b6f1f185ff11bd583fadc15d6534cbc1e186b3ca9bc6be5e360f9a44de1a7f56

Analysis

max time kernel
148s
max time network
148s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
27/04/2024, 05:06

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General

Target

2024-04-27_aedcd09792f0247e82e0cc9fbde4f62e_cryptolocker.exe
Size

55KB
MD5

aedcd09792f0247e82e0cc9fbde4f62e
SHA1

b5322f84f92b8cbefbd6268c8c1881de6b56a4ce
SHA256

b6f1f185ff11bd583fadc15d6534cbc1e186b3ca9bc6be5e360f9a44de1a7f56
SHA512

dd2b5b127618eb2ec3d875ca8f1323cdf01dfcede410644bbe8aac635b38301f34ec3a2fd46c20453de36c318d0742ff596814b7cb1dea57a072ab8684296366
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjl+D:bP9g/xtCS3Dxx0JD

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral1/files/0x000d000000015ccd-24.dat	CryptoLocker_rule2
behavioral1/memory/2620-16-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2240-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral1/files/0x000d000000015ccd-24.dat	UPX
behavioral1/memory/2620-16-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral1/memory/2240-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2620	gewos.exe

Loads dropped DLL 1 IoCs

pid	Process
2240	2024-04-27_aedcd09792f0247e82e0cc9fbde4f62e_cryptolocker.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x000d000000015ccd-24.dat	upx
behavioral1/memory/2620-16-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/memory/2240-0-0x0000000000400000-0x000000000040E000-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
2240	2024-04-27_aedcd09792f0247e82e0cc9fbde4f62e_cryptolocker.exe
2620	gewos.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2240 wrote to memory of 2620	2240	2024-04-27_aedcd09792f0247e82e0cc9fbde4f62e_cryptolocker.exe	28
PID 2240 wrote to memory of 2620	2240	2024-04-27_aedcd09792f0247e82e0cc9fbde4f62e_cryptolocker.exe	28
PID 2240 wrote to memory of 2620	2240	2024-04-27_aedcd09792f0247e82e0cc9fbde4f62e_cryptolocker.exe	28
PID 2240 wrote to memory of 2620	2240	2024-04-27_aedcd09792f0247e82e0cc9fbde4f62e_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-27_aedcd09792f0247e82e0cc9fbde4f62e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-27_aedcd09792f0247e82e0cc9fbde4f62e_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2240
- 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:2620

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

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

Filesize
56KB

MD5
21347d8372f5d1d664310136b080fe80

SHA1
fdaa020846fae61cbd397cab4a5eb8fa9e3fedb1

SHA256
016c1dee5c1a1e3d06ef0151e7367bdf620890372103ff15c4fe96ba25f8c57c

SHA512
86315454e3293ad593e3c82c3f2e9ba4b75d8fb47fd23aa08da0c08920ecb31a26c6bd454e44ea99d7dfbc29973d56dfcebed57467c281a7166ce663382945cd

Download Submit
memory/2240-9-0x0000000000570000-0x0000000000576000-memory.dmp

Filesize
24KB

Download
memory/2240-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2240-1-0x0000000000570000-0x0000000000576000-memory.dmp

Filesize
24KB

Download
memory/2240-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2620-25-0x0000000000310000-0x0000000000316000-memory.dmp

Filesize
24KB

Download
memory/2620-16-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download