nymaim | 5eb0b4b21107152dfbfaed3a9c61233233d3cab8a650cbb88dcfc34cff1f99ec

Analysis

max time kernel
44s
max time network
49s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
25-11-2022 06:56

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General

Target

1fe8e5f03a721f0a37fbbf0ea5779d6d.exe
Size

275KB
MD5

1fe8e5f03a721f0a37fbbf0ea5779d6d
SHA1

ef876bed0fa429ee30b5395b69a89ad4d74a3fcc
SHA256

5eb0b4b21107152dfbfaed3a9c61233233d3cab8a650cbb88dcfc34cff1f99ec
SHA512

35331dc01b743553abc6e17c9aced57fa28d5bca9a0292b6ec5fc6f60574b8710605d7a4fa34a7331847dd4c9349ae1017d44aba975358612988a8a2c49cadac
SSDEEP

6144:+FU/LHPiDaqkg7kKCfVWkF6N+k17tzTpq:+FYjiDaTgvsu7hT

Score

10^/10

nymaim trojan

Malware Config

Extracted

Family

nymaim

45.139.105.171

85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim
Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1776 cmd.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Kills process with taskkill 1 IoCs
evasion

Processes:

taskkill.exe

pid process

296 taskkill.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

taskkill.exe

description pid process

Token: SeDebugPrivilege 296 taskkill.exe

pid	process
1776	cmd.exe

pid	process
296	taskkill.exe

description	pid	process
Token: SeDebugPrivilege	296	taskkill.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

1fe8e5f03a721f0a37fbbf0ea5779d6d.execmd.exe

description	pid	process	target process
PID 1484 wrote to memory of 1776	1484	1fe8e5f03a721f0a37fbbf0ea5779d6d.exe	cmd.exe
PID 1484 wrote to memory of 1776	1484	1fe8e5f03a721f0a37fbbf0ea5779d6d.exe	cmd.exe
PID 1484 wrote to memory of 1776	1484	1fe8e5f03a721f0a37fbbf0ea5779d6d.exe	cmd.exe
PID 1484 wrote to memory of 1776	1484	1fe8e5f03a721f0a37fbbf0ea5779d6d.exe	cmd.exe
PID 1776 wrote to memory of 296	1776	cmd.exe	taskkill.exe
PID 1776 wrote to memory of 296	1776	cmd.exe	taskkill.exe
PID 1776 wrote to memory of 296	1776	cmd.exe	taskkill.exe
PID 1776 wrote to memory of 296	1776	cmd.exe	taskkill.exe

C:\Users\Admin\AppData\Local\Temp\1fe8e5f03a721f0a37fbbf0ea5779d6d.exe
"C:\Users\Admin\AppData\Local\Temp\1fe8e5f03a721f0a37fbbf0ea5779d6d.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1484

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c taskkill /im "1fe8e5f03a721f0a37fbbf0ea5779d6d.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\1fe8e5f03a721f0a37fbbf0ea5779d6d.exe" & exit
2⤵
- Deletes itself
- Suspicious use of WriteProcessMemory
PID:1776

C:\Windows\SysWOW64\taskkill.exe
taskkill /im "1fe8e5f03a721f0a37fbbf0ea5779d6d.exe" /f
3⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:296

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/296-61-0x0000000000000000-mapping.dmp

Download
memory/1484-54-0x0000000076BA1000-0x0000000076BA3000-memory.dmp

Filesize
8KB

Download
memory/1484-55-0x00000000002CB000-0x00000000002F2000-memory.dmp

Filesize
156KB

Download
memory/1484-56-0x00000000001B0000-0x00000000001F0000-memory.dmp

Filesize
256KB

Download
memory/1484-57-0x0000000000400000-0x0000000000663000-memory.dmp

Filesize
2.4MB

Download
memory/1484-59-0x00000000002CB000-0x00000000002F2000-memory.dmp

Filesize
156KB

Download
memory/1484-60-0x0000000000400000-0x0000000000663000-memory.dmp

Filesize
2.4MB

Download
memory/1776-58-0x0000000000000000-mapping.dmp

Download