 2 IoCs

resource	yara_rule
behavioral1/memory/2256-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral1/files/0x000c00000001445e-11.dat	UPX

Executes dropped EXE 1 IoCs

pid	Process
2940	gewos.exe

Loads dropped DLL 1 IoCs

pid	Process
2256	2024-05-27_72faecfc21b7f09a2605f851d294317b_cryptolocker.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2256-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/files/0x000c00000001445e-11.dat	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
2256	2024-05-27_72faecfc21b7f09a2605f851d294317b_cryptolocker.exe
2940	gewos.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2256 wrote to memory of 2940	2256	2024-05-27_72faecfc21b7f09a2605f851d294317b_cryptolocker.exe	28
PID 2256 wrote to memory of 2940	2256	2024-05-27_72faecfc21b7f09a2605f851d294317b_cryptolocker.exe	28
PID 2256 wrote to memory of 2940	2256	2024-05-27_72faecfc21b7f09a2605f851d294317b_cryptolocker.exe	28
PID 2256 wrote to memory of 2940	2256	2024-05-27_72faecfc21b7f09a2605f851d294317b_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-27_72faecfc21b7f09a2605f851d294317b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-27_72faecfc21b7f09a2605f851d294317b_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2256
- 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:2940

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
56KB

MD5
2b42aa6b7f60086aaf57823f5b529b5c

SHA1
83ceb2efd89885fd9eac2990ede290d7afdb180a

SHA256
30764775f46b901171a907b8e367686cba2d74d7fcb80c4004a0547e5652e25e

SHA512
5afbd1f75850a0ee3dc772d8143f8a767d33a4ad4e279cd74fc0cf50aea372fd2d2d3c58169620b54624aa1b3eae09b7e5d1fa2dbd34b24d99ded543ba2652ac

Download Submit
memory/2256-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2256-1-0x0000000000370000-0x0000000000376000-memory.dmp

Filesize
24KB

Download
memory/2256-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2256-9-0x0000000000370000-0x0000000000376000-memory.dmp

Filesize
24KB

Download
memory/2940-17-0x00000000001F0000-0x00000000001F6000-memory.dmp

Filesize
24KB

Download