agenttesla | 9bd66b6fa9050edf01d12180e4569c464f47e3235d5a912c9d2e91b6461e8f23

General

Target

RHGP0987090H.xlsx
Size

2.1MB
MD5

55a94ebc4a3702f57aacb4633d36424e
SHA1

eb1cc363bbe0e61efcbb9fdb31d58b3cb714189e
SHA256

9bd66b6fa9050edf01d12180e4569c464f47e3235d5a912c9d2e91b6461e8f23
SHA512

adfcf48ac7cc0d40ee8665eee45147204a721fd3205febfd1ded8738104684ebbd74cf7e8fbef551cbd6c82b9999e1f9546918a79b3de7fb23d410ba82d0f5e1
SSDEEP

49152:cpfIiqBbNgp+blM1X2fjuQvW4hMalpBgNZVOhOPsTRYLXSOu:8eBbxby1ejuQvLxpBgNZghOSYud

Score

10^/10

agenttesla discovery keylogger spyware stealer trojan upx

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: ftp
Host:
ftp://ftp.antoniomayol.com:21
Port:
21
Username:
[email protected]
Password:
cMhKDQUk1{;%

Signatures

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla
Agenttesla family
agenttesla

Blocklisted process makes network request 1 IoCs

flow	pid	Process
4	2096	EQNEDT32.EXE

Downloads MZ/PE file 1 IoCs

flow	pid	Process
4	2096	EQNEDT32.EXE

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\resharing.vbs	resharing.exe

Executes dropped EXE 2 IoCs

pid	Process
3044	name.exe
2256	resharing.exe

Loads dropped DLL 5 IoCs

pid	Process
2096	EQNEDT32.EXE
2096	EQNEDT32.EXE
2096	EQNEDT32.EXE
2096	EQNEDT32.EXE
3044	name.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
7	ip-api.com

AutoIT Executable 3 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/memory/3044-40-0x0000000001150000-0x0000000001288000-memory.dmp	autoit_exe
behavioral1/memory/2256-41-0x0000000000AD0000-0x0000000000C08000-memory.dmp	autoit_exe
behavioral1/memory/2256-62-0x0000000000AD0000-0x0000000000C08000-memory.dmp	autoit_exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2256 set thread context of 2812	2256	resharing.exe	32

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x00060000000186bb-6.dat	upx
behavioral1/memory/3044-20-0x0000000001150000-0x0000000001288000-memory.dmp	upx
behavioral1/memory/3044-40-0x0000000001150000-0x0000000001288000-memory.dmp	upx
behavioral1/memory/2256-41-0x0000000000AD0000-0x0000000000C08000-memory.dmp	upx
behavioral1/memory/2256-62-0x0000000000AD0000-0x0000000000C08000-memory.dmp	upx

System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	EQNEDT32.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	name.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	resharing.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegSvcs.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	EXCEL.EXE

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor	EXCEL.EXE

Launches Equation Editor 1 TTPs 1 IoCs

Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

exploit

Exploitation for Client Execution

T1203

pid	Process
2096	EQNEDT32.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2304	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2812	RegSvcs.exe
2812	RegSvcs.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2256	resharing.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2812	RegSvcs.exe

Suspicious use of FindShellTrayWindow 4 IoCs

pid	Process
3044	name.exe
3044	name.exe
2256	resharing.exe
2256	resharing.exe

Suspicious use of SendNotifyMessage 4 IoCs

pid	Process
3044	name.exe
3044	name.exe
2256	resharing.exe
2256	resharing.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2304	EXCEL.EXE
2304	EXCEL.EXE
2304	EXCEL.EXE

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2096 wrote to memory of 3044	2096	EQNEDT32.EXE	30
PID 2096 wrote to memory of 3044	2096	EQNEDT32.EXE	30
PID 2096 wrote to memory of 3044	2096	EQNEDT32.EXE	30
PID 2096 wrote to memory of 3044	2096	EQNEDT32.EXE	30
PID 3044 wrote to memory of 2256	3044	name.exe	31
PID 3044 wrote to memory of 2256	3044	name.exe	31
PID 3044 wrote to memory of 2256	3044	name.exe	31
PID 3044 wrote to memory of 2256	3044	name.exe	31
PID 2256 wrote to memory of 2812	2256	resharing.exe	32
PID 2256 wrote to memory of 2812	2256	resharing.exe	32
PID 2256 wrote to memory of 2812	2256	resharing.exe	32
PID 2256 wrote to memory of 2812	2256	resharing.exe	32
PID 2256 wrote to memory of 2812	2256	resharing.exe	32
PID 2256 wrote to memory of 2812	2256	resharing.exe	32
PID 2256 wrote to memory of 2812	2256	resharing.exe	32
PID 2256 wrote to memory of 2812	2256	resharing.exe	32

C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\RHGP0987090H.xlsx
1⤵
- System Location Discovery: System Language Discovery
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:2304

C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
"C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
1⤵
- Blocklisted process makes network request
- Downloads MZ/PE file
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Launches Equation Editor
- Suspicious use of WriteProcessMemory
PID:2096
- C:\Users\Admin\AppData\Local\Temp\name.exe
  "C:\Users\Admin\AppData\Local\Temp\name.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:3044
- - C:\Users\Admin\AppData\Local\carryover\resharing.exe
    "C:\Users\Admin\AppData\Local\Temp\name.exe"
    3⤵
    - Drops startup file
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of FindShellTrayWindow
    - Suspicious use of SendNotifyMessage
    - Suspicious use of WriteProcessMemory
    PID:2256
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
      "C:\Users\Admin\AppData\Local\Temp\name.exe"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2812

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Exploitation for Client Execution

1

T1203

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\Bactris

Filesize
239KB

MD5
fe6de6f3b83c0f58e03ff56f75a6a795

SHA1
e1f693f30e87e9154908340cb6dcef39204c38b7

SHA256
8e8387f0919ca9165297f885ad2e0508d76b0a8fcecfab2d305f699d7ba7bb7f

SHA512
fc448458eacb4782360babe29902ca8773fb8f449385eab998cd8175f00f91e53166a5d0e6ba25d3bbc13fe6f9f9ec7da90887e4b3a4da5483a5a7f8094805e6

Download Submit
C:\Users\Admin\AppData\Local\Temp\lards

Filesize
56KB

MD5
35d6e945f00657419d4365878456dcbf

SHA1
743d7f6795f1a6af87c6b013c9f9e885c9f6c721

SHA256
5ba5095b5910ed46110a6a2247b2ae43c27c8cb59930cd3f97865efcd5f79689

SHA512
3f4a7fbd77c673c1d591555cd0858daffb14b70b709d3805fcc82aa8a6aa074203a07ae6a2b264e8f9be7a26b33ebaf29817091020bcb6f145fdfc80d22f0d85

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

Filesize
534KB

MD5
375d1d9a080b5533da09c98716c40f0d

SHA1
cb1e3e386b935eb999b319c1b6ae0b5b6bedf6ef

SHA256
86ccb2e2b2b1780ec85596c64030ce2525145afa00f9e3db1c3582c4f4afe7e6

SHA512
da8b7b76c532a568d4d2cad2227591b2a372687dd2b47cf369d09e7b7d67b2b6e5976894a8b59c635ebc67d18c10543de316051aad1191641a05a79b80e02b35

Download Submit
memory/2096-10-0x0000000004B60000-0x0000000004C98000-memory.dmp

Filesize
1.2MB

Download
memory/2256-41-0x0000000000AD0000-0x0000000000C08000-memory.dmp

Filesize
1.2MB

Download
memory/2256-62-0x0000000000AD0000-0x0000000000C08000-memory.dmp

Filesize
1.2MB

Download
memory/2304-42-0x000000007241D000-0x0000000072428000-memory.dmp

Filesize
44KB

Download
memory/2304-1-0x000000007241D000-0x0000000072428000-memory.dmp

Filesize
44KB

Download
memory/2304-0-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/2812-58-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2812-60-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2812-59-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/3044-20-0x0000000001150000-0x0000000001288000-memory.dmp

Filesize
1.2MB

Download
memory/3044-40-0x0000000001150000-0x0000000001288000-memory.dmp

Filesize
1.2MB

Download
memory/3044-39-0x0000000002960000-0x0000000002A98000-memory.dmp

Filesize
1.2MB

Download

Analysis

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