91696d910d16610a33684f030b707fd870093ec525759f930054c1096e53dd89

Analysis

max time kernel
121s
max time network
123s
platform
windows7_x64
resource
win7-20240215-en
resource tags

arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
submitted
22-04-2024 07:29

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General

Target

2024-04-22_192bda8ff2a5e282ee68a4f153ce7e27_cryptolocker.exe
Size

55KB
MD5

192bda8ff2a5e282ee68a4f153ce7e27
SHA1

9e234e5918d85b044f30e0a6cf06fe6035956f3e
SHA256

91696d910d16610a33684f030b707fd870093ec525759f930054c1096e53dd89
SHA512

55c15f235c37d5b18b1143a481e3d6d294edd307be252202c281cdad276d93e29556ce9537b0996c584c26e235b0d3175fe52bd8bfb30a6da68ade1dbc80cff7
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjlgz6:bP9g/xtCS3Dxx0n6

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral1/memory/1888-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000a000000012252-11.dat	CryptoLocker_rule2
behavioral1/memory/2056-17-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1888-43-0x0000000000850000-0x000000000085E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral1/memory/1888-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral1/files/0x000a000000012252-11.dat	UPX
behavioral1/memory/2056-17-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral1/memory/1888-43-0x0000000000850000-0x000000000085E000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2056	gewos.exe

Loads dropped DLL 1 IoCs

pid	Process
1888	2024-04-22_192bda8ff2a5e282ee68a4f153ce7e27_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1888-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/files/0x000a000000012252-11.dat	upx
behavioral1/memory/2056-17-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/memory/1888-43-0x0000000000850000-0x000000000085E000-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
1888	2024-04-22_192bda8ff2a5e282ee68a4f153ce7e27_cryptolocker.exe
2056	gewos.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1888 wrote to memory of 2056	1888	2024-04-22_192bda8ff2a5e282ee68a4f153ce7e27_cryptolocker.exe	28
PID 1888 wrote to memory of 2056	1888	2024-04-22_192bda8ff2a5e282ee68a4f153ce7e27_cryptolocker.exe	28
PID 1888 wrote to memory of 2056	1888	2024-04-22_192bda8ff2a5e282ee68a4f153ce7e27_cryptolocker.exe	28
PID 1888 wrote to memory of 2056	1888	2024-04-22_192bda8ff2a5e282ee68a4f153ce7e27_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-22_192bda8ff2a5e282ee68a4f153ce7e27_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-22_192bda8ff2a5e282ee68a4f153ce7e27_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1888
- 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:2056

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
8a7039cef5a8efb79cb882a4e8a64dae

SHA1
a08f13293e551ed4d12f7118997c007004f65060

SHA256
5c2fcfae0d6700d0421777c33b0e72f2e9851fce7be3775d293ee8c5bc6e8841

SHA512
dd8908c0dd75f2f6cc4788989734751c36aacf4853d1679c0b4575e55d084d17c52a63dc2994fbe2a3ef83ff9d766b89e2bf259e73a8931a1dcbdc9380d462af

Download Submit
memory/1888-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/1888-1-0x00000000003B0000-0x00000000003B6000-memory.dmp

Filesize
24KB

Download
memory/1888-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1888-4-0x00000000003B0000-0x00000000003B6000-memory.dmp

Filesize
24KB

Download
memory/1888-16-0x0000000000850000-0x000000000085E000-memory.dmp

Filesize
56KB

Download
memory/1888-43-0x0000000000850000-0x000000000085E000-memory.dmp

Filesize
56KB

Download
memory/2056-17-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2056-26-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download