2cf2e12c52cdfb10392e4d376fce074127cd563ac9549257c470666777231346

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
03/05/2024, 03:51

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General

Target

2024-05-03_b3980de5f74c84bff8bd67a631ddb2d7_cryptolocker.exe
Size

55KB
MD5

b3980de5f74c84bff8bd67a631ddb2d7
SHA1

2d68620928f12df44ebebf37ea81123c7d0d6f7a
SHA256

2cf2e12c52cdfb10392e4d376fce074127cd563ac9549257c470666777231346
SHA512

e2779127e8a5fa6449f0837438e40c8698ca8298a71f78a73490c011d29fb14642065045531a91e736447b0df8b4d9cc70a81b58ebecc04ea8e455fb67b269b6
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjNT:bP9g/xtCS3Dxx04

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral1/memory/2696-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c00000001565d-11.dat	CryptoLocker_rule2
behavioral1/memory/2828-16-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral1/memory/2696-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral1/files/0x000c00000001565d-11.dat	UPX
behavioral1/memory/2828-16-0x0000000000400000-0x000000000040E000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2828	gewos.exe

Loads dropped DLL 1 IoCs

pid	Process
2696	2024-05-03_b3980de5f74c84bff8bd67a631ddb2d7_cryptolocker.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2696-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/files/0x000c00000001565d-11.dat	upx
behavioral1/memory/2828-16-0x0000000000400000-0x000000000040E000-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
2696	2024-05-03_b3980de5f74c84bff8bd67a631ddb2d7_cryptolocker.exe
2828	gewos.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2696 wrote to memory of 2828	2696	2024-05-03_b3980de5f74c84bff8bd67a631ddb2d7_cryptolocker.exe	28
PID 2696 wrote to memory of 2828	2696	2024-05-03_b3980de5f74c84bff8bd67a631ddb2d7_cryptolocker.exe	28
PID 2696 wrote to memory of 2828	2696	2024-05-03_b3980de5f74c84bff8bd67a631ddb2d7_cryptolocker.exe	28
PID 2696 wrote to memory of 2828	2696	2024-05-03_b3980de5f74c84bff8bd67a631ddb2d7_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-03_b3980de5f74c84bff8bd67a631ddb2d7_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-03_b3980de5f74c84bff8bd67a631ddb2d7_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2696
- 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:2828

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
55KB

MD5
3b99db9a0d32ab3f170edc6ca3c4d7bb

SHA1
7d0647d3881a84832879858852acd1b638c69f15

SHA256
2e9b8b0e1ba568716c6721fe0354041d022e795ddd28b90d9e595d1339d8c11f

SHA512
d655eb1fc8098a0938f60bd32a02e6956d74c78b92846a37de00acf1ea04a38b58f8d382872a3d1c1bd5ec839876861e01f18bb14e80dc9221b02050d7a90063

Download Submit
memory/2696-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2696-9-0x0000000000390000-0x0000000000396000-memory.dmp

Filesize
24KB

Download
memory/2696-1-0x0000000000390000-0x0000000000396000-memory.dmp

Filesize
24KB

Download
memory/2696-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2828-16-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2828-25-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download