agenttesla | de932fd5a90b8d80a6b6223d46b905f3dc911ef96e5ffb084386f614f2d2dd8a

General

Target

de932fd5a90b8d80a6b6223d46b905f3dc911ef96e5ffb084386f614f2d2dd8a.xlam
Size

732KB
MD5

81569ed8fd1a3ae9141e1ca9ebc6e3f1
SHA1

0b88ae280590d423d0970d5afcf9b7ab984d2c27
SHA256

de932fd5a90b8d80a6b6223d46b905f3dc911ef96e5ffb084386f614f2d2dd8a
SHA512

fc2071d62453967631389ffbddf6ea358d1f09d67d2259b26ef858d303ac2a0ae1094283110960abdd288744e6d24d8f037445066a44ddcd11bcc0fb24c9bbd1
SSDEEP

12288:OZRNsgqnTxkQlWaCMSVKptJKpeKBvMWZqyQ/F+lqCnsxcMFRCdOk:6RvqntksCCtJVKVMWk+Dsx4

Score

10^/10

agenttesla discovery keylogger spyware stealer trojan upx

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: ftp
Host:
ftp://ftp.stingatoareincendii.ro
Port:
21
Username:
[email protected]
Password:
3.*RYhlG)lkA

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
5	1948	EQNEDT32.EXE

Downloads MZ/PE file 1 IoCs

flow	pid	Process
5	1948	EQNEDT32.EXE

Executes dropped EXE 1 IoCs

pid	Process
2876	exhwisjk.exe

Loads dropped DLL 1 IoCs

pid	Process
1948	EQNEDT32.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
6	ip-api.com

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/memory/2876-28-0x0000000000340000-0x000000000047F000-memory.dmp	autoit_exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2876 set thread context of 2816	2876	exhwisjk.exe	34

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x00070000000173a3-7.dat	upx
behavioral1/memory/2876-11-0x0000000000340000-0x000000000047F000-memory.dmp	upx
behavioral1/memory/1948-9-0x0000000006890000-0x00000000069CF000-memory.dmp	upx
behavioral1/memory/2876-28-0x0000000000340000-0x000000000047F000-memory.dmp	upx

System Location Discovery: System Language Discovery 1 TTPs 4 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	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	EQNEDT32.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	exhwisjk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegSvcs.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
1948	EQNEDT32.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2076	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2816	RegSvcs.exe
2816	RegSvcs.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2876	exhwisjk.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2816	RegSvcs.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
2876	exhwisjk.exe
2876	exhwisjk.exe

Suspicious use of SendNotifyMessage 2 IoCs

pid	Process
2876	exhwisjk.exe
2876	exhwisjk.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2076	EXCEL.EXE
2076	EXCEL.EXE
2076	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1948 wrote to memory of 2876	1948	EQNEDT32.EXE	33
PID 1948 wrote to memory of 2876	1948	EQNEDT32.EXE	33
PID 1948 wrote to memory of 2876	1948	EQNEDT32.EXE	33
PID 1948 wrote to memory of 2876	1948	EQNEDT32.EXE	33
PID 2876 wrote to memory of 2816	2876	exhwisjk.exe	34
PID 2876 wrote to memory of 2816	2876	exhwisjk.exe	34
PID 2876 wrote to memory of 2816	2876	exhwisjk.exe	34
PID 2876 wrote to memory of 2816	2876	exhwisjk.exe	34
PID 2876 wrote to memory of 2816	2876	exhwisjk.exe	34
PID 2876 wrote to memory of 2816	2876	exhwisjk.exe	34
PID 2876 wrote to memory of 2816	2876	exhwisjk.exe	34
PID 2876 wrote to memory of 2816	2876	exhwisjk.exe	34

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\de932fd5a90b8d80a6b6223d46b905f3dc911ef96e5ffb084386f614f2d2dd8a.xlam
1⤵
- System Location Discovery: System Language Discovery
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:2076

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:1948
- C:\Users\Admin\AppData\Local\Temp\exhwisjk.exe
  C:\Users\Admin\AppData\Local\Temp\exhwisjk.exe
  2⤵
  - 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:2876
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
    C:\Users\Admin\AppData\Local\Temp\exhwisjk.exe
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2816

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\exhwisjk.exe

Filesize
548KB

MD5
ad8751d43980aa9ea13975c9d7262a4d

SHA1
21f2bdedea7b043db2db96b7889eca6bafd99f51

SHA256
7ee3a9afbaff41655fc0c37db9365aa25b3547ca1e728d02779c6214f8a67868

SHA512
92be92e7f7b783a88a6eab6714dec4991f18aabec8eaf97391de61e98718399a985b63891d6d3623661a1e7194d98e9cc8f2114481d8305fd79d58a9582acb9c

Download Submit
memory/1948-9-0x0000000006890000-0x00000000069CF000-memory.dmp

Filesize
1.2MB

Download
memory/2076-1-0x0000000071DFD000-0x0000000071E08000-memory.dmp

Filesize
44KB

Download
memory/2076-0-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/2076-29-0x0000000071DFD000-0x0000000071E08000-memory.dmp

Filesize
44KB

Download
memory/2816-24-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2816-27-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2816-26-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2876-11-0x0000000000340000-0x000000000047F000-memory.dmp

Filesize
1.2MB

Download
memory/2876-28-0x0000000000340000-0x000000000047F000-memory.dmp

Filesize
1.2MB

Download

Analysis

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