6bc015310c25ba972716efa16a300932ff3e939ba9d6e17901c3fde1778b74da

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
22-05-2024 22:23

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General

Target

2024-05-22_0ac5e7401b4b5804ca4dec7b09156f68_cryptolocker.exe
Size

52KB
MD5

0ac5e7401b4b5804ca4dec7b09156f68
SHA1

73b755cc14fa0f10fe20e940141a18387e48f52c
SHA256

6bc015310c25ba972716efa16a300932ff3e939ba9d6e17901c3fde1778b74da
SHA512

4f3b3236e383311682f460bdd8d3633f0dd27911473eeadb990f342875a3b0b12d1448994a6e725223c77abf2efe03adeb74e7defa8ad1a066dc97e2ca66495b
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YY1J+OTO8:z6QFElP6n+gKmddpMOtEvwDpj31i8

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2768-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2768-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2712-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2712-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2768-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2768-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2712-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2712-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2768-1-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2768-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2712-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2712-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2712 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-22_0ac5e7401b4b5804ca4dec7b09156f68_cryptolocker.exe

pid process

2768 2024-05-22_0ac5e7401b4b5804ca4dec7b09156f68_cryptolocker.exe

pid	process
2712	asih.exe

pid	process
2768	2024-05-22_0ac5e7401b4b5804ca4dec7b09156f68_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2768-1-0x0000000000500000-0x0000000000510000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2768-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2712-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2712-25-0x0000000000500000-0x0000000000510000-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 WriteProcessMemory 4 IoCs

Processes:

2024-05-22_0ac5e7401b4b5804ca4dec7b09156f68_cryptolocker.exe

description	pid	process	target process
PID 2768 wrote to memory of 2712	2768	2024-05-22_0ac5e7401b4b5804ca4dec7b09156f68_cryptolocker.exe	asih.exe
PID 2768 wrote to memory of 2712	2768	2024-05-22_0ac5e7401b4b5804ca4dec7b09156f68_cryptolocker.exe	asih.exe
PID 2768 wrote to memory of 2712	2768	2024-05-22_0ac5e7401b4b5804ca4dec7b09156f68_cryptolocker.exe	asih.exe
PID 2768 wrote to memory of 2712	2768	2024-05-22_0ac5e7401b4b5804ca4dec7b09156f68_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_0ac5e7401b4b5804ca4dec7b09156f68_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_0ac5e7401b4b5804ca4dec7b09156f68_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2768
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2712

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\asih.exe

Filesize
53KB

MD5
acdcb32f38c807b32fd1ace4211a2764

SHA1
63c4e5140412b2941f5e99410adacf92b7603093

SHA256
a587dcc825b11483c471758802c83253103c9564e37985dcff79df11d99beb5d

SHA512
41dc0a18c92720116a2164ec7dcfbe3dce980243ca160cff52c47df103b48598a9132ec3ae834c28eac3e32cc4e9bf6930847af69c19490cf87f6014c436a51a

Download Submit
memory/2712-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2712-18-0x00000000002D0000-0x00000000002D6000-memory.dmp

Filesize
24KB

Download
memory/2712-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2768-0-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2768-1-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2768-2-0x00000000004A0000-0x00000000004A6000-memory.dmp

Filesize
24KB

Download
memory/2768-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2768-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download