27f337fcbb1ab5e9cc68b54f3f6a8b6ca629c4a9d832752c3d1d9266a3385b51

General

Target

a32fc73929edfbcc37a78fab5ea79048.exe
Size

115KB
MD5

a32fc73929edfbcc37a78fab5ea79048
SHA1

dac870fee538d45c0f397b37339d8003b4e009c5
SHA256

27f337fcbb1ab5e9cc68b54f3f6a8b6ca629c4a9d832752c3d1d9266a3385b51
SHA512

259794b1f3fe621e74379a9cf68184c4c530f3f04f510f76c0a280a070f399da24e466d2b7f96da5324b561647ed5dc1d321d776021ad19903a15d87c0e7ffeb
SSDEEP

3072:SKcWmjRrz3ZKcWmjRrz3JRzx9tSMEMZlVO5i+ic:hGyGJFx9LhlVZg

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
2752	aZ17992860rIiEa.exe
840	CTS.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4132-0-0x0000000000850000-0x0000000000867000-memory.dmp	upx
behavioral2/files/0x000c00000002322e-6.dat	upx
behavioral2/memory/840-9-0x00000000007A0000-0x00000000007B7000-memory.dmp	upx
behavioral2/memory/4132-7-0x0000000000850000-0x0000000000867000-memory.dmp	upx
behavioral2/files/0x0003000000022779-12.dat	upx
behavioral2/memory/840-41-0x00000000007A0000-0x00000000007B7000-memory.dmp	upx

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	a32fc73929edfbcc37a78fab5ea79048.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	CTS.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\CTS.exe	a32fc73929edfbcc37a78fab5ea79048.exe
File created	C:\Windows\CTS.exe	CTS.exe

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	dw20.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	dw20.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	4132	a32fc73929edfbcc37a78fab5ea79048.exe
Token: SeDebugPrivilege	840	CTS.exe
Token: SeBackupPrivilege	3288	dw20.exe
Token: SeBackupPrivilege	3288	dw20.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 4132 wrote to memory of 2752	4132	a32fc73929edfbcc37a78fab5ea79048.exe	90
PID 4132 wrote to memory of 2752	4132	a32fc73929edfbcc37a78fab5ea79048.exe	90
PID 4132 wrote to memory of 840	4132	a32fc73929edfbcc37a78fab5ea79048.exe	91
PID 4132 wrote to memory of 840	4132	a32fc73929edfbcc37a78fab5ea79048.exe	91
PID 4132 wrote to memory of 840	4132	a32fc73929edfbcc37a78fab5ea79048.exe	91
PID 2752 wrote to memory of 3288	2752	aZ17992860rIiEa.exe	93
PID 2752 wrote to memory of 3288	2752	aZ17992860rIiEa.exe	93

C:\Users\Admin\AppData\Local\Temp\a32fc73929edfbcc37a78fab5ea79048.exe
"C:\Users\Admin\AppData\Local\Temp\a32fc73929edfbcc37a78fab5ea79048.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4132
- C:\Users\Admin\AppData\Local\Temp\aZ17992860rIiEa.exe
  C:\Users\Admin\AppData\Local\Temp\aZ17992860rIiEa.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:2752
- - C:\Windows\Microsoft.NET\Framework64\v2.0.50727\dw20.exe
    dw20.exe -x -s 792
    3⤵
    - Checks processor information in registry
    - Enumerates system info in registry
    - Suspicious use of AdjustPrivilegeToken
    PID:3288
- C:\Windows\CTS.exe
  "C:\Windows\CTS.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops file in Windows directory
  - Suspicious use of AdjustPrivilegeToken
  PID:840

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml

Filesize
382KB

MD5
e241afa32198358ccd68742578b9c10d

SHA1
0e8b421783b998c7606984b8f1b127300dcf092f

SHA256
5ee449de3688c60cf7a1a17d780f307b8a47d8c657929fad69e7a44ad36c8f84

SHA512
965e1a45d77f6dc82de01b9189fd5983b020d8433fed23397a5f8c7af25f04df26e29fdd465967e8a5978183fe10206cfd7d7e195922feafa3bb33c98d945e1f

Download Submit
C:\Users\Admin\AppData\Local\Temp\aZ17992860rIiEa.exe

Filesize
56KB

MD5
e115521ba14b75f53dcdff087ec6898f

SHA1
87103a892bb514a93d485fba221bacb9da3aae25

SHA256
59b284d0ad4c2634938e70fae67d9048bd98422d052fbd745a9b80b5fae7ae29

SHA512
ab3d097bcf11bf7327a28124052b210f5fb13b9bfb9b7376cae1ba5c30182a330506935288a7fe06b7e3fdd82b57f5c31638f1c301738342819c772b346fa35a

Download Submit
C:\Windows\CTS.exe

Filesize
59KB

MD5
5efd390d5f95c8191f5ac33c4db4b143

SHA1
42d81b118815361daa3007f1a40f1576e9a9e0bc

SHA256
6028434636f349d801465f77af3a1e387a9c5032942ca6cadb6506d0800f2a74

SHA512
720fbe253483dc034307a57a2860c8629a760f883603198d1213f5290b7f236bf0f5f237728ebed50962be83dc7dc4abe61a1e9a55218778495fc6580eb20b3d

Download Submit
memory/840-9-0x00000000007A0000-0x00000000007B7000-memory.dmp

Filesize
92KB

Download
memory/840-41-0x00000000007A0000-0x00000000007B7000-memory.dmp

Filesize
92KB

Download
memory/2752-28-0x0000000000F00000-0x0000000000F10000-memory.dmp

Filesize
64KB

Download
memory/2752-27-0x00007FFFDEFA0000-0x00007FFFDF941000-memory.dmp

Filesize
9.6MB

Download
memory/2752-31-0x00007FFFDEFA0000-0x00007FFFDF941000-memory.dmp

Filesize
9.6MB

Download
memory/2752-39-0x00007FFFDEFA0000-0x00007FFFDF941000-memory.dmp

Filesize
9.6MB

Download
memory/4132-0-0x0000000000850000-0x0000000000867000-memory.dmp

Filesize
92KB

Download
memory/4132-7-0x0000000000850000-0x0000000000867000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads