02c93346144a41330282f2221eec48f37eb21a08022986a40aa0a06be33022f2

Analysis

max time kernel
118s
max time network
118s
platform
windows7_x64
resource
win7-20240419-en
resource tags

arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
submitted
22-05-2024 02:43

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General

Target

2024-05-22_a07fb3a814698d1d2aac2e85f216f6d6_cryptolocker.exe
Size

55KB
MD5

a07fb3a814698d1d2aac2e85f216f6d6
SHA1

0a3fb8f3cf80889df45a3776adb45c971892b427
SHA256

02c93346144a41330282f2221eec48f37eb21a08022986a40aa0a06be33022f2
SHA512

271b75953a6ce2e41c5a4ae8caecb813e6270b00e744fc593e560ff6757fd1fa7f1a756f3ff57d69aed5599fe9e09196cf0943800b4c6ae23da99bb4252fdfea
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjlu:bP9g/xtCS3Dxx0h

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1720-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\gewos.exe	CryptoLocker_rule2
behavioral1/memory/1720-13-0x0000000001E00000-0x0000000001E0E000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1792-17-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1720-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\gewos.exe	UPX
behavioral1/memory/1720-13-0x0000000001E00000-0x0000000001E0E000-memory.dmp	UPX
behavioral1/memory/1792-17-0x0000000000400000-0x000000000040E000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

gewos.exe

pid process

1792 gewos.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-22_a07fb3a814698d1d2aac2e85f216f6d6_cryptolocker.exe

pid process

1720 2024-05-22_a07fb3a814698d1d2aac2e85f216f6d6_cryptolocker.exe

pid	process
1792	gewos.exe

pid	process
1720	2024-05-22_a07fb3a814698d1d2aac2e85f216f6d6_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1720-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\gewos.exe	upx
behavioral1/memory/1720-13-0x0000000001E00000-0x0000000001E0E000-memory.dmp	upx
behavioral1/memory/1792-17-0x0000000000400000-0x000000000040E000-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

Processes:

2024-05-22_a07fb3a814698d1d2aac2e85f216f6d6_cryptolocker.exegewos.exe

pid process

1720 2024-05-22_a07fb3a814698d1d2aac2e85f216f6d6_cryptolocker.exe
1792 gewos.exe

pid	process
1720	2024-05-22_a07fb3a814698d1d2aac2e85f216f6d6_cryptolocker.exe
1792	gewos.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-05-22_a07fb3a814698d1d2aac2e85f216f6d6_cryptolocker.exe

description	pid	process	target process
PID 1720 wrote to memory of 1792	1720	2024-05-22_a07fb3a814698d1d2aac2e85f216f6d6_cryptolocker.exe	gewos.exe
PID 1720 wrote to memory of 1792	1720	2024-05-22_a07fb3a814698d1d2aac2e85f216f6d6_cryptolocker.exe	gewos.exe
PID 1720 wrote to memory of 1792	1720	2024-05-22_a07fb3a814698d1d2aac2e85f216f6d6_cryptolocker.exe	gewos.exe
PID 1720 wrote to memory of 1792	1720	2024-05-22_a07fb3a814698d1d2aac2e85f216f6d6_cryptolocker.exe	gewos.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_a07fb3a814698d1d2aac2e85f216f6d6_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_a07fb3a814698d1d2aac2e85f216f6d6_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1720

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:1792

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

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Downloads

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

Filesize
56KB

MD5
ac21bd4accac87a9352295bef88aa1b3

SHA1
004b412f905c9fcd723ed788234cec72dec520dd

SHA256
ab75aa8bc320d613a0df123cce20a89826b90fc602a3f75e023f77248da0a9d9

SHA512
89e5259ab4ed51d9c3b144bca28ea13ca44ae9d12149623bb6a886c4c4535d90d9cc3abe366d92b91e3040c3854ab95f1d82f88b5d0f9daf1445a258d7d6c800

Download Submit
memory/1720-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/1720-1-0x00000000003F0000-0x00000000003F6000-memory.dmp

Filesize
24KB

Download
memory/1720-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1720-9-0x00000000003F0000-0x00000000003F6000-memory.dmp

Filesize
24KB

Download
memory/1720-13-0x0000000001E00000-0x0000000001E0E000-memory.dmp

Filesize
56KB

Download
memory/1792-17-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/1792-26-0x00000000003E0000-0x00000000003E6000-memory.dmp

Filesize
24KB

Download