nymaim | 15271b6b7836bc5c845d9facc43f97a4503f8f65948ff7d5c0e8aca93d753ac8

General

Target

file.exe
Size

233KB
MD5

5958b7aa607850c6adadedb29dbb9aa9
SHA1

9c55f1242cbe3f63c98d32a7c8c3f7a94693dbe7
SHA256

15271b6b7836bc5c845d9facc43f97a4503f8f65948ff7d5c0e8aca93d753ac8
SHA512

be1c2578771b2ac6043261178a851278754c3bab02a30ae55178cdc9f75c1ab7e8251880ded629fcc246a9cd90c2410d6cbfe16980b8eaa78ac1d0a9fe7a9ab6
SSDEEP

3072:skOI4o++PFyMzlLi174dus0sQ5AQK53gvQADoq0NIVN40tUd2beRi/725898O:TCUo74xIZDolNIDrtY2sij25898

Score

10^/10

nymaim trojan

Malware Config

Extracted

Family

nymaim

C2

208.67.104.97

85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim
Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
1412	Cleaner.exe

Deletes itself 1 IoCs

pid	Process
568	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
584	cmd.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1736	1412	WerFault.exe	32

Kills process with taskkill 1 IoCs

evasion

pid	Process
2000	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1280	file.exe
1280	file.exe
1280	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1412	Cleaner.exe
Token: SeDebugPrivilege	2000	taskkill.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1280 wrote to memory of 584	1280	file.exe	30
PID 1280 wrote to memory of 584	1280	file.exe	30
PID 1280 wrote to memory of 584	1280	file.exe	30
PID 1280 wrote to memory of 584	1280	file.exe	30
PID 584 wrote to memory of 1412	584	cmd.exe	32
PID 584 wrote to memory of 1412	584	cmd.exe	32
PID 584 wrote to memory of 1412	584	cmd.exe	32
PID 584 wrote to memory of 1412	584	cmd.exe	32
PID 1412 wrote to memory of 1736	1412	Cleaner.exe	34
PID 1412 wrote to memory of 1736	1412	Cleaner.exe	34
PID 1412 wrote to memory of 1736	1412	Cleaner.exe	34
PID 1280 wrote to memory of 568	1280	file.exe	35
PID 1280 wrote to memory of 568	1280	file.exe	35
PID 1280 wrote to memory of 568	1280	file.exe	35
PID 1280 wrote to memory of 568	1280	file.exe	35
PID 568 wrote to memory of 2000	568	cmd.exe	37
PID 568 wrote to memory of 2000	568	cmd.exe	37
PID 568 wrote to memory of 2000	568	cmd.exe	37
PID 568 wrote to memory of 2000	568	cmd.exe	37

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1280
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\LQEfoYe18KD8SzD1OkA2ItpRYhg5A\Cleaner.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:584
- - C:\Users\Admin\AppData\Local\Temp\LQEfoYe18KD8SzD1OkA2ItpRYhg5A\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\LQEfoYe18KD8SzD1OkA2ItpRYhg5A\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1412
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 1412 -s 1152
      4⤵
      Program crash
      PID:1736
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "file.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\file.exe" & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:568
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2000

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Web Service

1

T1102

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\LQEfoYe18KD8SzD1OkA2ItpRYhg5A\Bunifu_UI_v1.5.3.dll

Filesize
236KB

MD5
2ecb51ab00c5f340380ecf849291dbcf

SHA1
1a4dffbce2a4ce65495ed79eab42a4da3b660931

SHA256
f1b3e0f2750a9103e46a6a4a34f1cf9d17779725f98042cc2475ec66484801cf

SHA512
e241a48eafcaf99187035f0870d24d74ae97fe84aaadd2591cceea9f64b8223d77cfb17a038a58eadd3b822c5201a6f7494f26eea6f77d95f77f6c668d088e6b

Download Submit
C:\Users\Admin\AppData\Local\Temp\LQEfoYe18KD8SzD1OkA2ItpRYhg5A\Cleaner.exe

Filesize
2.4MB

MD5
79754768767380ef36ef446c6a1709e4

SHA1
2af83a6e20d7efc3119d312534b3f3968d17776e

SHA256
cd6bb6fdf80bec69630a61707383e6430463751463635f35fce42eb97daa7060

SHA512
6f88e9e5f5309ff1e87666a8066333660db37f85031db6dbfb28460700a31d303e140f8dd5fe0e71f2de01706ac7e1317b8a6fd2d992a47bdaa3bb591965f461

Download Submit
C:\Users\Admin\AppData\Local\Temp\LQEfoYe18KD8SzD1OkA2ItpRYhg5A\Cleaner.exe

Filesize
2.4MB

MD5
79754768767380ef36ef446c6a1709e4

SHA1
2af83a6e20d7efc3119d312534b3f3968d17776e

SHA256
cd6bb6fdf80bec69630a61707383e6430463751463635f35fce42eb97daa7060

SHA512
6f88e9e5f5309ff1e87666a8066333660db37f85031db6dbfb28460700a31d303e140f8dd5fe0e71f2de01706ac7e1317b8a6fd2d992a47bdaa3bb591965f461

Download Submit
\Users\Admin\AppData\Local\Temp\LQEfoYe18KD8SzD1OkA2ItpRYhg5A\Cleaner.exe

Filesize
2.4MB

MD5
79754768767380ef36ef446c6a1709e4

SHA1
2af83a6e20d7efc3119d312534b3f3968d17776e

SHA256
cd6bb6fdf80bec69630a61707383e6430463751463635f35fce42eb97daa7060

SHA512
6f88e9e5f5309ff1e87666a8066333660db37f85031db6dbfb28460700a31d303e140f8dd5fe0e71f2de01706ac7e1317b8a6fd2d992a47bdaa3bb591965f461

Download Submit
memory/1280-57-0x0000000000400000-0x0000000000596000-memory.dmp

Filesize
1.6MB

Download
memory/1280-75-0x0000000000400000-0x0000000000596000-memory.dmp

Filesize
1.6MB

Download
memory/1280-68-0x0000000000400000-0x0000000000596000-memory.dmp

Filesize
1.6MB

Download
memory/1280-55-0x00000000006AB000-0x00000000006D1000-memory.dmp

Filesize
152KB

Download
memory/1280-54-0x0000000075811000-0x0000000075813000-memory.dmp

Filesize
8KB

Download
memory/1280-56-0x0000000000220000-0x000000000025F000-memory.dmp

Filesize
252KB

Download
memory/1280-70-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1280-67-0x00000000006AB000-0x00000000006D1000-memory.dmp

Filesize
152KB

Download
memory/1412-64-0x000007FEFB931000-0x000007FEFB933000-memory.dmp

Filesize
8KB

Download
memory/1412-66-0x0000000000410000-0x0000000000452000-memory.dmp

Filesize
264KB

Download
memory/1412-63-0x0000000001160000-0x00000000012D2000-memory.dmp

Filesize
1.4MB

Download

Analysis

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