agenttesla | 95bb664ebb57018a7c4e89ec8c9a78bc3aab2e580ac415a51e8416e292206afe

General

Target

unzz.exe
Size

315KB
MD5

70a72d5298414f3d38bc10e694a858d9
SHA1

a15a8053add9243366f406145a25f21cd81bd4b2
SHA256

95bb664ebb57018a7c4e89ec8c9a78bc3aab2e580ac415a51e8416e292206afe
SHA512

b10801c6a316cef36baf5968ce02c046d50df2404cad74f2ed82524c011029a55d8d5edcb58931efa738c0cc49d036a3d4b1d26f029130f234cfdd374ea2a0bc
SSDEEP

6144:vYa6Bb6oGPEOuppH26oEMHaseG64X1uD1HWFJzJRNLuFHhLHq:vYLb6FsPR2YMHas9X1BzobK

Score

10^/10

agenttesla collection keylogger spyware stealer trojan

Malware Config

Signatures

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

Executes dropped EXE 2 IoCs

pid	Process
2248	bvuytlmlzl.exe
2624	bvuytlmlzl.exe

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
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
T1081

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	bvuytlmlzl.exe
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	bvuytlmlzl.exe
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	bvuytlmlzl.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
11	api.ipify.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2248 set thread context of 2624	2248	bvuytlmlzl.exe	81

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

System Information Discovery
T1082

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2248	bvuytlmlzl.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2624	bvuytlmlzl.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2624	bvuytlmlzl.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2976 wrote to memory of 2248	2976	unzz.exe	80
PID 2976 wrote to memory of 2248	2976	unzz.exe	80
PID 2976 wrote to memory of 2248	2976	unzz.exe	80
PID 2248 wrote to memory of 2624	2248	bvuytlmlzl.exe	81
PID 2248 wrote to memory of 2624	2248	bvuytlmlzl.exe	81
PID 2248 wrote to memory of 2624	2248	bvuytlmlzl.exe	81
PID 2248 wrote to memory of 2624	2248	bvuytlmlzl.exe	81

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	bvuytlmlzl.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	bvuytlmlzl.exe

C:\Users\Admin\AppData\Local\Temp\unzz.exe
"C:\Users\Admin\AppData\Local\Temp\unzz.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2976
- C:\Users\Admin\AppData\Local\Temp\bvuytlmlzl.exe
  "C:\Users\Admin\AppData\Local\Temp\bvuytlmlzl.exe" C:\Users\Admin\AppData\Local\Temp\fqcloo.m
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:2248
- - C:\Users\Admin\AppData\Local\Temp\bvuytlmlzl.exe
    "C:\Users\Admin\AppData\Local\Temp\bvuytlmlzl.exe"
    3⤵
    - Executes dropped EXE
    - Accesses Microsoft Outlook profiles
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - outlook_office_path
    - outlook_win_path
    PID:2624

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

3

T1081

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\bvuytlmlzl.exe

Filesize
120KB

MD5
ee91396f4e6b4650f6508d12ba854aa8

SHA1
0774ce0ca540f23641ce2e339502e63471446035

SHA256
42dd77c14108c16cef74181bf8655fe7ee99bc425d1d2a17406184560252bfc2

SHA512
ca07b01fadbadc6b2b1cc83e1c8201504330bf415e4976de037e9173d87f6751fe7ab157ab4e05131c66d7144bc7d8c491007a7a84c54e6f8169339622655bb6

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

Filesize
120KB

MD5
ee91396f4e6b4650f6508d12ba854aa8

SHA1
0774ce0ca540f23641ce2e339502e63471446035

SHA256
42dd77c14108c16cef74181bf8655fe7ee99bc425d1d2a17406184560252bfc2

SHA512
ca07b01fadbadc6b2b1cc83e1c8201504330bf415e4976de037e9173d87f6751fe7ab157ab4e05131c66d7144bc7d8c491007a7a84c54e6f8169339622655bb6

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

Filesize
120KB

MD5
ee91396f4e6b4650f6508d12ba854aa8

SHA1
0774ce0ca540f23641ce2e339502e63471446035

SHA256
42dd77c14108c16cef74181bf8655fe7ee99bc425d1d2a17406184560252bfc2

SHA512
ca07b01fadbadc6b2b1cc83e1c8201504330bf415e4976de037e9173d87f6751fe7ab157ab4e05131c66d7144bc7d8c491007a7a84c54e6f8169339622655bb6

Download Submit
C:\Users\Admin\AppData\Local\Temp\fqcloo.m

Filesize
5KB

MD5
0a79d6d44ad6d8e9fc1b72a1876089a5

SHA1
0f75f3875bff04542ad3b787c849867dbd6dc19f

SHA256
9adc776896b7b47d9e5837cc36deea11a09a39171ec60f33704aa255a658d0f3

SHA512
def6d94395f3e4799e297cc910c4398ff5979506cffcced752215adce714f1b450b4424c135d6e9c9ac5ef781bdb2ab877ed98809dc226d7db9d363a7d76406e

Download Submit
C:\Users\Admin\AppData\Local\Temp\rhmmfiom.ub

Filesize
262KB

MD5
0f74daf03becf210f6bd84306fea3e2d

SHA1
543959d78d5cb987f0e30042a2a4c48b491025eb

SHA256
9d1da7017882fb2c0f84c615aa480a00463684dc32e243b8cd492b42204e17ac

SHA512
1f824f5a96e9aef7effbed7532c6212d63fde02d4e347353ac419dd4fe8d2a7bffa7a4be812ee7bc341dc66c51b73c8566334761f779fca82df312dea8214ea4

Download Submit
memory/2624-139-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/2624-140-0x00000000059A0000-0x0000000005F44000-memory.dmp

Filesize
5.6MB

Download
memory/2624-141-0x0000000005280000-0x00000000052E6000-memory.dmp

Filesize
408KB

Download
memory/2624-142-0x0000000006930000-0x00000000069C2000-memory.dmp

Filesize
584KB

Download
memory/2624-143-0x0000000006920000-0x000000000692A000-memory.dmp

Filesize
40KB

Download
memory/2624-144-0x0000000006BD0000-0x0000000006C20000-memory.dmp

Filesize
320KB

Download
memory/2624-145-0x0000000006EE0000-0x00000000070A2000-memory.dmp

Filesize
1.8MB

Download

Analysis

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