a0ca9fd8f3ed491e75d605c20321d924477b4f808a1e024afe24d2078fe53d36

Analysis

max time kernel
119s
max time network
121s
platform
windows7_x64
resource
win7-20240215-en
resource tags

arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
submitted
17-04-2024 03:28

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General

Target

2024-04-17_0de0f079e5146e22f5136c28f2a1b0d8_cryptolocker.exe
Size

54KB
MD5

0de0f079e5146e22f5136c28f2a1b0d8
SHA1

cae098cdbe3f22bcabb00a34a603af24b3bae9b2
SHA256

a0ca9fd8f3ed491e75d605c20321d924477b4f808a1e024afe24d2078fe53d36
SHA512

64966e0ad7665a5721d9bdbe869c61a9dd1d23a8f7ebdb9e7f77a19d76fdf6e43df73f1b1ff68363ca131467494497b709e77dab43ee1651739eba5087e342c6
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjlO:bP9g/xtCS3Dxx0R

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral1/memory/2744-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000a000000012252-11.dat	CryptoLocker_rule2
behavioral1/memory/2744-13-0x0000000001E40000-0x0000000001E4E000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2580-17-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral1/memory/2744-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral1/files/0x000a000000012252-11.dat	UPX
behavioral1/memory/2744-13-0x0000000001E40000-0x0000000001E4E000-memory.dmp	UPX
behavioral1/memory/2580-17-0x0000000000400000-0x000000000040E000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2580	gewos.exe

Loads dropped DLL 1 IoCs

pid	Process
2744	2024-04-17_0de0f079e5146e22f5136c28f2a1b0d8_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2744-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/files/0x000a000000012252-11.dat	upx
behavioral1/memory/2744-13-0x0000000001E40000-0x0000000001E4E000-memory.dmp	upx
behavioral1/memory/2580-17-0x0000000000400000-0x000000000040E000-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
2744	2024-04-17_0de0f079e5146e22f5136c28f2a1b0d8_cryptolocker.exe
2580	gewos.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2744 wrote to memory of 2580	2744	2024-04-17_0de0f079e5146e22f5136c28f2a1b0d8_cryptolocker.exe	28
PID 2744 wrote to memory of 2580	2744	2024-04-17_0de0f079e5146e22f5136c28f2a1b0d8_cryptolocker.exe	28
PID 2744 wrote to memory of 2580	2744	2024-04-17_0de0f079e5146e22f5136c28f2a1b0d8_cryptolocker.exe	28
PID 2744 wrote to memory of 2580	2744	2024-04-17_0de0f079e5146e22f5136c28f2a1b0d8_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-17_0de0f079e5146e22f5136c28f2a1b0d8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-17_0de0f079e5146e22f5136c28f2a1b0d8_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2744
- 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:2580

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
11798553b4d2c5aa6c581ce185e2cb93

SHA1
f1078b71c49f173da0c5e0f3fd68e82039cbf239

SHA256
ddcf3767a5602e4d2584338357becfc106cd63f689b62a96284a5d93e3c9d8e4

SHA512
7f0f4cb50a285e49be3d4f0391e06071223d0e79eeacdba2216ee4d09c0e60d8d395108bc057306b8c35d3acf363a1d068a3bd774661458f088a1bbc960ee573

Download Submit
memory/2580-17-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2580-26-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/2744-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2744-1-0x0000000000390000-0x0000000000396000-memory.dmp

Filesize
24KB

Download
memory/2744-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2744-9-0x0000000000390000-0x0000000000396000-memory.dmp

Filesize
24KB

Download
memory/2744-13-0x0000000001E40000-0x0000000001E4E000-memory.dmp

Filesize
56KB

Download