nymaim | 5de800d4d3d6e34f79664306615eab7d3db7d25a232747b05c745cc3499fc138

General

Target

file.exe
Size

233KB
MD5

ccd6d61afefa2537852078ec885c1347
SHA1

edc0ca9b0899a73cfe60d257546a94ed4d52925d
SHA256

5de800d4d3d6e34f79664306615eab7d3db7d25a232747b05c745cc3499fc138
SHA512

3bd8760f1b06c522ec460960d043183968fd39ea2c7ab4ed8766d0ebdf278d7b1593cafd74b0c8e65652c53f0a5c3b054d2f249261f141767eb57d5790f9f44c
SSDEEP

3072:fRprnKCiphfMBAqDGMPPd0JASOOfwVbH2HYopr6pSpRkgqnzJEH4fjpO:JQCig+MPPdIASOOfwVb6Gsdqn+H47p

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
1568	Cleaner.exe

Deletes itself 1 IoCs

pid	Process
360	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
1716	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
1112	1568	WerFault.exe	31

Kills process with taskkill 1 IoCs

evasion

pid	Process
1864	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1824	file.exe
1824	file.exe
1824	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1568	Cleaner.exe
Token: SeDebugPrivilege	1864	taskkill.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1824 wrote to memory of 1716	1824	file.exe	29
PID 1824 wrote to memory of 1716	1824	file.exe	29
PID 1824 wrote to memory of 1716	1824	file.exe	29
PID 1824 wrote to memory of 1716	1824	file.exe	29
PID 1716 wrote to memory of 1568	1716	cmd.exe	31
PID 1716 wrote to memory of 1568	1716	cmd.exe	31
PID 1716 wrote to memory of 1568	1716	cmd.exe	31
PID 1716 wrote to memory of 1568	1716	cmd.exe	31
PID 1568 wrote to memory of 1112	1568	Cleaner.exe	33
PID 1568 wrote to memory of 1112	1568	Cleaner.exe	33
PID 1568 wrote to memory of 1112	1568	Cleaner.exe	33
PID 1824 wrote to memory of 360	1824	file.exe	34
PID 1824 wrote to memory of 360	1824	file.exe	34
PID 1824 wrote to memory of 360	1824	file.exe	34
PID 1824 wrote to memory of 360	1824	file.exe	34
PID 360 wrote to memory of 1864	360	cmd.exe	36
PID 360 wrote to memory of 1864	360	cmd.exe	36
PID 360 wrote to memory of 1864	360	cmd.exe	36
PID 360 wrote to memory of 1864	360	cmd.exe	36

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:1824
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\hBwhoNa6\Cleaner.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1716
- - C:\Users\Admin\AppData\Local\Temp\hBwhoNa6\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\hBwhoNa6\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1568
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 1568 -s 1144
      4⤵
      Program crash
      PID:1112
- 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:360
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1864

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\hBwhoNa6\Bunifu_UI_v1.5.3.dll

Filesize
236KB

MD5
2ecb51ab00c5f340380ecf849291dbcf

SHA1
1a4dffbce2a4ce65495ed79eab42a4da3b660931

SHA256
f1b3e0f2750a9103e46a6a4a34f1cf9d17779725f98042cc2475ec66484801cf

SHA512
e241a48eafcaf99187035f0870d24d74ae97fe84aaadd2591cceea9f64b8223d77cfb17a038a58eadd3b822c5201a6f7494f26eea6f77d95f77f6c668d088e6b

Download Submit
C:\Users\Admin\AppData\Local\Temp\hBwhoNa6\Cleaner.exe

Filesize
2.4MB

MD5
79754768767380ef36ef446c6a1709e4

SHA1
2af83a6e20d7efc3119d312534b3f3968d17776e

SHA256
cd6bb6fdf80bec69630a61707383e6430463751463635f35fce42eb97daa7060

SHA512
6f88e9e5f5309ff1e87666a8066333660db37f85031db6dbfb28460700a31d303e140f8dd5fe0e71f2de01706ac7e1317b8a6fd2d992a47bdaa3bb591965f461

Download Submit
C:\Users\Admin\AppData\Local\Temp\hBwhoNa6\Cleaner.exe

Filesize
2.4MB

MD5
79754768767380ef36ef446c6a1709e4

SHA1
2af83a6e20d7efc3119d312534b3f3968d17776e

SHA256
cd6bb6fdf80bec69630a61707383e6430463751463635f35fce42eb97daa7060

SHA512
6f88e9e5f5309ff1e87666a8066333660db37f85031db6dbfb28460700a31d303e140f8dd5fe0e71f2de01706ac7e1317b8a6fd2d992a47bdaa3bb591965f461

Download Submit
\Users\Admin\AppData\Local\Temp\hBwhoNa6\Cleaner.exe

Filesize
2.4MB

MD5
79754768767380ef36ef446c6a1709e4

SHA1
2af83a6e20d7efc3119d312534b3f3968d17776e

SHA256
cd6bb6fdf80bec69630a61707383e6430463751463635f35fce42eb97daa7060

SHA512
6f88e9e5f5309ff1e87666a8066333660db37f85031db6dbfb28460700a31d303e140f8dd5fe0e71f2de01706ac7e1317b8a6fd2d992a47bdaa3bb591965f461

Download Submit
memory/1568-66-0x00000000021E0000-0x0000000002222000-memory.dmp

Filesize
264KB

Download
memory/1568-63-0x0000000000180000-0x00000000002F2000-memory.dmp

Filesize
1.4MB

Download
memory/1568-64-0x000007FEFB5C1000-0x000007FEFB5C3000-memory.dmp

Filesize
8KB

Download
memory/1824-68-0x0000000000400000-0x0000000000596000-memory.dmp

Filesize
1.6MB

Download
memory/1824-55-0x0000000000A1B000-0x0000000000A42000-memory.dmp

Filesize
156KB

Download
memory/1824-67-0x0000000000A1B000-0x0000000000A42000-memory.dmp

Filesize
156KB

Download
memory/1824-57-0x0000000000400000-0x0000000000596000-memory.dmp

Filesize
1.6MB

Download
memory/1824-54-0x0000000075571000-0x0000000075573000-memory.dmp

Filesize
8KB

Download
memory/1824-70-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1824-56-0x00000000003B0000-0x00000000003EF000-memory.dmp

Filesize
252KB

Download
memory/1824-75-0x0000000000A1B000-0x0000000000A42000-memory.dmp

Filesize
156KB

Download
memory/1824-76-0x0000000000400000-0x0000000000596000-memory.dmp

Filesize
1.6MB

Download

Analysis

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