nymaim | 7ed19db28d8c8a77f137e6e0cd14371e0983b41ebd310ef27f427ed82a2ad71e

General

Target

file.exe
Size

284KB
MD5

7c8fa3a31691bc212a3903c922efbabc
SHA1

7e5c6794c3973a4407574e3a29bd4a4200805f69
SHA256

7ed19db28d8c8a77f137e6e0cd14371e0983b41ebd310ef27f427ed82a2ad71e
SHA512

41ea1ce1bc14d607c71efa55917ddb3611bf518250298fc098bcebeb21af627bcb993e37688218a23cbd4feafeabee121f5382c16dd6715430005f551bc0e973
SSDEEP

3072:3d+gsLMzdt9gN5+zrb5NYL2ae/XXbjcvoDxjHbP1PKYjZoVhawPCJTgXUBV8/Pkw:sLwX/1NYa/Xbjcv+JbP1PfloVhLPC

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

Processes:

Cleaner.exe

pid process

1764 Cleaner.exe
Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

696 cmd.exe
Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

1824 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

Processes:

WerFault.exe

pid pid_target process target process

1632 1764 WerFault.exe Cleaner.exe
Kills process with taskkill 1 IoCs
evasion

Processes:

taskkill.exe

pid process

1636 taskkill.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

file.exe

pid process

752 file.exe
752 file.exe
752 file.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Cleaner.exetaskkill.exe

description pid process

Token: SeDebugPrivilege 1764 Cleaner.exe
Token: SeDebugPrivilege 1636 taskkill.exe

pid	process
1764	Cleaner.exe

pid	process
696	cmd.exe

pid	process
1824	cmd.exe

pid	pid_target	process	target process
1632	1764	WerFault.exe	Cleaner.exe

pid	process
1636	taskkill.exe

pid	process
752	file.exe
752	file.exe
752	file.exe

description	pid	process
Token: SeDebugPrivilege	1764	Cleaner.exe
Token: SeDebugPrivilege	1636	taskkill.exe

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

file.execmd.exeCleaner.execmd.exe

description	pid	process	target process
PID 752 wrote to memory of 1824	752	file.exe	cmd.exe
PID 752 wrote to memory of 1824	752	file.exe	cmd.exe
PID 752 wrote to memory of 1824	752	file.exe	cmd.exe
PID 752 wrote to memory of 1824	752	file.exe	cmd.exe
PID 1824 wrote to memory of 1764	1824	cmd.exe	Cleaner.exe
PID 1824 wrote to memory of 1764	1824	cmd.exe	Cleaner.exe
PID 1824 wrote to memory of 1764	1824	cmd.exe	Cleaner.exe
PID 1824 wrote to memory of 1764	1824	cmd.exe	Cleaner.exe
PID 1764 wrote to memory of 1632	1764	Cleaner.exe	WerFault.exe
PID 1764 wrote to memory of 1632	1764	Cleaner.exe	WerFault.exe
PID 1764 wrote to memory of 1632	1764	Cleaner.exe	WerFault.exe
PID 752 wrote to memory of 696	752	file.exe	cmd.exe
PID 752 wrote to memory of 696	752	file.exe	cmd.exe
PID 752 wrote to memory of 696	752	file.exe	cmd.exe
PID 752 wrote to memory of 696	752	file.exe	cmd.exe
PID 696 wrote to memory of 1636	696	cmd.exe	taskkill.exe
PID 696 wrote to memory of 1636	696	cmd.exe	taskkill.exe
PID 696 wrote to memory of 1636	696	cmd.exe	taskkill.exe
PID 696 wrote to memory of 1636	696	cmd.exe	taskkill.exe

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:752

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\fm0WIMdN8is\Cleaner.exe"
2⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1824

C:\Users\Admin\AppData\Local\Temp\fm0WIMdN8is\Cleaner.exe
"C:\Users\Admin\AppData\Local\Temp\fm0WIMdN8is\Cleaner.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1764

C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -u -p 1764 -s 1152
4⤵
- Program crash
PID:1632

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:696

C:\Windows\SysWOW64\taskkill.exe
taskkill /im "file.exe" /f
3⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:1636

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Web Service

1

T1102

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\fm0WIMdN8is\Bunifu_UI_v1.5.3.dll
Filesize
236KB

MD5
2ecb51ab00c5f340380ecf849291dbcf

SHA1
1a4dffbce2a4ce65495ed79eab42a4da3b660931

SHA256
f1b3e0f2750a9103e46a6a4a34f1cf9d17779725f98042cc2475ec66484801cf

SHA512
e241a48eafcaf99187035f0870d24d74ae97fe84aaadd2591cceea9f64b8223d77cfb17a038a58eadd3b822c5201a6f7494f26eea6f77d95f77f6c668d088e6b

Download Submit
C:\Users\Admin\AppData\Local\Temp\fm0WIMdN8is\Cleaner.exe
Filesize
3.8MB

MD5
23c1e8f48ec06960bbd9969c1f404192

SHA1
b9384151eb3f2dbd095fa273c248722e1cc74ea3

SHA256
301d9c55653f6cd8211aafdaf130092cb7ef8ea2e54db2db97153c1c8abf272c

SHA512
f572e3a0ad58b3a1ed22db00b05a3909f7f53f70b84ab736e2dd6ddc54d8781fcffe4a9b33b0dd2836d438a1982b944426fe4ed01bd866bd77e20046220f2b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\fm0WIMdN8is\Cleaner.exe
Filesize
3.8MB

MD5
23c1e8f48ec06960bbd9969c1f404192

SHA1
b9384151eb3f2dbd095fa273c248722e1cc74ea3

SHA256
301d9c55653f6cd8211aafdaf130092cb7ef8ea2e54db2db97153c1c8abf272c

SHA512
f572e3a0ad58b3a1ed22db00b05a3909f7f53f70b84ab736e2dd6ddc54d8781fcffe4a9b33b0dd2836d438a1982b944426fe4ed01bd866bd77e20046220f2b5b

Download Submit
\Users\Admin\AppData\Local\Temp\fm0WIMdN8is\Cleaner.exe
Filesize
3.8MB

MD5
23c1e8f48ec06960bbd9969c1f404192

SHA1
b9384151eb3f2dbd095fa273c248722e1cc74ea3

SHA256
301d9c55653f6cd8211aafdaf130092cb7ef8ea2e54db2db97153c1c8abf272c

SHA512
f572e3a0ad58b3a1ed22db00b05a3909f7f53f70b84ab736e2dd6ddc54d8781fcffe4a9b33b0dd2836d438a1982b944426fe4ed01bd866bd77e20046220f2b5b

Download Submit
memory/696-74-0x0000000000000000-mapping.dmp

Download
memory/752-57-0x0000000000400000-0x00000000005A1000-memory.dmp

Filesize
1.6MB

Download
memory/752-75-0x0000000000400000-0x00000000005A1000-memory.dmp

Filesize
1.6MB

Download
memory/752-67-0x000000000067B000-0x00000000006A1000-memory.dmp

Filesize
152KB

Download
memory/752-56-0x0000000000220000-0x000000000025F000-memory.dmp

Filesize
252KB

Download
memory/752-70-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/752-54-0x0000000075241000-0x0000000075243000-memory.dmp

Filesize
8KB

Download
memory/752-55-0x000000000067B000-0x00000000006A1000-memory.dmp

Filesize
152KB

Download
memory/752-68-0x0000000000400000-0x00000000005A1000-memory.dmp

Filesize
1.6MB

Download
memory/1632-69-0x0000000000000000-mapping.dmp

Download
memory/1636-76-0x0000000000000000-mapping.dmp

Download
memory/1764-66-0x0000000000450000-0x0000000000492000-memory.dmp

Filesize
264KB

Download
memory/1764-64-0x000007FEFBE61000-0x000007FEFBE63000-memory.dmp

Filesize
8KB

Download
memory/1764-63-0x00000000011C0000-0x0000000001340000-memory.dmp

Filesize
1.5MB

Download
memory/1764-60-0x0000000000000000-mapping.dmp

Download
memory/1824-58-0x0000000000000000-mapping.dmp

Download

Analysis

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