fb3cbf269693778726f3078f64d89ca1ffda2e41c8b276777102d54e048256fe

Analysis

max time kernel
120s
max time network
120s
platform
windows7_x64
resource
win7-20240611-en
resource tags

arch:x64arch:x86image:win7-20240611-enlocale:en-usos:windows7-x64system
submitted
19/06/2024, 15:26

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General

Target

2024-06-19_1ab1b96c7077035658ad4349c8fc1cf9_cryptolocker.exe
Size

57KB
MD5

1ab1b96c7077035658ad4349c8fc1cf9
SHA1

de91018cf2340b488375e65919bae6c7347c6c4e
SHA256

fb3cbf269693778726f3078f64d89ca1ffda2e41c8b276777102d54e048256fe
SHA512

20f4a7a06ed4f749e76cf4ac4e414604d737976ec7c308f30eeabca7fffabe3f2aaca1a87556ff7b7571d4be4c7cf09dca19b837768adf8eb885740911a1831b
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjlbQ9mEh:bP9g/xtCS3Dxx0AQUm

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral1/memory/2088-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x0007000000012037-11.dat	CryptoLocker_rule2
behavioral1/memory/2360-17-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2088-16-0x0000000001D50000-0x0000000001D5E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral1/memory/2088-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral1/files/0x0007000000012037-11.dat	UPX
behavioral1/memory/2360-17-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral1/memory/2088-16-0x0000000001D50000-0x0000000001D5E000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2360	gewos.exe

Loads dropped DLL 1 IoCs

pid	Process
2088	2024-06-19_1ab1b96c7077035658ad4349c8fc1cf9_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2088-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/files/0x0007000000012037-11.dat	upx
behavioral1/memory/2360-17-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/memory/2088-16-0x0000000001D50000-0x0000000001D5E000-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
2088	2024-06-19_1ab1b96c7077035658ad4349c8fc1cf9_cryptolocker.exe
2360	gewos.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2088 wrote to memory of 2360	2088	2024-06-19_1ab1b96c7077035658ad4349c8fc1cf9_cryptolocker.exe	28
PID 2088 wrote to memory of 2360	2088	2024-06-19_1ab1b96c7077035658ad4349c8fc1cf9_cryptolocker.exe	28
PID 2088 wrote to memory of 2360	2088	2024-06-19_1ab1b96c7077035658ad4349c8fc1cf9_cryptolocker.exe	28
PID 2088 wrote to memory of 2360	2088	2024-06-19_1ab1b96c7077035658ad4349c8fc1cf9_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-06-19_1ab1b96c7077035658ad4349c8fc1cf9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-19_1ab1b96c7077035658ad4349c8fc1cf9_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2088
- 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:2360

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
57KB

MD5
9827cddf884548a46e8b4dc7e26450e1

SHA1
ed5b4bca401abebadf8516d3d12dc62726f89071

SHA256
64d5f849d7bcf740aeb52c05081f2572f4267d1c96db24879bf65f9190e72bf4

SHA512
940ac03ae5364a35e124d0fda5bd4256509b68a789300438f895db543147ac42e57245835525d9634b7133535ee4e54015b6077f5b65427d9b924dd926eabe96

Download Submit
memory/2088-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2088-1-0x00000000003E0000-0x00000000003E6000-memory.dmp

Filesize
24KB

Download
memory/2088-9-0x00000000003E0000-0x00000000003E6000-memory.dmp

Filesize
24KB

Download
memory/2088-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2088-16-0x0000000001D50000-0x0000000001D5E000-memory.dmp

Filesize
56KB

Download
memory/2360-17-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2360-26-0x0000000000450000-0x0000000000456000-memory.dmp

Filesize
24KB

Download