nymaim | b171ed213578fd044444acd7a8679d6867141007cd00d01d6d391685f5e253ae

Analysis

max time kernel
53s
max time network
56s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
07/10/2022, 18:00

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General

Target
file.exe
Size 396KB
Sample221007-wla7lsdad7
SHA256 b171ed213578fd044444acd7a8679d6867141007cd00d01d6d391685f5e253ae
MD5 756cee17400863b7414059927e0d5102
SHA1 ea76ef4c541f7cc8684d6ec82494574290d81e5f
SHA512 7df9379d5e8d380399be9f29378ee6778777b5093546fd950d5121274f295e18c6af15934d20ec2a8646c37c846c2d878cab3351fa9242884112859fa72be3c1
SSDEEP 12288:og/rmV9udkCar/AsQK6+NUd/nqMazAWeunn70:oRLekCarpQKLNU/nXaUM
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

Executes dropped EXE 1 IoCs

pid	Process
1256	6HcbuG4cr.exe

Deletes itself 1 IoCs

pid	Process
920	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
1980	file.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

pid	Process
1756	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1980	file.exe
1980	file.exe
1980	file.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1756	taskkill.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1980 wrote to memory of 1256	1980	file.exe	30
PID 1980 wrote to memory of 1256	1980	file.exe	30
PID 1980 wrote to memory of 1256	1980	file.exe	30
PID 1980 wrote to memory of 1256	1980	file.exe	30
PID 1980 wrote to memory of 920	1980	file.exe	31
PID 1980 wrote to memory of 920	1980	file.exe	31
PID 1980 wrote to memory of 920	1980	file.exe	31
PID 1980 wrote to memory of 920	1980	file.exe	31
PID 920 wrote to memory of 1756	920	cmd.exe	33
PID 920 wrote to memory of 1756	920	cmd.exe	33
PID 920 wrote to memory of 1756	920	cmd.exe	33
PID 920 wrote to memory of 1756	920	cmd.exe	33

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1980
- C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\6HcbuG4cr.exe
  2⤵
  - Executes dropped EXE
  PID:1256
- 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:920
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1756

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

6HcbuG4cr.exe

Path C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\6HcbuG4cr.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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6HcbuG4cr.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\6HcbuG4cr.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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memory/1980-55-0x000000000060B000-0x000000000063C000-memory.dmp

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memory/1980-54-0x0000000075981000-0x0000000075983000-memory.dmp

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memory/1980-61-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1980-65-0x000000000060B000-0x000000000063C000-memory.dmp

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memory/1980-66-0x0000000000400000-0x0000000000468000-memory.dmp

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memory/1980-57-0x0000000000400000-0x0000000000468000-memory.dmp

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memory/1980-68-0x000000000060B000-0x000000000063C000-memory.dmp

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memory/1980-69-0x0000000000400000-0x0000000000468000-memory.dmp

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memory/1980-56-0x0000000000240000-0x0000000000293000-memory.dmp

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