nymaim | 56ebf309396831cb690df4a26a8a99f3851b07d156d3a2b2b1889afefda8c8ac

General

Target

file.exe
Size

1.2MB
MD5

d692724a60a41ea1c91fe6e6d7333f7d
SHA1

6788fefc01d8b69f0a58dd8ea8008845a7c8804e
SHA256

56ebf309396831cb690df4a26a8a99f3851b07d156d3a2b2b1889afefda8c8ac
SHA512

df345054e7dccec36a119c7f7df5397e80a5931e2f129c8d84f4cfd2284b758e58a380a7d9efea43bf6fc2ba4a34fa3fc4c79786f12de15ac004a2caed7a82d0
SSDEEP

24576:R206XpZQ58U3DegBFX1urU4Lum6HpzDekNDeOLTi/Skl5l/Hlc:R2xZi8kDtD1MU4LuXTDTLTcl50

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

C2

45.139.105.171

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 3 IoCs

pid	Process
4756	file.tmp
4716	JitFiles135.exe
3524	3jxxfshQ06.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	JitFiles135.exe

Loads dropped DLL 1 IoCs

pid	Process
4756	file.tmp

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Program Files directory 17 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Split Files\language\is-UTMK1.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-A96D9.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-93NKM.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-QBCIO.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\Split Files\unins000.dat	file.tmp
File opened for modification	C:\Program Files (x86)\Split Files\JitFiles135.exe	file.tmp
File created	C:\Program Files (x86)\Split Files\unins000.dat	file.tmp
File created	C:\Program Files (x86)\Split Files\is-ILJPD.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-KEFBA.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-UTV6G.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-L6MOQ.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-6NEKP.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-3CR65.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-0G79M.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-V6TE7.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-74UT9.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-BC5FL.tmp	file.tmp

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
856	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4716	JitFiles135.exe
4716	JitFiles135.exe
4716	JitFiles135.exe
4716	JitFiles135.exe
4716	JitFiles135.exe
4716	JitFiles135.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	856	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 5068 wrote to memory of 4756	5068	file.exe	81
PID 5068 wrote to memory of 4756	5068	file.exe	81
PID 5068 wrote to memory of 4756	5068	file.exe	81
PID 4756 wrote to memory of 4716	4756	file.tmp	82
PID 4756 wrote to memory of 4716	4756	file.tmp	82
PID 4756 wrote to memory of 4716	4756	file.tmp	82
PID 4716 wrote to memory of 3524	4716	JitFiles135.exe	83
PID 4716 wrote to memory of 3524	4716	JitFiles135.exe	83
PID 4716 wrote to memory of 3524	4716	JitFiles135.exe	83
PID 4716 wrote to memory of 1360	4716	JitFiles135.exe	91
PID 4716 wrote to memory of 1360	4716	JitFiles135.exe	91
PID 4716 wrote to memory of 1360	4716	JitFiles135.exe	91
PID 1360 wrote to memory of 856	1360	cmd.exe	93
PID 1360 wrote to memory of 856	1360	cmd.exe	93
PID 1360 wrote to memory of 856	1360	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:5068
- C:\Users\Admin\AppData\Local\Temp\is-JH4T1.tmp\file.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-JH4T1.tmp\file.tmp" /SL5="$70034,1042722,51712,C:\Users\Admin\AppData\Local\Temp\file.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4756
- - C:\Program Files (x86)\Split Files\JitFiles135.exe
    "C:\Program Files (x86)\Split Files\JitFiles135.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4716
  - - C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\3jxxfshQ06.exe
      4⤵
      Executes dropped EXE
      PID:3524
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "JitFiles135.exe" /f & erase "C:\Program Files (x86)\Split Files\JitFiles135.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1360
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "JitFiles135.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:856

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Program Files (x86)\Split Files\JitFiles135.exe

Filesize
1.8MB

MD5
37b801dac66e9e3a80e0826dd9d7c0a6

SHA1
d56277db1517e1b31895cd2595aafb2cc0d07fd1

SHA256
e71f5d84c19304642a9329b925a2c1fb92113ce956d4b0bd259da53bf3daf15f

SHA512
27ddd31f46e6f617e08158466ee17e1a5da89b831560e2e16612da26adc2ff2966c115e07872c1efec1d67795fd012a62cef5236b1bf483ab6e9d495b9a74619

Download Submit
C:\Program Files (x86)\Split Files\JitFiles135.exe

Filesize
1.8MB

MD5
37b801dac66e9e3a80e0826dd9d7c0a6

SHA1
d56277db1517e1b31895cd2595aafb2cc0d07fd1

SHA256
e71f5d84c19304642a9329b925a2c1fb92113ce956d4b0bd259da53bf3daf15f

SHA512
27ddd31f46e6f617e08158466ee17e1a5da89b831560e2e16612da26adc2ff2966c115e07872c1efec1d67795fd012a62cef5236b1bf483ab6e9d495b9a74619

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-JH4T1.tmp\file.tmp

Filesize
692KB

MD5
7958276140c2d23a53ae8a1f2aa20771

SHA1
fd6b462e6d69efff1d57575b084212c8e57367aa

SHA256
30893d74dace626f98a12862d02b582ecec4671c338f8638f637e53a700e5dd1

SHA512
772c61d78659ce76c4c7ea36bf092958b212414a874434e06272c709d221e74855a388273bcc677e94dff61cd593aba7b74368f716784e68a40516d28da9477b

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-JH4T1.tmp\file.tmp

Filesize
692KB

MD5
7958276140c2d23a53ae8a1f2aa20771

SHA1
fd6b462e6d69efff1d57575b084212c8e57367aa

SHA256
30893d74dace626f98a12862d02b582ecec4671c338f8638f637e53a700e5dd1

SHA512
772c61d78659ce76c4c7ea36bf092958b212414a874434e06272c709d221e74855a388273bcc677e94dff61cd593aba7b74368f716784e68a40516d28da9477b

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-R99N1.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\3jxxfshQ06.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\3jxxfshQ06.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/856-154-0x0000000000000000-mapping.dmp

Download
memory/1360-153-0x0000000000000000-mapping.dmp

Download
memory/3524-144-0x0000000000000000-mapping.dmp

Download
memory/4716-143-0x0000000000400000-0x00000000013C6000-memory.dmp

Filesize
15.8MB

Download
memory/4716-142-0x0000000000400000-0x00000000013C6000-memory.dmp

Filesize
15.8MB

Download
memory/4716-139-0x0000000000000000-mapping.dmp

Download
memory/4716-147-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/4716-152-0x0000000000400000-0x00000000013C6000-memory.dmp

Filesize
15.8MB

Download
memory/4716-155-0x0000000000400000-0x00000000013C6000-memory.dmp

Filesize
15.8MB

Download
memory/4756-134-0x0000000000000000-mapping.dmp

Download
memory/5068-132-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/5068-151-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/5068-135-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/5068-156-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download

Analysis

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