87b7beb98093105d152a4f53e872025bb2b071031445b834ef770bd95e525cdc

Analysis

max time kernel
120s
max time network
123s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
15/04/2024, 15:14

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General

Target

2024-04-15_fb0ca6f0463323aa8d993495697d04d8_cryptolocker.exe
Size

54KB
MD5

fb0ca6f0463323aa8d993495697d04d8
SHA1

9cdd2540c74e3d3a7e0aa8483303294998c6db7c
SHA256

87b7beb98093105d152a4f53e872025bb2b071031445b834ef770bd95e525cdc
SHA512

76c44e62c4cfb2399fc291f728baa998cda0be737e87242841d6b14bca423dc46f19ec73e528b67ddb6109c8ff0ef7700a07f9828f3d07a134189bdfe12018d9
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjQ:bP9g/xtCS3Dxx05

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral1/memory/2144-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x0009000000012248-11.dat	CryptoLocker_rule2
behavioral1/memory/844-17-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral1/memory/2144-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral1/files/0x0009000000012248-11.dat	UPX
behavioral1/memory/844-17-0x0000000000400000-0x000000000040E000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
844	gewos.exe

Loads dropped DLL 1 IoCs

pid	Process
2144	2024-04-15_fb0ca6f0463323aa8d993495697d04d8_cryptolocker.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2144-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/files/0x0009000000012248-11.dat	upx
behavioral1/memory/844-17-0x0000000000400000-0x000000000040E000-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
2144	2024-04-15_fb0ca6f0463323aa8d993495697d04d8_cryptolocker.exe
844	gewos.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2144 wrote to memory of 844	2144	2024-04-15_fb0ca6f0463323aa8d993495697d04d8_cryptolocker.exe	28
PID 2144 wrote to memory of 844	2144	2024-04-15_fb0ca6f0463323aa8d993495697d04d8_cryptolocker.exe	28
PID 2144 wrote to memory of 844	2144	2024-04-15_fb0ca6f0463323aa8d993495697d04d8_cryptolocker.exe	28
PID 2144 wrote to memory of 844	2144	2024-04-15_fb0ca6f0463323aa8d993495697d04d8_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-15_fb0ca6f0463323aa8d993495697d04d8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-15_fb0ca6f0463323aa8d993495697d04d8_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2144
- 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:844

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
032ccabee7108380a4985a785f04c104

SHA1
d85d226cd9bf5888932402644af4ab0151721f0c

SHA256
18e15de40d446d028994fa4ce58111f2d3bdec3f369333d7cf6ffb9b3dda7357

SHA512
6773f5d8f7fbcdc4303e6e304bff6f0f19610d8df984fe919e1995da707a58f7b44200b22aee2b9bd0578e2be3bf4926ba5dd463e2174acf8b5bc3b40d49fd4e

Download Submit
memory/844-17-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/844-22-0x0000000000260000-0x0000000000266000-memory.dmp

Filesize
24KB

Download
memory/2144-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2144-1-0x0000000000270000-0x0000000000276000-memory.dmp

Filesize
24KB

Download
memory/2144-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2144-9-0x0000000000270000-0x0000000000276000-memory.dmp

Filesize
24KB

Download
memory/2144-16-0x0000000002EE0000-0x0000000002EEE000-memory.dmp

Filesize
56KB

Download
memory/2144-46-0x0000000002EE0000-0x0000000002EEE000-memory.dmp

Filesize
56KB

Download