nymaim | 6a8d00045ecb34a3bf8600d19e659944f5961ebb63139c0e56ac75e51a07db8c

Analysis

max time kernel
137s
max time network
140s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
01/10/2022, 06:39

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General

Target
file.exe
Size 233KB
Sample221001-hel4msfef6
SHA256 6a8d00045ecb34a3bf8600d19e659944f5961ebb63139c0e56ac75e51a07db8c
MD5 a29fa3d9f98cab2bbce049705f3fb961
SHA1 5cd9a25ecc74b1d3c729391e5227ffbeb6f90431
SHA512 1a69f8efd6727681442d357021287f386721681f94155d419769e1c47b4e7434038a9d93438eb58f821d2996f0453fdafd2e2a3d0baf79cdb6ccca69c6d8e028
SSDEEP 3072:Nk2uMtKs9eRNntZ8l/A+rxL0SxDbLLlXrksXbIfTCQU8wBBJz2tcqE8lhK2p2:KWcsUXOYklAC2pU8wmDBE
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim trojan

Malware Config

Extracted

Family

nymaim

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
1936	Cleaner.exe

Deletes itself 1 IoCs

pid	Process
532	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
1104	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
1956	1936	WerFault.exe	31

Kills process with taskkill 1 IoCs

evasion

pid	Process
1672	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1476	file.exe
1476	file.exe
1476	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1936	Cleaner.exe
Token: SeDebugPrivilege	1672	taskkill.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1476 wrote to memory of 1104	1476	file.exe	29
PID 1476 wrote to memory of 1104	1476	file.exe	29
PID 1476 wrote to memory of 1104	1476	file.exe	29
PID 1476 wrote to memory of 1104	1476	file.exe	29
PID 1104 wrote to memory of 1936	1104	cmd.exe	31
PID 1104 wrote to memory of 1936	1104	cmd.exe	31
PID 1104 wrote to memory of 1936	1104	cmd.exe	31
PID 1104 wrote to memory of 1936	1104	cmd.exe	31
PID 1936 wrote to memory of 1956	1936	Cleaner.exe	33
PID 1936 wrote to memory of 1956	1936	Cleaner.exe	33
PID 1936 wrote to memory of 1956	1936	Cleaner.exe	33
PID 1476 wrote to memory of 532	1476	file.exe	34
PID 1476 wrote to memory of 532	1476	file.exe	34
PID 1476 wrote to memory of 532	1476	file.exe	34
PID 1476 wrote to memory of 532	1476	file.exe	34
PID 532 wrote to memory of 1672	532	cmd.exe	36
PID 532 wrote to memory of 1672	532	cmd.exe	36
PID 532 wrote to memory of 1672	532	cmd.exe	36
PID 532 wrote to memory of 1672	532	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:1476
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\LQFjX5R5SR783pN0wqTuwJ\Cleaner.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1104
- - C:\Users\Admin\AppData\Local\Temp\LQFjX5R5SR783pN0wqTuwJ\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\LQFjX5R5SR783pN0wqTuwJ\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1936
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 1936 -s 1148
      4⤵
      Program crash
      PID:1956
- 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:532
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1672

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Web Service

T1102

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

Bunifu_UI_v1.5.3.dll

Path C:\Users\Admin\AppData\Local\Temp\LQFjX5R5SR783pN0wqTuwJ\Bunifu_UI_v1.5.3.dll
Size 236KB
SHA256 f1b3e0f2750a9103e46a6a4a34f1cf9d17779725f98042cc2475ec66484801cf
MD5 2ecb51ab00c5f340380ecf849291dbcf
SHA1 1a4dffbce2a4ce65495ed79eab42a4da3b660931
SHA512 e241a48eafcaf99187035f0870d24d74ae97fe84aaadd2591cceea9f64b8223d77cfb17a038a58eadd3b822c5201a6f7494f26eea6f77d95f77f6c668d088e6b
SSDEEP 6144:SIQpxILDXGGMO7Ice9C5kQw2hWHcHTykhb:SIQpxILDXGGlET9n/cHG
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\LQFjX5R5SR783pN0wqTuwJ\Cleaner.exe
Size 4.0MB
SHA256 f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7
MD5 a1a19faf0af29841daeeaad999d899bd
SHA1 f67b9afdab167d5bcc544358b0e7fd2858784508
SHA512 a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8
SSDEEP 49152:M/PD/DL/D9CuZrr2h60qPGPD/jL/jdCuZrL2BaUKPmPD/jL/jdCuZrL2BaUKPs:M3D///UUrP6D/f/UULPaD/f/UULPs
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\LQFjX5R5SR783pN0wqTuwJ\Cleaner.exe
Size 4.0MB
SHA256 f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7
MD5 a1a19faf0af29841daeeaad999d899bd
SHA1 f67b9afdab167d5bcc544358b0e7fd2858784508
SHA512 a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8
SSDEEP 49152:M/PD/DL/D9CuZrr2h60qPGPD/jL/jdCuZrL2BaUKPmPD/jL/jdCuZrL2BaUKPs:M3D///UUrP6D/f/UULPaD/f/UULPs
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path \Users\Admin\AppData\Local\Temp\LQFjX5R5SR783pN0wqTuwJ\Cleaner.exe
Size 4.0MB
SHA256 f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7
MD5 a1a19faf0af29841daeeaad999d899bd
SHA1 f67b9afdab167d5bcc544358b0e7fd2858784508
SHA512 a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8
SSDEEP 49152:M/PD/DL/D9CuZrr2h60qPGPD/jL/jdCuZrL2BaUKPmPD/jL/jdCuZrL2BaUKPs:M3D///UUrP6D/f/UULPaD/f/UULPs
MD5 SHA1 SHA512 SSDEEP

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memory/1476-64-0x0000000000400000-0x0000000000597000-memory.dmp

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memory/1476-55-0x00000000002CD000-0x00000000002F4000-memory.dmp

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memory/1476-57-0x0000000000400000-0x0000000000597000-memory.dmp

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memory/1476-75-0x0000000000400000-0x0000000000597000-memory.dmp

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memory/1476-54-0x0000000074FB1000-0x0000000074FB3000-memory.dmp

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memory/1476-74-0x00000000002CD000-0x00000000002F4000-memory.dmp

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memory/1476-56-0x00000000001B0000-0x00000000001EF000-memory.dmp

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memory/1476-69-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1936-67-0x0000000000300000-0x0000000000342000-memory.dmp

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memory/1936-65-0x000007FEFBD71000-0x000007FEFBD73000-memory.dmp

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memory/1936-63-0x0000000001330000-0x0000000001488000-memory.dmp

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